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I did this one a few years ago. 400 with a 383 forged crank, Hemi rods and 451 pistons. With lightly ported Edelbrock heads and a decent roller cam it makes 600 hp. Made for a slightly radical A body car that my buddy drove to the track and back.

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What kind of machining was involved? What 451 pistons?

I already have the 400 block and forged 383 crank please advise!!

Dan

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based on my own use of one on an 383HP in a street car and the Hot Rod test, stay away from the Holley Street Dominator intake for sure if you want low end grunt. Don't know anything about that old Weiand.

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based on my own use of one on an 383HP in a street car and the Hot Rod test, stay away from the Holley Street Dominator intake for sure if you want low end grunt. Don't know anything about that old Weiand.

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Why's that?

I am running one now it pulls great for me in my 383. The holley SD intake rated just fairly lower than the Edelbrock RPM that one of mags tested a few years ago with a whole bunch of intakes on a fairly vanila 383 IIRC. If that's what you have it's not a terrible intake.

Ohh here it is...hot rod did it with a bunch of manifolds. http://www.hotrod.com/techarticles/hrdp_0712_mopar_intake_manifold_comparo/index.html

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based on my own use of one on an 383HP in a street car and the Hot Rod test, stay away from the Holley Street Dominator intake for sure if you want low end grunt. Don't know anything about that old Weiand.

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Why's that?

I am running one now it pulls great for me in my 383. The holley SD intake rated just fairly lower than the Edelbrock RPM that one of mags tested a few years ago with a whole bunch of intakes on a fairly vanila 383 IIRC. If that's what you have it's not a terrible intake.

Ohh here it is...hot rod did it with a bunch of manifolds. http://www.hotrod.com/techarticles/hrdp_0712_mopar_intake_manifold_comparo/index.html

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at 3000rpm the SD is down 17ft lbs to a tm6, down 27ftlbs to an rpm perf, and down 37ftlbs to a plain performer. Imagine what those numbers would be at 2500rpm? That's a serious gap in tq for a street cruiser.
The SD made great power up top but gives up 17ftlbs more at 3000rpm than any other intake tested. That's exactly how it felt on my engine vs the stock intake and rpm perf. I can see using a SD on a stroker or a race engine, but I can't see using it on a street car based on my butt-o-meter. Maybe you should try a torker or rpm perf on yours, you might like it even better if it's a street car.

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All that is true, but there's a big difference in spending $230 on an intake and running what you have on hand. Kind of the same situation this guy has. If he's got a single plain and he's not looking at spending a ton of $$ than use it. It's better than stock and it won't be terrible...A lot depends on gearing and converter too. I'm running 3.73's and a 2600 ish converter so the motor is in the power band above 3k often.

I'll gladly swap an RPM on if I can get a good deal on one but those aren't old enough intakes to be found in the swaps much. Free is good though if your offering...

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based on my own use of one on an 383HP in a street car and the Hot Rod test, stay away from the Holley Street Dominator intake for sure if you want low end grunt. Don't know anything about that old Weiand.

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Why's that?

I am running one now it pulls great for me in my 383. The holley SD intake rated just fairly lower than the Edelbrock RPM that one of mags tested a few years ago with a whole bunch of intakes on a fairly vanila 383 IIRC. If that's what you have it's not a terrible intake.

Ohh here it is...hot rod did it with a bunch of manifolds. http://www.hotrod.com/techarticles/hrdp_0712_mopar_intake_manifold_comparo/index.html

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at 3000rpm the SD is down 17ft lbs to a tm6, down 27ftlbs to an rpm perf, and down 37ftlbs to a plain performer. Imagine what those numbers would be at 2500rpm? That's a serious gap in tq for a street cruiser.
The SD made great power up top but gives up 17ftlbs more at 3000rpm than any other intake tested. That's exactly how it felt on my engine vs the stock intake and rpm perf. I can see using a SD on a stroker or a race engine, but I can't see using it on a street car based on my butt-o-meter. Maybe you should try a torker or rpm perf on yours, you might like it even better if it's a street car.

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All that is true, but there's a big difference in spending $230 on an intake and running what you have on hand. Kind of the same situation this guy has. If he's got a single plain and he's not looking at spending a ton of $$ than use it. It's better than stock and it won't be terrible...A lot depends on gearing and converter too. I'm running 3.73's and a 2600 ish converter so the motor is in the power band above 3k often.

I'll gladly swap an RPM on if I can get a good deal on one but those aren't old enough intakes to be found in the swaps much. Free is good though if your offering...

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You hit the nail on the head with that one! The clue is that Im poor as dirt. Big $$ items are out of the question, Im 27 and far from rich.

I say it's better for me to experiment and find out than to tinker with honda civics and be really dissapointed overall in many ways

If anybody wants to donate a decent cam, headers,carb,tray or roller timing chain Im all
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I'm 'cheap' too, I've never bought a new intake. Over 10yrs I've grabbed good deals on about 1/2 dozen different b block intakes just to try them out, including the rpm perf. That's the one on the car now (with efi).

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We'll all I can say is that you're a lucky guy! I WISH i could find a used B block RPM manifold at the swaps. I jsut checked ebay for grins and I found a couple and all of them were $250+.

I ain't knocking the intake...just saying that compared to stock the SD is really not that bad.

That Mopar muscle article was also WAY more foregiving of the SD than the Hot rod one. For some reason the Hot rod one had great results on just a plain jane performer!?!?! I wanna call foul on that one. That vanilla performer is basically an aluminum version of the stock intake! I have one here on the shelf too and I KNOW the SD runs way better than that intake did on my 383.

Bottom line is if you got it and you have taller than 3.23 gears I don't think its a bad call to use it...unless you have an RPM than it's not an argument.

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As I posted earlier there is a way to build a decently compressed stock stroke 400. Cut the crank pin to 2.2", Use Scat rod# 6680022(A) @6.800",and either KB 825 @1.480 or KB 828 @1.485. With a 9.98 deck the piston is either 0.010" or 0.005" in the hole, both pistons have a 4.5cc valve relief. Depending on head and gasket combo the CR can be in the mid to upper 9's.

Randy

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