Author Topic: PAC valve springs  (Read 494 times)

imca77

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PAC valve springs
« on: May 02, 2018, 06:37:49 PM »
can someone explain if I have a set of PAC valve spring on a motor,how are they able to check springs at tech and determine that they are in fact PAC springs,and not factory GM crate springs ? any tech guys out there that can explain this to me ? thanks.

m15mod

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Re: PAC valve springs
« Reply #1 on: May 05, 2018, 10:27:43 AM »
I haven't seen any to tell you 100% but here are a couple of things. Wire diameter, free length, surface finish, seat and open pressure.
Race hard or DIE!

sidebite

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Re: PAC valve springs
« Reply #2 on: May 15, 2018, 06:19:37 PM »
I hear they can tell right away because the color and texture is different than GM springs. Just buy the rated GM sets and change them often.