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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Old Aug 5, 2014 | 04:26 PM
  #31  
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+1
did not see any difference in straight line acceleration with my wavetrac at 700hp level!and have notice that open diff is more friendly for street use with good sticky tires and will forgive more in cornering (one wheel spinning will less prone to tailfish you)
i would buy an lsd or wavetrac for track use only imo


Originally Posted by pwdrhound
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.
 
Old Aug 5, 2014 | 04:27 PM
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Originally Posted by pwdrhound
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...
x'lnt points. trail braking is also improved dramatically with an "improper" lsd such i have installed. at least from what i experience with my unscientific testing and results. there is no more twitching/tailsnap that was always evident for the brief period i ran rwd without the wavetrac torque biasing diff. the wavetrac also will help to eliminate the open diff condition that causes the tailsnap in/out of corners. i only mention this option as it has improved the car so dramatically. i have no direct experience with the plate type lsd ( proper ) only how well the tbd works on the car.

also +1 to the notion of this all happening in the 7/10 range lol
 
Old Aug 5, 2014 | 07:51 PM
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after having just returned from my daily 30 mile set of twists in my backyard, i think the best way to describe the difference between a properly setup rwd car vs the awd setup is..

you can throttle steer with rwd w lsd, whereas the car will "lumber" around corners with the awd setup. which admittedly is perfect for snow or driving rain, but i can't see what all else.
 
Old Aug 5, 2014 | 07:53 PM
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I guess my thing is that I'm not doing an LSD. No my two options are awd or open rwd.
 
Old Aug 5, 2014 | 07:57 PM
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i would then make my decision based and depending upon what kind of roads or courses i had to play with. if it's just a fast street car with no chance to get on the backroads, i'd leave it "salable" lol
i wish you could try it rwd w lsd. it's positively world's different
 

Last edited by '02996ttx50; Aug 5, 2014 at 08:02 PM.
Old Aug 6, 2014 | 09:49 AM
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Originally Posted by Wealth Manager
The car crashed with an LSD in it
Thanks for the FYI, I was responding to the statement where you first said he did not have.


I'm sure a lot of guys do it and think they're fine but there are also a lot of guys go around having lots of sex without condoms too.... I'm just saying I wouldn't take that chance..

If I'm gonna spend tons of money getting a gazillions hp, why wouldn't you do it right to make use of it.
 
Old Aug 6, 2014 | 09:57 AM
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Originally Posted by pwdrhound
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.
Thanks, I guess I should be seeing what the rennlist forum is upto more often.
 
Old Aug 7, 2014 | 08:21 PM
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RWD >>>> AWD especially for power delivery.

The difference is huge
 
Old Aug 7, 2014 | 08:26 PM
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BTW I have RWD (GT2 align) with open diff, when I track it I will go to a proper LSD but the str8 line times I am doing now are much quicker as measured by the VBOX thing than before when I was AWD.

0.8 secs quicker 60-130.
5secs quicker 100-300 kmh.

BTW I read powderhound at rennlist, he is the dogs bollocks when it comes to tracking our cars.
 
Old Aug 7, 2014 | 09:37 PM
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Originally Posted by wolfhedge
BTW I have RWD (GT2 align) with open diff, when I track it I will go to a proper LSD

dogs bollocks
welcome to the madness. hows your car setup now?
 
Old Aug 9, 2014 | 10:35 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.
Eddie Bello has dragged how many hundreds or 1000s of times without mishap. His crash hardly had to do with having or not having an LSD, especially as the drag race is in a straight line..

But congrats on picking up the one time he went in really hard

I have RWD without LSD and unless I track it regularly I won't be adding LSD. I also drive without PSM but each to their own. I like finding areas with zero people and doing some nice windy road thrashing. It is fun with the open diff and drifting etc in a safe measured way, but would be a good 2-3s sower on a 90 second track from my experiences.
 

Last edited by wolfhedge; Aug 9, 2014 at 10:39 AM.
Old Aug 9, 2014 | 10:44 AM
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Originally Posted by '02996ttx50
welcome to the madness. hows your car setup now?
Gt2 alignment, around 3335 lbs with my *** in it and a full tank gas as I always run very close to full.

RWHP = 540-580 depending on gas, it is FBO but with stock ICs, WGs, plenum and DVs, full coilovers on mid track settings (hard), some LW carbon pieces, RWD, larger injectors, running some E85 and 93 octane.

With my granny shifts am doing around 7.5 secs 60-130 (0.7 degrees downhill) and 7.72 on a flat course in 92F temps with IATS near 118F, that is with my 57 lb dog and myself in it, PSM off. 60-100 in 3.2s best in 3rd gear, 30-70 mph in 2nd gear = 2.7s.

I need ICs




 

Last edited by wolfhedge; Aug 9, 2014 at 10:48 AM.
Old Aug 9, 2014 | 11:21 AM
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Originally Posted by wolfhedge

Gt2 alignment, around 3335 lbs with my *** in it and a full tank gas as I always run very close to full.

RWHP = 540-580 depending on gas, it is FBO but with stock ICs, WGs, plenum and DVs, full coilovers on mid track settings (hard), some LW carbon pieces, RWD, larger injectors, running some E85 and 93 octane.

With my granny shifts am doing around 7.5 secs 60-130 (0.7 degrees downhill) and 7.72 on a flat course in 92F temps with IATS near 118F, that is with my 57 lb dog and myself in it, PSM off. 60-100 in 3.2s best in 3rd gear, 30-70 mph in 2nd gear = 2.7s.

I need ICs
running tuned k16's or..? those are good rwhp numbers if so.. and yes to ic's. that heatsoak'll kill ya.

well again, welcome aboard.. and yes.. psm off. but taking the dog on your runs,..truly is the dogs bullocks. cheers.
 
Old Aug 9, 2014 | 11:36 AM
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K24s (X50 car)
 
Old Aug 9, 2014 | 11:51 AM
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cool, then at least you've got the gt2 ic's. everyone raves about the gt2rs ic's and i'm sure theyre vastly improved? but i'm never at sustained speeds per se, so my old cheese graters seem to work just fine.
 


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