Which is better performance wise? Edelbrock 600 cfm or Holley 650 cfm


80 F150

 

Edelbrock 600

 

Holley, hands down. The cfm rating and carb style also has a lot to do with it, a 650 Mech secondary Holley will be too big for a stock 302, but fine with a 302 with aftermarket heads and cam.

 

if you dont know that much about carbs go with edelbrock

if you know more than the average joe about carbs go with holley

tuning a edelbrock-you buy a kit, change out some metering rods, and thats about it.

tuning a holley- there is so much you can do with a holley, jets, drilling jets, power valves, power valve block offs, squirters, swapping metering blocks, drilling metering blocks, accelerator pumps, it goes on and on, but if you don't know what your doing you'll probably never get the holley to run right, and swear its the biggest waste of money

edelbrock: comes with a owners manual tells you everything you need to know

holley: no owners manual, but you can buy a book, probably need to buy a couple books, never found just one book that tells you everything about a holley. or you find a old timer

 

I can tell you that between the two carbs- straight outta the box- on my mildly built 352 in a 65 F100, the the edelbroc stomped the holley.

Sorry holley fans, I like em too, but the edelbroc simply outperformed the holley.

By mildly built I mean, carb, intake, headers, cam, dist, coil, wires are all high end components. It's not stock.

 

For 99% of applications, you don't have to do 90% of what you just listed. You've mislead everyone who doesn't know better and shown your ignorance when it comes to a Holley carb. Holley's are simpler to tune than an Edelbrock, there's one less part to deal with and that's the metering rods. Very seldom do you ever have to change powervalve sizes in a Holley, sometimes a jet change is needed, but only sometime. Otherwise, out of the box, a Holley has about 3-4 adjustments to do, idle speed, idle mixture, secondary spring tuning (if you want the secondaries to open sooner),& accellerator pump arm clearance. And once you've done these, very rarely does any Holley need further adjustments,--------------for years sometimes.

 

Have Edelbrock 600 cfm carbs on my engines.I'm tempted to try a 650 cfm Holley.


80 F150

 

If you have a stock to mild 302, a 600 is perfect. Bigger isn't always better when it comes to carb sizing. Here are a few list numbers for Holleys to choose from: 600 cfm vacuum secondary--- 80457, this is the Ford version of the list 1850 600, only difference is the Ford kickdown linkage for automatic transmissions. List 80570 is a good size too, this is the 570 cfm Street Avenger. Then there's the Truck Avenger, the only one I'd choose for a stock to mild 302 is the list 90470 (470 cfm), the 90670 would be a tad too big to suit me, but it would still work, just gives up some throttle response, but allows for future mods to the engine. For a mech secondary carb, go no bigger than a list 4776, I'd only recommend this carb for a drag race or any other off road race application, the double pumper carbs are not fuel efficient, they're race carbs, not daily driver street carbs. Holleys are not hard to tune, nor are they prone to "get out of tune", anyone who tellls you that BS, is just plain ignorant when it comes to carbs. 90% of the time when it seems the carb is out of tune, it's always an ignition or other problem causing it.

 

thanks for the info baddad457.



80F150

 

for street applications you dont "have to" do anything i said that you "can do" for a holley, for racing you still don't "have to", but you "can"

in my experience drag racing i used a holley, my dirt track midget i use a holley (rules state 2 bbl anyway) and it uses some of the mods and tricks i mentioned earlier, you gotta squeeze everything you can and stay in the rules.

i dont see how a holley is easier to setup out of the box than an edelbrock with two mixture screws, and idle speed, and thats it, but whatever, i prefer edlebrock for street, and holley for race, cause of all the things that you "can do", i said there is so much you can do with a holley, not there is so much you have to do to a holley.

bro107 asked for opinions on "performance" he was kind of vague, so i dont know if this is his daily driver that he wants to stomp on, or this is a full race car, so i tried to give him generalized information so he could make up his own mind what would suit him,

i guess baddad knows whats best for everybody, since your telling people what carb to go with, when you dont even know the application, your in S. Louisiana- sea level, and humidity, bro107 could be in colorado at 5000ft. elevation, or SoCal seal level and dry heat, how do you know, he was too vague, how do you know its even for a 302, but you assumed that too. just telling people what to run isn't helping, if bro107 runs what you told him and doesn't know why, other than some guy told me to run this, then he's a fool. I tried to give some background so he could make his own decision, and know why.

so before you start calling me a liar, and ignorant on the subject, you should read the post fully, well you just showed your reading comprehension skills, so maybe you should read the post a couple of times before you reply.

if you didn't agree or understand what i said you could have questioned me alot of different ways, and i would have been happy to explain myself, but the way you did it calling me names, thats just bad manners.

thats why i've been a member for awhile with hardly any posts. too many know it alls

 

Just checking things out guys,haven't decided on anything .


80F150

 

Ok, so NOW you go and try to clarify and backtrack on what you posted earlier. Go back and reread what you posted, it's plainly obvious to anyone that you were steering everyone away from a Holley. For you to deny that is silly. Nobody called you names,(go and reread that too, where was it anyway? I sure can't find it ) I just called your posting misleading. If you don't like my making specific carb number recommendations, tough ****. I didn't see you doing anything other than stating generalities in that regard. I see too many people who are new to carbs make bad choices, simply telling them one brand is better over another is not helping them make wise choices.

 

whatever,

im not gonna get into a pissing match with you, you help in your way, and i'll help in mine

you said:
"I see too many people who are new to carbs make bad choices, simply telling them one brand is better over another is not helping them make wise choices."

but before that you said:
"Holley, hands down. The cfm rating and carb style also has a lot to do with it,"

yeah, whatever.

 

For performance HOLLEY

That was the ? right.

 

Ah, the old "which is better, blondes or brunettes" paradigm.

Just pick one and learn how to make it run right. For a truck that spends most of its time on the street you can make either work just fine.