Subject: [Fot] Camshaft recommendation

From: Michael Zbarsky via Fot <[email-masked]>
Date: Mon, 10 Feb 2020 01:34:27 +0000 (UTC)

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Hi all, I=E2=80=99m building a TR6 race engine and have a set of 1.65 ratio=
 roller rockers from Goodparts. Any recommendations for a suitable camshaft=
? I will be putting in cam bearings.=C2=A0
Thanks, Mike

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if gte mso 9]><xml><o:OfficeDocumentSettings><o:AllowPNG/><o:PixelsPerInch>=
96</o:PixelsPerInch></o:OfficeDocumentSettings></xml><![endif]--></head><bo=
dy>
Hi all, I=E2=80=99m building a TR6 race engine and have a set of 1.65 ratio=
 roller rockers from Goodparts. Any recommendations for a suitable camshaft=
? I will be putting in cam bearings.&nbsp;<div><br><div>Thanks, Mike<br><br=
><br></div></div>
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_______________________________________________
[email-masked]

http://www.fot-racing.com

Archive: http://autox.team.net/archive http://www.team.net/pipermail/fot

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From: "van.mulders.marcel--- via Fot" <[email-masked]>
Date: Mon, 10 Feb 2020 14:51:41 +0100 (CET)

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I also once bought a Goodparts 1.65 rocker roller assembly for a TR6 engine=
, but in the end I had to use a 1.55 roller rocker assembly, also from Good=
parts, because, with the 1.65, it is difficult to find a race camshaft with=
 a lobe lift that is low enough. With lobes of 8mm or higher, I could not f=
ind valve springs to cope with the high valve lift. I bought a G5 camshaft =
from Schneider, they call it the 320-F grind (duration is 268=C2=B0 at 0.05=
0", timing is 57-83 87-53 , installation figure is then 103=C2=B0 :is that =
the same as the G5 grind?) with 0.340"/8.6mm cam lift and that makes for a =
valve lift of 12.9mm with the 1.55 rocker arms. With 1.65 rockers , valve l=
ift would be 14.2mm and I could not find valve springs for that lift. The v=
alve springs I used are part no 281003-063.20 from Summit (Isky), 320lb/inc=
h spring rate. They recommend 0.45"/11.43mm (1.250" - 0.800"from closed to =
full open position, so it is about 1.4mm more in my engine, but there is no=
 problem concerning coil binding : the installed height is a 1mm more than =
1.250 , the pressure in closed position is lower of course, but still 34kgs=
 (105kgs at full lift) an that seems to be enough till 7500 rpm=20
Racetorations have a race cam with 7.6mm cam lift, probably that would work=
 with 1.65 rocker arms. I still have the 1.65 rocker assembly, it is new an=
d it could work with a road cam or any camshaft with a maximum of 8mm cam l=
ift.=20
Marcel=20

Van: "fot" <[email-masked]>=20
Aan: "fot" <[email-masked]>=20
Verzonden: Maandag 10 februari 2020 02:34:27=20
Onderwerp: [Fot] Camshaft recommendation=20

Hi all, I=E2=80=99m building a TR6 race engine and have a set of 1.65 ratio=
 roller rockers from Goodparts. Any recommendations for a suitable camshaft=
? I will be putting in cam bearings.=20

Thanks, Mike=20

_______________________________________________=20
[email-masked]=20

http://www.fot-racing.com=20

Archive: http://autox.team.net/archive http://www.team.net/pipermail/fot=20
[email-masked]=20

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<html><body><div style=3D"font-family: Verdana, Arial, Helvetica, sans-seri=
f; font-size: 10pt; color: #000000"><div>I also once bought a Goodparts 1.6=
5 rocker roller assembly for a TR6 engine, but in the end I had to use a 1.=
55 roller rocker assembly, also from Goodparts, because, with the 1.65, it =
is difficult to find a race camshaft with a&nbsp; lobe lift that is low eno=
ugh. With lobes of 8mm or higher, I could not find valve springs to cope wi=
th the high valve lift. I bought a G5 camshaft from Schneider, they call it=
&nbsp; the 320-F grind (duration is 268=C2=B0 at 0.050", timing is 57-83&nb=
sp; &nbsp; 87-53 , installation figure is then 103=C2=B0 :is that the same =
as the G5 grind?) with 0.340"/8.6mm cam lift and that makes for a&nbsp; val=
ve lift of 12.9mm with the 1.55 rocker arms. With 1.65 rockers , valve lift=
 would be 14.2mm and I could not find valve springs for that lift. The valv=
e springs I used are part no 281003-063.20 from Summit (Isky), 320lb/inch s=
pring rate. They recommend 0.45"/11.43mm&nbsp; (1.250" - 0.800"from closed =
to full open position, so it is about 1.4mm more in my engine, but there is=
 no problem concerning&nbsp; coil binding : the installed height is a 1mm m=
ore than 1.250 , the pressure in closed position is lower&nbsp; of course, =
but still 34kgs (105kgs at full lift) an that seems to be enough till 7500 =
rpm</div><div>Racetorations have a race cam with 7.6mm cam lift, probably t=
hat would work with 1.65 rocker arms. I still have the 1.65 rocker assembly=
, it is new and it could work with a road cam or any camshaft with a maximu=
m of 8mm cam lift.</div><div>Marcel</div><div><br></div><hr id=3D"zwchr" da=
ta-marker=3D"__DIVIDER__"><div data-marker=3D"__HEADERS__"><b>Van: </b>"fot=
" &lt;[email-masked]&gt;<br><b>Aan: </b>"fot" &lt;[email-masked]&gt=
;<br><b>Verzonden: </b>Maandag 10 februari 2020 02:34:27<br><b>Onderwerp: <=
/b>[Fot] Camshaft recommendation<br></div><div><br></div><div data-marker=
=3D"__QUOTED_TEXT__">
Hi all, I=E2=80=99m building a TR6 race engine and have a set of 1.65 ratio=
 roller rockers from Goodparts. Any recommendations for a suitable camshaft=
? I will be putting in cam bearings.&nbsp;<div><br><div>Thanks, Mike<br><br=
><br></div></div>
<br>_______________________________________________<br>[email-masked]<b=
r><br>http://www.fot-racing.com<br><br>Donate: http://www.team.net/donate.h=
tml<br>Archive: http://autox.team.net/archive http://www.team.net/pipermail=
/fot<br>Unsubscribe/Manage: http://autox.team.net/mailman/options/fot/van.m=
[email-masked]<br></div></div></body></html>
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From: vfracing--- via Fot <[email-masked]>
Date: Mon, 10 Feb 2020 14:05:03 +0000 (UTC)

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We played around with rocker ratios on a computer simulation of a TR4 engin=
e. =C2=A0The added lift increased max HP by about 3 HP peak. =C2=A0Low end =
(under about 3500 rpm) torque was actually reduced a very small amount. =C2=
=A0If the TR6 results were similar, probably not worth the hassle of added =
valve spring issues and reduced valve guide length (greater valve guide wea=
r).
For what it's worth....
Phil

-----Original Message-----
From: van.mulders.marcel--- via Fot <[email-masked]>
To: Michael Zbarsky <[email-masked]>
Cc: fot <[email-masked]>
Sent: Mon, Feb 10, 2020 8:52 am
Subject: Re: [Fot] Camshaft recommendation

I also once bought a Goodparts 1.65 rocker roller assembly for a TR6 engine=
, but in the end I had to use a 1.55 roller rocker assembly, also from Good=
parts, because, with the 1.65, it is difficult to find a race camshaft with=
 a=C2=A0 lobe lift that is low enough. With lobes of 8mm or higher, I could=
 not find valve springs to cope with the high valve lift. I bought a G5 cam=
shaft from Schneider, they call it=C2=A0 the 320-F grind (duration is 268=
=C2=B0 at 0.050", timing is 57-83=C2=A0 =C2=A0 87-53 , installation figure =
is then 103=C2=B0 :is that the same as the G5 grind?) with 0.340"/8.6mm cam=
 lift and that makes for a=C2=A0 valve lift of 12.9mm with the 1.55 rocker =
arms. With 1.65 rockers , valve lift would be 14.2mm and I could not find v=
alve springs for that lift. The valve springs I used are part no 281003-063=
.20 from Summit (Isky), 320lb/inch spring rate. They recommend 0.45"/11.43m=
m=C2=A0 (1.250" - 0.800"from closed to full open position, so it is about 1=
.4mm more in my engine, but there is no problem concerning=C2=A0 coil bindi=
ng : the installed height is a 1mm more than 1.250 , the pressure in closed=
 position is lower=C2=A0 of course, but still 34kgs (105kgs at full lift) a=
n that seems to be enough till 7500 rpmRacetorations have a race cam with 7=
.6mm cam lift, probably that would work with 1.65 rocker arms. I still have=
 the 1.65 rocker assembly, it is new and it could work with a road cam or a=
ny camshaft with a maximum of 8mm cam lift.Marcel
Van: "fot" <[email-masked]>
Aan: "fot" <[email-masked]>
Verzonden: Maandag 10 februari 2020 02:34:27
Onderwerp: [Fot] Camshaft recommendation

[email-masked]

com

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<div style=3D"color:black;font: 10pt arial;">We played around with rocker r=
atios on a computer simulation of a TR4 engine. &nbsp;The added lift increa=
sed max HP by about 3 HP peak. &nbsp;Low end (under about 3500 rpm) torque =
was actually reduced a very small amount. &nbsp;If the TR6 results were sim=
ilar, probably not worth the hassle of added valve spring issues and reduce=
d valve guide length (greater valve guide wear).
<div><br>
</div>

<div>For what it's worth....</div>

<div><br>
</div>

<div>Phil<br>
<br>
<br>

<div style=3D"font-family:helvetica,arial;font-size:10pt;color:black">-----=
Original Message-----<br>
From: van.mulders.marcel--- via Fot &lt;[email-masked]&gt;<br>
To: Michael Zbarsky &lt;[email-masked]&gt;<br>
Cc: fot &lt;[email-masked]&gt;<br>
Sent: Mon, Feb 10, 2020 8:52 am<br>
Subject: Re: [Fot] Camshaft recommendation<br>
<br>

<div id=3D"yiv7723969363">
<div>
<div style=3D"font-family:Verdana, Arial, Helvetica, sans-serif;font-size:1=
0pt;color:#000000;">
<div>I also once bought a Goodparts 1.65 rocker roller assembly for a TR6 e=
ngine, but in the end I had to use a 1.55 roller rocker assembly, also from=
 Goodparts, because, with the 1.65, it is difficult to find a race camshaft=
 with a&nbsp; lobe lift that is low enough. With lobes of 8mm or higher, I =
could not find valve springs to cope with the high valve lift. I bought a G=
5 camshaft from Schneider, they call it&nbsp; the 320-F grind (duration is =
268=C2=B0 at 0.050", timing is 57-83&nbsp; &nbsp; 87-53 , installation figu=
re is then 103=C2=B0 :is that the same as the G5 grind?) with 0.340"/8.6mm =
cam lift and that makes for a&nbsp; valve lift of 12.9mm with the 1.55 rock=
er arms. With 1.65 rockers , valve lift would be 14.2mm and I could not fin=
d valve springs for that lift. The valve springs I used are part no 281003-=
063.20 from Summit (Isky), 320lb/inch spring rate. They recommend 0.45"/11.=
43mm&nbsp; (1.250" - 0.800"from closed to full open position, so it is abou=
t 1.4mm more in my engine, but there is no problem concerning&nbsp; coil bi=
nding : the installed height is a 1mm more than 1.250 , the pressure in clo=
sed position is lower&nbsp; of course, but still 34kgs (105kgs at full lift=
) an that seems to be enough till 7500 rpm</div>

<div>Racetorations have a race cam with 7.6mm cam lift, probably that would=
 work with 1.65 rocker arms. I still have the 1.65 rocker assembly, it is n=
ew and it could work with a road cam or any camshaft with a maximum of 8mm =
cam lift.</div>

<div>Marcel</div>

<div><br clear=3D"none"></div>
<hr id=3D"yiv7723969363zwchr">
<div class=3D"yiv7723969363yqt1883404066" id=3D"yiv7723969363yqtfd49773">
<div><b>Van: </b>"fot" &lt;[email-masked]&gt;<br clear=3D"none"><b>Aan:=
 </b>"fot" &lt;[email-masked]&gt;<br clear=3D"none"><b>Verzonden: </b>M=
aandag 10 februari 2020 02:34:27<br clear=3D"none"><b>Onderwerp: </b>[Fot] =
Camshaft recommendation<br clear=3D"none"></div>

<div><br clear=3D"none"></div>
</div>

<div>
<div class=3D"yiv7723969363yqt1883404066" id=3D"yiv7723969363yqtfd09093">
Hi all, I=E2=80=99m building a TR6 race engine and have a set of 1.65 ratio=
 roller rockers from Goodparts. Any recommendations for a suitable camshaft=
? I will be putting in cam bearings.&nbsp;
<div><br clear=3D"none">
<div>Thanks, Mike<br clear=3D"none"><br clear=3D"none"><br clear=3D"none"><=
/div>
</div>

<br clear=3D"none">_______________________________________________<br clear=
=3D"none">[email-masked]<br clear=3D"none"><br clear=3D"none">http://ww=
w.fot-racing.com<br clear=3D"none"><br clear=3D"none">Donate: http://www.te=
am.net/donate.html<br clear=3D"none">Archive: http://autox.team.net/archive=
 http://www.team.net/pipermail/fot</div>
<br clear=3D"none">Unsubscribe/Manage: http://autox.team.net/mailman/option=
s/fot/[email-masked]
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r clear=3D"none"></div>
</div>
</div>
</div>
</div>

<div class=3D"yqt1883404066" id=3D"yqtfd20141">____________________________=
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From: Enquiries Road & Track via Fot <[email-masked]>
Date: Tue, 11 Feb 2020 07:00:18 +1000

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when i last flowed our race head, we got steady increases up to 0.550"
lift.

its easy enough to spot face the spring base on the head to use longer
springs

Terry

On Mon, Feb 10, 2020 at 11:52 PM van.mulders.marcel--- via Fot <
[email-masked]> wrote:

> I also once bought a Goodparts 1.65 rocker roller assembly for a TR6
> engine, but in the end I had to use a 1.55 roller rocker assembly, also
> from Goodparts, because, with the 1.65, it is difficult to find a race
> camshaft with a  lobe lift that is low enough. With lobes of 8mm or highe=
r,
> I could not find valve springs to cope with the high valve lift. I bought=
 a
> G5 camshaft from Schneider, they call it  the 320-F grind (duration is 26=
8=C2=B0
> at 0.050", timing is 57-83    87-53 , installation figure is then 103=C2=
=B0 :is
> that the same as the G5 grind?) with 0.340"/8.6mm cam lift and that makes
> for a  valve lift of 12.9mm with the 1.55 rocker arms. With 1.65 rockers =
,
> valve lift would be 14.2mm and I could not find valve springs for that
> lift. The valve springs I used are part no 281003-063.20 from Summit
> (Isky), 320lb/inch spring rate. They recommend 0.45"/11.43mm  (1.250" -
> 0.800"from closed to full open position, so it is about 1.4mm more in my
> engine, but there is no problem concerning  coil binding : the installed
> height is a 1mm more than 1.250 , the pressure in closed position is lowe=
r
> of course, but still 34kgs (105kgs at full lift) an that seems to be enou=
gh
> till 7500 rpm
> Racetorations have a race cam with 7.6mm cam lift, probably that would
> work with 1.65 rocker arms. I still have the 1.65 rocker assembly, it is
> new and it could work with a road cam or any camshaft with a maximum of 8=
mm
> cam lift.
> Marcel
>
> ------------------------------
> *Van: *"fot" <[email-masked]>
> *Aan: *"fot" <[email-masked]>
> *Verzonden: *Maandag 10 februari 2020 02:34:27
> *Onderwerp: *[Fot] Camshaft recommendation
>
> Hi all, I=E2=80=99m building a TR6 race engine and have a set of 1.65 rat=
io roller
> rockers from Goodparts. Any recommendations for a suitable camshaft? I wi=
ll
> be putting in cam bearings.
>
> Thanks, Mike
>
>
>
> Donate: http://www.team.net/donate.html
> Unsubscribe/Manage:
> http://autox.team.net/mailman/options/fot/[email-masked]
> Donate: http://www.team.net/donate.html
> Unsubscribe/Manage <http://www.team.net/pipermail/fotUnsubscribe/Manage>:
> http://autox.team.net/mailman/options/fot/[email-masked]
>
>
>

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<div dir=3D"ltr">when i last flowed our race head, we got steady increases =
up to 0.550&quot; lift.=C2=A0<div><br></div><div>its easy enough to spot fa=
ce the spring base on the head to use longer springs<br><div><br></div><div=
>Terry<br clear=3D"all"><div><div dir=3D"ltr" class=3D"gmail_signature" dat=
a-smartmail=3D"gmail_signature"><div dir=3D"ltr"><div><div dir=3D"ltr"><div=
><div dir=3D"ltr"><div><div dir=3D"ltr"><div><div dir=3D"ltr"><div><div dir=
=3D"ltr"><div><br></div></div></div></div></div></div></div></div></div></d=
iv></div></div></div></div><br></div></div></div><br><div class=3D"gmail_qu=
ote"><div dir=3D"ltr" class=3D"gmail_attr">On Mon, Feb 10, 2020 at 11:52 PM=
 van.mulders.marcel--- via Fot &lt;<a href=3D"mailto:[email-masked]">fo=
[email-masked]</a>&gt; wrote:<br></div><blockquote class=3D"gmail_quote" =
style=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);pa=
dding-left:1ex"><div><div style=3D"font-family:Verdana,Arial,Helvetica,sans=
-serif;font-size:10pt;color:rgb(0,0,0)"><div>I also once bought a Goodparts=
 1.65 rocker roller assembly for a TR6 engine, but in the end I had to use =
a 1.55 roller rocker assembly, also from Goodparts, because, with the 1.65,=
 it is difficult to find a race camshaft with a=C2=A0 lobe lift that is low=
 enough. With lobes of 8mm or higher, I could not find valve springs to cop=
e with the high valve lift. I bought a G5 camshaft from Schneider, they cal=
l it=C2=A0 the 320-F grind (duration is 268=C2=B0 at 0.050&quot;, timing is=
 57-83=C2=A0 =C2=A0 87-53 , installation figure is then 103=C2=B0 :is that =
the same as the G5 grind?) with 0.340&quot;/8.6mm cam lift and that makes f=
or a=C2=A0 valve lift of 12.9mm with the 1.55 rocker arms. With 1.65 rocker=
s , valve lift would be 14.2mm and I could not find valve springs for that =
lift. The valve springs I used are part no 281003-063.20 from Summit (Isky)=
, 320lb/inch spring rate. They recommend 0.45&quot;/11.43mm=C2=A0 (1.250&qu=
ot; - 0.800&quot;from closed to full open position, so it is about 1.4mm mo=
re in my engine, but there is no problem concerning=C2=A0 coil binding : th=
e installed height is a 1mm more than 1.250 , the pressure in closed positi=
on is lower=C2=A0 of course, but still 34kgs (105kgs at full lift) an that =
seems to be enough till 7500 rpm</div><div>Racetorations have a race cam wi=
th 7.6mm cam lift, probably that would work with 1.65 rocker arms. I still =
have the 1.65 rocker assembly, it is new and it could work with a road cam =
or any camshaft with a maximum of 8mm cam lift.</div><div>Marcel</div><div>=
<br></div><hr id=3D"gmail-m_-9082697910296379686zwchr"><div><b>Van: </b>&qu=
ot;fot&quot; &lt;<a href=3D"mailto:[email-masked]" target=3D"_blank">fo=
[email-masked]</a>&gt;<br><b>Aan: </b>&quot;fot&quot; &lt;<a href=3D"mail=
to:[email-masked]" target=3D"_blank">[email-masked]</a>&gt;<br><b>V=
erzonden: </b>Maandag 10 februari 2020 02:34:27<br><b>Onderwerp: </b>[Fot] =
Camshaft recommendation<br></div><div><br></div><div>
Hi all, I=E2=80=99m building a TR6 race engine and have a set of 1.65 ratio=
 roller rockers from Goodparts. Any recommendations for a suitable camshaft=
? I will be putting in cam bearings.=C2=A0<div><br><div>Thanks, Mike<br><br=
><br></div></div>
<br>_______________________________________________<br><a href=3D"mailto:fo=
[email-masked]" target=3D"_blank">[email-masked]</a><br><br><a href=
=3D"http://www.fot-racing.com" target=3D"_blank">http://www.fot-racing.com<=
/a><br><br>Donate: <a href=3D"http://www.team.net/donate.html" target=3D"_b=
lank">http://www.team.net/donate.html</a><br>Archive: <a href=3D"http://aut=
ox.team.net/archive" target=3D"_blank">http://autox.team.net/archive</a> <a=
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et=3D"_blank">http://www.team.net/donate.html</a><br>
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From: Geoff Byrne via Fot <[email-masked]>
Date: Tue, 11 Feb 2020 11:07:06 +1100

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Ditch the 1.65 rockers no good for racing
Geoff Byrne
TR6 racer down under

Sent from my iPhone

> On 11 Feb 2020, at 12:52 am, van.mulders.marcel--- via Fot <[email-masked]=
.net> wrote:
>=20
> =EF=BB=BF
> I also once bought a Goodparts 1.65 rocker roller assembly for a TR6 engin=
e, but in the end I had to use a 1.55 roller rocker assembly, also from Good=
parts, because, with the 1.65, it is difficult to find a race camshaft with a=
  lobe lift that is low enough. With lobes of 8mm or higher, I could not fin=
d valve springs to cope with the high valve lift. I bought a G5 camshaft fro=
m Schneider, they call it  the 320-F grind (duration is 268=C2=B0 at 0.050",=
 timing is 57-83    87-53 , installation figure is then 103=C2=B0 :is that t=
he same as the G5 grind?) with 0.340"/8.6mm cam lift and that makes for a  v=
alve lift of 12.9mm with the 1.55 rocker arms. With 1.65 rockers , valve lif=
t would be 14.2mm and I could not find valve springs for that lift. The valv=
e springs I used are part no 281003-063.20 from Summit (Isky), 320lb/inch sp=
ring rate. They recommend 0.45"/11.43mm  (1.250" - 0.800"from closed to full=
 open position, so it is about 1.4mm more in my engine, but there is no prob=
lem concerning  coil binding : the installed height is a 1mm more than 1.250=
 , the pressure in closed position is lower  of course, but still 34kgs (105=
kgs at full lift) an that seems to be enough till 7500 rpm
> Racetorations have a race cam with 7.6mm cam lift, probably that would wor=
k with 1.65 rocker arms. I still have the 1.65 rocker assembly, it is new an=
d it could work with a road cam or any camshaft with a maximum of 8mm cam li=
ft.
>=20
>=20
> Hi all, I=E2=80=99m building a TR6 race engine and have a set of 1.65 rati=
o roller rockers from Goodparts. Any recommendations for a suitable camshaft=
? I will be putting in cam bearings.=20
>=20
>=20
>=20
>=20
>=20
>=20
> Unsubscribe/Manage: http://autox.team.net/mailman/options/fot/van.mulders.=
[email-masked]
>=20
>=20
> Unsubscribe/Manage: http://autox.team.net/mailman/options/fot/gkbyrne@optu=
shome.com.au
>=20
>=20

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<html><head><meta http-equiv=3D"content-type" content=3D"text/html; charset=3D=
utf-8"></head><body dir=3D"auto">Ditch the 1.65 rockers no good for racing<d=
iv>Geoff Byrne</div><div>TR6 racer down under<br><br><div dir=3D"ltr">Sent f=
rom my iPhone</div><div dir=3D"ltr"><br><blockquote type=3D"cite">On 11 Feb 2=
020, at 12:52 am, van.mulders.marcel--- via Fot &lt;[email-masked]&gt; w=
rote:<br><br></blockquote></div><blockquote type=3D"cite"><div dir=3D"ltr">=EF=
=BB=BF<div style=3D"font-family: Verdana, Arial, Helvetica, sans-serif; font=
-size: 10pt; color: #000000"><div>I also once bought a Goodparts 1.65 rocker=
 roller assembly for a TR6 engine, but in the end I had to use a 1.55 roller=
 rocker assembly, also from Goodparts, because, with the 1.65, it is difficu=
lt to find a race camshaft with a&nbsp; lobe lift that is low enough. With l=
obes of 8mm or higher, I could not find valve springs to cope with the high v=
alve lift. I bought a G5 camshaft from Schneider, they call it&nbsp; the 320=
-F grind (duration is 268=C2=B0 at 0.050", timing is 57-83&nbsp; &nbsp; 87-5=
3 , installation figure is then 103=C2=B0 :is that the same as the G5 grind?=
) with 0.340"/8.6mm cam lift and that makes for a&nbsp; valve lift of 12.9mm=
 with the 1.55 rocker arms. With 1.65 rockers , valve lift would be 14.2mm a=
nd I could not find valve springs for that lift. The valve springs I used ar=
e part no 281003-063.20 from Summit (Isky), 320lb/inch spring rate. They rec=
ommend 0.45"/11.43mm&nbsp; (1.250" - 0.800"from closed to full open position=
, so it is about 1.4mm more in my engine, but there is no problem concerning=
&nbsp; coil binding : the installed height is a 1mm more than 1.250 , the pr=
essure in closed position is lower&nbsp; of course, but still 34kgs (105kgs a=
t full lift) an that seems to be enough till 7500 rpm</div><div>Racetoration=
s have a race cam with 7.6mm cam lift, probably that would work with 1.65 ro=
cker arms. I still have the 1.65 rocker assembly, it is new and it could wor=
k with a road cam or any camshaft with a maximum of 8mm cam lift.</div><div>=
Marcel</div><div><br></div><hr id=3D"zwchr" data-marker=3D"__DIVIDER__"><div=
 data-marker=3D"__HEADERS__"><b>Van: </b>"fot" &lt;[email-masked]&gt;<br=
><b>Aan: </b>"fot" &lt;[email-masked]&gt;<br><b>Verzonden: </b>Maandag 1=
0 februari 2020 02:34:27<br><b>Onderwerp: </b>[Fot] Camshaft recommendation<=
br></div><div><br></div><div data-marker=3D"__QUOTED_TEXT__">
Hi all, I=E2=80=99m building a TR6 race engine and have a set of 1.65 ratio r=
oller rockers from Goodparts. Any recommendations for a suitable camshaft? I=
 will be putting in cam bearings.&nbsp;<div><br><div>Thanks, Mike<br><br><br=
></div></div>
<br>_______________________________________________<br>[email-masked]<br=
><br>http://www.fot-racing.com<br><br>Donate: http://www.team.net/donate.htm=
l<br>Archive: http://autox.team.net/archive http://www.team.net/pipermail/fo=
t<br>Unsubscribe/Manage: http://autox.team.net/mailman/options/fot/van.mulde=
[email-masked]<br></div></div><span>__________________________________=
_____________</span><br><span>[email-masked]</span><br><span></span><br>=
<span>http://www.fot-racing.com</span><br><span></span><br><span>Donate: htt=
p://www.team.net/donate.html</span><br><span>Archive: http://autox.team.net/=
archive http://www.team.net/pipermail/fot</span><br><span>Unsubscribe/Manage=
: http://autox.team.net/mailman/options/fot/[email-masked]</span><=
br><span></span><br><span></span><br></div></blockquote></div></body></html>=

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From: Michael Zbarsky via Fot <[email-masked]>
Date: Tue, 11 Feb 2020 15:32:17 +0000 (UTC)

--===============4633791565989662857==
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Thanks everyone! Good stuff. I=E2=80=99m sticking to a redline of just over=
=C2=A06K. I=E2=80=99d also like to keep the 1.65 setup rather than invest i=
n a 1.55 so keep the intel and=C2=A0suggestions coming. The GP3 is a defini=
te contender.=C2=A0
Mike=C2=A0

On Monday, February 10, 2020, 4:07 PM, Geoff Byrne <[email-masked]=
> wrote:

Ditch the 1.65 rockers no good for racingGeoff ByrneTR6 racer down under

Sent from my iPhone

On 11 Feb 2020, at 12:52 am, van.mulders.marcel--- via Fot <[email-masked].=
net> wrote:

=EF=BB=BFI also once bought a Goodparts 1.65 rocker roller assembly for a T=
R6 engine, but in the end I had to use a 1.55 roller rocker assembly, also =
from Goodparts, because, with the 1.65, it is difficult to find a race cams=
haft with a=C2=A0 lobe lift that is low enough. With lobes of 8mm or higher=
, I could not find valve springs to cope with the high valve lift. I bought=
 a G5 camshaft from Schneider, they call it=C2=A0 the 320-F grind (duration=
 is 268=C2=B0 at 0.050", timing is 57-83=C2=A0 =C2=A0 87-53 , installation =
figure is then 103=C2=B0 :is that the same as the G5 grind?) with 0.340"/8.=
6mm cam lift and that makes for a=C2=A0 valve lift of 12.9mm with the 1.55 =
rocker arms. With 1.65 rockers , valve lift would be 14.2mm and I could not=
 find valve springs for that lift. The valve springs I used are part no 281=
003-063.20 from Summit (Isky), 320lb/inch spring rate. They recommend 0.45"=
/11.43mm=C2=A0 (1.250" - 0.800"from closed to full open position, so it is =
about 1.4mm more in my engine, but there is no problem concerning=C2=A0 coi=
l binding : the installed height is a 1mm more than 1.250 , the pressure in=
 closed position is lower=C2=A0 of course, but still 34kgs (105kgs at full =
lift) an that seems to be enough till 7500 rpmRacetorations have a race cam=
 with 7.6mm cam lift, probably that would work with 1.65 rocker arms. I sti=
ll have the 1.65 rocker assembly, it is new and it could work with a road c=
am or any camshaft with a maximum of 8mm cam lift.Marcel
Van: "fot" <[email-masked]>
Aan: "fot" <[email-masked]>
Verzonden: Maandag 10 februari 2020 02:34:27
Onderwerp: [Fot] Camshaft recommendation

home.com.au

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<html xmlns=3D"http://www.w3.org/1999/xhtml" xmlns:v=3D"urn:schemas-microso=
ft-com:vml" xmlns:o=3D"urn:schemas-microsoft-com:office:office"><head><!--[=
if gte mso 9]><xml><o:OfficeDocumentSettings><o:AllowPNG/><o:PixelsPerInch>=
96</o:PixelsPerInch></o:OfficeDocumentSettings></xml><![endif]--></head><bo=
dy>
Thanks everyone! Good stuff. I=E2=80=99m sticking to a redline of just over=
&nbsp;6K. I=E2=80=99d also like to keep the 1.65 setup rather than invest i=
n a 1.55 so keep the intel and&nbsp;suggestions coming. The GP3 is a defini=
te contender.&nbsp;<div><br></div><div>Mike&nbsp;<br><br><br><br><p class=
=3D"yahoo-quoted-begin" style=3D"font-size: 15px; color: #715FFA; padding-t=
op: 15px; margin-top: 0">On Monday, February 10, 2020, 4:07 PM, Geoff Byrne=
 &lt;[email-masked]&gt; wrote:</p><blockquote class=3D"iosymail"><=
div id=3D"yiv0747455949"><div>Ditch the 1.65 rockers no good for racing<div=
>Geoff Byrne</div><div>TR6 racer down under<br clear=3D"none"><br clear=3D"=
none"><div dir=3D"ltr">Sent from my iPhone</div><div dir=3D"ltr"><br clear=
=3D"none"><blockquote type=3D"cite">On 11 Feb 2020, at 12:52 am, van.mulder=
s.marcel--- via Fot &lt;[email-masked]&gt; wrote:<br clear=3D"none"><br=
 clear=3D"none"></blockquote></div><blockquote type=3D"cite"><div dir=3D"lt=
r">=EF=BB=BF<div style=3D"font-family:Verdana, Arial, Helvetica, sans-serif=
;font-size:10pt;color:#000000;"><div>I also once bought a Goodparts 1.65 ro=
cker roller assembly for a TR6 engine, but in the end I had to use a 1.55 r=
oller rocker assembly, also from Goodparts, because, with the 1.65, it is d=
ifficult to find a race camshaft with a&nbsp; lobe lift that is low enough.=
 With lobes of 8mm or higher, I could not find valve springs to cope with t=
he high valve lift. I bought a G5 camshaft from Schneider, they call it&nbs=
p; the 320-F grind (duration is 268=C2=B0 at 0.050", timing is 57-83&nbsp; =
&nbsp; 87-53 , installation figure is then 103=C2=B0 :is that the same as t=
he G5 grind?) with 0.340"/8.6mm cam lift and that makes for a&nbsp; valve l=
ift of 12.9mm with the 1.55 rocker arms. With 1.65 rockers , valve lift wou=
ld be 14.2mm and I could not find valve springs for that lift. The valve sp=
rings I used are part no 281003-063.20 from Summit (Isky), 320lb/inch sprin=
g rate. They recommend 0.45"/11.43mm&nbsp; (1.250" - 0.800"from closed to f=
ull open position, so it is about 1.4mm more in my engine, but there is no =
problem concerning&nbsp; coil binding : the installed height is a 1mm more =
than 1.250 , the pressure in closed position is lower&nbsp; of course, but =
still 34kgs (105kgs at full lift) an that seems to be enough till 7500 rpm<=
/div><div>Racetorations have a race cam with 7.6mm cam lift, probably that =
would work with 1.65 rocker arms. I still have the 1.65 rocker assembly, it=
 is new and it could work with a road cam or any camshaft with a maximum of=
 8mm cam lift.</div><div>Marcel</div><div><br clear=3D"none"></div><hr id=
=3D"yiv0747455949zwchr"><div><b>Van: </b>"fot" &lt;[email-masked]&gt;<b=
r clear=3D"none"><b>Aan: </b>"fot" &lt;[email-masked]&gt;<br clear=3D"n=
one"><b>Verzonden: </b>Maandag 10 februari 2020 02:34:27<br clear=3D"none">=
<b>Onderwerp: </b>[Fot] Camshaft recommendation<br clear=3D"none"></div><di=
v><br clear=3D"none"></div><div>
Hi all, I=E2=80=99m building a TR6 race engine and have a set of 1.65 ratio=
 roller rockers from Goodparts. Any recommendations for a suitable camshaft=
? I will be putting in cam bearings.&nbsp;<div><br clear=3D"none"><div>Than=
ks, Mike<br clear=3D"none"><br clear=3D"none"><br clear=3D"none"></div></di=
v>
<br clear=3D"none">_______________________________________________<br clear=
=3D"none">[email-masked]<br clear=3D"none"><br clear=3D"none">http://ww=
w.fot-racing.com<br clear=3D"none"><br clear=3D"none">Donate: http://www.te=
am.net/donate.html<br clear=3D"none">Archive: http://autox.team.net/archive=
 http://www.team.net/pipermail/fot<br clear=3D"none">Unsubscribe/Manage: ht=
tp://autox.team.net/mailman/options/fot/[email-masked]<div c=
lass=3D"yiv0747455949yqt5723059911" id=3D"yiv0747455949yqtfd51209"><br clea=
r=3D"none"></div></div></div><div class=3D"yiv0747455949yqt5723059911" id=
=3D"yiv0747455949yqtfd38997"><span>________________________________________=
_______</span><br clear=3D"none"><span>[email-masked]</span><br clear=
=3D"none"><span></span><br clear=3D"none"><span>http://www.fot-racing.com</=
span><br clear=3D"none"><span></span><br clear=3D"none"><span>Donate: http:=
//www.team.net/donate.html</span><br clear=3D"none"><span>Archive: http://a=
utox.team.net/archive http://www.team.net/pipermail/fot</span></div><br cle=
ar=3D"none"><span>Unsubscribe/Manage: http://autox.team.net/mailman/options=
/fot/[email-masked]</span><div class=3D"yiv0747455949yqt572305991=
1" id=3D"yiv0747455949yqtfd70749"><br clear=3D"none"><span></span><br clear=
=3D"none"><span></span><br clear=3D"none"></div></div></blockquote></div></=
div></div><blockquote></blockquote></blockquote></div>
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