Intake Manifold Exhaust Block Off - The 1947 - Present Chevrolet & GMC Truck Message Board Network

skokie · 08-17-2005, 10:59 PM

Are you supposed to block off the exhaust port on the drivers side of the intake? If so why?

Thanks

JimKshortstep4x4 · 08-18-2005, 07:48 AM

Some guys block the ports, (both of them) to prevent heating up the carb on their drag cars. For street driven vehicles I think it is better to leave them open. They came from the factory open and outside of a small change in the way the exhaust sounds I have never seen any benefit in blocking them.

Warm up and driveability is affected adversly with the ports blocked.

Jim

08-17-2005, 10:59 PM	#1
skokie Registered User Join Date: Oct 2003 Location: San Jose Ca. Posts: 3,354	Intake Manifold Exhaust Block Off Are you supposed to block off the exhaust port on the drivers side of the intake? If so why? Thanks __________________ RIP to my son Dylan. 5/17/2002 - 8/18/2018 If you want to know more about rare forms of pediatric cancer or if you want to help fund pediatric cancer research, please check out the website for the non-profit I started. https://slothforpedcancer.org 68 build thread http://67-72chevytrucks.com/vboard/s...d.php?t=223234

08-18-2005, 07:48 AM	#2
JimKshortstep4x4 Senior Member Join Date: Jul 2001 Location: Muskegon,MI,USA Posts: 6,026	Some guys block the ports, (both of them) to prevent heating up the carb on their drag cars. For street driven vehicles I think it is better to leave them open. They came from the factory open and outside of a small change in the way the exhaust sounds I have never seen any benefit in blocking them. Warm up and driveability is affected adversly with the ports blocked. Jim



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