All,

I have thought about removing the front dif/drive shafts and would like some input. A friend who is extremely knowledgeable advised me to do it as it completely transforms the dynamics of the car, saves 70ish pounds of weight, and only takes a couple hours to do.

I haven't seen much about it outside of extreme applications where the dif can't withstand the HP, which is not me. I have a tune/exhaust and will do modified K16's from 911 tuning.

I also had an inspection for a local DE and they informed me that my front boots were torn so it seemed like as good of a time as any.

Lastly, I have a set of wheels left over from my 997 that I would like to run but currently cannot with the front dif in place.

A few things pushing me that direction but any advice is always appreciated!

 

use the forum search function, there are a few big threads covering every aspect of it

 

Plan for a LSD as part of your conversion especially with your billet K16's. Seems like anyone who did it initially and left the rear an open diff ended up doing an LSD to really get the car to the point they were happy with it.

 

yeah, it's a wheelspinning waste of time to try it running open diff. utterly useless, and worse even than lugging that front diff around connected.

with lsd ( or a wavetrac tbd ) it's an entirely different car. dramatically so.

 

If you are doing 1/4 mile stuff then yes you will need an LSD. If you are doing roll racing, a good sticky tire will be fine.

 

I run RWD with an open diff

just to **** off the LSD guys

 

the only time i think it'd be possible for what you're saying to be "true" would be if all four wheels always had the same degree of contact with the ground. because otherwise, anytime you encounter anything even close to an open diff lift, that least weighted wheel is gonna spin you car slowly around and that spinning costs time and power down. i'm rarely "flat" so it didn't work open diff rwd for me, and took me all of a cpl days to figure that out! a 1/4 strip might be another thing or result altogether. i dunno.

 

its cool. when it works. it works. it doesnt work up and down and off camber all day long is my point. ANY situation in which one or more wheels is less "weighted" it will show its shortcoming s quickly running open diff. it can't help but show em lol. the 996t it isn't made to run that way and suspension and rear drivetrain changes all the only real workarounds for a tt. that's why folks do it, to make it less the genteel car it was compromised as, and more gt2/3 like. thats ( presumably ) why "we" go rwd. we mess with what we've got lol

 

actually you run 1wd with an open diff

 

hah! true

 

If you are road racing you will need a LSD. Actually, if you are doing anything other than grannying around except for the occasional burst of acceleration to amaze your friends you will be much happier with a LSD.

 

Lol. It's called roll racing, maybe you should look up before you make a condescending comment.

I know plenty of high horsepower cars that ran and open diff for a while with zero issues. I never once mentioned road course racing either.


I love how you guys know it all and have pretty much bolt on cars and then tell me what and why lol.

 

You don't need to have a lot of power to understand why an LSD is important, speaking of condescending.

 

Thinking about going RWD. I'm a pretty aggressive and experienced driver although I consider myself very courteous and safe. I like to hit the canyon twisties and push quite hard when safe to do so. I've never tracked my car and don't intend to do so, but I have a decade and hundreds of races under my belt roadracing GSXR's.

1)Would going RWD without a LS be a mistake?

2)What could I expect?

My previous '99 C2 had a factory LSD and it worked well and was fun at the limit.

3) What diff does the GT2 use stock? LS or open?

 

To answer the OP...I used to own a modified '78 930. Of course it was RWD. It was also known as the "Widow maker" for obvious reasons if you've ever had the pleasure of driving one. Granted it used one K27 turbo and the lag was shocking, but when the power hit it was both exhilarating and scary. Not really what you want for twisties. I got rid of it for my AWD turbo...and couldn't be happier. IMHO, you want RWD, get a GT2 which was designed for RWD. And removing 70lbs from the front where the turbo is already light...not sure I get this strategy for weight loss. Flame on.