carb gods help please

WADS56 · 03-19-2003, 10:15 AM

I am new to the carb thing and don't know much about them so I could use some help. I bought a "Holley 750cfm HP with mechanical secondaries tuned by Reed's performance" from Ebay. After looking the carb over I noticed that the airbleeds have been removed, and two holes have been drilled on the front throtal plates. Why would they do this, and will this thing even idle like this?
What do "screw in air bleeds" do anyways, and what is the point of them? Also on the metering blocks there is two screws... what do they do? There is also a number wrote in marker on top of the fuel bowls. I think it said 58 but I know for sure it was ?8. What would that number mean?

Thanks,
Wade

Murdock · 03-19-2003, 12:26 PM

Air bleeds atomize the fuel before it hits the barrel. Having "screw in" air bleeds allow you to change the atomization of the fuel.

The two holes in the throttle plate are there to help the idle on the existing car, think of those like and IAC solenoid on an EFI car.

The two numbers on the bowl are the jet sizes that are in the carb.

Murdock

WADS56 · 03-19-2003, 01:41 PM

Quote:

Originally posted by Murdock
Air bleeds atomize the fuel before it hits the barrel. Having "screw in" air bleeds allow you to change the atomization of the fuel.

Murdock

They took the air bleeds out completly. They didn't drill them out or anything because I can see the threds. IS this a normal thing when they tune a carb?
Also, what about the screws on the sides of the metering blocks? What do they do?

Thanks,
Wade

PKRWUD · 03-25-2003, 12:56 AM

Quote:

Originally posted by WADS56
Also, what about the screws on the sides of the metering blocks? What do they do?

Thanks,
Wade

Idle mixture. I believe i posted a thread in the Tech Tips forum at RHC that tells you how to adjust them properly. If it's not there, hit me up later and I'll walk you through it all. Carbs are easy.

Take care,
~Chris

WADS56 · 03-25-2003, 09:52 AM

thanks

03-19-2003, 10:15 AM	#1
WADS56 gear banger Join Date: Aug 2000 Location: CHICAGO Posts: 1,144	carb gods help please I am new to the carb thing and don't know much about them so I could use some help. I bought a "Holley 750cfm HP with mechanical secondaries tuned by Reed's performance" from Ebay. After looking the carb over I noticed that the airbleeds have been removed, and two holes have been drilled on the front throtal plates. Why would they do this, and will this thing even idle like this? What do "screw in air bleeds" do anyways, and what is the point of them? Also on the metering blocks there is two screws... what do they do? There is also a number wrote in marker on top of the fuel bowls. I think it said 58 but I know for sure it was ?8. What would that number mean? Thanks, Wade __________________ 79 Hatch: NA 347, Stage 2 Canfield Heads, Victor JR. Intake, Blueprinted Holley 750 HP, Solid Roller Cam, Shooting for 10's on motor 93 LX: Tremec, dual friction clutch, fms flywheel, Hedman shorties, O/R H-pipe Ricer hater's club member #49

03-19-2003, 12:26 PM	#2
Murdock Registered Member Join Date: Dec 2002 Location: Columbus, OH Posts: 100	Air bleeds atomize the fuel before it hits the barrel. Having "screw in" air bleeds allow you to change the atomization of the fuel. The two holes in the throttle plate are there to help the idle on the existing car, think of those like and IAC solenoid on an EFI car. The two numbers on the bowl are the jet sizes that are in the carb. Murdock __________________ LARZRACECARS larzracecars.com

03-25-2003, 09:52 AM	#5
WADS56 gear banger Join Date: Aug 2000 Location: CHICAGO Posts: 1,144	thanks __________________ 79 Hatch: NA 347, Stage 2 Canfield Heads, Victor JR. Intake, Blueprinted Holley 750 HP, Solid Roller Cam, Shooting for 10's on motor 93 LX: Tremec, dual friction clutch, fms flywheel, Hedman shorties, O/R H-pipe Ricer hater's club member #49

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