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<DIV><FONT face=Arial>I used Minisport roller rockers bought cheap in the
2008-9 crash. I no longer remember, but they probably are 1.5
(red), and I also used a "warm" Elgin cam that came in a box of
parts.</FONT></DIV>
<DIV><FONT face=Arial></FONT> </DIV>
<DIV><SPAN>Where <A
href="http://www.spridgetmania.com/part/C-AHT436/Roller-Tipped-15-Ratio-Rockers-Aluminum">higher
ratio rockers</A> are to be used, the required valve clearance can then be
assessed using this simple formula. For instance when using 1.5 rockers, you
obviously need to multiply the cam/follower clearance by 1.5. So 0.010-in x 1.5
gives 0.015-in for standard/mild cams and 0.012-in x 1.5 gives 0.018-in for
race/more-modified cams. Interestingly, most re-profiled performance cams
generally have a suggested valve clearance of 0.016-in with standard ratio
rockers. To assess required valve clearance where higher ratio rockers are used
simply work it backwards and multiply by the higher ratio. This works out as
0.016-in divided by 1.25 = 0.0128, then x 1.5 = 0.0192" - or 0.019" at the
valve.</SPAN></DIV>
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<DIV style="FONT: 10pt arial">----- Original Message ----- </DIV>
<DIV
style="FONT: 10pt arial; BACKGROUND: #e4e4e4; font-color: black"><B>From:</B>
<A title=rrengineer.mike@att.net href="mailto:rrengineer.mike@att.net">Michael
MacLean</A> </DIV>
<DIV style="FONT: 10pt arial"><B>To:</B> <A title=refisk@chartermi.net
href="mailto:refisk@chartermi.net">Rick Fisk</A> ; <A
title=mdrowe@optonline.net href="mailto:mdrowe@optonline.net">Michael Rowe</A>
</DIV>
<DIV style="FONT: 10pt arial"><B>Cc:</B> <A title=spridgets@autox.team.net
href="mailto:spridgets@autox.team.net">Spridgets</A> </DIV>
<DIV style="FONT: 10pt arial"><B>Sent:</B> Saturday, October 31, 2015 4:49
PM</DIV>
<DIV style="FONT: 10pt arial"><B>Subject:</B> Re: [Spridgets] rocker
clearance</DIV>
<DIV><BR></DIV>
<DIV
style="BACKGROUND-COLOR: #fff; FONT-FAMILY: times new roman, new york, times, serif; COLOR: #000; FONT-SIZE: 16px">
<DIV id=yui_3_16_0_1_1446323015003_17729>How about when you have 1.5 rocker
arms? Drove the Bugeye around yesterday. Runs great, still blue
smoke on acceleration on a recent rebuild. At leat 1000 miles since
rebuild. I'm afraid the rings never seated properly. Not sure of
the cylinder wall surface during the rebuild as I did not so that part of
it.<BR></DIV>
<DIV dir=ltr id=yui_3_16_0_1_1446323015003_17730>Mike MacLean<BR></DIV>
<DIV id=yui_3_16_0_1_1446323015003_17731><SPAN></SPAN></DIV><BR>
<DIV class=qtdSeparateBR><BR><BR></DIV>
<DIV style="DISPLAY: block" class=yahoo_quoted>
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style="FONT-FAMILY: times new roman, new york, times, serif; FONT-SIZE: 16px">
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style="FONT-FAMILY: HelveticaNeue, Helvetica Neue, Helvetica, Arial, Lucida Grande, sans-serif; FONT-SIZE: 16px">
<DIV dir=ltr><FONT size=2 face=Arial>On Saturday, October 31, 2015 1:26 PM,
Rick Fisk via Spridgets <<A
href="mailto:spridgets@autox.team.net">spridgets@autox.team.net</A>>
wrote:<BR></FONT></DIV>
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<DIV id=yiv3068736433>
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<DIV>The 0.029 in. spec is a whole different thing used when you are
assembling the engine. If your engine is together and you just want to
set the valve clearance it should be 0.012 in. set cold.<BR clear=none><BR
clear=none>Sent from my keyboard</DIV>
<DIV id=yiv3068736433yqt61360 class=yiv3068736433yqt3461902488>
<DIV><BR clear=none>On Oct 31, 2015, at 4:06 PM, Michael Rowe via Spridgets
<<A href="mailto:spridgets@autox.team.net" shape=rect rel=nofollow
target=_blank
ymailto="mailto:spridgets@autox.team.net">spridgets@autox.team.net</A>>
wrote:<BR clear=none><BR clear=none></DIV>
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<DIV></DIV></BLOCKQUOTE></DIV></DIV>
<DIV id=yiv3068736433yqt64797 class=yiv3068736433yqt3461902488>
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</DIV>
<DIV>
<DIV id=yiv3068736433yqt61805 class=yiv3068736433yqt3461902488>
<DIV><FONT face=Arial>New 1275 engine.</FONT></DIV>
<DIV><FONT face=Arial>Haynes says "Rocker clearance, timing only
= 0.029 in.</FONT></DIV>
<DIV><FONT face=Arial>My mechanic/tutor says, "that is twice what it should
be."</FONT></DIV>
<DIV><FONT face=Arial>Bentley says:</FONT></DIV>
<DIV><FONT face=Arial>Rocker clearance: Running (Standard) = 0.012 in.
cold</FONT></DIV>
<DIV><FONT face=Arial>
Running (competition work) = 0.015
in.</FONT></DIV>
<DIV><FONT
face=Arial>
timing = 0.029 in.</FONT></DIV>
<DIV><FONT face=Arial>Online sites agree on = .012 in.
cold.</FONT></DIV>
<DIV><FONT face=Arial></FONT> </DIV>
<DIV><FONT face=Arial>So what is the 0.029 in. for?</FONT></DIV>
<DIV><FONT face=Arial></FONT> </DIV>
<DIV><FONT face=Arial>Michael Rowe</FONT></DIV></DIV>
<BLOCKQUOTE type="cite">
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