408 Compression ??'s
01-09-2006, 08:06 PM
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408 Compression ??'s Ok i have a 408 W/ AFR 225's that were milled to 69cc.
i have have to do some work to my car and i will be removing my heads and while there off i'm thinking about milling them another 30 Thou to get them to 63-64cc. How much will this help my compression with the large cam i have. Cam is 253-257 643/645 112+4. Is this worth it?
Thanks Shawn
i have have to do some work to my car and i will be removing my heads and while there off i'm thinking about milling them another 30 Thou to get them to 63-64cc. How much will this help my compression with the large cam i have. Cam is 253-257 643/645 112+4. Is this worth it?
Thanks Shawn
01-09-2006, 08:57 PM
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Originally Posted by destroyerSS
Ok i have a 408 W/ AFR 225's that were milled to 69cc.
i have have to do some work to my car and i will be removing my heads and while there off i'm thinking about milling them another 30 Thou to get them to 63-64cc. How much will this help my compression with the large cam i have. Cam is 253-257 643/645 112+4. Is this worth it?
Thanks Shawn
i have have to do some work to my car and i will be removing my heads and while there off i'm thinking about milling them another 30 Thou to get them to 63-64cc. How much will this help my compression with the large cam i have. Cam is 253-257 643/645 112+4. Is this worth it?
Thanks Shawn
01-09-2006, 09:42 PM
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Originally Posted by 67SS509
Milling .030 will lower your chamber size by 5cc or raise the static compression .68, assuming flat top pistons this should put you around 12 to 1 compression. With that much duration and 112LSA I would say do it. It will help your DCR and that's what makes a strong engine.