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Old 05-28-2004, 11:16 AM
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SBC Buildup. How Much Horsepower?

Hey everyone i just built myself a nice little sbc and i didnt get a chance to get it dynoed. so i was wondering if anyone on here could run it through the desktop dyno program for me. i'd really appreciate it! thanks!! here are the specs:

350 block bored .040 over
forged crank and forged 5.7 rods
Speed Pro Pistons. 10.7:1 compression at 64cc.
.120" dome.
1.560 compr. distance
Deck clearance .025
Press or full float pin
Skirt clearance .0010
.040 Std
64cc cast heads, resurfaced, with 2.02 intake and 1.6 exhaust. dual springs up to .510 lift.
1.6 comp cams roller tip rockers.
260H comp cams camshaft
performer rpm air gap intake manifold
600 cfm edelbrock carb.

well there she is. thanks again!

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Old 05-28-2004, 11:58 AM
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difficult to say. probably at least 300 HP. Depends on too many factors.

so which one is it? pressed or full floating pins? or is that just what it said on the box?

I would have gone with a camshaft with more overlap if you're intending on running those 10.7:1 pistons with pump gas. Like the 280H magnum or preferrably even larger.

the blonde weasel
san diego, CA
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Old 05-28-2004, 12:31 PM
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Quote:
Originally posted by blndweasel
difficult to say. probably at least 300 HP. Depends on too many factors.

so which one is it? pressed or full floating pins? or is that just what it said on the box?

I would have gone with a camshaft with more overlap if you're intending on running those 10.7:1 pistons with pump gas. Like the 280H magnum or preferrably even larger.

the blonde weasel
san diego, CA
Lol, good find. Sounds like an advertisement for a crate motor or a motor on ebay or something. Could have just told us that man...

Anyway, you left out the single most important part anyway, the heads. What kind are they? Valve sizes alone don't tell much if anything at all.

I'm curious why somebody would go through all the trouble of running a dome and whatnot to get almost 11:1 compression and then use such a small cam?! You could use a lot more cam with that comp ratio, just a note.

K
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Old 05-29-2004, 02:49 AM
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the heads are stock GM heads that have been resurfaced and remachined. they new valves, springs, and studs, and have been through every test by the company i bought them from. intake runners are stock size too.

and the reason i stuck a small cam in is because i had it lying around and i all i have for the time being is a stock converter and i didnt have enough time or money to replace that as well.

still wondering if someone out there has a desktop dyno they can pass the specs through.. thanks!
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