holley or edelbrock carb...??

[camaronumerouno]

k so i've heard that holley kicks ass as far as carbs go...but is the 'brock still gonna have moderate performance and relatively easy tuning with a smaller price tag on it....and should 500cfm be good for my basically stock 305, or should i go more for 600 ?

[justlearning]

well i dont know anything about carbs so dont take this to heart but just from what ive heard on here edelbrocks are much easier to tune if ur new to carbs and as far as size goes i have a tbi and i belive my stock throttle body is bigger than 500 cfm, and the after market ones im looking at are like 670 cfm but it could be much different for a carb...but if you are converting to a carb youll have to change your fuel pump cause if u had fuel injection then it will be much to strong and i belive they said it will blow the needle open or something

[demon9766]

Originally Posted by camaronumerouno

k so i've heard that holley kicks ass as far as carbs go...but is the 'brock still gonna have moderate performance and relatively easy tuning with a smaller price tag on it....and should 500cfm be good for my basically stock 305, or should i go more for 600 ?

Well the e-brockis easy to tune but so are road demon JRs and they preform better ,and u don't have to change the fuel pump just get a regulator,and set it between 3,and 6 PSI.

[Rod&Custom]

I think Edelbrock is the way to go. In my experiences(and friends) Holleys have been nothing but trouble with tuning, and just giving out. If you are looking to build a race car though, the Demon series by Barry Grant is the best way to go. If it is just a replacement carb I wouldn't go with anything over 650 cfm, everything else would be too much.

[cnassiri]

After years of experience building hi-po motors I can tell you the decision is easy: 600 CFM Edelbrock - the Edelbrock is a better street carb for many different reasons: easier to tune, cheaper, build better, more reliable. Holley's are great for all-out hi-horsepower efforts, especially in the hands of an expert, but the Edelbrock is a no brainer solution that you will be ultimatly more happy with. Get the 600 CFM version, it won't hurt hp, and it will give you more fexibility in the future when you add more performance parts.

A 500 CFM carb will limit your hp to under 375 hp. There a lot of exceptions to this, so don't jump all over me with VE calculations that prove 500 cfm can support 450 hp, on paper it can, in real life, it will be a major restriction in the intake tract.

If you have questions, feel free to contact me by email: [email protected]

Cyrus
Owner - Torque Vendors Racing

[camaronumerouno]

so as long as im not working for over 300 hp ...a 500 cfm brocky should be good ?

[cnassiri]

A 500 cfm carb can support 300 hp, but it will be a stretch. It will limit the effectiveness of any mods you do. But it will let you get to 300 hp.

Cyrus N. Owner -Torque Vendors Racing

[camaronumerouno]

im also lookin at a performer intake so should i go for the brocky 500 or 600 cfm....??

[tacoma man.]

go with the 500, my brothers car has a 750 edelbrock on it and the engine was a 305 but we had it bored over to a 309. it still runs rich, and is looking to put a 500 cfm on his

[camaronumerouno]

will 600 be too much ?

[cnassiri]

Here are some solid facts that will help you with your decision: There is a formula that most carb guys have used for years, it's not exact, but it will give you a good approximation of what you need:

Carb CFM = (Engine Displacement * Max RPM) / 3456

In your case 305ci *6000 rpm / 3456 = 530 cfm.

This formula shows you the minimum carb size you'll need given a certain rpm - 6000 rpm in this case. If you never plan to rev your engine past 5500 rpm then the formula gives you 485 cfm.

So in you're case, you're right in between. The 500 cfm carb will do OK for your engine, but at 6000 rpm it will be choking your engine badly, and costing horsepower. In this case I would error on the side of going too big.

I'm sure you've been told not to get a carb that is too big, and that a big carb will cause you all kinds of problems, but stories about big carbs ruining a motor have more to do with guys slapping Race prepped Holley 750 double pumpers on a stock 302. Clearly the engine is way over-carbed.

In your case, a 600 is slightly large, but it won't hurt performance or driveability at all, on the other hand, a 500 will hurt performance, and it doesn't leave any room for performance improvements. Plus, if you later drop in a 350 or 383, you'll definitely have to get a new carb, the 500 will suck the life out of a bigger engine, but the 600 will do just fine.

It's your call, either way, you won't be disapointed, but for my money, I'd go for the 600.

Another thing to think of: If you ever go to sell the carb, the 500 won't be worth anything (not much market for them), on the other hand, if the 600 is still clean and funtioning, you'll get top dollar for it.

Cyrus
Owner - Torque Vendors Racing

[camaronumerouno]

thanks cnassiri...that is the best answer that i could ask for...i will def go with the 600

[tardster]

I have an edelbrock 1406 carb on a performer intake sittin on a 350 4 bolt main, car runs pretty good but my problem is the damn thing runs way to rich (you can smell the gas bad) anyway i've screwed in both adjustment screws trying to lean it out but all it does it make it run shitty. A freind said something about edelbrock can only handle about 3lbs of pressure and that i need to get a feul regulator on it but i dont know, any ideas here because I was reading this post and everyone is saying how edelbrocks are so easy to adjust and how there the best. Anyway any help is appreciated.

[fierangero]

eh...im pretty sure comparing holley and edelbrock is like comparing honda to acura. its the same company. yes they may be different quality products (somehow...), but its more than likely the name you are paying extra for.

[Robs71Nova]

In my experiences, one carb really isn't better then the other. The only real advantage about Edelbrock's is their ability to hold a tune. You get it adjusted right, then you wont have to worry about it again for a while and its reliable. For a racing engine, your usually always tuning under the hood anyway so I would personally go with the Holley.

Rob