View Full Version : Hi Flow TBI

02-11-2002, 11:52 PM
anyone here use an aftermarket tbi on their 4.3 blazer? i wasn wondering if there is any change in manifold needed for a higher flowing throttle body. what i mean is if the throttle body is bored out to be larger will it be bigger than the holes on the top of the manifold? if so then the holes in the manifold would be restricting air flow.

also has anyone had any experiece with tbi parts from turbocity.com

any feedback would be great!


02-12-2002, 07:43 AM
I've heard good stuff from Turbo city, never delt with with them personally. I know that Holley makes better flowing TBI manifolds, but I think they're only for 5.7's I see your point on having a bigger throttle body, but still having the restriction of the intake. I wouldn't go bigger if you can't get a manifold to match the increased flow.