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<p>I guess my point in generating some "traffic" is best expressed
by Mr. Lawrence. With a single cam acting on the valve timing, one
can set it close to factory or deviate a couple degrees advanced
or retarded for low end torque or high rpm breathing. It is still
a trade off versus a twin cam head where both can be affected and
gains can be easily (?) obtained for both instances he states. Not
too sure we all have easy access to a dyno. These old long stroke
6/4's were designed for grunt. That would be the wise choice. They
don't like to be spun up much, then the Welch crank would be
necessary. $$ dave<br>
</p>
<br>
<div class="moz-cite-prefix">On 7/7/2017 7:16 PM, WILLIAM B LAWRENCE
wrote:<br>
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<p>According to Iskendarian You can optimize cam timing either
to provide a boost in low end torque by advancing the timing
by up to 8 degrees or in high end power by retarding it a
similar amount. </p>
<p><br>
</p>
<p>Since I am looking for a low end boost and will rarely
exceed 3500 on the road I set mine 4 degrees in advance.</p>
<p><br>
</p>
<p>Waiting to see how it works out...</p>
<p><br>
</p>
<p>Bill Lawrence</p>
<p>BN1 #554</p>
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<div id="x_divRplyFwdMsg" dir="ltr"><font style="font-size:11pt"
face="Calibri, sans-serif" color="#000000"><b>From:</b>
Healeys <a class="moz-txt-link-rfc2396E" href="mailto:healeys-bounces@autox.team.net"><healeys-bounces@autox.team.net></a> on behalf of
Bob Spidell <a class="moz-txt-link-rfc2396E" href="mailto:bspidell@comcast.net"><bspidell@comcast.net></a><br>
<b>Sent:</b> Friday, July 7, 2017 8:43:58 PM<br>
<b>To:</b> <a class="moz-txt-link-abbreviated" href="mailto:healeys@autox.team.net">healeys@autox.team.net</a><br>
<b>Subject:</b> Re: [Healeys] Vernier timing gears</font>
<div> </div>
</div>
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<font size="2"><span style="font-size:10pt;">
<div class="PlainText">My builder said it took several degrees
of adjustment--dunno which
<br>
direction--to get my DWR1 cam dialed in to DW's specs.<br>
<br>
Bob<br>
<br>
<br>
On 7/7/2017 7:39 AM, David Porter wrote:<br>
> ...assuming that the gears and chain and tensioner are
up to snuff, <br>
> exactly what is the big benefit for vernier adjuster
when there is a <br>
> single cam acting on the valves.. dp<br>
><br>
><br>
> On 7/7/2017 4:05 AM, Chris Dimmock wrote:<br>
>> Hi Wayne,<br>
>> >From a quick internet search on the head
markings of your "aviation <br>
>> bolts" they are at best approx grade 5 (120 KSI)
equivalent, cad <br>
>> plated steel bolts. Nothing special. The Rollmaster
bolts you have <br>
>> shown look to me like grade 8 (150 KSI) unbrako
style cap head bolts.<br>
>> The Rollmaster Vernier timing kit tells you at
least 3 times (on the <br>
>> packaging, and in the instructions) to Locktite
these bolts.<br>
>> If I was going to change these bolts, I'd go up to
180 KSI ARP bolts, <br>
>> not down to grade 5 120 KSI bolts.<br>
>> Our Healey Club (AHOC NSW) sells the Rollmaster
Vernier kits and we <br>
>> have had no issues reported.<br>
>> Bob Spidell has recently had this timing set
installed in his newly <br>
>> rebuilt engine.<br>
>> Best<br>
>> Chris<br>
>><br>
>><br>
>><br>
>> Sent from my iPhone<br>
>>> On 6 Jul. 2017, at 1:43 am, Wayne
<a class="moz-txt-link-rfc2396E" href="mailto:waschu2@gmail.com"><waschu2@gmail.com></a> wrote:<br>
>>><br>
>>> Hello,<br>
>>><br>
>>> I am getting back to my Healey 3000
engine rebuild after <br>
>>> two years. I bought the Roller master vernier
timing gear set from <br>
>>> Moss at that time. I have previously used the
Roller Master gear <br>
>>> set with multiple key ways to adjust the cam
timing with no problems <br>
>>> on other rebuilds. What I don't like about this
set is that the cap <br>
>>> screws used to clamp the vernier gear to the
hub are not very <br>
>>> robust. Working in aviation I have AN-4 bolts
that I can replace the <br>
>>> cap screws with and safety wire them to prevent
slippage. Has <br>
>>> anyone using this kit had problems? I could
keep the cap screws and <br>
>>> Loctite them. This is a street car, not a race
car. Pictures are one <br>
>>> bolt installed and the hardware side by side.<br>
>>><br>
>>> Wayne<br>
>>><br>
>>><br>
>><br>
>><br>
>><br>
><br>
<br>
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<pre wrap="">_______________________________________________
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<br>
<div class="moz-signature">-- <br>
Dave Porter
Porter Custom Bicycles
2909 Arno St. NE
Albuquerque, NM 87107
505-352-1378
Go HERE: my world <a class="moz-txt-link-abbreviated" href="http://www.porterbikes.com/">www.porterbikes.com/</a>
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