Holley carb question

[mazspeed]

Ok, one of the first times I was in my car and went to stop very fast the car died and my hydroboost lost pressure and just about lost the ability to stop. I was lucky. Now the car is back in the shop with a completely different set up yet this still very much bugs me in the back of my mind. It's a holly carb set up, and would like to be able to run the car as fast as I like and have the ability to stop quickly without it shutting off, making my brakes useless. What can we do to fix this? Will a mechanical pump help with this Jody?

[69bird]

How's your float level.

[mazspeed]

How's your float level.

It was at the stock setting, whatever that was at the time. Now the motor is boosted with a hat, so I don't know if this will hurt it or help it.

[camcojb]

are you using a mechanical or electric fuel pump?

Jody

[mazspeed]

are you using a mechanical or electric fuel pump?

Jody

That's being changed, I think it was a Holley as it was LOUD. With the return line and other fuel stuff with the supercharger, we are putting another one in. From what I understand, fuel slosh in deceleration is causing fuel to jump out and pop back in the carb opening causing it to stall at idle engine speeds. I believe this too be true, but I don't what this happening again. Very scary.

[69bird]

I have a 69 firebird procharged. Only ran it with the carb for a short time. Could never get it to run right. Went to f.i. and never looked back. I know alot of people are running carbs with no problems. Did you send your carb out to be modded? Csu is the best I hear.

[mazspeed]

I have a 69 firebird procharged. Only ran it with the carb for a short time. Could never get it to run right. Went to f.i. and never looked back. I know alot of people are running carbs with no problems. Did you send your carb out to be modded? Csu is the best I hear.

The carb is being lightly modded at Campbell Auto, but nothing over the top or anything. I was thinking of going with a Holley ultra, but the carb tuning is going to be key. As far as the stalling, I'm still worried about it.

[69bird]

What did they do to the carb? If you go to turbomustangs.com you can down load directions to mod it. It's pretty involved. Thats what I did with mine.

[mazspeed]

What did they do to the carb? If you go to turbomustangs.com you can down load directions to mod it. It's pretty involved. Thats what I did with mine.
That's a big site, you have a link?

[69bird]

http://www.hangar18fabrication.com/blowthru.html
Here you go. I would start there so you can be sure your carb is done right to start. That could be your problem. Do you have a a.f. gauge to check on w.o.t pulls?

[mazspeed]

http://www.hangar18fabrication.com/blowthru.html
Here you go. I would start there so you can be sure your carb is done right to start. That could be your problem. Do you have a a.f. gauge to check on w.o.t pulls?
I don't but CAR the shop that is doing the car does. Ill check the link. Thanks again for that.

[Steve Chryssos]

Mine does that. It's a byproduct of those wonderful pro-touring negative g's. I avoid it by blipping the throttle after applying the brake. I also enlarged my idle transfer slots, raised my front float level and made sure that my rear brake bias is adjusted properly. If none of that helps, buy a nitrophyl float and shave the front of it just a little. You will need to seal the shaved area with some fuel resistent "dope"

It's a pro-touring tuning issue. No matter what carb you buy, you will most likely need to make the same adjustments.

[Rick Dorion]

I put a spark plug boot over the rear vent pointing backwards to prevent fuel slosh from stalling my car.

[mazspeed]

I put a spark plug boot over the rear vent pointing backwards to prevent fuel slosh from stalling my car.

That was brought up as a possible bandaid, buit I now have the supercharger hat. Might not be enough room.

[mazspeed]

Mine does that. It's a byproduct of those wonderful pro-touring negative g's. I avoid it by blipping the throttle after applying the brake. I also enlarged my idle transfer slots, raised my front float level and made sure that my rear brake bias is adjusted properly. If none of that helps, buy a nitrophyl float and shave the front of it just a little. You will need to seal the shaved area with some fuel resistent "dope"

It's a pro-touring tuning issue. No matter what carb you buy, you will most likely need to make the same adjustments.

Hey Steve, Ill mention it too them.

[Steve Chryssos]

That was brought up as a possible bandaid, buit I now have the supercharger hat. Might not be enough room.

That reminds me...Is your carburetor boost referenced?

[mazspeed]

That reminds me...Is your carburetor boost referenced?

In progress now. Yes it will be.