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Old 07-23-2012, 01:29 AM
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need help estimating the HP of my new engine?

Ok i just build a sbc 350 for my car and i need help with trying to figure how much HP it should have.

ENIGNE SPECS:
sbc 350 bore 40 over
Comp Cams 'Magnum 280H' Hydraulic Flat Tappet Camshaft
Fel Pro 1094 Shim Head Gasket Thickness .015''
76cc heads
125 dome pistons
9.9.1 CR
edelbrock performer RPM intake
edelbrock 600 cfm carb
hooker headers
2200-2700 STALL


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Old 07-23-2012, 03:19 AM
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~375 at the crank maybe? more info on the heads would be helpful but guessing doesn't really mean much. results are what matter
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Old 07-23-2012, 08:29 AM
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Assuming they are stock smogger heads with 1.94x1.50 valves my guess is 330-350ish. What is the casting numbers on the heads?
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Old 07-23-2012, 10:10 AM
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Quote:
Originally Posted by zildjian4life218 View Post
Assuming they are stock smogger heads with 1.94x1.50 valves my guess is 330-350ish. What is the casting numbers on the heads?
You're being quite generous. The zz4 with the L98 heads and roller cam is only 355hp. I was gonna say about 275 to 300.
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Old 07-23-2012, 12:12 PM
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the head castings are 882
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Old 07-24-2012, 01:20 AM
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Not more than 329hp. On a good day. and no torque.
The 882 heads along with the 462624 heads are the worst of the worst SBC heads.

You will see a huge increase in performance just by getting better cylinder heads.

+80 hp 1 whole sec et reduction, big MPH increase in the 1/4 mile after ditching these dogs.

Until you upgrade the 882 heads this motor is going to be a disappointment.
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Old 07-24-2012, 07:47 AM
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with the 882 heads you are pretty much limited. I think you would be lucky if you were making 300hp. you have to remember that the heads you are using where used on 350 motors that where making 160hp. to double the hp that those heads were originally intended on making would seriously be doing something. I can't find the exact numbers but i dont think those heads where flowing more than around 180cfm @ .500" lift.

if you were willing to spend around 800.00 for a set of aftermarket vortec heads like the RHS pro torkers, I think your hp would go from around 280-300 up to around 350-360hp
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