If it has ever been discussed, I couldn't find anything. Porsche only says that they are better. How much is my question. I would think there would be a demand for the GT2 bits from 996tt owners.
While I'm at it, the Svc Info Technik says the diverter valves are different also.
Anyone??? I am dying to know.
Keep the boost up!
JR

 

5% more efficient. or 10 depends on who you talk to.

 

i posted something similar a couple weeks ago regarding the intercoolers. i would like to know myself. everyone says 5% all the way up to %20%. i think some data would be great in determining how much better they are.

 

i have a set of gt2 intercoolers if someone wants to buy them

 

I think the whole idea of the GT2/X50 cars was that the larger K24 turbos would put out less heat at .9 bar and all you needed was a slightly larger intercooler for extended track duty.

Of course we took advantage of the larger turbos by cranking them.

 

ari do you know where i can find literature about the x50 intercoolers.

 

If you are talking about changing ONLY the stock exhuast and I/C's to
the GT2 bits? I do not believe you would see ANY difference on the dyno.

Niether of those pieces are enough of a gain over stock to be worth putting
on your car unless you got them for free and put them on yourself.

I/C's worth a look:
flat sixes and Evoms or
Custom made ones.

MK

 

For relatively low-power cars (say, 600 crank and below), the OEM GT2 ICs and exhaust will work fine. Once you get above that level, you really need to go aftermarket.

 

would there be a difference between X50 GT2 parts?

 

You mean between X50 ICs/exhaust, Turbo 'S' ICs/exhaust, and GT2 IC's/exhaust? Nope.

If there is any difference...it's negligible at best.

 

Guys, I am seeing people make flat statements but I see NO facts!!! I can tell you that the Factory says the GT2 intercoolers "have a 5% higher cooling capacity than those used in the 996 Turbo". [Of course, the GT2 has different intercoolers, different exhaust, differnet ECU mapping with more boost, different diverter valves.] So, that 5% will mean more on a GT2 spec engine than if these intercoolers are bolted onto a stock 996tt. HOWEVER, they do make a difference and I bet this, perhaps small difference, would show up on a dyno as well. But, who knows?, Broad statements are just talk without repeatable tests.
JR

 

One more thing. You can still get the Factory Service Training, Information Service Technik, 911 GT2 2002, PNA 495 220 for about $25.00. Warning, this is not the totally detailed and thorough document that Porsche used to provide for its products, but you will find info you won't find anywhere else. This particular pub seems to have more info on the transaxle than anthing else. Of course, the trans is a lot tricker than most people realize. It is a great read if you are interested in the GT2 and it encouraged me to spring for one. There is a LOT that is special about the car and their intentions for building it.
JR
c

 

Not sure what your point is, since the people that have responded in this thread are only trying to answer your original question. If answers are not what you're looking for, then maybe you shouldn't have asked for them in the first place?

Regardless...many, many, many people on this forum have installed OEM GT2 IC's on thier cars. Similarly, many of the tuners on this forum have tried them as well. The OEM IC's are good to a point, but after that they simply don't provide enough airflow. 5% is small potatoes. This discussion is nothing new to us.

 

John,

please read my response and tell me what you do not understand about it.
I do not know what you are trying to accomplish but why would you want something that is 5 or 8% better if you can get something that is 50% better? If you want a quiet exhaust that gives you MORE power than the
factory one then the GT2 exhuast is not your choice.

MK

 

Welll, here we go into what could become a st**id pi**ing contest. ...My QUESTION was HAS ANYONE DONE A DYNO TO SEE WHAT THE ACTUALLY DO. That was what I was getting at. They DO accomplish something. Contrary to what you claim, I DO believe you will see a difference. Small? Probably. BUT unless yo have done a good dyno comparison you are just giving your opinion and that is not a fact. The QUESTION is WHAT - HOW MUCH?? Not is someone's aftermarket part better and makes more power. Nor if people have used them and found something better. However slight the performance increase may be, there is a reason that the guys at the Factory bothered doing this and convinced someone it was worth tooling up and producing them. I am well aware there are alternatives but the question I was hoping might be answered was: Has anyone actually compared these on a dyno and can give specific anwsers. So, NO, no one has answered the question. If I want to know what is the best performance upgrade I can simply do a search. Searching didn't answer my question or I wouldn't ask it. It would appear that no one has done this. End of my comments.
JR