Good carb?
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Freshman User
Joined: Apr 2012
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Good carb?
i have mild built 400 comp 268 cam roller rockers bored .30 over sealed power bottom end. i have a edelbrock 750 on it now and its to big. i was thinking an edelbrock 650 or holley 670 and ideas. has performer 400 intake
Fleet Mechanic
Joined: Jan 2012
Posts: 1,668
Likes: 13
From: Saskatchewan
I used summit racing's 600 cfm carb on my 400 and I'm very pleased with it over all. Trucks got massive power good mileage and it starts great. There also cheaper that most other carbs. Good luck.
Post Fiend
Joined: Apr 2008
Posts: 8,261
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From: Big Sky Country
Either carb would make a great selection, they're both good carbs, both also have their pros and cons, i'm partial to Edelbrocks myself.
More Turbo
Joined: Mar 2012
Posts: 724
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From: Southeast Salt Lake, UT
Stock intake? I'm looking for alternatives to the factory 2150 but can't afford to replace carb and intake at once. Really need to get better mileage.
Fleet Mechanic
Joined: Jan 2012
Posts: 1,668
Likes: 13
From: Saskatchewan
Nope, weiand intake, tmyer pistons, comp cam xe 256.
Certified Thread Hijacker
Joined: Aug 2001
Posts: 14,441
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I would suggest an Edelbrock 600 cfm Performer myself, but you aren't going to notice that much of a difference between the 600 and 750.
Not enough to offset the costs involved anyways, unless you found the 600 used and sold the 750.
Josh
Not enough to offset the costs involved anyways, unless you found the 600 used and sold the 750.
Josh
Fleet Mechanic
Joined: Feb 2004
Posts: 1,508
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From: Arlington,Wa
I've been using a Carter 625 with similar mods....no complaints. I ran an Eddy 750 for a while and didn't notice anything different, so I went back to the 625. I think if you stay in the 600-650 cfm range you will be fine. As for carb brand, that's all a matter of preference. 
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Cargo Master
Joined: Nov 2009
Posts: 2,364
Likes: 117
From: starship enterprise
I think a 750 is a little big on a 400, but that is my $.02. I like holleys, they run pretty good. Mine have all been really awesome for an all around carb. One thing to remember with holleys truck avengers is that holley will warn to NOT tow at all with these carbs. I towed a little bit with mine, and it seemed to lean out real easily. Something with the check weights for the extreme angle operation. Edelbrocks work decent all around. I never saw the performance out of an edelbrock i got from a holley. I like holleys 600 or 650 cfm carbs, they work really well and are easily scored at a junk yard, throw a kit in one and go. I know a holley of the same cfm rating will out perform an edelbrock, especially in the 750 cfm and up. However, if you don't have a race car, edelbrocks drive down the road really nice. Good luck.
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