come on then guys fight it out....... im running manual trans, i used to have edelbrock vac sec's on my auto chevelle and loved it but i dont mind trying something different and im concerned ive herd people say mech sec's are beter for manuals so now i dont know which. this is a street car...........

 

double pumper holley for anything performance related over an edelbrock.

 

thats what im running

 

X3

 

Edelbrocks are mechanical secondary, not vacuum. They have mass air sensing flaps but the butterflies are what count, and they are mechanical. The Edelbrock 750 is my all time favorite street carb. They are nearly indestructable and have no wear parts.

 

hey, thanks for the heads up on edelbrock ;-)

 

I don't know if i'd say they've got no wear parts. They've got the same sorts of parts that wear out in any other similar carb like the accelerator pump cup (although every one that i've ever taken apart has had a relatively pristine cup with a chewed up pump bore, sort of like the circuit blowing to protect the fuse), needles and seats, and throttle shafts. They have no fuel passages through the bowls though, so they don't leak if the gaskets go bad. They're a simple design that's been in production nearly unmodified since the 1950s that anyone can install with reasonable certainty that it will "work" out of the box. If you're looking for something that will work as well as possible for performance use, you're better off with something else.

 

Show me an edelbrock w/ a worn out accel pump plunger or any other worn out moving parts. There is really nothing to go wrong on the Eddie carbs, unlike Holleys which have rubber diapgragms in the power valves and accel pump(s) which harden over time. The only gaskets in the edelbrocks are paper and are unaffected by whether the carb is left dry for long periods of time, or not. I ran quicker 1/4 mile times w/ an Eddie 750 than a Holley DP, on my 327, back to back. That won't always be the case for everyone's combo but that showed me that they do work fine.

 

never will the edelbrock run quicker than the same sized double pumper at the track if both are dialed in 100%. Not going to happen. With modern rubber seals on the holley, how often do you think they go bad? Every 10 years they need a rebuild?

 

A lot more often than that. But I digress. Use whatever floats your boat. I run multiport EFI and it's better than both setups, LOL. It all depends on what you're looking for.

 

this is my problem, ive herd that holleys are a bitch and un reliable but ive never herd any time spans in with it, are they just a bitch initial set up? do they ever need adjusting?? how often do they go bad??
if holleys were always faster then surely edelbrock would go bust!?

 

Edelbrocks sell because of wives tales about Holleys.

If you can't tune a Holley, you won't be able to tune an Edelbrock.

This forum is filled with threads about people that can't get their carb to work correctly. Most of the time, they are either leaving out vital information (such as what distributor they're using), or don't listen to (or can't comprehend) what they're being told.

My (unscientific) observation has been that of the people who never solve their problem, the Edelbrock users comprise the majority.

Of all the people I've known who have tried both types of carbs, only one went faster with an Edelbrock (and they switched to a Demon, not a Holley). They didn't know what they were doing with the Demon, never attempted to tune it; and this was about the time Demon started having QC problems, anyway. They never did try a genuine Holley - just put the Edelbrock back on and lived with the performance they had.

 

Well, personally, i will never use a Edelbrock, they are not bad but the fact is that the fastest cars out there that are carbed are ither Holley carbs or based off a holley platform, period. I love my 750 vac , it is really easy to tune. My 750 mechanical is a pain becayse i built it out of a proform main and quick fuel base, so parts are mix matched, i need a pro tp look at it, i use the mech and it works great in a straight line, but normal driving sucks, simply i think it is due to being a race carb so it will not perform like my vac sec under low RPM cruise. I am possibly asking too much out of it. I am going to atleast keep the mech sec for the track and severe street duty, but that is if i cannot get it to have better street manners.

 

If you stay out of the secondaries, the motor wont know what you are running as far as V/S or M/S. If your having trouble cruising with a double pumper its not tuned right.

 

proform = quick fuel. same parts. If you can't get the double pumper to do low rpm cruise then you probably have the jetting wrong on it. Take it out for a 10 minute drive at low rpm cruise, shut it off and pull a plug. Or buy/borrow a wideband 02 and tune from there.

 

For FAST stuff, I run MPFI or TBI, for the old work truck, I use either a Q-Jet or an Edelbrock. I prefer the Edelbrock carb over the Holley. You can go just as fast with an Edelbrock, a Q-Jet, or even a Thermoquad as you can a Holley or equivalent. I've even messed with a Predator with good success.