Aftermarket valve spring discussion

[907DAVE]

I think the ratio's are close to 1.6, so multiple that by .2535 and you get roughly .40 lift.

 

[Cota]

So where do the Hypermax high rev valve springs fit in or did I miss it?

 

[Tim @ P.I.S.]

So where do the Hypermax high rev valve springs fit in or did I miss it?

This was posted in the past by Machinist......

Numbers I got

Installed height is 1.800-1.810, subtracting the .045" thick integral shim/seal gives us an effective installed height of ~1.760" with all stock components.

New Stock spring

110# seat pressure
250# open @ .410"
.070" to coil bind
~350lb/in spring rate

Comp 910

120# seat pressure
285# open @ .410"
.070" to coil bind
~400lb/in spring rate

Hypermax @ 1.615" installed

150# seat pressure
330# open @ .410"
.130" to coil bind
~440lb/in spring rate

 

[Cota]

Awsome, thanks, now I need to go back and reread this thread.

 

[JDub]

I would have to double check my notes, but that is about what the Crowers came out to also.

Our springs should be around 145. Ran them on every motor that has come out of the WOP shop since 2004. Ran them in the dragster which has seen 5200rpm multiple times, never an issue, WOP Race Cam and cryo treated stock rockers.

 

[Hotrodtractor]

I went ahead and moved the Hypermax injector discussion to here: http://powerstrokearmy.com/forums/showthread.php?t=11333

Both good discussions - but lets keep them separate.

 

[slim613]

anyone ever find out any more info on these im doin a build with 910 and 0.030 shims