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Horsepower Estimates?

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Old Today, 10:04 AM   #21  
jb78L-82
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Originally Posted by cagotzmann View Post
I know guys like to get HP numbers, but I prefer 1/4 mile MPH This shows how everything is working. Its also more fun for the driver.

I use Max MPH instead of 1/4mile time because time requires perfect launch as MPH is not as dependent to perfect launch. (no wheel spin to get similar MPH)


Did you every get your car to the track ?
No I have not since I cannot seem to find time when I am not traveling for my work to really do much these days. I barely have time to just drive my cars

Based on Joe's numbers and build, I think I am fairly certain that the 425+ Gross HP number is very realistic but agree that track numbers are the only way to be confident in the numbers. Considering that Joe has less cam lift, with the Dart heads (which are great heads), and 9.7 compression with 1 5/8 inch headers and made 394 Gross HP and 413 gross torque and 326 RWHP/363 Gross TQ, I feel my 355 with CNC AFR's, 10.2 compression, .525 lift roller cam and 1 7/8 inch LTH headers should comfortable be @ 425+ Gross HP/ 440 Gross TQ and I have always guessed about 350-360 RWHP on a dyno, which is also spot on from my builder's guess based on his in shop dyno and his vast experience building motors and dynoing others as well.

My engine like Joe's was built for max mid range torque between 2,000-4,500 RPM (and it does BIG time) and pulls hard all the way to 6,000 RPM. The Howards roller cam operating range is 1,500-5,600 RPM and like joe's, I don't need to rev past 5,800 RPM...it's really perfectly sweet for a street engine with a 4 speed and 3.70 gears.

BTW Joe with the AFR's and 10.2 compression running 32 degrees total timing, my engine shows zero detonation on 89 octane which is what I use.

Last edited by jb78L-82; Today at 10:23 AM.
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