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<div class="moz-cite-prefix">Not sure about lifter bore angle on wet
liner engines, but Spit/TR6 variants were on a 4.5 degree angle.
Ted<br>
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On 11/17/2017 7:49 AM, Jerry Van Vlack via Fot wrote:<br>
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<div>The discussion on lifters is of interest to me. I’d like
to see some independent verification of the recent
statement regarding lifter bore being at some angle relative
to the cam bore. </div>
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<div>What I believe is the bores are perpendicular to the cam
bore but offset from lobe centerline to facilitate lifter
rotation. I recently did some research on cams and lifters
for the wet sleeve engines and have concluded that factory
stock cams and lifters are ground flat and lifter bores are
offset to facilitate lifter rotation. My bases for the
conclusion is via verification at a cam grinder that the
stock lobes (and my Kastner D cam) are ground flat by
installing several OE cams between centers in the cam
grinders equipment and sweeping a dial indicator across the
lobes and the heals which verified dead flat grind. </div>
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<div>With regard to lifters I took several used but known to
be OE lifters that were in good shape and placed them end to
end, there was no rocking and they mated as though they were
lapped together. I did the same with new lifters from a well
know supplier and placed them end to end and they rocked
showing a slight radius. These radiused lifters combined
with a flat cam are not matched for lifter rotation and can
lead to rapid cam and lifter wear. If using a cam that has a
taper ground lobe with the radiused lifters you will get
rotation. </div>
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<div>I have no idea what effect on wear an offset lifter bore
has with a tapered lobe cam and radiused lifter. Maybe
someone else can comment on that.</div>
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<div>Perhaps this is old news to many racers but I suspect
that some engines have been built with mismatched cams and
lifters that led to rapid cam and lifter wear which was
wrongly blamed on oil and break-in procedures.</div>
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<div>JVV</div>
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<div style="font-color: black"><b>From:</b> <a
title="fot@autox.team.net" moz-do-not-send="true">Mike
Harmuth via Fot</a> </div>
<div><b>Sent:</b> Thursday, November 16, 2017 8:47 AM</div>
<div><b>To:</b> <a title="fot@autox.team.net"
moz-do-not-send="true">FoTTriumph</a> </div>
<div><b>Subject:</b> Re: [Fot] Peugot lifters 504</div>
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<div>"And they've been used in at least one 1296
Spitfire engine, where they're much larger in
diameter than stock."<br>
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Now you have my interest, I have a small block 1296
block with worn lifter bores and my engine builder
couldn't find a slightly larger lifter. I'm guessing
he didn't look at a Peugeot parts catalog. Does anyone
have a lifter part number or a spec so I can
investigate bringing this block back from the dead? It
was mentioned that the TR bores holes are not parallel
to the block, are the small journal 1296 bore the
same?<br>
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thanks<br>
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mike h<br>
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<pre class="moz-signature" cols="72">--
Ted Schumacher
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