Finally got my PI TC installed. WOW!
Very happy with the results and awesome video btw - it's a classic. I am going to make a crazy one soon myself for our fellow CL members! Just need to get someone to video me while I drive. lol
Driver
Joined: May 2004
Posts: 162
Likes: 0
From: Kentucky
Dude...I MUST say that your video single handily swayed my decision on the PI TC about 2 years ago. I remember I even asked you a bunch of questions via PM. Thanks for that input! Very happy with the results and awesome video btw - it's a classic. I am going to make a crazy one soon myself for our fellow CL members! Just need to get someone to video me while I drive. lol
Very happy with the results and awesome video btw - it's a classic. I am going to make a crazy one soon myself for our fellow CL members! Just need to get someone to video me while I drive. lol
Looking at the condition I am in what are the chances me against a G35 couple on 19" wheels. They have a lip on it and seem to be decent in weight. I have a PI TQ and a srt intake. I also have Vossen 20" rims that are heavy and a two 12s in the trunk. What are the chances i can take him off the line. Any shifting suggestions...should i use tiptronic (even though i never use it or know how to) what are possible suggestions. Seems to me like off the line it screeches so much that the guy might have me. How much torque does it add to the stock by the PI TC?
thanks....BTW my friend doesn't know I have installed the TC and SRT INTAKE in my car...
I hope I can take him.
thanks....BTW my friend doesn't know I have installed the TC and SRT INTAKE in my car...
I hope I can take him.
Lexus Champion
Joined: Feb 2001
Posts: 3,124
Likes: 32
From: Texas
Here's a vid I took a couple of years ago when I had my 2800 stall PI installed. No LSD, just stock open diff.
http://www.fototime.com/DA3A4E2B82AA48C/orig.wmv
http://www.fototime.com/DA3A4E2B82AA48C/orig.wmv
How many miles were on your car at the time of the video?
I have seen this happen on older SC and LS models. The reason (my theory) if you understand how an LSD works and look at the design of the factory open differential. It must be that as the units wear they increase in friction in the spider gear to housing surfaces. With this friction the stock open diff starts acting as a LSD. On an open differential there is equal torque to both tires as long as each tire has full traction. It does not take that much friction to achieve LSD action. In fact that is exactly what a clutch style LSD does. It creates enough friction to continue to torque both tires even if one looses traction and yet still slip enough to be a differential when the vehicle is turning an each rear tire must rotate at a different RPM.
Driver
Joined: May 2004
Posts: 162
Likes: 0
From: Kentucky
This is the first evidence I have seen on a GS4xx of the Lexus/Toyota open differential acting like a limited slip.
How many miles were on your car at the time of the video?
I have seen this happen on older SC and LS models. The reason (my theory) if you understand how an LSD works and look at the design of the factory open differential. It must be that as the units wear they increase in friction in the spider gear to housing surfaces. With this friction the stock open diff starts acting as a LSD. On an open differential there is equal torque to both tires as long as each tire has full traction. It does not take that much friction to achieve LSD action. In fact that is exactly what a clutch style LSD does. It creates enough friction to continue to torque both tires even if one looses traction and yet still slip enough to be a differential when the vehicle is turning an each rear tire must rotate at a different RPM.
How many miles were on your car at the time of the video?
I have seen this happen on older SC and LS models. The reason (my theory) if you understand how an LSD works and look at the design of the factory open differential. It must be that as the units wear they increase in friction in the spider gear to housing surfaces. With this friction the stock open diff starts acting as a LSD. On an open differential there is equal torque to both tires as long as each tire has full traction. It does not take that much friction to achieve LSD action. In fact that is exactly what a clutch style LSD does. It creates enough friction to continue to torque both tires even if one looses traction and yet still slip enough to be a differential when the vehicle is turning an each rear tire must rotate at a different RPM.
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The GS430 TC is the same as on the SC430. and I've been told that it is the same as the GS400 98-00. This is the route I was planning, I bought a used TC awhile ago to use.
here is Pearlpower's post
https://www.clublexus.com/forums/sho...39#post3605939
here is Pearlpower's post
https://www.clublexus.com/forums/sho...39#post3605939
Last edited by GILLEXUS; Jun 15, 2008 at 02:26 PM. Reason: TC instead or tanny
hmm u think the 430 tranny is the same as the 400.. even tho the 430 have a lil more power? i kno i its not much but i feel theyd change sumthing.. like in the TC especially if anything at all... p.s. thanks for that link