How much HP??

Old 07-10-2008, 08:43 PM
  #1  
altune
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Default How much HP??

I am tryin g to determine a base line on an engine combo I am building.
It is a sbc, dart 4" stroke, 4.155 bore, 14.5-1 compression, heads that flow
350-355 cfm @ .700.
it is alcohol injected and also vac pumped.
drag engine.
Engine is new.
here is what I came up with:
engine alone 720 hp
alcohol injection 5% + 756 hp
vac pump + 35 hp = 791 hp
am I close?
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Old 07-10-2008, 09:04 PM
  #2  
cepx111
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Pretty close I'd say. A dyno will tell no lies though.

Later Cp
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Old 07-11-2008, 03:28 AM
  #3  
hammertime
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Default Re: How much HP??

Originally Posted by altune
I am tryin g to determine a base line on an engine combo I am building.
It is a sbc, dart 4" stroke, 4.155 bore, 14.5-1 compression, heads that flow
350-355 cfm @ .700.
it is alcohol injected and also vac pumped.
drag engine.
Engine is new.
here is what I came up with:
engine alone 720 hp
alcohol injection 5% + 756 hp
vac pump + 35 hp = 791 hp
am I close?
I'd say you are close, but we usually see 15-20hp for vacuum pump. Seen 45hp for injection.
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Old 07-11-2008, 03:19 PM
  #4  
altune
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It's kinda what I figured.
Close to 800 hp.
Possibly a bit more or a bit less
I have also a morroso oil accumilator and running less oil in crankcase.
no dyno's in my area
crap
Al
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