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Need help with 243 Heads and Compression

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Need help with 243 Heads and Compression

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Old

Jun 17, 2010 | 08:31 AM

#1

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Need help with 243 Heads and Compression

ok stock LS1 with stock ls1 heads is 10.5:1 compression.

when i switch to 243 heads what do i get?

and how much of the 243 heads do i have to mill to get 11.1:1 ( or real close) and if i mill that much will i have valve to piston problems?

thanks
D

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Jul 7, 2010 | 01:39 PM

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thunderstruck507

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bump, found this during my search and I'd like to know too

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Jul 7, 2010 | 01:57 PM

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the stock ls1 with ls1 heads is 10.1:1 with 243s it will bump up to 10.5:1. This thread has a lot of good info in it.

https://ls1tech.com/forums/advanced-...ume-vs-cr.html

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Jul 7, 2010 | 01:59 PM

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blackmagicturbo

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and 5.3s would be 11;1 ?

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111, 243, 243s, cc, compression, comprrssion, crompression, head, heads, ls1, mill, milled, milling, stock, whats

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