Autolite 4100 Spreadbore from Pony Carbs (It's on a mildly warmed up 289)

 

I'm running the 570 Street Avenger on mine, got it tuned nicely, just need to fine tune the accelerator pump, just another squirter change or 2 I hope. My next carb will be a Pro Systems blow-through. The 570 is easy to tune though, I like it

 

does the street avenger have this problem: when i shut my car off the carb still dumps fuel into the manifold. my floats are messes up. since it dumps too much fuel, it doesnt want to start back up when the engine is warm. does the street avenger have this problem?

 

No, it does not. That sounds like a blown power valve, gravity draining into the manifold

 

I go Holly all the way. Easy to tune,cheap to rebuild.

 

Well said Starfury.

I think any answer to this question will be based on personal opinion more than anything else. I have an Edelbrock and have had absolutely no problems with it, but others have had the exact opposite results with the same carb. There are several existing threads here that discuss both the pros and cons of just about every carb manufactured. Do a quick search and settle in for a lot of reading.

Good luck, let us know what you decide on.

 

Needle valve's are dirty, power valve is bad or to much fuel pressure. Save the money and just fix what you have. A rebuild kit is alot cheaper than a new carb.

 

I'm running a Holley 650 DP with manual choke. Depending on the size and how built your motor is I have only heard good things about the Street Avenger 570.

 

I think Holley has under rated the 570, they must have tested it with a low depression. But yeah, the "best" carburetor really depends on the setup, what's good for one is rarely good for all.