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

Should I put the front driveshaft back?

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  #16  
Old 08-04-2014 | 06:37 AM
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it doesn't effect the handling so much as it does the delivery of power ( obviously ) and not in a favorable way. i have to disagree that it won't be felt on the street. i would say that it is felt in any condition in which an "open" differentials shortcomings are noticed. e.g. wheel spin when you want it least, when power should be to both wheels not one. e.g. cornering.

the lsd or wavertrac will eliminate that. then the rwd conversion makes all the sense in the world. but i agree it is less noticeable in straight-line accel. but thats not for the most part, what i do, or how i'm driving. for hill climbing this has been the best possible mod i could've done. just sorry i waited so long to do it. having said all that, i knew something wasn't quite right with simply the front shaft removed. ya gotta get the rear wheels to lock and work in synch. then it'll all make sense,
 
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Old 08-04-2014 | 06:53 AM
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Put it back on
 
  #18  
Old 08-04-2014 | 07:38 AM
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whereitsat drives his car like a madman. It's a true example of how tough Porsche's are built.
 
  #19  
Old 08-04-2014 | 08:36 AM
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Originally Posted by Whereitsat
I haven't driven it on a road course in 2WD, so I can't say how the lack of an LSD will effect the handling. However, on the road and very spirited driving (e.g. high boost in both straight and turns - I flog my car and often), no ill characteristics. If it's primarily a street car not having an LSD will go unnoticed. If dig or road racing, I could see how having an open diff would be bad. I was skeptical and delayed going to 2WD until I could install an LSD. Being not sure what my next step is with the car, I succumbed to peer pressure and converted. Glad I did.

Totally agree with this. Also a lot of other people have ran 2wd without an LSD for a while. One is Todd and the other Eddie bello, both prime examples of super high horsepower cars. If u have good sticky tires I don't see u having any issues.
 
  #20  
Old 08-04-2014 | 10:05 AM
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what's the main benefit of converting to RWD?
 
  #21  
Old 08-04-2014 | 10:38 AM
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Benefits: lighter steering, better steering feel, quicker revving engine, less weight (73 LBS)


Cons: Time to remove components (I paid), car initially stalled when quickly depressing clutch and allowing rpms to drop below idle speed - no longer does this), no longer have front pulled through corners


I run Toyo R888's and have no issue. And Paulie is right.


To those that are commenting that haven't driven a 2 WD 996T, go drive one first then report back. The GT2 has a weak LSD and I bet there are many out there that are essentially open diffs. They don't seem to be crashing on every corner.
 
  #22  
Old 08-04-2014 | 11:41 AM
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I finally did this mod last month by removing the diff and front axles as well. The only time I notice less traction is when making a sharp right or left turn while accelerating. The unweighted rear wheel seems to break traction more quickly.
Everything else is positive. Straight line acceleration feels faster and steering feels much better. The AWD was pretty horrible and when it would break traction before I never felt like the AWD was "saving" me I just felt PSM killing the fun. That has not changed.
Driving aggressively on the street is a better experience than it was with AWD but I have yet to take it back to the track since removing it. I imagine that I will want a LSD after going back to the track though
If I were the OP I would finish the job and remove the axles/diff. The front diff may actually be providing some resistance and negatively impacting your driving experience.
 
  #23  
Old 08-04-2014 | 12:17 PM
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I'm starting this mod...THIS WEEK!
 
  #24  
Old 08-04-2014 | 12:26 PM
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my advice if you're beginning the mod is to remove the cardan first. drive for awhile under a variety of conditions to get a sense of what kind of rwhp difference it'll make. then consider the lsd or rear tbd to maximize all the newly directed power.

as mrmass has stated, it is primarily when accelerating in/out of apexes that the LACK of the lsd wil be felt resulting in excessive wheel spin to the wheel with the least weight. again, you're open diff at that point. straightaways it is extrememly difficult to *feel* any change. at least i couldn't.
 
  #25  
Old 08-04-2014 | 11:05 PM
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Originally Posted by Wealth Manager
Totally agree with this. Also a lot of other people have ran 2wd without an LSD for a while. One is Todd and the other Eddie bello, both prime examples of super high horsepower cars. If u have good sticky tires I don't see u having any issues.
No disrespect to eddie but last I heard bello crashed.... Any real drag car always has posi
My mom's old ford LTD also didnt have LSD, and she didnt complain, but when I took it out I was always spinning the inner tire.
Sure you can drive around leisurely without LSD but when u need to put the power down on a high horsepower car not having it can only be a negative.
 
  #26  
Old 08-05-2014 | 11:19 AM
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I cannot see where the LSD wouldn't be an important need when going rwd, especially considering some of the hp you guys are pushing.
 
  #27  
Old 08-05-2014 | 11:25 AM
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Originally Posted by YJosephTT
No disrespect to eddie but last I heard bello crashed.... Any real drag car always has posi
My mom's old ford LTD also didnt have LSD, and she didnt complain, but when I took it out I was always spinning the inner tire.
Sure you can drive around leisurely without LSD but when u need to put the power down on a high horsepower car not having it can only be a negative.


The car crashed with an LSD in it fyi.




There are lots of people on here who have had rwd with no lsd at some point and time and high HP. 1/4 mile stuff yes u really need it, roll racing from high speeds, not so much.


Also, the rear engine puts more weight over the the drive wheels, which also lessens the need for LSD. This isn't a Ford.
 

Last edited by Wealth Manager; 08-05-2014 at 11:31 AM.
  #28  
Old 08-05-2014 | 01:21 PM
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Originally Posted by YJosephTT
I wouldn't feel comfortable driving rwd with this kind of power without LSD, how are you guys doing it or are u not driving it aggressive without the DS?

lol my 1200hp 996 didnt have an LSD... worked just fine
 
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  #29  
Old 08-05-2014 | 02:46 PM
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Originally Posted by YJosephTT
I wouldn't feel comfortable driving rwd with this kind of power without LSD, how are you guys doing it or are u not driving it aggressive without the DS?
90% of guys here are straight line stoplight / drag guys. Jump on Rennlist which is more of a racing forum, ask the same question, and you'll get a different answer. The shortcomings of an open diff combined with RWD won't be very apparent until you get the car on a road course and drive it beyond 7/10s or so. On a road course, especially a twisty one, a proper LSD will drop your lap times much more than any extra 200 hp would. Most guys are infatuated with hp numbers, but an LSD is one of the best (but most overlooked) performance mods, RWD or AWD, that you can add to these cars.. People generally only see an LSD as an aid in getting power to the ground, but an equally important byproduct of a proper LSD is the locking factor under braking which really settles the car down under hard braking and allows you to brake later, harder and deeper into a corner, all without the car getting twitchy and unsettled. All this will result in shedding time off your lap and making the car just a bit quicker... Why do you thing Porsche puts an LSD (albeit a weak one) into every GT2/3 that roll of the factory? Because it's one key ingredient in making the cars fast. Cups get the good stuff of course.
 

Last edited by pwdrhound; 08-05-2014 at 03:31 PM.
  #30  
Old 08-05-2014 | 03:02 PM
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You hard core guys would know better than I and I'm sure the rear weight bias is the big plus. I'm with pwdrhound but hey I'm arm chair racing lol.
 


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