Carb Replacement?? '66 327 350HP

[74bigblock]

Friends original style replacement Holley is dumping fuel out of the front bowl repeatedly. He's had the thing apart a number of times, and no success at solving the problem. It ends up dumping excessive amounts of gas all over the intake.

He is considering a replacement, but would prefer something that will work with his stock air cleaner assembly. Any ideas out there that will allow him to do this?? I was thinking Demon, but not sure.

Thanks!
Dave

 

[Stan's Customs]

Just have your friend replace the floats and the accelerator pump...one or he other is the likely cause for the spillage. Providing of course he does not have excessive fuel pump pressure, which would force the needle seat open and flood.....on this or any other carb.

A Demon will work too...just a big unnecessary expense unless he just wants to upgrade....and has the disposable geetus..

 

[74bigblock]

Just have your friend replace the floats and the accelerator pump...one or he other is the likely cause for the spillage. Providing of course he does not have excessive fuel pump pressure, which would force the needle seat open and flood.....on this or any other carb.

A Demon will work too...just a big unnecessary expense unless he just wants to upgrade....and has the disposable geetus..

He's really looking to replace it at this point. Looking for ideas/experiences

 

[Grizzly]

Road Demon

He's really looking to replace it at this point. Looking for ideas/experiences

Replaced my Holley that was putting gas everywhere but where it was supposed to with a 625 Road Demon with electric choke. Bolted it on, adjusted the idle, have been driving it ever since. Couldn't be more happy.

I called BG and asked them to give me a part number I could give to Summit. Couldn't have been easier.

 

[Marlar]

Replaced my Holley that was putting gas everywhere but where it was supposed to with a 625 Road Demon with electric choke. Bolted it on, adjusted the idle, have been driving it ever since. Couldn't be more happy.

I called BG and asked them to give me a part number I could give to Summit. Couldn't have been easier.

My experience with BG has been just the opposite. I bought a small Road Demon over a year ago after giving BG the info on my '65 327. They said it "should work fine with your application". It didn't and wouldn't. I bought a 600 cfm Edekbrock and like you, took it out of the box, bolted it on and it performs awesomely. i have asked BG twice now via email for some suggestions beyond what I have already done and the silence has been deafening. No way to treat customers and win more customers. It is a pretty thing that does not work. As near as I can determine about 50% of those who buy them love them. same seems to go with Edelbrock, Holley, others. That is a coin flip set of odds. i am 'tuning' the thing on a 350 c.i. by installing much larger squirters, jets from 0.058 to 0.070 and then a different power valve. If it will run perform even marginally, I will sell it cheap.

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[Lucy64]

I just bolted a new Holley Street Avenger on my 64 yesterday. It was everything that they claimed. All I had to do for adjustments was about 100 rpm increase on idle speed and a slight adjustment on the misture. I had a Edelbrock Performer that gave me problems for the past year. I had that carb off and rebuilt and it still was not right. The Holley right out of the box solved my problems.

 

[Marlar]

I just bolted a new Holley Street Avenger on my 64 yesterday. It was everything that they claimed. All I had to do for adjustments was about 100 rpm increase on idle speed and a slight adjustment on the misture. I had a Edelbrock Performer that gave me problems for the past year. I had that carb off and rebuilt and it still was not right. The Holley right out of the box solved my problems.

Reinforces my experience. 50-50 chance of working perfectly right out of the box regardless of brand!!

otfl

 

[Stan's Customs]

Reinforces my experience. 50-50 chance of working perfectly right out of the box regardless of brand!!

otfl

I agree with that...maybe even less than 50/50. I have determined that the original stock carburetors are usually a "much" better carb than the replacement Holleys or the like, many of which have plastic internal pieces.

Factory carbs can usually be easily repaired....and are jetted right for the application etc. etc.

Again fuel pump pressure can make any carb misperform, even new...check that first.

 

[Tom Bryant]

I agree with that...maybe even less than 50/50. I have determined that the original stock carburetors are usually a "much" better carb than the replacement Holleys or the like, many of which have plastic internal pieces.

Factory carbs can usually be easily repaired....and are jetted right for the application etc. etc.

Again fuel pump pressure can make any carb misperform, even new...check that first.

I just sent my original '66 Holley to Bob Kunz in St. Louis per JohnZ's recommendation. It's an OEM carb off of a 327/300 in a Chevelle or Nova but is identicle to any other GM small Holley. I decided to have this carb done for the reasons Stan says and the Offenhauser manifold I'm using on the old yellow truck project is cast for the original GM choke setup.

Bob not only cleans and rebuilds these carb but completely remachines them so they are better than new. They get run on an engine before they are returned to the customer too. I'm just going for the street rebuild but he also does NCRS restorations of the best quality. I talked to him for a while the other day and he is a very nice guy that goes over in detail what will be done. I'm expecting to pay around $250. for the work but as I said, it will be better than a new one.

I'm including a fuel pressure regulator with liqued filled pressure guage and a big fuel filter with replacable element in the new system; hard lines of course.

Tom

 

[SIXt7]

I bought a Holley for my 67 327/350 from Jeg's two years ago. It's the model prescribed for a 66 but it performs great...only problem was that I had to exchange two carbs before I got one that didn't geyser gas everywhere. Jeg's was great and took care of all the excess shipping...even shipped next day delivery.