i'm a Compression Ratio "Freak"
either i misunderstood KillaCamaro's CR question
or he misunderstood my answer ?
i definetly don't remember advising him
that there would be no more HP and TQ to gain
from increasing CR !!!
i would advise him to run at least 14:1 CR and upwards
we've tried as high as 16.7 to 16.8:1 on Craigs A/ND
and we currently run 16.2:1 CR on Jeff Colletta's NPS BBC632 1322HP / 1640's on Legal NOS jet
Video of Jeff_Colletta_BC632_1316-HP - Photobucket - Video and Image Hosting
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both our SBC434's are'nt too far away from each other in Part's Specs,
but i'm wondering why Killa's 434 is Peaking so low in RPM ??
with the same Dart Pro-1's ?
it seems there's a severe CSA speed problem !
the Dart Pro-1's on Danny's 434 are the best i can do
without welding pushrod areas up + widening the pushrod pinch.
We're making Peak HP @ 7500 and Peak TQ @ 6300 RPM
there's more HP there welding those Heads
and on Dany's 434 it really need a pair of larger Headers,
but we used what he already had.