Thread: 383 Stroker Build

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if you can gain techinspector's attention, he has a link to a killer car page that has hundreds of proven engine combinations. I used to have it but I misplaced it somewhere in my harddrive and now i can't find it.

Originally Posted by FFM

Hey guys, well I currently have my shortblock built. 4-Bolt mains, Eagle H-Beam rods, Hyper pistons, Scat crank. I'm wondering if any of you know of any combos that have produced 450-500 HP. I'm trying to decide on what cam/heads to run. Any input is appreciated.

I have a combo in mind that I think should work very well. Here it is, let me know what you think.

Holley 750 double pumper carb
AFR 190cc street heads
AFR FloPower RPM intake
Comp Cams 280° Magnum hydraulic
280° of duration
230° of duration @ 0.050 in. lift
0.480 in. lift
1 3/4 headers
MSD distributor
9.5:1

Thanks
-FFM

I have not used that intake.
I would say you are right on the edge for going to a single plane intake like a Victor intake.
To cross over to the 500 hp area.
I would run a hyd. roller cam.
I would try a Comp. cam XR288HR or a Crane part number 118571.
With those heads and either one of the cams listed above I would try and run 10.5 to 1 comp. ratio.
If you can't run that much comp. ratio take about five degree's of duration off the cam at .050.
Yes the engine will run on 92 pump gas and about 36 degree's total timing.

I didn't have anything on your intake, I used the Performer RPM instead - should be close.

I think you are going to have to 'give' somewhere. With a sub 500 lift hydraulic camshaft and dual plane intake, you will be very hard pressed to get the 450 to 500 hp range.

Depending upon how you plan on using the car, the combo as is has a tremendous amount of torque. If you see more street driving than track time, thats what you are looking for anyways.

On the screen above - curious about the deck height of 9.000????

Unless the program units are actually factions of an inch?

Originally Posted by FFM

I have a combo in mind that I think should work very well. Here it is, let me know what you think.

Holley 750 double pumper carb
AFR 190cc street heads
AFR FloPower RPM intake
Comp Cams 280° Magnum hydraulic
280° of duration
230° of duration @ 0.050 in. lift
0.480 in. lift
1 3/4 headers
MSD distributor
9.5:1

Thanks
-FFM

I built my 383 based on this combination except I used Edelbrock's RPM intake and 750 carb, and I am running one point more compression than you are (10.6:1). I would advise you to use the Edelbrock RPM or the RPM Airgap rather than the AFR intake if you are going to do much street driving. My engine dynoed at 450 hp and 467 ft. lbs. of torque. It really rocks in my deuce coupe!

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In my opinion, you're starting with the best heads money can buy and they're the correct size (cubic inches times 1/2 for intake runner size, street motor).
AFR shows five builds on their dyno website. Check 'em out.......
http://www.airflowresearch.com/chevy_dyno.php

Originally Posted by techinspector1

In my opinion, you're starting with the best heads money can buy and they're the correct size (cubic inches times 1/2 for intake runner size, street motor).
AFR shows five builds on their dyno website. Check 'em out.......
http://www.airflowresearch.com/chevy_dyno.php

Look at the fifth build down.
Over 450 lbs. of torque at 2,500 rpm's.
Over 500 hp at 5,500 rpm's.
All this on pump gas and less than 10 to 1 for a comp. ratio.
This is what ever sbc guy needs.
This is as close to perfect for a street rod or muscle as you will ever get I.M.O.

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Originally Posted by FFM

That combo is pretty damn impressive.
That uses a roller cam, now I'm wondering, my block is not a roller block. How spendy is it gonna be to make it a roller?
Also, wouldn't you think it would be possible to get lets say 480 HP and just over 500 LB FT with a hydraulic flat tappet such as the magnum 280? I'm seeing a combo, which uses the AFR's and the magnum 280 hydraulic flat and they are claiming 471 hp and 515 torque.

-FFM

It depends on how good you want it.
To be safe I would say it would add about $550 to the build price if you figure the other hyd. cam and lifters at $140 and you would need a better valve springs also.
I run a small or reduced base circle cam in any of the 383's I build.
The 280 would be the largest hyd. cam I would run in a sbc. with the removal of zinc from todays oils.
I have customers that run 7.00's in the 1/8 mile out of a sbc. with a hyd. roller cam and some even drive them to the track.
If I am building a max. effort 383 sbc. for the streets the most hp out of a hyd. cam I would even try for is around 1.1 to 1.2 hp per cubic inch.
After that I would look at hyd. roller's or mech. rollers.