Some European tuners and some Us ones modifies the original turbos from 997tt and make them bigger in order from what I have understood to produce more air with lower presure.. What is your opinion on this?! They say that they can achieve with this mod 560hp on the wheels!!
If I do that I will have much more lag on my car?! Or as I have Vtg will be about the same?!
Is there something I dont know about this mod?? Any big dissadvantage...?! Maybe I will just destroy my Tiptronic?! Or the Engine!?

I have some problems here with some heavy modified 996tt and I want to give them a lesson...

 

Todd at Protomotive used a larger compressor inside the stock VTG turbos, with exhaust and a ECU flash. This setup made 560 awhp on 103 on a 997TT from Florida. As far as increasing lag, I haven't driven that particular car...but I imagine it's negligible.

 

That's the same Protomotive setup I was talking about. They are kinda/sorta sister companies. "Proto"....

 

I have that setup on my 997TT. While I haven't yet dyno'd the car -- the extra power proved too much for the stock clutch to handle (!) -- I can say (a) it's quite a bit faster than the car was when it had 470 AWHP and (b) the difference in lag is negligible.

Go for it !

 

I am just curios why all the competitors though of protomotive, havent produced yet bigger turbos...

 

bigger turbo=more lag

 

If the turbo is well mapped the lag is hardly noticable a few hundred rpms...

 

Your probably going to have to dump the VTG's to get serious HP numbers along the lines of highly modded 996 TT's - at least thats whats on the market currently. I'd think twice about a turbo swap with Tip cars - just stick to flashes and exhausts. I have no clue how much torque that thing can handle.

 

Generally speaking -Yes. But we are not talking about garrett GT42R turbos... now thats big.
Evoms, for example, has successfully done gt28r and gt30r garret turbos in KKK housing... not much lag there...
It can be done if the product is designed properly. going with lightweight compressor wheels... matching the hot housing accordingly will produce astonishing results.
markski

 

lag is usually primarily determined by the size of the turbine. Compressors have less to do with the lag, up to a point. The VTG turbine assembly can and has been mated to different compressor wheels and these products should be hitting our shores soon

 

You mean, from the factory? My car's already got one of these stock-turbine / larger compressor configurations, so I'll propose that they are already available?

 

I think he may be talking about some of the Euro tuners that are coming in a bit late to the game.

 

What is the size of the Compressor wheel in the new VTG turbos? Is it still the same old K24 wheel or bigger?