Question to all with PI TC
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Joined: Sep 2002
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From: Virginia
Question to all with PI TC
Hello all,
Just last week, I installed PI TC on my GS4 and I guess I expected waaaay too much out of this mod??
Under regular stop and go driving, engine revs high to approx 3K rpm during the take off without much of "pull". Now my car feels like a v 6 engine with a turbo or something like it (no insult intened). Don't get me wrong, I love it when I get a chance to drive agressive with an immediate kick but I don't get to do that too often in Washington DC traffic or on the roads of Fairfax Co. Virginia (very unforgiving, no common sense state).
I was wondering if this is to be expected and I just need time to get used to it or did anyone do this mod and change it back for this reason?
Just last week, I installed PI TC on my GS4 and I guess I expected waaaay too much out of this mod??
Under regular stop and go driving, engine revs high to approx 3K rpm during the take off without much of "pull". Now my car feels like a v 6 engine with a turbo or something like it (no insult intened). Don't get me wrong, I love it when I get a chance to drive agressive with an immediate kick but I don't get to do that too often in Washington DC traffic or on the roads of Fairfax Co. Virginia (very unforgiving, no common sense state).
I was wondering if this is to be expected and I just need time to get used to it or did anyone do this mod and change it back for this reason?
Pole Position
Joined: May 2001
Posts: 2,465
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From: Illinois
You've got it about right.
The TC is allowing your engine to rev up into it's power band more quickly to give you that extra oomph. If you're really moving slow in stop'n'go then you shouldn't really notice too much of a difference and if you're hustling some you shouldn't notice too much of a difference but I can see where if you're constantly in-between you could become very aware of revving up to 3000 RPM and not as much movement as you would expect per db sound generated.
The TC is allowing your engine to rev up into it's power band more quickly to give you that extra oomph. If you're really moving slow in stop'n'go then you shouldn't really notice too much of a difference and if you're hustling some you shouldn't notice too much of a difference but I can see where if you're constantly in-between you could become very aware of revving up to 3000 RPM and not as much movement as you would expect per db sound generated.
Originally posted by Mr Johnson
You've got it about right.
The TC is allowing your engine to rev up into it's power band more quickly to give you that extra oomph. If you're really moving slow in stop'n'go then you shouldn't really notice too much of a difference and if you're hustling some you shouldn't notice too much of a difference but I can see where if you're constantly in-between you could become very aware of revving up to 3000 RPM and not as much movement as you would expect per db sound generated.
You've got it about right.
The TC is allowing your engine to rev up into it's power band more quickly to give you that extra oomph. If you're really moving slow in stop'n'go then you shouldn't really notice too much of a difference and if you're hustling some you shouldn't notice too much of a difference but I can see where if you're constantly in-between you could become very aware of revving up to 3000 RPM and not as much movement as you would expect per db sound generated.
Lexus Test Driver
Joined: Jun 2002
Posts: 869
Likes: 1
From: California
As with many (if not all) performance mods, there is a trade-off. What you have described is pretty much what you should expect with the higher stall speed TC. Just a matter of getting used to it IMO, also the lower gearing of the Torsen LSD (3.76 gears) compliments the TC mod and helps the car to be in the proper rpm range more easily.
EV ftw!!!
Joined: Nov 2002
Posts: 9,007
Likes: 588
From: Lake Ontario
Re: Question to all with PI TC
Originally posted by JCHO
Under regular stop and go driving, engine revs high to approx 3K rpm during the take off without much of "pull". Now my car feels like a v 6 engine with a turbo or something like it (no insult intened).
Under regular stop and go driving, engine revs high to approx 3K rpm during the take off without much of "pull". Now my car feels like a v 6 engine with a turbo or something like it (no insult intened).
I absolutely love the TC (and Supra 3.76 gear lsd rear differential combo)!
It certainly does NOT feel like a V6 by any stretch of the imagination. Not to me anyway.
Lexus Test Driver
Joined: Jun 2002
Posts: 869
Likes: 1
From: California
Agree with Hameed-I should have clarified in my previous post that I also DO NOT think my car feels anything like a V-6 (turbo or not). I was only refering to the fact that the car will rev higher upon accelerating-which is what you are after.
I love the performance of the car with the TC mod (and others).
I love the performance of the car with the TC mod (and others).
Thread Starter
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Joined: Sep 2002
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From: Virginia
Thanks for replies.
Like FutureGS4 said, I accept it is a trade off. I guess I just didn't expect it to be as noticeable with higher stall speed. I must admit I am enjoying and appreciating this mod more each day. Looks like LSD is next on the list.
If somehow we can get rid of stop and go traffic in DC.. (dreaming of course..)
Like FutureGS4 said, I accept it is a trade off. I guess I just didn't expect it to be as noticeable with higher stall speed. I must admit I am enjoying and appreciating this mod more each day. Looks like LSD is next on the list.
If somehow we can get rid of stop and go traffic in DC.. (dreaming of course..)
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Originally posted by JCHO
Thanks for replies.
Like FutureGS4 said, I accept it is a trade off. I guess I just didn't expect it to be as noticeable with higher stall speed. I must admit I am enjoying and appreciating this mod more each day. Looks like LSD is next on the list.
If somehow we can get rid of stop and go traffic in DC.. (dreaming of course..)
Thanks for replies.
Like FutureGS4 said, I accept it is a trade off. I guess I just didn't expect it to be as noticeable with higher stall speed. I must admit I am enjoying and appreciating this mod more each day. Looks like LSD is next on the list.
If somehow we can get rid of stop and go traffic in DC.. (dreaming of course..)
but yeah, i am definitely enjoying it every moment man. it's no fun, coz' now i walk away from 540 easy
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Thread Starter
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Joined: Sep 2002
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From: Virginia
Slowly but surely, I might be getting bit with the mod bug. 
I am fast approaching 60k miles, so TM plugs, SRT intake hopefully soon.
Also can someone tell me how much LSD's (+ general install cost) go for?
I am fast approaching 60k miles, so TM plugs, SRT intake hopefully soon. Also can someone tell me how much LSD's (+ general install cost) go for?
Originally posted by JCHO
Also can someone tell me how much LSD's (+ general install cost) go for?
Also can someone tell me how much LSD's (+ general install cost) go for?
TRD LSD = ~$800 + $500 install (expensive install due to TRD unit being only the insides of the pumpkin.
Supra LSD = ~$1500 new or $500-$1000 used + $300 install
The Supra LSD comes with higher ring gear for lower overall gearing and the TRD one uses the stock gears. Translation, the Supra LSD *really* make the car LAUNCH and accelerate harder in all situations, but at the expense of top speed (probably lowered from 150 to 140, just a ballpark again).
FYI, I have PI TC and Supra LSD as do a few others on here, and trust me, if you like the PI TC you'll LOVE the combo of it and the Supra LSD. The biggest difference for me besides the increased performance is that VSC kicks in SO RARELY now. I was really getting sick and tired of the VSC spoiling the fun so much. Sure you can turn it off, but I'm not comfortable leaving it off because it DOES serve a valuable safety purpose.
Anyway, hopefully this helps.
I concur!
Originally posted by bitkahuna
Just ballparks:
TRD LSD = ~$800 + $500 install (expensive install due to TRD unit being only the insides of the pumpkin.
Supra LSD = ~$1500 new or $500-$1000 used + $300 install
The Supra LSD comes with higher ring gear for lower overall gearing and the TRD one uses the stock gears. Translation, the Supra LSD *really* make the car LAUNCH and accelerate harder in all situations, but at the expense of top speed (probably lowered from 150 to 140, just a ballpark again).
FYI, I have PI TC and Supra LSD as do a few others on here, and trust me, if you like the PI TC you'll LOVE the combo of it and the Supra LSD. The biggest difference for me besides the increased performance is that VSC kicks in SO RARELY now. I was really getting sick and tired of the VSC spoiling the fun so much. Sure you can turn it off, but I'm not comfortable leaving it off because it DOES serve a valuable safety purpose.
Anyway, hopefully this helps.
Just ballparks:
TRD LSD = ~$800 + $500 install (expensive install due to TRD unit being only the insides of the pumpkin.
Supra LSD = ~$1500 new or $500-$1000 used + $300 install
The Supra LSD comes with higher ring gear for lower overall gearing and the TRD one uses the stock gears. Translation, the Supra LSD *really* make the car LAUNCH and accelerate harder in all situations, but at the expense of top speed (probably lowered from 150 to 140, just a ballpark again).
FYI, I have PI TC and Supra LSD as do a few others on here, and trust me, if you like the PI TC you'll LOVE the combo of it and the Supra LSD. The biggest difference for me besides the increased performance is that VSC kicks in SO RARELY now. I was really getting sick and tired of the VSC spoiling the fun so much. Sure you can turn it off, but I'm not comfortable leaving it off because it DOES serve a valuable safety purpose.
Anyway, hopefully this helps.
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Joined: Sep 2002
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From: Virginia
Thanks for the info. I will probably look into getting this done hopefully in January (after X-Mas).
Meanwhile, wish me luck today guys! I have a friend who has been trash talking to me about how badly his 02' E55 will kick my GS's butt
so we reserved an hour of track time for today 11 AM - 12 Noon EST to find out. Three other friends of mine will be joining us. They also have 01' S500, 02' E55 and 04' E55 (slight mod to engine with RENNTECH). We will see how things will turn out.
Meanwhile, wish me luck today guys! I have a friend who has been trash talking to me about how badly his 02' E55 will kick my GS's butt
so we reserved an hour of track time for today 11 AM - 12 Noon EST to find out. Three other friends of mine will be joining us. They also have 01' S500, 02' E55 and 04' E55 (slight mod to engine with RENNTECH). We will see how things will turn out.
Thread Starter
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From: Virginia
Yup, I figured that but what the heck. Just like my golf game, I will try and try again. 
I just found out due to liablity issue, we can't drag side by side. Single car time trap. My goal today is to stay close as much as possible.
I just found out due to liablity issue, we can't drag side by side. Single car time trap.
My goal today is to stay close as much as possible.