Carb, Holly vs Edelbrock
Thread Starter
Racer
Joined: Dec 2003
Posts: 263
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From: Kernersville Nc
Carb, Holly vs Edelbrock
My carb is leaking from the pump and the side rod. It is a holly 750 vacume secondaris, maunal choke single pump. The engine is a 350 11 1/2 to 1 pistons, comp cam 280 duration 486 lift. I was thinking of getting a edelbrock carb. How are they compared to a holly?
Thanks Eric
Thanks Eric
Safety Car
Joined: Aug 2000
Posts: 3,711
Likes: 43
From: San Antonio TX
The physics of how a carb works don't change from manufacturer to manufacturer.
It's more of a matter of personal preference whether one chooses a Holley, Edelbrock, Carter, BG, Weber, or whatever.
If you're not into fiddlin' then it really doesn't matter. If you are into fiddlin', then the more modular (such as the Holley or BG and especially a Weber) the better.
It's more of a matter of personal preference whether one chooses a Holley, Edelbrock, Carter, BG, Weber, or whatever.
If you're not into fiddlin' then it really doesn't matter. If you are into fiddlin', then the more modular (such as the Holley or BG and especially a Weber) the better.
Le Mans Master
Joined: Feb 1999
Posts: 6,807
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From: Hoosier
Cruise-In III Veteran
Originally Posted by Garys 68
$35 for a rebuild kit or $300 for a new edelbrock. Rebuild it unless you want to switch to the mechanical secondary edelbrock.
Safety Car
Joined: Aug 2000
Posts: 3,711
Likes: 43
From: San Antonio TX
Originally Posted by Garys 68
Edelbrock square bore carbs are mechanical. They're just a shiney version of the old Carter AFB carbs.
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Melting Slicks
Joined: May 2001
Posts: 2,131
Likes: 4
From: May help you? You can sure as hell try!
I used to be a Holley guy just because that was the carb I was most familiar with. Then I bought a dual quad setup with Carter AFB's on it. When I started reading up on the Carters (Edelbrock sells the same under their name), I realized how easy they were to tune. The nice thing about the Carters is that metering rods, jets and power valve plunger springs, can be changed by removing the top cover and all is right there. The carb does not have to be removed from the vehicle to tune it or the bowls removed and gas spilled everywhere like the Holleys.
I always like the back to back compares when the carbs are swapped from brand A to brand B. One makes more power than another and the conclusion is instantly that the carb was the reason. When the fact is they don't look into how well calibrated either of the carbs were for that application or even attempt to tune them further. Where are the air/fuel numbers in these compares? That is what tells the true story.
I always like the back to back compares when the carbs are swapped from brand A to brand B. One makes more power than another and the conclusion is instantly that the carb was the reason. When the fact is they don't look into how well calibrated either of the carbs were for that application or even attempt to tune them further. Where are the air/fuel numbers in these compares? That is what tells the true story.
Melting Slicks
Joined: Dec 2004
Posts: 2,161
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From: pr, frederick md.
my vette had the 650 edelbrock on it when i bought it. this carb is so reliable, and stays tuned. ive always loved holleys but you always gotta mess with em'. the 383 im building is getting a bg speed demon, which suprisingly is cheaper than a new holley. rebuild the one you got 
Thread Starter
Racer
Joined: Dec 2003
Posts: 263
Likes: 0
From: Kernersville Nc
The reason why i was thinking of just getting a new one was that my brother in law and me rebuilt it 2 years ago for the first time since it was leaking out of the side accelerator rod ( it also developed a vacuume leak and stalled the car out before the first rebuild.). Before that i got 15 years out of it with no trouble. Now it is leaking out of the side accelerator rod and front pump on the bowl but running good.
Thanks for the info.
Eric
Thanks for the info.
Eric
Le Mans Master
Joined: Feb 1999
Posts: 6,807
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From: Hoosier
Cruise-In III Veteran
Originally Posted by gerry72
They're neither vacuum or mechanical secondary. They are air valve secondary. It's true that the throttle linkage acts directly on the secondary butterfly but there's no air movement until the air valve is overcome.
You explained it well. Bottom line, it's vacuum drop that makes the secondaries come to play.
Advanced
Joined: May 2004
Posts: 96
Likes: 0
From: Chippewa Lake Ohio
One advantage to the carter/Edelbrock carb is that the bow gasket is a dry type. the gasket is above the fuel and doesn't get wet and then dry out causing shrinkage. Gasket shrinkage is probably the only problem with holley carbs. The wet gasket dries and shrinks causing tuning changes. Noticed especialy after removal from storage. This is why some owners end up rebuilding Holeys every spring. Usualy they can get away with only replacing the gaskets and not messing with the setting.
Regards,
Heli
Regards,
Heli
Le Mans Master
Joined: Jun 2002
Posts: 8,339
Likes: 24
From: I can walk to MA
I used to be a Holley guy until I got the Edelbrock carb that
came on my 75 vette. I've had it for years ... never had to touch it.
Also, it has sat for long periods, only to wake back up as the bowls fill.
If your Holley runs good, then I agree - just rebuild it.
came on my 75 vette. I've had it for years ... never had to touch it.
Also, it has sat for long periods, only to wake back up as the bowls fill.
If your Holley runs good, then I agree - just rebuild it.
Thread Starter
Racer
Joined: Dec 2003
Posts: 263
Likes: 0
From: Kernersville Nc
Originally Posted by Brettmc
Try to tighten the accelerator pump housing screws.
Brett
Brett
Eric