Wow. Sounds like someone needs a nap.

 

OK,

Now I understand the question

NO; no one has ever done this
NO: no one will ever do this
NO: there is no point in trying this

 

Isn't the key here that the gt2 ics increased flow for track use. In everyday driving and stage I or II mods, does anyone really need the larger ics (especially if the car is only going to see on ramp and sporatic wot use? From what has been said in prior posts, it seems there is no need to swap ics unless you intend to make big power (over 600hp) or seriously track the car.

 

you need them. they make mad power. the bigger the better.

 

have evos ic had stock ic than tried gt ics evos are still on the stock ics are resting in a dark place sold the gts ice. yes i noticed a difference with the evos

 

you need them. they make mad power. the bigger the better...

Oak,

I love the good advice! LOL

MK

 

Interesting. Some people say X50 Tranny = GT2 Tranny. Any insight into this?

Also is there a similar part number for the TT or X50?

 

Sorry i do not. All that I know is that the X50 engine and tranny (less trans cooler) seem to be exactly GT2 parts...

production began at about the same time as well.

 

Ok, I had my nappy and I feel better now.... Well, people are bringing up interesting things... So, we do know that the bigger ic work, but, as banditlex noted- others have said that the GT2 ic only work on extended track use [makes sense as short bursts aren't going to do a lot of heating up] and the big ics aren't going to see an advantange on these same short bursts. I know from a long time with the good ol modded 930s [regardless of how long I have my GT2 I intend to keep my 930 until I either cannot drive it anymore or they pry the keys out of my cold dead hands] the general consensus has always been that really large ics are pretty useless unless you live in the desert or somewhere else you can do extended boost runs. BUT, that doesn't take into account the wonderful computer geek stuff, which is where the genuine improvements in performance have taken place in the last few years. So, perhaps the computers are allowing you to run BIG ic and not suffer? Anyone who can comment about just.. using the cars and if your butt dyno noticed a genuine difference in punch or longer pulls, but after swapping ONLY the ics? [I would wonder if that is the case, if the computer is making up for what would otherwise be lag? Interesting.]

On the 996tt/X50/GT2 trans: If anyone actually wants to know I can pull my Service Info Technik out and quote you but the GT2 trans isn't slightly different than the 996tt, it is significantly different. [There isn't a X50 Svc Info Teck so the info I have seen on these is scattered about, but I would love to know more.] What I have heard is that they added the X50 as the sales of GT2s were so poor they were taking a big financial hit on the development, so they intended to make a good profit on the X50s and sell a bunch of them with relatively small extra expense. They DID use a lot of the GT2 bits on the engines but I understand that the engines are close but not the same spec.
GT2 trans changes include: steel sycros, gear oil spray, oil/water cooler, mechanical limited slip diff, etc.... It's like they really were building it to be a race car. The Info Svk Teck makes many references to using it for competition work and other things, such as fitting the optional racing safety electrical cut out. If you are a gearhead, I cannot recommend the I S T books too highly. For this audiance you should start off with the 996tt and the GT2 books. About $25 ea.
JR

 

Ok, I am somewhat clueless about some of this computer stuff. I tried to upload a copy of the page that shows the "GT2 Charge air intercoolers". No luck.

Here is what it says. [The only image is pretty useless anyway.]
"The charge air temperature of the charge air intercooler increases owing to the higher boost pressure of the 911 GT2. For this reason, charge air intercoolers are used which have a 5% higher cooling capacity than thos used in the 911 Turbo (996).
The following design features make this possible without increasing the size of the intercoolers: *Increased number of fins (between cooling pipes) by reducing gap between fins. *Longer fins which project by approx. 2.5 mm above teh surface of cooling pipes on each side of the intercooler."

Thats it, folks. So, in the practical world, the only difference you would easily notice is that the fins actually stick out beyond the edges of the intercooler body.
Hope that small tidbit helps.
JR

 

Where do we get these "books"? I want one.

We have no proof other than "reinforced trans" in the X50 on the sales brochure. I Imagine for 18K porsche wasn't lying....

Here is the EXACT TEXT:
OPTION X50 Turbo Power Kit 450 HP
Includes modified turbo chargers, intercoolers, electronic control units, and


Some people say it's exactly the same as a TT, others say it's a GT2.

 

I know there is a GT2 book on eBay. SDo a search and you will find it easily. I believe the starting bid is $25. Note you can also still get these via your friendly Porsche dealer. If your parts guys aren't helpful, I have had wonderful help from the guys at Sunset Porsche in Oregon [cost plus 10% as I recall.]

The 911tt book is also quite helpful. Tryng to dig mine up as I believe it is essential if you want to understand more about the GT2. The GT2 volume merely addresses what is different from the 996tt. I have never seen anything good on the X50. I believe it is covered in the TSBs issued later. These two SIT books only cover to the 2002 year. [Now I am trying to find more on the X50 as I am curious also. I KNOW the trans cannot possibly have the same specs as GT2 , if only because it is awd vs rwd.]
JR

 

Thanks John, I just bought it!

Jeff

 

Same exact tranny as the 996 TT's. The only difference is that the GT2 tranny has a cover plate over the front differential output shaft hole...as well as a seperate tranny oil cooler.

I have the OEM Porsche Tech/Service Manuals for both the 996 GT2 and 996 Turbo.

 

Tanks Scott. This point has been established already though, the GT2 has an AWD tranny with no FWD components.

I'm trying desperately to figure out what is "modified" on the X50 tranny.