Power brake conversion question - The 1947 - Present Chevrolet & GMC Truck Message Board Network

7Hotrod1 · 09-03-2008, 10:34 AM

I bought a new brake booster kit from CPP. The problem I have is that my Edelbrock performer intake has 2 vacuum locations, 1 is going to the transmission and the other goes over to the valve cover. There is a smaller one on the rear of the Edelbrock carb but is a smaller size than the fitting that was supplied with the booster kit. Do you think I can just get a smaller fitting and hose for the booster or do I need to do put a "T" or something in the line that is going to the transmission? I do have this question out to CPP but would like to get this figured out pretty quick. Thanks for any help.

Keep on Trucking · 09-03-2008, 11:18 AM

Do it either way just make sure you are getting manifold vacuum. My preference is a tee or a multi port fitting for the intake.

Wrenchbender Ret · 09-03-2008, 04:23 PM

The one to the valve cover should be on or close to the carb. It seems the performer carb has a 3/8 vacuum outlet at the rear of the carb. There is a opening in a runner in the manifold in back of the carb. This works good for the power brake & can be t'd with the trans. hose. The trans can be hooked to the carb if there is a 1/4 tube with vacuum at idle.

7Hotrod1 · 09-03-2008, 09:33 PM

I got a fitting for the back of the carb and hooked the booster to that. I have good vacuum and believe this will fix my problem. Thanks.

09-03-2008, 10:34 AM	#1
7Hotrod1 Registered User Join Date: Aug 2008 Location: Highland,il Posts: 6	Power brake conversion question I bought a new brake booster kit from CPP. The problem I have is that my Edelbrock performer intake has 2 vacuum locations, 1 is going to the transmission and the other goes over to the valve cover. There is a smaller one on the rear of the Edelbrock carb but is a smaller size than the fitting that was supplied with the booster kit. Do you think I can just get a smaller fitting and hose for the booster or do I need to do put a "T" or something in the line that is going to the transmission? I do have this question out to CPP but would like to get this figured out pretty quick. Thanks for any help.

09-03-2008, 11:18 AM	#2
Keep on Trucking Registered User Join Date: Jul 2005 Location: League city/Houston Posts: 163	Re: Power brake conversion question Do it either way just make sure you are getting manifold vacuum. My preference is a tee or a multi port fitting for the intake. __________________ 1970 4X4, Big block 454, 4 speed, vintage air, Mahagony wood bed, Tilt, tach. Can have new owner for the right price. "Life is tough, its tougher if you are stupid" (John Wayne) My buddys truck for sale here. http://67-72chevytrucks.com/vboard/c...p?product=2676

09-03-2008, 04:23 PM	#3
Wrenchbender Ret Registered User Join Date: Oct 2005 Location: Overland Park, Ks. Posts: 5,216	Re: Power brake conversion question The one to the valve cover should be on or close to the carb. It seems the performer carb has a 3/8 vacuum outlet at the rear of the carb. There is a opening in a runner in the manifold in back of the carb. This works good for the power brake & can be t'd with the trans. hose. The trans can be hooked to the carb if there is a 1/4 tube with vacuum at idle.

09-03-2008, 09:33 PM	#4
7Hotrod1 Registered User Join Date: Aug 2008 Location: Highland,il Posts: 6	Re: Power brake conversion question I got a fitting for the back of the carb and hooked the booster to that. I have good vacuum and believe this will fix my problem. Thanks.



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