#487, "RE: port/polish etc intake manifold more.. 99gs" In response to In response to 1
My manifold needed some matching to match the 55TB but I say port the whole damn thing from top of the runners to the bottom. I matched it to the head as well (I had a head off but you can do it to a gasket as well). I ported until I just got tired of the work but no part of the runners went untouched. The TB and manifold together made for a noticeable gain in the low/midrange. I noticed a difference as soon as I blipped the throttle before even driving. Felt like someone had took 10lbs off the flywheel before even driving. Of course now months later car feels like stock again, hence the need for more mods.
