996 Turbo / GT2 Turbo discussion on previous model 2000-2005 Porsche 911 Twin Turbo and 911 GT2.

RWD conversion question

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Old Apr 30, 2012 | 06:20 AM
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RWD conversion question

I have read the threads that are a few years old about doing this and am wondering how they feel about the conversion after extended time with the conversion?

I have some noise coming from my front diff from day 1 and am told it is not unusual but I don't like it,. My question is on a modded car if I go this route and remove the front diff will the car become unmanageable, I have around 600 WHP and some have said the car will become totally uncontrollable and a disaster, can anyone chime in that has experience with this . I don't plan on adding an LSD if I did this. Should I be worried or just go ahead and do it?

I had a 964 turbo with 450 WHP and drove it with out issue ( I really enjoyed it) for several years , I would think the drama would not be any worse than that car.
 

Last edited by jonty; Apr 30, 2012 at 06:27 AM.
Old Apr 30, 2012 | 07:17 AM
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Well, you probably answered your own question relative to your 964 Turbo experience, and there are a lot of 800+ hp GT2 owners around here too. I would think that 600 whp will still be quite manageable due to the way that 911s put down their power, not to mention a reasonably broad powerband. Good luck!
 
Old Apr 30, 2012 | 07:37 AM
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It really depends what you like to do, i've had all 3, 4wd turbo,2wd conv,and gt2. I will say that for canyon carving the 4wd is the choice, I can drive it faster and not worry bout gravel,water,ice ect as much. The gt2 is in many ways more "fun" and better on track.
I will say that if you do the conversion do 2 things for sure 1)posi of some type 2) correct gt2 uprights in front.

Tons of threads on this with pros and cons either way IMHO
 
Old Apr 30, 2012 | 08:37 AM
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I do not want to do an LSD and lose PSM and also I will not be doing gt2 uprights
 
Old Apr 30, 2012 | 08:51 AM
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IMHO...600 hp,no limited slip and keep psm? Leave it 4wd.
 
Old Apr 30, 2012 | 09:12 AM
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Originally Posted by jonty
I do not want to do an LSD and lose PSM and also I will not be doing gt2 uprights
A few thoughts here. I have only heard of PSM issues with LSDs on AWD cars. None with the RWD conversions.

That aside, I have been RWD for maybe 8 months and it just feels right. I will add that an LSD is in my future though. I am flashed k16 right now, not as much power as you. One thing to note with the 964 turbo verses the 996tt and gt2. The 964 turbo and gt2 both come with LSDs factory, so take that into consideration. With RWD, good tires are a must. The Pirelli pzeros will not cut it. I spun through my pirellis so quick it wasn't even funny. I am now running bfg GeForce KDWs and the grip is great.
 

Last edited by VAGscum; May 1, 2012 at 04:05 AM.
Old Apr 30, 2012 | 09:12 AM
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Exactly what Derboost says. I have been preaching this over and over.
In the real world (non racetrack) the awd is faster. For street "challenges"
awd is the way to go. Heck I have seen Subaru's beat much more powerful and expensive cars for one reason ... Traction
 
Old Apr 30, 2012 | 01:18 PM
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I guess I will look at a new front diff then as mine is just to noisy for me. Speaking of Suby's I had fun the other night.
I was at the shop where I keep my drag car and they just had a 9012 Subaru STI come off there dynojet dyno after making 526 WHP he was leaving with the tuner to do a street test drive and I followed them out. I was shocked how I was able to leave him in the dust I truly thought he had missed a gear LOL. The tuner and I had a chuckle afterwards as the new Subaru owner was disappointed to say the least.
 
Old Apr 30, 2012 | 04:14 PM
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Originally Posted by jonty
I have read the threads that are a few years old about doing this and am wondering how they feel about the conversion after extended time with the conversion?

I have some noise coming from my front diff from day 1 and am told it is not unusual but I don't like it,. My question is on a modded car if I go this route and remove the front diff will the car become unmanageable, I have around 600 WHP and some have said the car will become totally uncontrollable and a disaster, can anyone chime in that has experience with this . I don't plan on adding an LSD if I did this. Should I be worried or just go ahead and do it?

I had a 964 turbo with 450 WHP and drove it with out issue ( I really enjoyed it) for several years , I would think the drama would not be any worse than that car.
If you go RWD with out an LSD you will seriously detract from the performance of the car due to traction issues especially on twisty track as a result of the open diff. It's no big secret, the search button is your friend. If you do an LSD, you must do transmission cooling to extract the extra head added by the LSD. You may get away without added tranny cooling on the street but not if you track the car of drive it hard for extended periods of time. There is a reason that all GT2 and GT3s have LSDs and gearbox cooling. Either do it right or don't do it all is my $.02.
 

Last edited by pwdrhound; Apr 30, 2012 at 11:12 PM.
Old Apr 30, 2012 | 04:22 PM
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Originally Posted by pwdrhound
If you go RWD with out an LSD you will seriously detract from the performance of the car due to traction issues especially on twisty track as a result of the open diff. It's no big secret, the search button is your friend. If you do an LSD, you must do transmission cooling to extract the extra head added by the LSD. You may get away without added tranny cooling on the street but not if you track the car of drive it hard for extended periods of time. There is a reason that all GT2 and GT3s have LSDs and gearbox cooling. Either so it right or don't do it all is my $.02.
yep, I see your and others points, the car will never be tracked its just my weekend fun car and that said I would rather spend the money on other fun things for the car than an LSD setup. Looks like I am staying AWD just need to find a quite front diff.
 
Old Apr 30, 2012 | 08:01 PM
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I've driven the car minus the front drive-shaft on and off and eventually went back to AWD. The only place where you will notice any real difference is hard starts, coming out of slow corners, etc...

The 996T is basically RWD except when the rear tires slip quite a bit. Even then, the AWD is more of a small "tug" that what you see in say a Subaru with symmetrical AWD.
 
Old Apr 30, 2012 | 08:09 PM
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Originally Posted by pwdrhound
If you go RWD with out an LSD you will seriously detract from the performance of the car due to traction issues especially on twisty track as a result of the open diff. Either so it right or don't do it all is my $.02.
x2
 
Old May 1, 2012 | 12:40 AM
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Originally Posted by jonty
I guess I will look at a new front diff then as mine is just to noisy for me. Speaking of Suby's I had fun the other night.
I was at the shop where I keep my drag car and they just had a 9012 Subaru STI come off there dynojet dyno after making 526 WHP he was leaving with the tuner to do a street test drive and I followed them out. I was shocked how I was able to leave him in the dust I truly thought he had missed a gear LOL. The tuner and I had a chuckle afterwards as the new Subaru owner was disappointed to say the least.
My front diff is for sale, it's got 30000km on it. Give me an offer and I'll check on the shipping cost..
 
Old May 1, 2012 | 01:52 AM
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As stated above there is alot more to a GT2 than just the deletion of AWD. To make it work correctly on a 996TT would be very expensive (basically all the special GT2 parts front to back and the list parts list is quite long). It you want a GT2 sell what you have and buy one. In the long run it will be cheaper and the car will retain a greater portion of the premium you paid for it, than a 996TT that has been converted to AWD.
 

Last edited by Duane996tt; May 1, 2012 at 07:17 PM.
Old May 1, 2012 | 06:04 AM
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Originally Posted by Speedfreak
My front diff is for sale, it's got 30000km on it. Give me an offer and I'll check on the shipping cost..
Mine only has 40k on it and it is noisy, you did a RWD I assume?
 


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