Subject: Re: [Fot] Gt6 oil pressure?

From: "Steve Yott" <[email-masked]>
Date: Thu, 6 Oct 2016 10:03:47 -0500

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Brian,

The hot running oil pressure of 100 is a little high and you can change this
with modifying the bypass spring pressure.  The cold starting oil pressure
issue is more of a concern to me.  Are you by chance running an oil cooler
without a thermostatic valve?  Different brands of cooler take off heads
circulate the oil in various manners depending on how the by-pass is
engineered into the filter head.

Steve Yott

From: Fot [mailto:[email-masked]] On Behalf Of Brian
Sent: Wednesday, October 05, 2016 6:10 PM
To: FOT
Subject: [Fot] Gt6 oil pressure?

New motor. 12:1 comp. At cold start up oil pressure fluctuates from
20-60psi. Once warm (approx 180 deg Fahrenheit) pressure is consistent with
rpm increase. At idle hot is 60psi. Upwards of 100psi at 5000rpm. 5-7k is
were it will rev during race condition. 
Now FYI - this is the first motor by the book with precise measures.
Previously it's been "well this is what I can afford" . Getting older and
get tired working the wheel so thought I'd try something a little different.

My concern is the cold oil psi fluctuation and the higher than previous high
rev psi.

Thoughts please. Before I tow it to northern VT for hill climb next week.
Thanks, 
Brian 
Foster, RI

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<p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Brian,<o:p></o:p></span></p>

<p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p>&nbsp;</o:p></span></p>

<p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>The hot running oil pressure of 100 is a little high and =
you can
change this with modifying the bypass spring pressure.&nbsp; The cold =
starting
oil pressure issue is more of a concern to me.&nbsp; Are you by chance =
running
an oil cooler without a thermostatic valve?&nbsp; Different brands of =
cooler
take off heads circulate the oil in various manners depending on how the
by-pass is engineered into the filter head.<o:p></o:p></span></p>

<p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p>&nbsp;</o:p></span></p>

<p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'>Steve Yott<o:p></o:p></span></p>

<p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif";
color:#1F497D'><o:p>&nbsp;</o:p></span></p>

<div>

<div style=3D'border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt =
0in 0in 0in'>

<p class=3DMsoNormal><b><span =
style=3D'font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span>=
</b><span
style=3D'font-size:10.0pt;font-family:"Tahoma","sans-serif"'> Fot
[mailto:[email-masked]] <b>On Behalf Of </b>Brian<br>
<b>Sent:</b> Wednesday, October 05, 2016 6:10 PM<br>
<b>To:</b> FOT<br>
<b>Subject:</b> [Fot] Gt6 oil pressure?<o:p></o:p></span></p>

</div>

</div>

<p class=3DMsoNormal><o:p>&nbsp;</o:p></p>

<div>

<div>

<p class=3DMsoNormal><span =
style=3D'font-size:11.0pt;font-family:"Calibri","sans-serif"'>New
motor. 12:1 comp. At cold start up oil pressure fluctuates from =
20-60psi. Once
warm (approx 180 deg Fahrenheit) pressure is consistent with rpm =
increase. At
idle hot is 60psi. Upwards of 100psi at 5000rpm. 5-7k is were it will =
rev
during race condition. <br>
Now FYI - this is the first motor by the book with precise measures. =
Previously
it's been &quot;well this is what I can afford&quot; . Getting older and =
get
tired working the wheel so thought I'd try something a little different. =
<br>
My concern is the cold oil psi fluctuation and the higher than previous =
high
rev psi.<br>
<br>
Thoughts please. Before I tow it to northern VT for hill climb next =
week.<br>
Thanks, <br>
Brian <br>
Foster, RI<o:p></o:p></span></p>

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_______________________________________________
[email-masked]

http://www.fot-racing.com

Archive: http://www.team.net/archive

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From: Duncan Charlton <[email-masked]>
Date: Thu, 6 Oct 2016 12:28:18 -0500

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Brian,

My first guess is a sticky oil pressure relief valve that loosens up =
once warm.  I=92m not sure how you could test it, but perhaps you can =
swap in a different one.

Duncan Charlton
Elgin, Texas USA

> On Oct 5, 2016, at 6:10 PM, Brian <[email-masked]> wrote:
>=20
> New motor. 12:1 comp. At cold start up oil pressure fluctuates from =
20-60psi. Once warm (approx 180 deg Fahrenheit) pressure is consistent =
with rpm increase. At idle hot is 60psi. Upwards of 100psi at 5000rpm. =
5-7k is were it will rev during race condition.=20
> Now FYI - this is the first motor by the book with precise measures. =
Previously it's been "well this is what I can afford" . Getting older =
and get tired working the wheel so thought I'd try something a little =
different.=20
> My concern is the cold oil psi fluctuation and the higher than =
previous high rev psi.
>=20
week.
> Thanks,=20
> Brian=20
>=20
>=20
> Donate: http://www.team.net/donate.html
> Forums: http://www.team.net/forums
> Unsubscribe/Manage: =
http://autox.team.net/mailman/options/fot/[email-masked]
>=20
>=20

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<html><head><meta http-equiv=3D"Content-Type" content=3D"text/html =
charset=3Dwindows-1252"></head><body style=3D"word-wrap: break-word; =
-webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" =
class=3D"">Brian,<div class=3D""><br class=3D""></div><div class=3D"">My =
first guess is a sticky oil pressure relief valve that loosens up once =
warm. &nbsp;I=92m not sure how you could test it, but perhaps you can =
swap in a different one.</div><div class=3D""><br class=3D""><div =
class=3D"">
<div class=3D"">Duncan Charlton</div><div class=3D"">Elgin, Texas =
USA</div><div class=3D""><br class=3D""></div><br =
class=3D"Apple-interchange-newline">

</div>
<br class=3D""><div><blockquote type=3D"cite" class=3D""><div =
class=3D"">On Oct 5, 2016, at 6:10 PM, Brian &lt;<a =
href=3D"mailto:[email-masked]" =
class=3D"">[email-masked]</a>&gt; wrote:</div><br =
class=3D"Apple-interchange-newline"><div class=3D""><meta =
http-equiv=3D"Content-Type" content=3D"text/html; charset=3Dwindows-1252" =
class=3D""><div class=3D""><div class=3D""><div style=3D"font-family: =
Calibri,sans-serif; font-size: 11pt;" class=3D"">New motor. 12:1 comp. =
At cold start up oil pressure fluctuates from 20-60psi. Once warm =
(approx 180 deg Fahrenheit) pressure is consistent with rpm increase. At =
idle hot is 60psi. Upwards of 100psi at 5000rpm. 5-7k is were it will =
rev during race condition. <br class=3D"">Now FYI - this is the first =
motor by the book with precise measures. Previously it's been "well this =
is what I can afford" . Getting older and get tired working the wheel so =
thought I'd try something a little different. <br class=3D"">My concern =
is the cold oil psi fluctuation and the higher than previous high rev =
psi.<br class=3D""><br class=3D"">Thoughts please. Before I tow it to =
northern VT for hill climb next week.<br class=3D"">Thanks, <br =
class=3D"">Brian <br class=3D"">Foster, RI<br =
class=3D""></div></div></div>_____________________________________________=
__<br class=3D""><a href=3D"mailto:[email-masked]" =
class=3D"">[email-masked]</a><br class=3D""><br =
class=3D"">http://www.fot-racing.com<br class=3D""><br class=3D"">Donate: =
http://www.team.net/forums<br class=3D"">Unsubscribe/Manage: =
http://autox.team.net/mailman/options/fot/[email-masked]<br =
class=3D""><br class=3D""><br class=3D""></div></blockquote></div><br =
class=3D""></div></body></html>=

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From: John Styduhar <[email-masked]>
Date: Mon, 10 Oct 2016 20:47:52 -0400

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Are you running an accusump and have you preloaded the pressure setting
correctly?  Incorrect setup will cause the oil pressure to fluctuate.

On Thu, Oct 6, 2016 at 1:28 PM, Duncan Charlton <[email-masked]=
m
> wrote:

> Brian,
>
> My first guess is a sticky oil pressure relief valve that loosens up once
> warm.  I=E2=80=99m not sure how you could test it, but perhaps you can sw=
ap in a
> different one.
> 20-60psi. Once warm (approx 180 deg Fahrenheit) pressure is consistent wi=
th
> My concern is the cold oil psi fluctuation and the higher than previous
> high rev psi.
>
> Unsubscribe/Manage: http://autox.team.net/mailman/
> options/fot/[email-masked]
>
>
>
>
> Unsubscribe/Manage: http://autox.team.net/mailman/
> options/fot/[email-masked]
>
>
>
>

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<div dir=3D"ltr"><div class=3D"gmail_default" style=3D"font-size:small">Are=
 you running an accusump and have you preloaded the pressure setting correc=
tly?=C2=A0 Incorrect setup will cause the oil pressure to fluctuate.</div><=
/div><div class=3D"gmail_extra"><br><div class=3D"gmail_quote">On Thu, Oct =
6, 2016 at 1:28 PM, Duncan Charlton <span dir=3D"ltr">&lt;<a href=3D"mailto=
:[email-masked]" target=3D"_blank">[email-masked]=
</a>&gt;</span> wrote:<br><blockquote class=3D"gmail_quote" style=3D"margin=
:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div style=3D"word=
-wrap:break-word">Brian,<div><br></div><div>My first guess is a sticky oil =
pressure relief valve that loosens up once warm.=C2=A0 I=E2=80=99m not sure=
 how you could test it, but perhaps you can swap in a different one.</div><=
div><br><div>
<div>Duncan Charlton</div><div>Elgin, Texas USA</div><div><br></div><br cla=
ss=3D"m_-7453972624223047048Apple-interchange-newline">

</div>
<br><div><blockquote type=3D"cite"><span class=3D""><div>On Oct 5, 2016, at=
 6:10 PM, Brian &lt;<a href=3D"mailto:[email-masked]" target=3D"_bla=
nk">[email-masked]</a>&gt; wrote:</div><br class=3D"m_-7453972624223=
047048Apple-interchange-newline"></span><div><span class=3D""><div><div><di=
v style=3D"font-family:Calibri,sans-serif;font-size:11pt">New motor. 12:1 c=
omp. At cold start up oil pressure fluctuates from 20-60psi. Once warm (app=
rox 180 deg Fahrenheit) pressure is consistent with rpm increase. At idle h=
ot is 60psi. Upwards of 100psi at 5000rpm. 5-7k is were it will rev during =
race condition. <br>Now FYI - this is the first motor by the book with prec=
ise measures. Previously it&#39;s been &quot;well this is what I can afford=
&quot; . Getting older and get tired working the wheel so thought I&#39;d t=
ry something a little different. <br>My concern is the cold oil psi fluctua=
tion and the higher than previous high rev psi.<br><br>Thoughts please. Bef=
ore I tow it to northern VT for hill climb next week.<br>Thanks, <br>Brian =
<br>Foster, RI<br></div></div></div></span>______________________________<w=
br>_________________<br><a href=3D"mailto:[email-masked]" target=3D"_bl=
ank">[email-masked]</a><br><br><a href=3D"http://www.fot-racing.com" ta=
rget=3D"_blank">http://www.fot-racing.com</a><br><br>Donate: <a href=3D"htt=
p://www.team.net/donate.html" target=3D"_blank">http://www.team.net/donate.=
<wbr>html</a><br>Archive: <a href=3D"http://www.team.net/archive" target=3D=
"_blank">http://www.team.net/archive</a><br>Forums: <a href=3D"http://www.t=
eam.net/forums" target=3D"_blank">http://www.team.net/forums</a><br>Unsubsc=
ribe/Manage: <a href=3D"http://autox.team.net/mailman/options/fot/duncan.ch=
[email-masked]" target=3D"_blank">http://autox.team.net/mailman/<wbr>op=
tions/fot/duncan.charlton54@<wbr>gmail.com</a><br><br><br></div></blockquot=
e></div><br></div></div><br>______________________________<wbr>____________=
_____<br>
<a href=3D"mailto:[email-masked]">[email-masked]</a><br>
<br>
<a href=3D"http://www.fot-racing.com" rel=3D"noreferrer" target=3D"_blank">=
http://www.fot-racing.com</a><br>
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et=3D"_blank">http://www.team.net/donate.<wbr>html</a><br>
Archive: <a href=3D"http://www.team.net/archive" rel=3D"noreferrer" target=
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Forums: <a href=3D"http://www.team.net/forums" rel=3D"noreferrer" target=3D=
"_blank">http://www.team.net/forums</a><br>
[email-masked]" rel=3D"noreferrer" target=3D"_blank">http://autox.team.n=
et/mailman/<wbr>options/fot/johnstydo@gmail.<wbr>com</a><br>
<br>
<br>
<br></blockquote></div><br></div>

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From: Brian Dennis <[email-masked]>
Date: Wed, 19 Oct 2016 00:19:30 +0000 (UTC)

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So, just to follow up. Thanks for those that replied.=C2=A0
As for the fluctuation, Kas mentioned possible debris in the pressure relie=
f valve. I cleaned it out although I did not find any debris.=C2=A0
I also replaced the spring with a stock spring. I had been running a HD spr=
ing.=C2=A0
Result, steady pressure.
Still had excessive pressure. Played with various copper washers with diffe=
rent thicknesses. Was able to get 45psi at hot idle 1500rpm and 95psi at ho=
t 6000 rpm. =C2=A0
Off to the races we go. New motor was good for first in class up Mt. Philo =
VT.
Thanks again.Brian

=20
      From: John Styduhar <[email-masked]>
 To: Duncan Charlton <[email-masked]>=20
Cc: Brian <[email-masked]>; FOT <[email-masked]>
 Sent: Monday, October 10, 2016 8:47 PM
 Subject: Re: [Fot] Gt6 oil pressure?
  =20
Are you running an accusump and have you preloaded the pressure setting cor=
rectly?=C2=A0 Incorrect setup will cause the oil pressure to fluctuate.
On Thu, Oct 6, 2016 at 1:28 PM, Duncan Charlton <[email-masked]=
m> wrote:

Brian,
My first guess is a sticky oil pressure relief valve that loosens up once w=
arm.=C2=A0 I=E2=80=99m not sure how you could test it, but perhaps you can =
swap in a different one.
Duncan CharltonElgin, Texas USA

On Oct 5, 2016, at 6:10 PM, Brian <[email-masked]> wrote:
New motor. 12:1 comp. At cold start up oil pressure fluctuates from 20-60ps=
i. Once warm (approx 180 deg Fahrenheit) pressure is consistent with rpm in=
crease. At idle hot is 60psi. Upwards of 100psi at 5000rpm. 5-7k is were it=
 will rev during race condition.=20
Now FYI - this is the first motor by the book with precise measures. Previo=
usly it's been "well this is what I can afford" . Getting older and get tir=
ed working the wheel so thought I'd try something a little different.=20
My concern is the cold oil psi fluctuation and the higher than previous hig=
h rev psi.

Thoughts please. Before I tow it to northern VT for hill climb next week.
Thanks,=20
Brian=20
Foster, RI
______________________________ _________________
[email-masked]

ton54@ gmail.com

______________________________ _________________
[email-masked]

ail. com

  =20
=20
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<html><head></head><body><div style=3D"color:#000; background-color:#fff; f=
ont-family:HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, =
sans-serif;font-size:16px"><div id=3D"yui_3_16_0_ym19_1_1476832926413_49841=
"><span id=3D"yui_3_16_0_ym19_1_1476832926413_49950">So, just to follow up.=
 Thanks for those that replied.&nbsp;</span></div><div id=3D"yui_3_16_0_ym1=
9_1_1476832926413_49841"><span><br></span></div><div id=3D"yui_3_16_0_ym19_=
1_1476832926413_49841"><span id=3D"yui_3_16_0_ym19_1_1476832926413_49948">A=
s for the fluctuation, Kas mentioned possible debris in the pressure relief=
 valve. I cleaned it out although I did not find any debris.&nbsp;</span></=
div><div id=3D"yui_3_16_0_ym19_1_1476832926413_49841"><span><br></span></di=
v><div id=3D"yui_3_16_0_ym19_1_1476832926413_49841" dir=3D"ltr"><span id=3D=
"yui_3_16_0_ym19_1_1476832926413_50425">I also replaced the spring with a s=
tock spring. I had been running a HD spring.&nbsp;</span></div><div id=3D"y=
ui_3_16_0_ym19_1_1476832926413_49841" dir=3D"ltr"><span><br></span></div><d=
iv id=3D"yui_3_16_0_ym19_1_1476832926413_49841" dir=3D"ltr"><span>Result, s=
teady pressure.</span></div><div id=3D"yui_3_16_0_ym19_1_1476832926413_4984=
1" dir=3D"ltr"><span><br></span></div><div id=3D"yui_3_16_0_ym19_1_14768329=
26413_49841" dir=3D"ltr"><span id=3D"yui_3_16_0_ym19_1_1476832926413_50426"=
>Still had excessive pressure. Played with various copper washers with diff=
erent thicknesses. Was able to get 45psi at hot idle 1500rpm and 95psi at h=
ot 6000 rpm. &nbsp;</span></div><div class=3D"qtdSeparateBR" id=3D"yui_3_16=
_0_ym19_1_1476832926413_49816"><br></div><div class=3D"qtdSeparateBR" id=3D=
"yui_3_16_0_ym19_1_1476832926413_49816">Off to the races we go. New motor w=
as good for first in class up Mt. Philo VT.</div><div class=3D"qtdSeparateB=
R" id=3D"yui_3_16_0_ym19_1_1476832926413_49816"><br></div><div class=3D"qtd=
SeparateBR" id=3D"yui_3_16_0_ym19_1_1476832926413_49816">Thanks again.</div=
><div class=3D"qtdSeparateBR" id=3D"yui_3_16_0_ym19_1_1476832926413_49816">=
Brian<br><br></div><div class=3D"yahoo_quoted" id=3D"yui_3_16_0_ym19_1_1476=
832926413_49846" style=3D"display: block;"> <blockquote style=3D"border-lef=
t: 2px solid rgb(16, 16, 255); margin-left: 5px; margin-top: 5px; padding-l=
eft: 5px;" id=3D"yui_3_16_0_ym19_1_1476832926413_49845"> <div style=3D"font=
-family: HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sa=
ns-serif; font-size: 16px;" id=3D"yui_3_16_0_ym19_1_1476832926413_49844"> <=
div style=3D"font-family: HelveticaNeue, Helvetica Neue, Helvetica, Arial, =
Lucida Grande, sans-serif; font-size: 16px;" id=3D"yui_3_16_0_ym19_1_147683=
2926413_49843"> <div dir=3D"ltr" id=3D"yui_3_16_0_ym19_1_1476832926413_4984=
2"> <font size=3D"2" face=3D"Arial" id=3D"yui_3_16_0_ym19_1_1476832926413_4=
9848"> <hr size=3D"1" id=3D"yui_3_16_0_ym19_1_1476832926413_49847"> <b><spa=
n style=3D"font-weight:bold;">From:</span></b> John Styduhar &lt;johnstydo@=
gmail.com&gt;<br> <b><span style=3D"font-weight: bold;">To:</span></b> Dunc=
an Charlton &lt;[email-masked]&gt; <br><b><span style=3D"font-=
weight: bold;">Cc:</span></b> Brian &lt;[email-masked]&gt;; FOT &lt;=
[email-masked]&gt;<br> <b><span style=3D"font-weight: bold;">Sent:</spa=
n></b> Monday, October 10, 2016 8:47 PM<br> <b><span style=3D"font-weight: =
bold;">Subject:</span></b> Re: [Fot] Gt6 oil pressure?<br> </font> </div> <=
div class=3D"y_msg_container"><br><div id=3D"yiv1344518869"><div><div dir=
=3D"ltr"><div class=3D"yiv1344518869gmail_default" style=3D"font-size:small=
;">Are you running an accusump and have you preloaded the pressure setting =
correctly?&nbsp; Incorrect setup will cause the oil pressure to fluctuate.<=
/div></div><div class=3D"yiv1344518869gmail_extra"><br clear=3D"none"><div =
class=3D"yiv1344518869gmail_quote">On Thu, Oct 6, 2016 at 1:28 PM, Duncan C=
harlton <span dir=3D"ltr">&lt;<a rel=3D"nofollow" shape=3D"rect" ymailto=3D=
"mailto:[email-masked]" target=3D"_blank" href=3D"mailto:dunca=
[email-masked]">[email-masked]</a>&gt;</span> wrote:<b=
r clear=3D"none"><blockquote class=3D"yiv1344518869gmail_quote" style=3D"ma=
rgin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;"><div class=3D=
"yiv1344518869yqt3215344883" id=3D"yiv1344518869yqt74656"><div style=3D"wor=
d-wrap:break-word;">Brian,<div><br clear=3D"none"></div><div>My first guess=
 is a sticky oil pressure relief valve that loosens up once warm.&nbsp; I=
=E2=80=99m not sure how you could test it, but perhaps you can swap in a di=
fferent one.</div><div><br clear=3D"none"><div>
<div>Duncan Charlton</div><div>Elgin, Texas USA</div><div><br clear=3D"none=
"></div><br clear=3D"none" class=3D"yiv1344518869m_-7453972624223047048Appl=
e-interchange-newline">

</div>
<br clear=3D"none"><div><blockquote type=3D"cite"><span class=3D"yiv1344518=
869"></span><div>On Oct 5, 2016, at 6:10 PM, Brian &lt;<a rel=3D"nofollow" =
shape=3D"rect" ymailto=3D"mailto:[email-masked]" target=3D"_blank" h=
ref=3D"mailto:[email-masked]">[email-masked]</a>&gt; wrote:</=
div><br clear=3D"none" class=3D"yiv1344518869m_-7453972624223047048Apple-in=
terchange-newline"><div><span class=3D"yiv1344518869"></span><div><div><div=
 style=3D"font-family:Calibri, sans-serif;font-size:11pt;">New motor. 12:1 =
comp. At cold start up oil pressure fluctuates from 20-60psi. Once warm (ap=
prox 180 deg Fahrenheit) pressure is consistent with rpm increase. At idle =
hot is 60psi. Upwards of 100psi at 5000rpm. 5-7k is were it will rev during=
 race condition. <br clear=3D"none">Now FYI - this is the first motor by th=
e book with precise measures. Previously it's been "well this is what I can=
 afford" . Getting older and get tired working the wheel so thought I'd try=
 something a little different. <br clear=3D"none">My concern is the cold oi=
l psi fluctuation and the higher than previous high rev psi.<br clear=3D"no=
ne"><br clear=3D"none">Thoughts please. Before I tow it to northern VT for =
hill climb next week.<br clear=3D"none">Thanks, <br clear=3D"none">Brian <b=
r clear=3D"none">Foster, RI<br clear=3D"none"></div></div></div>___________=
___________________ _________________<br clear=3D"none"><a rel=3D"nofollow"=
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