3.6 DI Throttle Body, Ported Stock Intake Mani with gasket matched runners. Heres a comparison vs. stock. I'm guessing it may gain around 20chp across the powerband maybe not peak. Throttle response should be great. The porting on the runners isn't finalized. Still needs smoothed out with some high grit sand paper but all casting imperfections were removed. Its already much smoother than the cast. Had the opening at the throttle body machined half an inch larger.

 

How will tuning go with the new throttle body?

 

In for results, will probably drive kinda funny with that bigger TB, but it should flow better at WOT.

 

sub'd for home.

 

Good idea, but I bet this really screws with tuning. Good luck.

 

Just adjustment of fuel trims and the idle air control values. Same as tuning an lsj for an ls4 tb just slightly more drastic in the changes.

 

Have you done this? Because some of the peeps around here seem to disagree on opening up the intake manifold and throttle body.

 

If the car doesn't like it, I have the stock tb and intake mani sitting ready to be put back on it. It still may end up going back on it and sold with the car. But it was just some things I had sitting around that I bought in the past. I forget what shop did it but gasket matching the stock intake mani and porting the tb made the cars responsiveness and driveability better. I have them on facebook. Seems though the biggest issue comes from people doing their own port work on the head due to the way the flow should be across the valves for di.

 

I thought I remember ZZP trying a bigger or ported throttle body with lackluster results.

I really hope this works. Would help the big turbo cars.