Im having a 383 stroker built right now,and after its done I wont have enough money to have it put on a dyno,so.. My goal is 500hp,Id like to know if any of you think I can reach that with my combo,I chose all the parts and did alot of research on everything to make what I think is a nice combo,here it is. high nickel 3970010 block,forged internal balance crank,h-beam 6 inch stroker rods,wiseco light weight forged f/t pistons,Edelbrcok E-TEC 200 heads,rpm air gap intake,800 eps carb,Comp magnum 292 244@.050 .534 lift with 1.6 ratio roller rockers,comp pro magnum high rev lifters,windage tray,ARP fasteners top to bottum,1 3/4 inch headers,calculated 11.17/1 CR,AND REV-ER-UP engine additive that I was told would give me 15-25hp. Well,thats what I spent all my cash on.Its going in my 81 camaro in front a super t10 4 speed.Will I hit my 500hp goal? If I dont would a big roller cam do it? I am having the intake port matched to heads and the heads have some additional flow work done,they flow 257cfm@.500 lift from the factory.Oh,and a 2 inch carb spacer is planned.I was told this combo wont even break the 400hp mark by some machine shops.So will I be happy with the results?

I have seen this combo pull 400 or more before. I think 500 is probably not real. The heads don't have enough flow, probably need about 275 cfm flow. the intake should probably be a single plane and you should be running a roller valve train with something around a .600 or a little more on the lift. This is just an opinion.

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SCOTT
69 RS-SS 396 4-SPEED

I don't think 500 hp is out of the question. I don't know if I like that cam though, that's an old design camshaft. You might want to contact Comp Cams and ask what they suggest. A solid roler may be better for you since this motor seems to be on the "race engine" side anyway, since pump gas is going to be out of the question.

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68 468 700R4, and here it is;
mutert23 (http://home.earthlink.net/~mutert23/)

I would recomend using the AFR 190 heads. Check out the dyno results, I have the same setup as the 460hp/470tq one. They also have a setup similar to your's, which is putting out 500hp/511tq on 92 octane.

Just my .02.
http://www.airflowresearch.com/chevy_dyno.htm

Smitty71

I dont know if I believe those dyno results from AFRs site.These E-TEC 200 heads flow about the same as the 190 AFRs,I have also had them cleaned up and smoothed alot so I might be at the same flow now.I know the 292 is an old cam but I got it cheap,Im goin BIG hyd.roller in about 6 months.I will be running this motor with 92 octane,I think it should work because of the longer rods,aluminum heads,fast burn chambers,big overlap cam,easy on the advance,etc. The new car craft has a ETEC 200 build up using an 8.5/1 350 with I think a 268 cam and made over 400hp.Maybe someone could run my combo thru desktop dyno to give me an idea,but it comes down to how much power gets to the road.About using a single plane intake,Ive seen dyno results that show a small block at 500hp only gaining 7hp with the single over dual plane,Ive made wise decisions except for the camshaft.

500 HP from a 383, yep. It can be done. I run one. Its break-in pull netted 515HP and We have tweaked it some since. 11.5:1, LARGE Crane Solid cam, Dart Sporstman II heads, very ported and polished, 1.5/1.6 rockers, Victor Jr Bowtie Intake and a Holley 750 round out my combo.

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Mark

1992 Firebird 355/Six Speed
1991 RS 350 / 700-R4
1987 Toyota Pickup 383 / 500 + HP 10.79 @ 123.95 Slicks / 11.997 @ 114.23 Radials
"Speed KILLS, so drive a FORD and live forever!"
http://personal.lig.bellsouth.net/~racer383/

Member of the "unwanted" 3rd Gen group.

<BLOCKQUOTE>quote:</font><HR>Originally posted by Mark W. Winning:
500 HP from a 383, yep. It can be done. I run one. Its break-in pull netted 515HP and We have tweaked it some since. 11.5:1, LARGE Crane Solid cam, 5.7 rods, Dart Sporstman II heads, very ported and polished, 1.5/1.6 rockers, Victor Jr Bowtie Intake and a Holley 750 round out my combo.

<HR></BLOCKQUOTE>



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Mark

1992 Firebird 355/Six Speed
1991 RS 350 / 700-R4
1987 Toyota Pickup 383 / 500 + HP 10.79 @ 123.95 Slicks / 11.997 @ 114.23 Radials
"Speed KILLS, so drive a FORD and live forever!"
http://personal.lig.bellsouth.net/~racer383/

Member of the "unwanted" 3rd Gen group.

I think you're definately over the 400 HP mark and probably breaking the 450HP mark now. I think you would need a healthy roller cam to hit 500 though. My 383 is running 440 - 450 HP with a CC 282S mechanical cam and unported Trick Flow 23 degree heads.

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68 Camaro, 383 small block with TH350 trans. 12.4's and never trailered.

92 octane with CR above 11??

Everything I have ever heard or read says it's going to ping? I have always heard 9.5:1 was the max for pump gas.

I built my 383 with 9.7:1 and run 93 octane at 38 degress total.

Is anyone else able to run 92 octane in a motor with compression higher than 11:1?

The aluminum heads disapate heat faster so the compression can go up and still use pump gas.

For proof I've seen an LT-1 camaro with 11.8 to 1 compression using aluminum LT-4 heads that were ported

Smitty71

Mark W. Winning do you have a dyno chart and complete engine specs? I am courious as to your exact parts combo.

I made 515hp before with 11.5 to 1 compression, ported dart 2' solid roller 260 and 270 at 50 with 650 lift, victor jr and an 850 holley, 1.75 headers.
I had 5.7 rods and ross light weight flat tops , I could run 92 with no prob because the cam was so big and the flat tops gave a nice flame travel.

nitrous383,

go to www.martelbros.com (http://www.martelbros.com) go to search,look for dragstrip plus (demo) its better than desktop dyno,IMO, and ask for alot of info and spec.s . its only about .2 slow in 1/4 times,but the gross HP rating is way off,net HP is very close....hope this helps.


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My '68 Camaro (http://hometown.aol.com/Dougs68Camaro/index.html)
Doug G.
68 Camaro
406 ci.
13.5@102 W/ 2.73POSI.

[This message has been edited by DOUG G (edited 08-12-2001).]

[This message has been edited by DOUG G (edited 08-12-2001).]

<BLOCKQUOTE>quote:</font><HR>Originally posted by rlrr:
92 octane with CR above 11??

Everything I have ever heard or read says it's going to ping? I have always heard 9.5:1 was the max for pump gas.

I built my 383 with 9.7:1 and run 93 octane at 38 degress total.

I have iron eagles with about 10.7:1 and I run 93 all the time with no problems.

Is anyone else able to run 92 octane in a motor with compression higher than 11:1?

<HR></BLOCKQUOTE>



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Prowling the Streets for rustangs

11.5, but plenty of cam also....

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Mark

1992 Firebird 355/Six Speed
1991 RS 350 / 700-R4
1987 Toyota Pickup 383 / 500 + HP 10.79 @ 123.95 Slicks / 11.997 @ 114.23 Radials
"Speed KILLS, so drive a FORD and live forever!"
http://personal.lig.bellsouth.net/~racer383/

Member of the "unwanted" 3rd Gen group.