How big of a carb should I get?

383, 14.1, heads flow 300, Turning to 7500

Will a 850 dominator do it?

 

You mean a 750 dominator, they never made an 850 dominator.

Really a 750 dominator is a 1050 dominator with different boosters that restrict cfm. Yes it will work great for your application,I ran one on a 406" with cnc'd Dart 227's, knarly roller and 14 to 1 the car went 10'-0s.

However, if your really looking for the "right" carb get ahold of Dale Cubic, CFM Specialties and have him build you something tailored to your set-up. I've had many carbs from many different builder (Book, Pro-Systems, Braswell, Taylor) and honestly Dale is about the best you could deal with and more reasonable than most as well.

 

yeah must be a 750....someone I know has it and said I can have it. They went to a 1050

 

you can change the boosters out and make a 1050 out of it too.

 

cool. I didn't know that

This carb is fresh and works good, they went 10.30's with it in a similar set-up

 

I think it would want something in the 900-1000cfm range. If you want to drive it, an 750-00 will do. Pro Systems set me up with a 780cfm(wet flow) Holley HP for a street driven 396sbc, 230cc head, 254/260 cam, 11.5:1, 7000 shift... Drives like EFI but It's probably giving up 20hp on the top end vs. a dominator setup. Goodluck!

 

not street driven at all. And I have way way more camshaft

 

Buddy of mine had a 850 AED carb on his solid roller 406, that mother would move out. 6.20 in the 1/8 in a 3000 lb 2nd gen. All motor.

http://www.aedperformance.com/

David

 

I go to AED all the time, but If I can get this used one I'm going to get erci bradby to built the carb and tune it. Maybe do a back to back comparison to the EFI set-up

 

I was considering going carb aswell but I am just scared I am going to lose power

 

I gained ~60rwhp going from a carb to EFI on my bracket motor. Now admittedly it was somewhat undercarbed (750cfm on a 60 over 427 BBC turinign 6,500). But that is part of the point - there is no such thing as a TB that is too big on an EFI motor. I am using a 2000CFM Dominator style TB and there is NO WAY that motor could use 2000CFM of carb, even in its' current 486ci form (the hp comparison was same to same displacement).

Rich

 

The local dyno facility has a customer that has a car that is a clone to my red car as far as year built, miles on engine but he runs injection and a stick, I run a carb and automatic. We run the same plugs, same headers, same exhaust you name it we are twins.

On the chassis dyno his car makes 10 less average hp and 12 less average torque versus mine, remember I have a non-lockup 3000 stall convertor. Also when I went to the dyno facility my cars timing was way to high (result of losing an alternator belt and not realizing it moved the timing marker) and it was robbing power from me.

My car is scheduled to go back in month (after I get it back together) and the "clone" is coming back the same day. The chassis dyno operator is really trying to make this an apple to apple test so he can try to get a better feel for what perhaps the injected car is lacking, he is even footing the bill for the dyno session.

On the track he ran 12.41 with a 1.68 sixty foot, mine ran 12.09 with a 1.60 sixty foot on the same pass and on the same day. Its funny racing with him, he grabs his laptop to tune and I grab a screw driver and a few wrenches to perform the same tasks.

This winter I'm getting serious about the cars weight loss program, I'm hoping to shed about 400lbs and add some more gear, more stall and get a proper alignment.

just my experience

 

But in your case it is a prolly a large differance in intake manifold setup correct?Maybe super vic vs LT1 intake?

I have a supervic single plane setup and I feel I will lose power if I goto the same intake with carb

 

I have read EFI makes more midrange power. But every comparison I have seen they estimate the carb to make more peak power yet it never does. The EFI is better all the way across.

I have 2 dyno pulls on DVD that went from carb to EFI....problem is they went from a dual plane intake with carb to a single with EFI so its not really a fair comparo

 

I use the GMPP LT1 intake, dual plane, nothing trick about it. I want to switch to a victor style intake, but we'll see.