| Re: Throttle Body Connections |
Subject: Re: Throttle Body Connections by CentralCoaster on 2013/6/9 23:34:52 Yeah, its an 85, which has the stock idle air entering in the bottom of each intake tract, and he thinks it's related to the changes in idle air paths, but I disagree. It isn't any different than the later L98 in dumping directly into the plenum. I speculate that GM only had that idle air passage from the TB directly to the base because they wanted some air to help move the cold start injector fuel into the base. And when they got rid of it there was no need. I don't know where the PCV goes on the newer cars.. is it into that extra port on the passenger side of the throttle body or still to the intake base? You are correct that the intake runners would have more vacuum than the plenum, but I doubt it's enough to have any effect. Yes I guess that would mean the IAC would have to open a little further than it's used to to get the same amount of air. The amount of air moving through the runners at idle is small, so I can't imagine much of a pressure difference within the intake tract. |
