Hey guy's looking for carb recommendations for my 72' Challenger. It's got a 71' 440 block bored 30 over, stroked(4.25) out to 505", redline about 6,500 rpm, 440 EZ-1 Indy Aluminum Heads, Max Wedge Intake, mechanical fuel pump, full reverse manual valve body 727 trans, Dana 60 with 355 gears, TTI headers going into a full 3" exhaust.
Car will be street driven with very little trips to the track planned. Holley tech recommended a 850 Street HP (link below).
What would you run????

Holley link:
https://www.holley.com/products/fuel_systems/carburetors/hp/street_hp/parts/0-82851SA

That carb would probably work fine. If it was my car I'd put a Sniper EFI kit on there. You'll be better off in the long run with EFI for a street car.

I like that choice of carburetor too

hi
holley 3916

best carb ever !

I would go with at least an 850 but an annular carb might work better with that 3.54 gear

Gus

Okay, you're running high flowing heads, high flowing intake, high flowing exhaust, 505 cubes. Why restrict everything with that 850 carb? I'd be looking for a 1050 Holley for that beast or that 3916 three barrel as stated above.

Cam?

Converter stall?

Sounds to me like the emphasis should be on drivability, not peak HP potential.

No such thing...

I have almost the identical combo and run a Demon 850 Speed Demon.

Most people initially think the car has some sort of fuel injection because it starts instantly, never loads up in traffic and puts up good numbers.

I could not be happier with a carb and used to run all Holleys.

1050 Dom.

Food for thought:

http://www.moparts.org/Tech/Archive/fuel/9.html

In my experience, an 850 would be a cork in that combo. My 500 was a bit milder than your combo and I started with an 850. Tried a 950 and went faster. Tried a 1050 Dominator and went faster still.

I also have a 1050 on my 540 Hemi. Both combos were primarily street.

Thumper can put a 1050 together for you that will rival any self tuning throttle body EFI. And certainly will start, run, and drive better than any OOTB carb, whether it is a 4150 or 4500 platform.

A Thumper carb will cost more than a generic carb, but a lot less than an EFI set-up and with fewer mods to the rest of the fuel system.

Did you use an adapter or change intakes when you went from 4150 to 4500?

Really? You're suggesting the guy put a Dominator carb on a street car? That seems like a bad idea, the guy clearly isn't building a race car and he doesn't have a 4500 intake.

Lack of hood clearance has kept me from trying an adapter. I have used Dominator flanged intakes and I have modified 4150 intakes to accept the 4500.

The 4500 mod is simple. Just thread aluminum bolts into the original bolt holes. Cut them flush and then drill and tap the new bolt holes. A little plenum massage is all that is left to do.

This isn't the race forum, why are you guys trying to turn everything into a race car?

BAD IDEA?!?!?!? Have you read any of the posts on here and elsewhere from happy Thumper customers? Many, many happy street cars running his Dominators. Including mine.

Why don't you try one Andy, and see for yourself?

The OP's combo is not particularly mild. He will run out of carb long before his anticipated 6,500RPM peak with a 4150. Why have what he has under the carb and then plug it up with too small a carb?

I've been driving 500 inch strokers on the street for the past 20 years and have used a bunch of different carbs. EFI works the best and I have no intention of every using a carb again now that I've switched, but if you aren't ready to switch to EFI then pick a carb based on your cam.

A smaller cam will let you run a street type carb such as an Edelbrock 800 or one of the less expensive Holley models. A performance cam will probably require a more expensive Holley carb with the extra tuning capability. A 750 high flow type of carb works great on the street. Holley used to sell them as 950 HP carbs.

If you have a performance cam and want a good carb with adjustment capability then contact BradH who posted above. He has a lot of experience with those types of carbs and he has a few of them for sale in the race section.

IDK fellas. Street driven w/3.55’s no matter what is upstairs is a car with long legs.
How often is the car running above 4500 @ WOT? The OP even said he is driving the street.
I believe the 850 would be a good compromise and still yet deliver.
You all can bla bla bla about what is being left on the table but I don’t see the OP chasing max power and every last pony possible.

See my thinking is that if you build a big block Stroker engine you want it to run great or why not just build a stock stroke engine to cruise around. Would an 850 work, heck ya but so would a 750. As far as fuel injection man have I heard some nightmare tuning stories getting them set up right. We all can’t afford taking to to someone’s dyno and paying them to set it up for us only to have it run different in the car.