LS7 heads on 15*pistons

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Sep 24, 2005 | 04:54 PM

Greg Fell

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From: Morton IL

LS7 heads on 15*pistons

I have a 422, 4.100 x 4.00. The valve reliefs are 15*.

If I run a cam with smaller lift, would I be able to use the LS7 heads?

LS7 heads + medium size cam would probably spank a set of 15* heads with a nasty cam.

Does anyone have prices on a 'top end' kit yet?

Sep 28, 2005 | 06:47 PM

Greg Fell

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From: Morton IL

I guess I could also run a 114 lsa, which I am going to anyway as I may spray.

Anyone else?

Oct 5, 2005 | 06:27 PM

Greg Fell

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From: Morton IL

Anyone? I've gotten feedback both ways.

Oct 6, 2005 | 02:13 AM

jhong321

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From: bayarea

i would think your CR would be very low with -15 pistons and a ls7 head that has a 72cc ?(i think) i did the calculation and got 9.6:1 are you planing to go fi ?

Oct 6, 2005 | 08:15 AM

Craig@ETPerformance

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You will be able to run those heads without a problem. Just check piston to valve. Even though the valve pockets are not in the right spot on the pistons the valve stands up more.

Oct 6, 2005 | 08:17 AM

Greg Fell

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From: Morton IL

Quote:

Originally Posted by jhong321

i would think your CR would be very low with -15 pistons and a ls7 head that has a 72cc ?(i think) i did the calculation and got 9.6:1 are you planing to go fi ?

They are 70 cc. I'll mill them down to 65-66cc or so, to keep a 11.5ish:1 CR.

They are -7cc reliefs, not -15cc. The valve reliefs are for 15* heads.

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