130 mph pass

Bill Dedman said

Ian,
The calculator I use http://www.wallaceracing.com/Calculators.htm says it takes 641 HP to push 3,550 pounds to a terminal speed of 130 MH in the quarter mile. I'm pretty sure that's rear wheel HP, too, so if we go with the rule-of-thumb approximation that rear wheel HP is 85 percent of flywheel HP, it would suggest that you're making in the neighborhood of 754 flywheel HP with that 360!

That's strong... :cheers:

Click to expand...

Bill,

The factory weight of a Plymouth Valiant Signet V8 (or a Valiant AP6 as we called them) is around 3000lbs.

That 641 HP that calculator result says is FLY wheel I reckon.

I recommend this site. http://www.stealth316.com/2-calc-hp-et-mph.htm

See where he talks about the way these formulas? They were first devised - using Crank HP

I think Ian's engine is making around 580 - 600 Fly wheel.

The easy way to check is against other known cars running the same MPH and what their engines dynoed at. -

MPH will tell the tale as they say....

On another thread, I posted a Buddies Twin Tubo 318 - it ran 132mph in a heavier 3500Lb aussie Charger - he made 507 on a rear wheel dyno = appx 630 Fw HP using 20% losses.

754 FWHP would be closer to low 9s -

Ian, maybe you could post some dyno figs if you have them?

- Sorry for the thread hijack - and its great to see another 10 sec SB engine builder in town!!