Search found 62 matches

by 430 6V
Mon 7. Feb 2011, 16:57
Forum: MEL Engine General Discussion
Topic: MEL Engine Series Combustion Chamber & Piston Design
Replies: 69
Views: 77577

Re: MEL Engine Series Combustion Chamber & Piston Design

The step pistons are indeed the best. No matter what the compression ratio I recommend the quench pad or "step" be at zero deck with a .040" head gasket. .020" in the hole if you use a .020" steel shim gasket. In theory it not only helps with squish and turbulance but allows you to run higher compre...
by 430 6V
Mon 7. Feb 2011, 16:47
Forum: MEL Engine General Discussion
Topic: 430 Merc runs 14.02 at 101.5, 420hp
Replies: 8
Views: 7072

Re: 430 Merc runs 14.02 at 101.5, 420hp

No cleaning up of the heads, they flow very well as they are. The race allows extra compression and Melvin likes compression. The chamber is a slow burn so best total timing is on the high side at 43 degrees. The 2.5" mandrel exhaust also helps.

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