Doing my LSXRT swap this weekend and all was going well. I got the manifold bolted down 100% flush with the heads all around. I can't imagine any vacuum leaks there, but we'll see.

My tuner (Patrick G) recommended the NW 92mm TB from Scoggin Dickey. I found it on WS6 store for about $40 less, so I got it from there instead.

So I go to bolt on the TB and this is the result. Picture shows underside of TB



This is obviously not acceptable and will very likely cause a bad leak.

Has anyone else seen this before? Are all NW 92 TB's created equal?

Scratching my head with this one...

 

weird. the car style is supposed to be able to run the stock 90mm tb. The truck should be able to also. But maybe you could make a thin spacer to make it work. Did you call comp yet? Or maybe where you bought the tb?

Whats the lsa on the cam youre running?

 

My nw 92mm did the same thing on the stock intake, worked fine.

 

I sent the TB back to WS6 store and Mike is going to send me a FAST 92 in exchange (plus the price difference).

which stock intake? this intake is 102mm, so I don't see how there could be the same issue with a stock intake.

 

here is the cam card. the cam was spec'd by Patrick G, with the LSXRT intake as part of the input.

 

I'd like to see how it runs. Seems like most people who have had problems are running a tight lsa.

 

Stock L92 intake.

You can just barely see it in this pic:

 

^ interesting. are you talking about the small gap on the right side?

 

I'll keep you posted. New TB should be in tomorrow, will try to schedule a re-tune ASAP.

 

No im talking about the gasket showing on the bottom (green) that you were worried about.