1969 Road Runner 4 speed 3.91 gears, 440, 10.5:1 CR, Stealth aluminum heads, Comp cams XE284 cam, Edelbrock RPM intake, TTi 1 7/8" headers/ 3" exhaust. Mostly street driven and the occasional trip down the 1/4. The engine made 501HP/514TQ on the dyno with the engine shops dyno carb (not sure what it was).
I currently have FAST EZ EFI 1.0 on the car, but the fuel pump died on the way home from a car show yesterday. The EZ doesn't work great with the cam in the engine, and I'm not sure I want to upgrade to a multipoint EFI system.

So... what carb do you recommend? I was thinking around a 750-850CFM double pumper with annular boosters, but not sure who makes the best carb.

Thanks in advance.
Dave

For a street car I'd use an Edelbrock 800 AVS. They don't make as much power at WOT as a Holley but the Edelbrock will have better idle.

The double pumpers are good carbs and would be a good choice for a 4 speed big block car. The only draw back is that most (maybe all) of them are calibrated for the track and therefore are quite a bit rich for street driving.

After getting the suggestions here, call a few of the better carb builders and get their recommendations.

I have an 800 Edelbrock, which was on the original 383 when I got the car. I could not get rid of the off idle stumble. I'm not a great engine tuner, but I tried everything with that carb. It made it very hard to drive with a 4 speed!

DaveRS23
Who are the carb builders you would recommend?

850 DP Minimum............

While it won't necessarily make the most peak power, a 1.4"-ish venturi x 1.75" throttle bore with stepped downleg boosters will be more responsive on the street and fun to drive.

Thumperdart
What brand of carb would you recommend?

Put a six pack on it and never look back. For street/strip, they drive great, and get much better mileage than any double pumper. Good luck. Sounds fun.

So it runs like crap right....plugs look all un-even and its blubbery on take off.

First, I have to look everything up you posted to know what I need to know.

Cam has only 240 duration at .050" lift correct?

Next, your intake is a dual plane intake correct?

Cam recommends 750 double pumper right on their page!


Next, your problem is not the efi, its your timing curve. Since your running G1, it does not change or map the timing for you. I used that same system with almost the same cam with 80 less cubes with no issues. But I went and had my distributor recurved so I had 22* at idle....The standard Mopar distributors have way too much swing in them. It needs to be shortened. You need more timing and sooner with no extra total advance.

Next, your running a damn dual plan intake....Save yourself some money, pull it off, grind the center divider down and radius everything. Then add a 1" open spacer...port match the spacer to your intake exactly. change plugs, re-install intake and efi, and drive it and let it re-learn the fuel curve....

You will never beat the fuel map that system will give you with a carb, period. EFI does not fix other short comings in the combination. Motor wants fuel AND timing! Restrict either, and it runs like ........&$&$&*^98

If you want to get rid of the system, let me know...I have the perfect use for it right now.

Dragular grind divider thin, not downwards? As pictured?
Have you tried grinding the divider down? Like the MP engine books says to do on the LD-340?
Just wondering.

Quick fuel 850 s/s carb. Street strip carb, happy in both places

I had back to back timing slips, and when properly tuned, both were within .03 sec in the 1/8th mile. But the efi was cleaner, ran better, and didn't have to jet it for current conditions....

Take a guess how I know.....And personally, if I was to put a carb on his 440, it would be a Proform 750....They have had the best out of the box calibrations we have used to date.

A Thumper Carb

This is a very interesting article that applies here.
http://www.hotrod.com/articles/how-to-pick-the-best-carburetor-for-a-street-strip-car/

There are a lot of carb builders around and everyone will have a different opinion on who to use (and not use). But it is interesting to note that they all use the Holley 4150 platform to build from. Is there anyone building custom carbs off the Carter AFB or AVS base?

A google search will bring in a lot of info on carb builders. But, the opinions/experiences on them are all over the place and really do not help narrow down which one to go with. And a lot depends on how good a tuner you are. The better the tuner, the less he has to be concerned with what calibration he starts with. But a less experienced tuner needs to get a carb as close as possible.

Thumperdart, Holley, ProForm, Willy's, AED to name just a few.

I thought the Dominators I did for you out shined the EFI on the Hemi, and the 1050 Dommy out performed the "tried and true better than any" 4150" on the wedge............

I could get behind that.
Or an old school Holley 4781, or an AED HO-850.

I stay away from "race" carbs in that type of application....... The low speed calibration is usually too rich for me.

I would listen to the above.. you only had a
pump die on you but you arent happy with the
injection.. a pump is way cheaper and if you
listen to him you could get a better running
ride and a whole lot cheaper.. I went with the
multi point on my street rod..

I don't see em as a "race" or "street" carb but is it tune-able in all circuits and if so, easy enuff to do w/set screws, t-slot jets, emulsion and bleeds. A wide band makes the job easier for sure............

750 or 650 double pumper Holley parts are easy to get and car will haul tail. I still use TQs and AVS old style. A modified Q jet is nice for a street car with chrysler linkage MId 80s Dodge truck But Holley for overall performance period