Holley 650 DP vs. Edelbrock 750 - Hot Rod Forum : Hotrodders Bulletin Board
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Old 05-02-2009, 02:23 PM
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Holley 650 DP vs. Edelbrock 750

Which carb would be better on a mild built SBC? I like the fact the 650 is a double pumper and you know it will open up when you floor it. The Edelbrock being vacuum secondaries will not open as quick, but it will flow more because its bigger. I have a choice between the two and I can't make up my mind.
This is a street car that will see the strip on occasion.

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Old 05-02-2009, 05:48 PM
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How many CI? Double pumpers are great for thier application, but the mechanical secondaries are not as forgiving as the vaccum secondaries on that 750 Edelbrock.

The Edelbrock will only take what it needs as where the DP is more of a "controlled fuel leak." either should work fine as long as your above about 350ci. Anything smaller and I would suggest something else. I have and use both including a 4165 650DP, a 4160 600cfm and 2 500cfm edelbrocks, (all properly tuned). I like the EB for the "set it and forget it" stay in tune deal, but the DP is more open to and fun to tune.
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Old 05-02-2009, 06:18 PM
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I like the DP's over the Eddy units mainly because I'm more use to the Holley. A buddy and I have a 72 318 Dodge Demon with a 650 on it. It runs 13.50 @ 102 with a stock converter. It's pretty slow off the line with a 2.2 60' and doen't turn on until about 3000 rpm. It's fun to run someone with a faster dialin and surprises them when they think they have it in the bag and then it walks away from them lol. If you know how to set up your carbs, either one will run pretty dang good.
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Old 05-02-2009, 07:56 PM
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Thanks for the replies, my engine is a 406. Most would say go with a 750. I never go over 5500rpm, sometimes just 5000. I've heard a double pumper will bog if you don't have it set up right. Thats why the vacuum secondaries are more forgiving.

Thanks for your time
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Old 05-03-2009, 09:30 AM
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I had a 750 DP on a 383 Mopar years ago and if I nailed it really quick, it would pop but it never bogged but after a minor adjustment, it was fine. Had a 650 on a 360 in a pickup and it never popped or bogged and the 650 that's on the 318 never does either. Another car, a 440 with a tunnel ram and 2 750 DP tunnel ram carbs popped one time in a full season of racing. All vehicles were automatics with factory stock hipo converters. Do ya know anyone that has one or the other that you could borrow? Too bad you ain't near me as I have just about every DP made up to 850 plus a 950 HP....I think a 650 would do just fine on a 406 or even a 750....
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Old 05-03-2009, 11:52 AM
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Thanks for the reply. Last year I tried my brother in law's 750 DP and I couldn't tell a very big difference over my 600 Holley. It wasn't enough to pay $450 for a new 750. It did hesitate if I hit the throttle real fast. It was tuned to his car and not mine.
Thanks again
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