What would it take to make 1.44 lbs-ft per cid ?

273 said

I totally agree.

I'm just trying to figure out what it takes to build in the higher tq:cid ranges, cause ultimately I'm toying with the idea of building a mid/high 11's (don't want roll bar) 273 for my Valiant and like make peak under 7,000 rpms, more like 6,500 rpms if I can. Right now I got 360 380 hp crate.



Here's a 273/292 that makes 473 hp @ 7,900 rpm , but only makes 334 lbs-ft @ 7,100 rpm
Tq:cid is only 1.14 lbs-ft so lots of room for improvement.

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As per Darin Morgan; velocity, velocity, velocity.
In addition, any porting should also involve increasing swirl. This is mixture motion. A tight quench like 0.025" is another aid. Combine that with Somender Singh grooves to direct compression air/fuel coming out of the quench to aid swirl and toward the spark plug. Brian Salter described this in a Live with David Vizard and Andy Woods. Building as high compression in as possible and use water injection to control detonation. Distilled water with 2% water soluble oil. Methanol is to prevent freezing.