Posted By: CrAlt
2806301 383 intake...worth upgrading? - 03/06/09 07:29 AM
I have a 1969 383 with 10:1 CR, 452 heads, and a 600CFM carb. The bigger summit cam and headers.
Not counting weight..is there any performance to be had with going to a Ebrock RPM or other after market intake? From what i read the stock intake isnt all that bad.
thanks.
Posted By: NANKET
Re: 2806301 383 intake...worth upgrading? - 03/06/09 07:43 AM
Definately worth an upgrad to the performer RPM, plus a larger CFM carb. Do you have hood clearance for it?
Posted By: CrAlt
Re: 2806301 383 intake...worth upgrading? - 03/06/09 07:55 AM
Its a '69 B-body... stock hood
Posted By: GTX MATT
Re: 2806301 383 intake...worth upgrading? - 03/06/09 02:31 PM
I dont think the stock 4 barrel intakes are too great, maybe theyre decent in comparison to an old school Offy or a crappy Weiand or something, but the RPM is a far better intake. Its been proven on the dyno and at the track. Even on a stock 383 I'd bet its worth 20 horse.
Posted By: sch1966
Re: 2806301 383 intake...worth upgrading? - 03/06/09 10:51 PM
Is there one stock intake that is better than the others? Or are there any tricks that can be done to improve stock unit?
Posted By: dogdays
Re: 2806301 383 intake...worth upgrading? - 03/07/09 08:54 PM
why bother? unless you are going for numbers-matching. Pick up that cast iron manifold, it is heavy. Save maybe 40 lb high over the front wheels with an aluminum intake, makes for a better handling car.
R.
Posted By: forphorty
Re: 2806301 383 intake...worth upgrading? - 03/07/09 09:50 PM
Stock intake weighs about 40 lbs. aluminum will be about 15 lbs. dp4b will work pretty decent if you dont have room for a perf rpm.
Posted By: sch1966
Re: 2806301 383 intake...worth upgrading? - 03/09/09 01:56 AM
I realize the benefits of an aluminum manifold but I am looking for creativity with what Ma Mopar gave us. I'm curious about how much port matching would help, also what difference would it make to mill down the plenum dividers? Are there other "tricks" such as air dams that would make a difference? I'm the type of person that likes to optimize what I have before moving on.
Posted By: cdp
Re: 2806301 383 intake...worth upgrading? - 03/09/09 11:21 PM
High Performance Mopar magazine did an article on this in their 65 Coronet 500 that they had a 383 magnum motor in. I think they had a stock intake and manifolds, then extrude honed them and got about 5HP. Then went to an Eldebrock and got huge gains. Something like high 13's with a stock magnum exhaust system (compared to mid-low 14's)
I'm sure the Dp4b and the Weiand 8008 are better choices and look stock. The 8008 has a stock coil location, where the DP4B is righ in front of the carb. Which is in the way for my stock 70 Holley.
Maybe a 72 T-quad would be a better improvement?