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Valve Springs

Posted: Sun Mar 19, 2023 11:29 am
by Steve Simmons
For anyone who has installed a Crane Fast Road cam, did you go with heavier springs? I'm considering putting one in an XPEG, which I believe already has slightly heavier springs than XPAG. The question is really whether or not the stock XPEG springs are heavy enough for the cam. This is in a TC that is driven hard at times, but not raced.

Re: Valve Springs

Posted: Sun Mar 19, 2023 2:29 pm
by Duncan M
Starting on page 36 of the MFK Wood paper in the Supertuning section he talks about both 1.25 and 1.5 engines. For the XPEG he mentions a few different cams, but it looks like he starts suggesting stiffer springs right at 10:1 C.R.

Re: Valve Springs

Posted: Thu Mar 23, 2023 3:04 am
by searunner
Hi Steve
on My 0433 MG TC
from Peter EDNEY,
I have a Fast Road Cam 030
and Strong Springs set 050
BUT if remember well under the Rocker Pedestal I must put 4 Shim set MOSS 433-128
the alternative was the short PUSH ROD 433-335