Bbc hp est

Old 09-23-2012, 05:23 PM
  #1  
ejm
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Default Bbc hp est

454 .040 over kb hyp pistons 11:1 Chevy 781 heads 2.19 in 1.72 ex bowls blended 629 lift solid flat tappet cam eagle forged crank stock rods all balanced Holley single plane intake and a demon 850
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Old 09-23-2012, 06:35 PM
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fast75vega
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im gonna say 550-600ish
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Old 09-26-2012, 08:07 PM
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maxpower671
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Default Re: Bbc hp est

Originally Posted by ejm
454 .040 over kb hyp pistons 11:1 Chevy 781 heads 2.19 in 1.72 ex bowls blended 629 lift solid flat tappet cam eagle forged crank stock rods all balanced Holley single plane intake and a demon 850
-what's rest of the cam specs? duration, lobe sep?
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Old 09-27-2012, 02:45 PM
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ejm
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duration 306 @.050 260 lobe sep 110*
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Old 09-27-2012, 03:04 PM
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bixblk
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Default bbc hp estimate

I had a similar (but a stroker) set up, slightly less cam (both lift and duration), 489 inches
(4.25 stroke .030)with a 1050 dominator made 578 hp with a very nice flat torgue curve. It was a roller cam and rect port GM heads, and 10.4 to 1 compression.
good luck !
My guess is 540 ish
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Old 09-28-2012, 07:20 AM
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roadkill2
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It don't matter! You really don't care . .

"Horsepower" is one of two things. A measurement determined by testing the actual output with a Dynometer, or a term used at the Bar when trying to impress people who don't know any better . .

If you're a racer (or engine Builder) and build an engine for a specific purpose (Like Quarter Mile Drag racing, for lack of a better one) then ET is (or should be) your primary concern.

Doesn't matter whether you're racing heads up or Brackets, it's ET or the potential to get to that ET that you're concerned with . .

And, based upon both experience of yourself, or those who are relatively successful at the type of racing you're doing, ascertaining the build and it's potential results should be, literally, empirical . . .

The "Fine Tuning" for good results and engine longevity belong to the user . . . and still have little to do with the spoken word "Horsepower" . . .

Jus' sayin'
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Old 09-28-2012, 10:01 AM
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maxpower671
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Originally Posted by roadkill2
It don't matter! You really don't care . .

"Horsepower" is one of two things. A measurement determined by testing the actual output with a Dynometer, or a term used at the Bar when trying to impress people who don't know any better . .

If you're a racer (or engine Builder) and build an engine for a specific purpose (Like Quarter Mile Drag racing, for lack of a better one) then ET is (or should be) your primary concern.

Doesn't matter whether you're racing heads up or Brackets, it's ET or the potential to get to that ET that you're concerned with . .

And, based upon both experience of yourself, or those who are relatively successful at the type of racing you're doing, ascertaining the build and it's potential results should be, literally, empirical . . .

The "Fine Tuning" for good results and engine longevity belong to the user . . . and still have little to do with the spoken word "Horsepower" . . .

Jus' sayin'
x2! very true. build an efficient, reliable engine for your application and let the HP number fall where it falls
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Old 09-28-2012, 10:14 AM
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fast75vega
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Originally Posted by maxpower671
Originally Posted by roadkill2
It don't matter! You really don't care . .

"Horsepower" is one of two things. A measurement determined by testing the actual output with a Dynometer, or a term used at the Bar when trying to impress people who don't know any better . .

If you're a racer (or engine Builder) and build an engine for a specific purpose (Like Quarter Mile Drag racing, for lack of a better one) then ET is (or should be) your primary concern.

Doesn't matter whether you're racing heads up or Brackets, it's ET or the potential to get to that ET that you're concerned with . .

And, based upon both experience of yourself, or those who are relatively successful at the type of racing you're doing, ascertaining the build and it's potential results should be, literally, empirical . . .

The "Fine Tuning" for good results and engine longevity belong to the user . . . and still have little to do with the spoken word "Horsepower" . . .

Jus' sayin'
x2! very true. build an efficient, reliable engine for your application and let the HP number fall where it falls
i think differently ... no self respecting car nut is gonna be ok with saying... well its 300hp but it runs consistent.... lol I'll take the ponies and tune it to be consistent :wink:
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Old 09-28-2012, 03:17 PM
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ejm
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Well it's not a drag motor and will never be consistant, its in a pulling truck and every track is different and the sled can be weighted differently as can the gearing it the weight box. So i was just asking to have a clue where i stand withe the other 600-625hp trucks out there. Sorry if this thread bothers some of you.
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Old 09-28-2012, 04:45 PM
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Are you in a class that limits what head or camshaft you can run?
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