Ok I am faced with the problem of selecting an intake /carb for my future 383.... but need to run it now on my 350.... but have not finalised the specs for the new 383! And I dont want to buy an intake/carb now, and again later.

As far as the 383 is concerned, I basically want to build a high horse power street/strip engine with a little more strip! So far I have settled on AFR 195cc street heads, and a cam with approx 140 duration @ .050 . Unsure about solid or hydraulic. It'll be a well chassis tuned 3000lb car with a 3.77 rear and a 4-speed. I am not affraid to build a 'high-maintenace' engine. Looking forward to it actually smile.gif .

Everyone is telling me to go the RPM Air Gap/750 Holley but it's a duel plain manifold. My goal is to reach 12 sec et's. When I get there I don't want to be 'limited' by a duel plain intake and find I need a Victor Jr to go LOW 12's.

Personally I am thinking towards a Victor Jr/650 Holley D/P. I heard you can still maintain a small level of streetability with these.

Opinions please anyone?

Well, the question is, are you willing to sacrifice torque for horsepower? With a single plane, it's going to take away from the torque and want to give it more horsepower in the upper RPM's of the motor. I personally like the dual plane's better, but on a 383 you can usually run a Single plane because the longer stroke helps with torque. I'd go dual plane with the RPM Airgap.

Originally posted by OzRod:


and a cam with approx 140 duration @ .050 .
Opinions please anyone? I would go with stock heads, intake, and carb with such a mild cam :D

I agree with thrasher...that's a pretty tame cam.
Another BIG factor, is what compression ratio?
Can you run a Victor jr and have good street performance?? why yes you can..with the right combo. I run a Victor jr, with a 650 DP on my 355, but I also have 10:5.1, a Isky Z-70 solid cam 548 lift 304 adv. 264@.050 on 110 LSA, 2.02 cammel humps, 3.90 rear gear, and an M-21 4 speed.
It does lack some lower end torque, but with the steeper rear gear, AND a 4 speed, it's still PRETTY streetable. :D
Your current 350 will be a slug with the single plane.

er.... better make that 240 @ .050 graemlins/clonk.gif but it's only a ball park figure.


Yes I am willing to lose street performance. Just want to 'drive' it on the street and 'race' it on the track.

I want to limit comp at 10.5:1

I gues the question is what do I need to reach my goal? That is the question I ask you guys...

Also what CFM ratings would you recommend? I know that is hard to answer without any real engine specs but I have to think long term about this one. I can't afford to buy a carb now and another later.

I'll appreciate anything you guys say. Good or bad. graemlins/thumbsup.gif

Go with a RPM and the new 750HP. No choke, but still has vac ports. A VS would work better on the 350, but would slow down a 383 3.73 lite manual car.

For cams, from what you've said, go solid.
A 276/284 is good, but a 280/284 or 288 might be better. With a 110 LSA, maybe 112 with the 288 exh.
Lunati (http://www.holley.com/HiOctn/ProdLine/Products/IEC/IECC/Chevy7.html)

A 67cc head and a flat top will give you 10.3 CR.
You might want to check into a Brodix RR200 w/CNC chamber. Flows like a AFR 210 through .500 lift according to my indepented source.

Ask WolfPlace about them. He has good prices too on both brands.

My Camaro won't pass tech yet, but I G-teched it at 114 mph with spin through most of 1st.

Ok thanks everybody for their opinions. I have a better understanding then before. Realize the way to go is the RPM Air Gap way. As far as the holley goes I still have a question....

Originally posted by Scott_68_SS:
Go with a RPM and the new 750HP. No choke, but still has vac ports. A VS would work better on the 350, but would slow down a 383 3.73 lite manual car.
From this I presume you're talking about a mech sec HP 750 holley. Just scanned the Holley web site and couldn't find one that matched your description. Or I am reading things wrong (most probably... graemlins/clonk.gif clonk again).

The closest I found was part #0-80529-1. Its vac sec with the 3 vac ports. Am I reading this wrong?
http://www.holley.com/HiOctn/ProdLine/Products/FMS/FMSC/FMSC.html#Universal

Bump

Ozrod I think he meant the 4150 series Holley model 0-82750 which is a chokeless vacuum secondary 750 cfm Holley. I just bought one a few weeks ago.

It's the new one they are advertising. Well up here at least. Not sure on the VS, Just wished they made the 950 the same way when I saw it.
Probably not on their site yet.
For the cost, you could get two used carbs, one for each engine. Not sure on the used market down there though.

Ok thanks guys for putting me on the right track. As far as used/reco'd carbs go, there are plenty down here, just had too many bad experiences with them. Thanks again!