Try Isky- but you will need to know what spring pressure your cam maker
requires at both open and closed positions. For example, my GT6 cam requires a
closed pressure of 62 lb and an open pressure with 1.55 rockers of 185 lb. My
machinist also tells me that the initial values of new springs will drop off
significantly after a few heat cycles. I'm assuming Isky and others will sell
you springs that will "end up" at the range you want, rather than start out
there, if in fact this machinist is correct.
On May 8, 2012, at 2:40 PM, Tim Murphy wrote:
The machinist doing the work on our cylinder head tells me that we only have
about 70 pounds of pressure on the seats. He thinks this is pretty low, in
his experience with other engines. He also asked if I had the assembled
height of the springs, i.e. how much compression when assembled to the head.
He usually has this spec and shims the spring to obtain the specified
height. Lastly, the alloy retainers are pretty beat up and the origin of
the springs are unknown and he thinks they look questionable. Who are the
suppliers of valve springs, retainers, keepers and spring seat hardened
washers for racing purposes?
Thanks,
Tim and Ryan
1961 TR4 #317
_______________________________________________
fot@autox.team.net
http://www.fot-racing.com
Donate: http://www.team.net/donate.html
Archive: http://www.team.net/archive
Forums: http://www.team.net/forums
Unsubscribe: http://autox.team.net/mailman/options/fot/sjanzen@me.com
_______________________________________________
fot@autox.team.net
http://www.fot-racing.com
Donate: http://www.team.net/donate.html
Archive: http://www.team.net/archive
Forums: http://www.team.net/forums
Unsubscribe: http://autox.team.net/mailman/options/fot/mharc@autox.team.net
|