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Old 05-14-2011, 06:33 PM
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Horsepower guess!! please

hey guys my motor is in the shop right now getting finished up. I would like some of you to tell me what you think my horsepower will be... (a estimate of course).. i dont live near any dyno's the closest one if about 5 hours away.. so any help would be appreciated.
heres what i have. to the best of my knowledge the motor should have between 10:2.1 and 10.5 to 1 compression ratio..

gen v 454
steel crank... eagle forged rods..
.30 over kb 25.5cc dome pistons....
lunati solid roller cam 663" 683" 249 255@50
lunati roller lifters
pro comp rect port alum heads. 320cc intake. 115cc .. valves are 2.25..1.88
roller rockers.. shootout intake ... double roller timing chain. holley 850DP
and a mallory ign system and headers..
let me know what you guys think. or if i forgot something important. i think i got it all.

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Old 05-14-2011, 06:36 PM
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477.3
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Old 05-15-2011, 05:42 PM
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HP estimate/BBC

At 461 cid I'd guess 1.25-1.35 HP/CID. Thats 576-622 HP. A lot depends upon the tune and combination of parts.

Ron
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Old 05-15-2011, 06:38 PM
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thanks guys!
ya im not looking for a exact number just seeing what kind of number i can get people to throw at me. there are alot of sharp guys on here who know their stuff.
thanks again
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Old 05-15-2011, 07:07 PM
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Sounds good not sure what the RPM range is on that camshaft.
Sounds like a lot of Midrange torque an HP. I'll guess in the 570 HP range. Sounds like it could use more carb. Low gears an good converter.
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Old 05-17-2011, 08:59 PM
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cam range is 2800-7200.. and gears righ now are 456 and a 3500 stall..would like to change the gear to like 410.. but building the motor took every penny so maybe here soon ..
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Old 05-17-2011, 10:04 PM
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My fancy computer software shows this...

578HP @ 6000RPM
578FT-LB @ 4500RPM

you are making over 400FT-LB until 6500RPM where it drops quick. you are making over 400HP between 3750RPM, and 8200RPM.
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Old 05-18-2011, 07:42 AM
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wow!. that must be a sweet program. thanks for doing that for me. ..... that all sounds like music to my hears with those numbers
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Old 05-23-2011, 09:56 AM
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if anyone else would like to share what they think i would appreciate it
thanks
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Old 05-23-2011, 10:53 PM
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Not big enough carb to make the most in my opinion definately not 8200 rpm
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Old 05-23-2011, 11:47 PM
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what would be the best carb for this motor.. I am going to be driving it on the street and I do relize it probably won't get any mpg anyway. But what would be best for the motor to make awesome power and be streetable at the same time thanks guys
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Old 05-24-2011, 12:50 AM
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i like a 1050 or 1250 if i was really worried with street driving no smaller than a 950 but you got a fairly agressive cam
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Old 05-24-2011, 12:51 PM
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Well, I don't really think you are really going to see 8200RPM.

For a street engine you can make the 850 work. you just aren't going to spin much past 6000RPM... For best results, cpankey226 is right on.
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