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Old 07-21-2003, 01:53 PM
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The 80 Hp Question

I have a 383 stroker that goes like this.

Four bolt main post 86 block
forged crank and steel PM connecting rods
high silicon aluminum pistons
fast burn aluminum heads with 62 cc chambers (stock)
compression is 9.7 to 1
roller cam and lifters 509"I 528"E 222*I 230*E 112 lobe sep.
35* timing
edelbrock rpm air gap
Holley 770 street avenger
MSD 6a box and pro billet dist

on the Dyno it made 420 hp at 5500 rpm and 455 tq at 4200 rpm

does anyone have any suggestions on how to get this motor to 500hp. 420 is very cool but alot of bragging rights go along with the 500 mark. I would also like to do it with all motor, no nitrous or super-turbo chargers.I have a few Ideas but I want to see what you guys think. I'M ONLY 80 HP AWAY

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Old 07-21-2003, 02:13 PM
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It's all in the heads!
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Old 07-21-2003, 03:17 PM
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You could be losing out on some power with the heads. Ported sportman IIs could easily get you another 50 hp. Maybe more!

KD
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Old 07-21-2003, 03:24 PM
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AFR 190cc or 195cc aluminum heads. About $18.75 per horsepower for the 80 more you seek.
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Old 07-21-2003, 06:26 PM
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You can get the job done with the fastburn heads, but you are going to need to step up the camshaft duration. You are going to need to shoot for duration numbers @.050 of around 245-250 degrees by my estimation. You are going to need to shoot for peak power around 6500 RPM, I would also ditch the air-gap in favor of a Victor Jr. You will then need to spend some time tuning on the thing to see your goal, but I basically feel that you just need to ring some more RPM out of the thing and you'll get your numbers. You could work the heads over a little to help out your cause.
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Old 07-21-2003, 06:37 PM
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Quote:
Originally posted by Frisco
AFR 190cc or 195cc aluminum heads. About $18.75 per horsepower for the 80 more you seek.
yeah, the AFR heads would definatly make it alot easier...I call them idiot proof...no matter what you do as far as cam and intake changes...its still gonna run good...lol...unless you run that 360/360 318/318 .999/.999 cam...
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Old 07-21-2003, 08:43 PM
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To give you some ideas, look threw some of these combos.
http://www.ryanscarpage.50megs.com/combos1.html

Numbers 17 and 71 should be of interest. Number 54 is a 500+ hp 383 as well.

You might get there with a good porting job and a little more cam. The little things like a crank scraper, windage tray, and carb spacers can put you over the top if you get close. Dan
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Old 07-22-2003, 06:32 AM
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thanks guys, those AFR heads look like they might be the ticket with a bigger cam. what do you think of this- shave the heads to bump up the squeez, larger cam and a tunnel ram with say dual 600s. Or would a tunnel ram just be a pain in the *** on the street. btw 1983 buick regal.
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Old 07-22-2003, 06:58 AM
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The tunnel ram intake can be a major pain on a street vehicle. I'd stick with what you have.
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