[sctravis77]

Are the Edelbrock Carbs any good? I was looking at getting a 750 CFM Edelbrock 9907 for my 93 mustang with a 351W.

[1slo5.0]

They run. They are not really a good performance carb. They are much more complicated than a Holley. I've used a couple Edelbrock/Carter carbs many years ago. I'll never use another one.

[jessemachone]

I'm the opposite. I never was happy with a holley. I foun'd myself spending too much time tweaking. With the carter / edlebrock I found them to be more of a set it and forget it carb.

[superbean]

there is no set it and forget it carb. It has to be tuned no matter what it's going on.

[jessemachone]

any holly I have used on a daily driver was a pain. I found myself tweaking it much more than I would have liked to. I agree that there is no set it and forget it carb because at the track, you will always be trying to squeeze every last bit of power out of it by tweaking it. Even the edlebrocks are easy for that - no fuel mess because everything loads from the top. The only thing that can be trickey is modding the point at wich the secondary air valve opens because they use weights.... you dont want to take too much off or you will have a turd.

I know other folks that love quadrajets. Everyone has their opinion and this is mine.

750 is too big for a 351. go with a 650.

[1slo5.0]

Originally Posted by superbean there is no set it and forget it carb. It has to be tuned no matter what it's going on.

Yep, but not if you have EFI

[1slo5.0]

Originally Posted by jessemachone any holly I have used on a daily driver was a pain. I found myself tweaking it much more than I would have liked to. I agree that there is no set it and forget it carb because at the track, you will always be trying to squeeze every last bit of power out of it by tweaking it. Even the edlebrocks are easy for that - no fuel mess because everything loads from the top. The only thing that can be trickey is modding the point at wich the secondary air valve opens because they use weights.... you dont want to take too much off or you will have a turd. I know other folks that love quadrajets. Everyone has their opinion and this is mine. 750 is too big for a 351. go with a 650.

Did your problems by chance exist with a new Holley or a used Holley. The reason I ask is because when I was a teenager and just starting out in this hobby I bought used parts because I had to. I could never get these old, used Holleys to run worth a damn. I was constantly messing with it. I buy new carbs for everything I put together now. I dial the carb in on the dyno which gets it pretty close. After a few passes at the track it is perfect. I never touch it again, ever. If I was a bracket racer I might rejet according to the weather, but I'm not a bracket racer.

750 is not too big for a 351. A dyno will prove that. I've ran a 750 Holley on a 289 several years ago....and it made more horsepower across the board than the 600cfm that I took off. Some 350 Chevys used a 795cfm Quadrajet. A carb that is "too big" isn't always a bad thing.

[GT347SC]

I ran an 750 edelbrock on my blown 347 for years and never had any problems. Never even touched it once it was set. I bought a new holley and never got it to work more than a day before i had to make adjustments again.

You will get alot of different answers to this question based on what each person had experienced.

[1slo5.0]

Originally Posted by GT347SC I ran an 750 edelbrock on my blown 347 for years and never had any problems. Never even touched it once it was set. I bought a new holley and never got it to work more than a day before i had to make adjustments again. You will get alot of different answers to this question based on what each person had experienced.

Knowledge is a big part. If you don't know how a Holley (or any other carb for that matter) works then you will have problems. 90% of the problems I see people having are related to having the wrong power valve in the carb. If a Holley is set up correctly and the carburetor itself is in good working order, you will not have to "adjust it all the time". That doesn't even make any sense if you think about it. Then again, if you aren't familiar with a Holley then it might make all kinds of sense....

[jessemachone]

They were used. I was in the same boat as you. I am plenty familiar with how they work.

I still think that a 750 is too big. 750 will work great on a blown 347 because it is operating on an engine that is more than 100% volumetric efficient.

Most of the problems i've seen with holleys is that people run them with an accelerator pump cam that is too big causing a slight surge when you mash it than it'll go. The problems I had was that the mixture needles always got gummed up causing a crappy idle.

Will I ever us a holley again? Sure. But on a daily I prefer the Edlebrock.

[86_Notch]

I think the reason holleys ( or any carb for that matter ) get a bad rap is because people are cheap bastards ! They'll spend 50 bucks on a swap meet carb, try to rebuild it then ( or just toss it on ) then bitch and moan that they're junk. Spend the money on a decent carb and you'll avoid a ton of headaches. Oh yea 750 is perfect for a 351. my buddy used to run a holley 750 on his mild 302 in his daily driven 85 gt.

[1slo5.0]

Originally Posted by jessemachone They were used. I was in the same boat as you. I am plenty familiar with how they work. I still think that a 750 is too big. 750 will work great on a blown 347 because it is operating on an engine that is more than 100% volumetric efficient. Most of the problems i've seen with holleys is that people run them with an accelerator pump cam that is too big causing a slight surge when you mash it than it'll go. The problems I had was that the mixture needles always got gummed up causing a crappy idle. Will I ever us a holley again? Sure. But on a daily I prefer the Edlebrock.

Think and know are two different things. I'll guarantee a 750 Holley will make more power than a 650 on that engine. I know this, I don't think this.

[1slo5.0]

Originally Posted by 86_Notch I think the reason holleys ( or any carb for that matter ) get a bad rap is because people are cheap bastards ! They'll spend 50 bucks on a swap meet carb, try to rebuild it then ( or just toss it on ) then bitch and moan that they're junk. Spend the money on a decent carb and you'll avoid a ton of headaches. Oh yea 750 is perfect for a 351. my buddy used to run a holley 750 on his mild 302 in his daily driven 85 gt.

+1

I had an 85 Mustang that I put a 289 in and it was my daily driver back in the early 90s. It had a 750 Holley. Putting that carb on was a night and day difference over the 600 that was on it.

I ran a 1150 Dominator on my black notch. That carb was way too big and I new it but I only wanted to buy one more carb and I would eventually need a carb that big. It was worth 13hp minimum across the board than the 1000HP that I originally had on it even though it was "too big".