12 Second N/A Slant 6?

273 said

I did a CR bump to 13.5 and bump the carb from 600 to an 800 and got 300hp out of both 256 and 262 but 270 went to 290hp, 256 cam would be my choice just has a way better torque curve with very little loss in top end 6000-7000rpm

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CR might well be in the 13.5:1 range if I squeeze down the quench to .040".

I agree on the 256.

What was the TQ for the various cams @ 3000, 3500 & 4000 RPM?

I want max HP @ 6000 RPM W/a flat HP curve to 6500 so I can wind the gears for maximum TQ/HP @ the recovery RPM after the shift.

I also like to go about 200-300 RPM past peak HP in the traps. Get the HP on the track ASAP W/O running out of breath @ the end.

Maximum TQ @ 4500 RPM & the best comparative TQ values @ 3500 & 4000 RPM.