BB Chev HP

[Frank Castros]

Would I be off base if I believe the best 1969 396/375 Camaros that run aluminum heads and are able to run better than -1.20 (and they can) are making north of 700 HP?
Do the math.

[HP HUNTER]

Originally Posted by Frank Castros

Would I be off base if I believe the best 1969 396/375 Camaros that run aluminum heads and are able to run better than -1.20 (and they can) are making north of 700 HP?
Do the math.

No, I know a certain A/S that ran 136 @ Pomona (1000) feet, it didn't make close to 700 HP. What helps a 375/396 is how it carries the power past peak, average HP.

[Frank Castros]

HP factor; 405 with aluminum heads
8.5 lbs in B/SA = 3,442.5 + 170 = 3,612.50
11.25 index - 1.4 = 9.85

The Elapsed Time (ET) Method
This method uses the vehicle weight and the elapsed time (ET) to finish a quarter mile (402.3 meters) on the formula of Horsepower = Weight (ET/5.825)3.

747 horsepower.

[HP HUNTER]

Originally Posted by Frank Castros

HP factor; 405 with aluminum heads
8.5 lbs in B/SA = 3,442.5 + 170 = 3,612.50
11.25 index - 1.4 = 9.85

The Elapsed Time (ET) Method
This method uses the vehicle weight and the elapsed time (ET) to finish a quarter mile (402.3 meters) on the formula of Horsepower = Weight (ET/5.825)3.

747 horsepower.

9.29 @ 142.24 @ 3600 how much power using your formula?

[Frank Castros]

Approximately 850.

[HP HUNTER]

Originally Posted by Frank Castros

Approximately 850.

Could you look into the possibility of HP determined by MPH over 1320, this seems to align with my dyno testing and others over the years. A perfect example of this would be over on the Number1GMfan thread.

[Stan Weiss]

Originally Posted by HP HUNTER

9.29 @ 142.24 @ 3600 how much power using your formula?

While vehicle aerodynamics can cause this number to go up or down I think a good middle ground is 710 HP. With track weather BP=29.92 VP=0 Temp=60

Stan

[Stan Weiss]

Originally Posted by HP HUNTER

9.29 @ 142.24 @ 3600 how much power using your formula?

Originally Posted by Stan Weiss

While vehicle aerodynamics can cause this number to go up or down I think a good middle ground is 710 HP. With track weather BP=29.92 VP=0 Temp=60

Stan

You never posted up how much HP it took.


Stan

[Bob F]

9.03 @143. 3400lb 1970 Buick Gs great air @ Cecil co.
Made 830hp Superflow dyno

[HP HUNTER]

Originally Posted by Stan Weiss

You never posted up how much HP it took.


Stan

Dyno HP 29.92 60 degrees dry air was 774 HP SF 901. Measured HP @ 6200 feet elevation was 564, 24.00 baro. A/S 396 375 dynos @ 620s 29.92 baro 60 degrees dry air and runs 9.80s, but have run 135 MPH in a 29.00 baro, SF 901






71 Camaro full interior NA production BBC 3400 pounds, 146.4 MPH on traction control, 821 dyno HP. 8 sec car.