On Fri, 12 Sep 1997 00:30:02, -0500 GDWF22A(at)prodigy.com (MR RICHARD T
TRENK SR) writes:
>-----------------------
>Jarrid: I shall await with interest, your crower cam data.
I am at home now, but cant find the crower booklet.
I have another cam+book at a friends shop, so I'll see about getting the
info
over the weekend.
>about "concave" but then quote that the lifter is ground to be .002"
>high
>in the center. This would of course NOT be a concave surface but
>rather it
>is a "convex" surface. Yes..some lifters are ground with a large
This is correct "convex" my appologies.
New lifters in my garage show the convex function.
I would need a drop gauge to measure it, which I dont have.
>You mention hvaing to make many adjustments on a rebuilt engine. I
>NEVER
>have had this happen in all the years I rebuilt these engines. Why
>you have such a situation is most unusual I think.
My cam is a custom 275 intake, 285 exhaust with no queting ramps.
I have carefully set the lash to .008 and .010 brutally hot.
The motor sounds quietest with these specs, as the lash doesnt
contribute heavily to the engine noise.
As the valve train broke in, the noise intensified.
Carefull inspection and readjustment has shown all to be in order,
and the lash is found to be around .015.
After adjustment, all sounded reasonable again.
After the new cam was installed, the valves were initially adjusted cold,
adjusted again hot, and again hot after 500 miles or so.
The cam now has 2000 or so miles, and is begining to clickety clack
again. It has been progressing slowly, so it sounds like one more
adjustment ought to do it.
This is not really unusual I think, but rather shows a tough compromise
between a fragile adjustment and unwanted tappet clatter.
>You mention $150 to harden lifters and rockers.......this sounds
>strange as
>the rockers are forged steel and the basic alloy of the steel gives
>them
>their desired hardness, no flame or quench or case hardening is ever
>required at the arm tip. I suggest you stop this waste of money.
The $150 was rediculous, I bought new parts instead.
The rockers may be steel, but they are heat treated at least on the tips.
My old set of rockers has two that broke through the surface, and then
wore a stem groove very rapidly.
>BTW, this car uses a forged steel crank not some cheap cast iron
>crank.
Hey, where did you get a forged 1725 crank?
Last heard Holbay would make you one for about $3000 USD.
$3000 to $5000 for a ~140 BHP Alpine motor is about correct
if you do the work yourself. This would not include the fancy crank.
Send me all your spares.
Jarrid Gross
This archive was generated by hypermail 2b30 : Tue Sep 05 2000 - 09:56:02 CDT