Choosing Valve Springs

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Jun 22, 2025 | 07:50 PM

#21

Z28.lui

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Quote:

Originally Posted by TurboBuick6

I would look at the PAC-1218X for the added seat load. rate is low enough at 313 that you will not have excessive nose pressures.

i have a GPI SS3 cam (233/253 duration and .646/.638 lift) came with 7.425 pushrods, and have caddy lifters. Im wondering if i can run .700 lift springs or .660 will do fine?

Jun 23, 2025 | 07:57 AM

#22

TurboBuick6

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Quote:

Originally Posted by Z28.lui

i have a GPI SS3 cam (233/253 duration and .646/.638 lift) came with 7.425 pushrods, and have caddy lifters. Im wondering if i can run .700 lift springs or .660 will do fine?

a 0.660" spring will work fine. You can also go with a PAC-1276X beehive too, assuming stock rockers.

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