I finished with the install earlier today. I couldn't get the nuts off the catalytic converter to remove the downpipe so I dropped the entire exhaust.
I had a coworker come over to help me do some stud excavation on the cat flanges, both sides. In the process we knocked some stuff lose inside the cat so I decided to gut it and buy a high flow one come smog testing time.
Gutting a cat is something everyone should do once in their life, it's a good form of stress relief.
I installed an ACT XT (Overkill, but hey you never know when I might randomly pick up megasquirt) with street disc and an 8lb Fidanza flywheel.
Anyways the rest of the install went without any hitches. I drove around for a bit without no exhaust after the downpipe just to see how it was and boy was that exciting. I love the ominous whistle of the turbine in the exhaust. Too bad I couldn't keep it that way lest I get pulled over by the law.
Had my fun, bolted up the rest of the exhaust and I was surprised to see the performance was still there, first gear actually became useless past 5k rpms. So between the flywheel and gutted cat I gained a massive performance increase, which one is to blame the most?
I love the flywheel so far and I've already put 50 miles on the new setup today. It gives a much more crisp throttle response perfect for heel-toe rev matching. I also switched to Pennzoil synchromesh transmission fluid from Redline MTL.
I have the wastegate actuator rod tightened all the way to make up the lost boost from the intercooler and made 5.5 psi (on the highway) before I gutted the cat. Now on the highway it gets up to 7! Is this ok or should I loosen the wastegate rod some?
I had to adjust the freeplay in the clutch at first to be able to shift out of neutral. I know this clutch is supposed to engage low, but I think it seems too low, the instant I move my foot it's already engaging. I sometimes have trouble shifting into gears even though I have my foot burried into the floor. I have the freeplay adjustment rod turned out as hard as I can with my fingers, is it ok to use a wrench on it or would that preload the throwout bearing? Or is there another adjustment to increase clutch travel?
Well that's all the questions I have for now