Thread: Finishing My 383 Sbc Stroker,cam And Intake???

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HI GROUP! IM READY TO FINISH MY ENGINE BUILD AND I REALLY NEED SOMEONE TO SUGGEST THE BEST CAM AND INTAKE TO USE TO MAKE THIS THING HAUL AZZ! HERE IS WHAT IVE GOT SO FAR,78 NOVA,TURBO 350,3500 STALL,4.10,28 INCH TALL TIRES.THE ENGINE HAS K BLACK #134SILVOLITE HYPERS,5.7 RODS,CAST CRANK.THE HEADS ARE ALUMINUM,200c INTAKE RUNNERS,2.02IN,1.60EX.,FULL ROLLER ROCKERS1.5,AND A HOLLEY 750VAC SEC CARB.I WANT TO GET THE BEST QUARTER MILE TIMES I CAN.I DONT NEED TO WORRY ABOUT VACUUM BECAUSE ITS GOT MANUAL BRAKES.THE CAR WILL SEE SOME PLAY ON THE STREET,BUT THE STRIP IS GONNA BE HOME.I DONT THINK I CAN GO WITH A ROLLER CAM RIGHT NOW BECAUSE OF FUNDING.I HAVE BEEN TOLD SO MANY DIFFERENT WAYS TO GO THAT IM LOST NOW.HELLLLLP!!!!! THANKS!!!!!

you went and did all that with a cast crank? wow man. use a holley strip dominator edelbrock copied the design years ago and strip dominator is cheaper and IMHO better. cam i am not a cam guy id say something in the .560 range

I think with that 4.10 gear and 3500 stall . The biggest camshaft I would run is the Comp CamsXE284H . That cam is 240/246 dur at .050 with 507/510 lift and a 110 L/S . Do remember this is a 383 not a 406 and make sure the rods have enough clearance to the camshaft . Many 383s have broke cams from not being set up right . For your intake I do think an air-gap Dual-plane Like the Weiand Stealth Air-Strike will add to the HP and low-end Torque . But I would sell that Holley 750 V/S and add the money to buy a 750-800 Holley D/P COOL

Thanks! I Clearanced The Rod Bolts To Make Sure Hitting The Cam Was Not An Issue.would The Rpm Airgap Work Well On The Strip?? Do You Think That Cam Is Big Enough To Be A Good Quarter Miler?? Thanks!!!

Should base your selection on the designed rpm range for the engine. Match the components to match REAL WORLD rpm, not what you wish it could run. With the cast crank and hypereutectics, you may want to limit your projected rpm and pick a cam, intake, and carb that will work well together. With the vacuum secondary Holley, getting the correct secondary spring and power valve will also become important. IMO I would use a cam, carb, and intake that will perform well to about 6500 rpm.

Super Sound Advice! Nothing Worse Than Someone Trying To Turn 9 Grand With An Engine That Wasnt Built To Turn 6!keeps The Shop Busy.thanks!!!

Originally Posted by tango

I think with that 4.10 gear and 3500 stall . The biggest camshaft I would run is the Comp CamsXE284H . That cam is 240/246 dur at .050 with 507/510 lift and a 110 L/S . Do remember this is a 383 not a 406 and make sure the rods have enough clearance to the camshaft . Many 383s have broke cams from not being set up right . For your intake I do think an air-gap Dual-plane Like the Weiand Stealth Air-Strike will add to the HP and low-end Torque . But I would sell that Holley 750 V/S and add the money to buy a 750-800 Holley D/P COOL

Yes,this cam will work fine I.M.O.

Originally Posted by SMOKEDOG7142000

HI GROUP! IM READY TO FINISH MY ENGINE BUILD AND I REALLY NEED SOMEONE TO SUGGEST THE BEST CAM AND INTAKE TO USE TO MAKE THIS THING HAUL AZZ! HERE IS WHAT IVE GOT SO FAR,78 NOVA,TURBO 350,3500 STALL,4.10,28 INCH TALL TIRES.THE ENGINE HAS K BLACK #134SILVOLITE HYPERS,5.7 RODS,CAST CRANK.THE HEADS ARE ALUMINUM,200c INTAKE RUNNERS,2.02IN,1.60EX.,FULL ROLLER ROCKERS1.5,AND A HOLLEY 750VAC SEC CARB.I WANT TO GET THE BEST QUARTER MILE TIMES I CAN.I DONT NEED TO WORRY ABOUT VACUUM BECAUSE ITS GOT MANUAL BRAKES.THE CAR WILL SEE SOME PLAY ON THE STREET,BUT THE STRIP IS GONNA BE HOME.I DONT THINK I CAN GO WITH A ROLLER CAM RIGHT NOW BECAUSE OF FUNDING.I HAVE BEEN TOLD SO MANY DIFFERENT WAYS TO GO THAT IM LOST NOW.HELLLLLP!!!!! THANKS!!!!!

If you don't mind running the valves every now and then, go for a solid lift cam. A solid lift cam will get you down the 1/4 a little quicker. The flat top KB's are around 11:1 compression with a 64cc combustion chamber. That can support a pretty decent cam.

I suggest a Comp 285B-6 If you had a little more converter, the Comp 290B-6 would be a good choice.

Comp 285B-6 = advertised duration 285in/295ex, duration @.050" 250in/260ex, lift .532in/.555ex, 106 lobe separation angle. RPM Range 3500-6500

A Victor Jr intake would work well and scrap the vacuum secondary for a 750 double pumper.

THANKS RAY! I THINK YOUR PARTS LIST WILL BRING THIS ENGINE TO LIFE,IN A BIG WAY! THE CHAMBERS ON MY HEADS ARE 64cc,SO THE COMPRESSION WILL BE THERE.ALSO,IMM GOING TO TAKE THE GROUPS ADVICE AND GO TO A DOUBLE PUMPER.THIS LOOKS GREAT ON PAPER,CANT WAIT TO SEE HOW IT DOES AT THE STRIP! THANKS!!

Originally Posted by camaro_fever68

If you don't mind running the valves every now and then, go for a solid lift cam. A solid lift cam will get you down the 1/4 a little quicker. The flat top KB's are around 11:1 compression with a 64cc combustion chamber. That can support a pretty decent cam.

I suggest a Comp 285B-6 If you had a little more converter, the Comp 290B-6 would be a good choice.

Comp 285B-6 = advertised duration 285in/295ex, duration @.050" 250in/260ex, lift .532in/.555ex, 106 lobe separation angle. RPM Range 3500-6500

A Victor Jr intake would work well and scrap the vacuum secondary for a 750 double pumper.

I agree. A Victor jr. and a 750 double pumper coupled with the Comp 285B would be a good choice with your heads.

I'm not a chebbie guy, but the Victor Jr. is rated for max power from 3500 to 8000 rpm.... IMO there might be a better choice that will start making peak power at a lower rpm, maybe something that makes max power in the 2500-6500 rpm range?????

Also have to differ a bit on carbs. With the automatic transmission I've always been able to "dial the car in" and maintain better consistency with a vacuum secondary carb. I've always found it preferable to have a very consistent car then a fast car that may or may not be able to duplicate it's ET within a few hundredths all day long..... If you're going to run flat out, heads up type of racing it might be fine. By the description you have given of your car sounds like more of a bracket racer...I think I'd be looking at components that would give me consistency vs. peaky power that can come and go from round to round.....

I might get some heat for this, but I'd take a long look at an Offenhauser 360* intake with no more than a 700 DP with a standard tranny. If you're running an auto tranny and mostly on the street I'd stick with vacuum secondaries.

Well, a Nova is a heavy (by race standards) car..... I don't think I'd give up on the vacuum secondary carb... Too much cam and too much carb in a heavy car can lead to one big low end bog....and with the hypereutectic pistons and a cast crank, don't think I'd be wanting to zing it 7,500-8,000 rpm on a consistent basis....and to be consistent, you have to be able to do the same thing round after round after round......

Tango sent me this....


STICK TO BODY WORK . YOUR NOT AN ENGINE MAN . AND THAT'S OK

Maybe I don't suggest things that will max out the horsepower.... Nor do I intend to.... I've been drag racing a couple years now, and by far the single most important thing to do in a drag car is to be consistent. This is best done by running the engine at 85% to 90% of it's capability......Only the pro classes need to go flat out every run.

And Tango, I'm not just a body man. I can build every part of the car other then the upholstery. If I had a sewing machine I'd try that.... There's a whole lot more to going fast and surviving round after round at the dragstrip, or running wfo down the highway then just the engine.....

So anyway Tango.... Post us some pictures of the builds going on in your shop this winter.... Some of us are very interested!!!!!!

Well guys, I'm running these combos and have been for years. I know the Victor Jr is rated 3500-8000 but I will tell you it is one of the most versatile intakes ever made for the small block chevy. It'll dang near work on anything. I've run it on 283's to 406's.

Recently I changed from an RPM Air Gap to a Victor Jr on my 385cid. I lost a couple hundreths in 60ft but gained a couple MPH and my E.T. dropped. This is on a 6500 rpm engine.

I've tried the vacuum secondary carbs. They worked good for me with a tight stall. Once I started with higher stalls I found that on a dead hook they'll bog the engine. Stiffer springs kills the 60ft.

On the engine he's building, he'll never be satisfied with a vacuum secondary. If he had a tighter stall or a smaller engine, then maybe so.

His biggest problem with consistency is going to be traction. It took me a while to get my '77 Nova to pull consistent 1.46 60's.