2WD conversion - Traction issues
#16
08-18-2006, 02:16 AM
Originally Posted by Porscheboy16
Agreed
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.......
This is just a teaser Steve (who rode with me and took an hour and a half worth of video footage) made! http://www.youtube.com/watch?v=-PHsshqPjos&NR
Edit: Here is the minor footage of the twisties, before we really started cranking around the turns at crazy speeds and acceleration coming out of them, damm all of these teaser's are even killing me LOL!!
http://www.youtube.com/watch?v=bDyhtMvHnXo
#17
08-18-2006, 08:37 AM
Originally Posted by iLLM3
Soon fella's very soon! Here was one of us coming out of the twisties onto a main straight, rs4 took off in front of me, then onto me and GT2 and a 140mph run This is just a teaser Steve (who rode with me and took an hour and a half worth of video footage) made!
http://www.youtube.com/watch?v=-PHsshqPjos&NR
Edit: Here is the minor footage of the twisties, before we really started cranking around the turns at crazy speeds and acceleration coming out of them, damm all of these teaser's are even killing me LOL!!
http://www.youtube.com/watch?v=bDyhtMvHnXo
This is just a teaser Steve (who rode with me and took an hour and a half worth of video footage) made! http://www.youtube.com/watch?v=-PHsshqPjos&NR
Edit: Here is the minor footage of the twisties, before we really started cranking around the turns at crazy speeds and acceleration coming out of them, damm all of these teaser's are even killing me LOL!!
http://www.youtube.com/watch?v=bDyhtMvHnXo
#18
08-18-2006, 08:55 AM
Originally Posted by Salespunk
I think he is trying to say that any real sports car has an LSD.
Kiko, get the LSD and you will be amazed at how well your car handles. Without it, you are just spinning the inside rear wheel through turns. The real traction is with the outside wheel and the only way to take advantage of that is an LSD.
Also remember that you are running traction control software that was written in 1998. That is the reason it is so sensitive. Previous TC software would not allow ANY slip angles in the car. With the 997 the software allows up to 15 or 20 degrees of slip angle before intervention. Subsequently you can throw the cars around much more without the TC software slowing down the fun.
Kiko, get the LSD and you will be amazed at how well your car handles. Without it, you are just spinning the inside rear wheel through turns. The real traction is with the outside wheel and the only way to take advantage of that is an LSD.
Also remember that you are running traction control software that was written in 1998. That is the reason it is so sensitive. Previous TC software would not allow ANY slip angles in the car. With the 997 the software allows up to 15 or 20 degrees of slip angle before intervention. Subsequently you can throw the cars around much more without the TC software slowing down the fun.
A 2wd high power car without LSD makes me smile..
#19
08-18-2006, 02:03 PM
Originally Posted by SMR
Exaktly
A 2wd high power car without LSD makes me smile..
A 2wd high power car without LSD makes me smile..
#20
08-18-2006, 02:17 PM
Originally Posted by rwm514
I discused this once with Todd K. and he said that in high HP applications the RWD 996tt actually does better with an open diff than a GT2 LSD because the LSD tends to steer the car in a unpleasant way. Thats just my interpretation of what he said, but I believe him.
#21
08-18-2006, 06:40 PM
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that just baffles me that for a car that is $130k, porsche didn't bother to put in a rear LSD..... i guess they figured no one would be doing RWD conversions
#23
08-19-2006, 05:33 AM
Basic Sponsor
Originally Posted by rwm514
I discused this once with Todd K. and he said that in high HP applications the RWD 996tt actually does better with an open diff than a GT2 LSD because the LSD tends to steer the car in a unpleasant way. Thats just my interpretation of what he said, but I believe him.
we will see.
__________________
2001 996TT 3.6L and stock ECU
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2001 996TT 3.6L and stock ECU
9.66 seconds @ 147.76 mph 1/4 mile click to view
160 mph @ 9.77 seconds in 1/4 mile click to view
50% OFF ON PORSCHE ECU TUNING BLACK FRIDAY SPECIAL
Last edited by markski@markskituning; 08-19-2006 at 05:35 AM.
#24
08-19-2006, 09:08 AM
I personnally don't agree with the LSD making the car difficult to drive. You just need to get a bit used to it and do some changes to your suspension and car settings to keep understeer at bay. Once you have it right and you ge quickly used to it, it is by far faster everywhere, turns and straights. In the wet you need to be a bit more careful when braking. A high torque car in 2WD mode and no LSD is not drivable, unsafe, and a waste of rubber. I used to slide 100 feet coming out of turns on the track with semi race suspension and 315 slicks. I also had 4th gear grip losses at 100mph partly because of this, a stiff rear suspension and brutal boost onset.
#25
08-19-2006, 09:34 AM
Originally Posted by Jean
I personnally don't agree with the LSD making the car difficult to drive. You just need to get a bit used to it and do some changes to your suspension and car settings to keep understeer at bay. Once you have it right and you ge quickly used to it, it is by far faster everywhere, turns and straights. In the wet you need to be a bit more careful when braking. A high torque car in 2WD mode and no LSD is not drivable, unsafe, and a waste of rubber. I used to slide 100 feet coming out of turns on the track with semi race suspension and 315 slicks. I also had 4th gear grip losses at 100mph partly because of this, a stiff rear suspension and brutal boost onset.
#26
08-19-2006, 11:46 AM
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Originally Posted by SMR
Are you yoking..?
Say any highpower Rwd car that not have a LSD, the 996 tt doesn have it becouse it's 4wd
Say any highpower Rwd car that not have a LSD, the 996 tt doesn have it becouse it's 4wd
even if it is 4wd, i would expect porsche to throw an LSD in an expensive car such as the turbo. it even shocks me that AMG didn't throw an LSD into their C32 & E55....
ok, you say b/c its awd it doesn't need LSD. what about the subaru STi & mitsubishi EVO? they have 3 LSD's and manual torque split capability. i think even the 1st & 2nd generation mitsubishi AWD eclipses had rear LSD. i'm fairly certain the nissan skyline has 3 LSD's as well.
open diff sucks coming out of corners, launching, etc... i would definitely slap in an LSD, even if staying 4wd, as the advantages are overwhelming.
Last edited by orijinal_poser; 08-19-2006 at 11:49 AM.
#29
08-19-2006, 09:07 PM
Originally Posted by Jean
I personnally don't agree with the LSD making the car difficult to drive. You just need to get a bit used to it and do some changes to your suspension and car settings to keep understeer at bay. Once you have it right and you ge quickly used to it, it is by far faster everywhere, turns and straights. In the wet you need to be a bit more careful when braking. A high torque car in 2WD mode and no LSD is not drivable, unsafe, and a waste of rubber. I used to slide 100 feet coming out of turns on the track with semi race suspension and 315 slicks. I also had 4th gear grip losses at 100mph partly because of this, a stiff rear suspension and brutal boost onset.
#30
08-19-2006, 09:09 PM
Originally Posted by iLLM3
Weird, i havent had any of those issues at all under hard acceleration and twisty driving, havent done a DE yet though being RWD, iw ill soon though!