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-   -   BB Chev HP (https://classracer.com/classforum/showthread.php?t=75974)

HP HUNTER 04-13-2020 09:55 PM
Re: BB Chev HP
 
Quote:
Originally Posted by dano (Post 612138)
any suggestions on baseline hp needed in a or b/sa?

132 mph @ 3400=602 hp
133 mph @ 3400=616 hp
134 mph @ 3400=630 hp

132 mph @ 3600=638 hp
133 mph @ 3600=652 hp
134 mph @ 3600=682 hp

GTX JOHN 04-13-2020 09:59 PM
Re: BB Chev HP
 
There is only one Steve Wann.

I remember him wandering
about the pits when he probably was
around 13 telling everyone how he was
kick our butts.

AND sure enough for the last 30 +years.....He certainly has
done that!!

B Parker 04-13-2020 10:00 PM
Re: BB Chev HP
 
Quote:
Originally Posted by HP HUNTER (Post 612210)
132 mph @ 3400=602 hp
133 mph @ 3400=616 hp
134 mph @ 3400=630 hp

132 mph @ 3600=638 hp
133 mph @ 3600=652 hp
134 mph @ 3600=682 hp
You will need to add 200 lbs to that number. sorry didn't catch your second set of numbers
BP

HP HUNTER 04-13-2020 10:08 PM
Re: BB Chev HP
 
Quote:
Originally Posted by Frank Castros (Post 612204)
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 04-14-2020 06:39 AM
Re: BB Chev HP
 
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 04-14-2020 08:09 AM
Re: BB Chev HP
 
Quote:
Originally Posted by Frank Castros (Post 612218)
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 04-14-2020 09:22 AM
Re: BB Chev HP
 
Approximately 850.

HP HUNTER 04-14-2020 09:31 AM
Re: BB Chev HP
 
Quote:
Originally Posted by Frank Castros (Post 612224)
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.

Mike Mans 04-14-2020 09:48 AM
Re: BB Chev HP
 
Quote:
Originally Posted by B Parker (Post 612196)
Mike if you have only 587 you would be in trouble running most of the fast A an B cars. Not that I would know but I would guess your second number of 645 would be in the ball park. Barry
I completely agree with you there. I figured the 587 would put you around an -.80 under car, give or take a little. If a guy wants to be competitive in a heads up race against the top dogs - you'll need that 645 range. Just my perspective.

Frank Castros 04-14-2020 10:23 AM
Re: BB Chev HP
 
Quote:
Originally Posted by Mike Mans (Post 612226)
I completely agree with you there. I figured the 587 would put you around an -.80 under car, give or take a little. If a guy wants to be competitive in a heads up race against the top dogs - you'll need that 645 range. Just my perspective.
None of those "top dogs" will run it 1320, to protect the number.
Maybe Scott Gove might.


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