Which carburetor would add more horsepower to a 351w, a Edelbrock 1406 600 cfm, or a Holley 670 cfm?

 

That's a really loaded question that would take a book to cover, then it would be specific to a particular engine but basically if they are both vacuum secondaries, and the jets etc optimized on a dyno the HP should be virtually identical. The only difference would be if you just bolt each on without optimizing them, then it's a crapshoot as to which one happens to be closer to what your engine needs out of the box. The rest of the engine determines the max HP the engine can develop.

 

If it's a stock setup, you won't see any difference. If you want to take it out of the box and bolt in on, either one. If you want it to perform to it's max and you understand how to tune a carb properly, then the Holley is the best bet.

 

If you're planning on running your engine on the street for normal driving, I prefer the Edelbrock. Their tuning manual and availability jets and stepped needles for power enrichment and normal metering through the main metering jet makes it pretty easy. Yes...you can get the same adjustments with a Holley as well. I just think Edelbrock did a better job than Holley in putting together the owners manual. It is designed to help average guys tune relatively well.

This question is bound to get some vehement responses from both political parties...er... make that both carburetor owners groups! I happen to own both kinds (not for the same cars). I guess that makes me a moderate.

Somewhere around 600 cfm size is a good size for the 351w by the way.

Dan

 

I also have both carbs ,like edelbrock simple design and the HOLLEYS PERFORMANCE

 

Go with the Edlebrock for simplicity. Also, they cost less. Jag

 

I've used both. Can't tell any difference. The main thing is to use the right cfm for your engine. On the 351 I would use a 600 cfm for better throttle response unless your engine is highly modified...

 

Neither, HP potential is determined by other items within the engine, the carb is used to optimize fuel delivery for the best results with the other components. If you need to ask that question I say you should go with Carter/Webber/Edelbrock (all have sold this style of carb) AFB style carb as they are more user friendly for people without a lot of carb experience. There are a lot of things to consider beyond just the ci displacement.