TC in GS430, will it set a check engine light?
02-05-05, 06:47 AM
#16
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Originally Posted by Lextreme
I am not sure about "Check Engine" light, but i have a customer with my TC and LSD at the same time. He stated the steering feels "Loose" Due to different LSD gear ratio. The engine will pick up higher than normal rpm signal and letting the car think its going faster than it actually is.
02-05-05, 06:48 AM
#17
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Originally Posted by Vette Boy
My 96 Impala SS. Before you start talking about the difference in moters, My Impala makes 300HP/380ft*lbs and redlines at 6100 rpm (not exactly stock). I've run a 14.18 @ 96mph and cut a 5.68 sec 0-60 (car weighs 4400lbs). I was surprised to find the 4.30l Lexus V-8 has such a low redline.
02-05-05, 07:55 AM
#18
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Originally Posted by Vette Boy
My 96 Impala SS. Before you start talking about the difference in moters, My Impala makes 300HP/380ft*lbs and redlines at 6100 rpm (not exactly stock). I've run a 14.18 @ 96mph and cut a 5.68 sec 0-60 (car weighs 4400lbs). I was surprised to find the 4.30l Lexus V-8 has such a low redline.
02-05-05, 08:00 AM
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Originally Posted by bitkahuna
...I'm just not sure you can compare whether TC stall speeds are appropriate for your Lexus based on your...experience.
02-05-05, 08:04 AM
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Originally Posted by rheiy
What kind of redline were you expecting to hit on the gs v8?
02-05-05, 08:07 AM
#21
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Originally Posted by Vette Boy
Great point! If I read between the lines, you seem to be an advocate for the PI2800/3.76LSD mod, what experience do you base this on?
TC install 2002
https://www.clublexus.com/forums/performance/68795-dude-you-re-gettin-a-tc.html
3.76 LSD install 2003
https://www.clublexus.com/forums/sho...d.php?t=100341
Vetteboy - suggest you try to track down some local folks to meet with who might have these mods to test them out firsthand
Last edited by DaveGS4; 02-05-05 at 08:11 AM.
02-05-05, 08:11 AM
#22
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Originally Posted by Vette Boy
I expected a 4.3L quad cam motor to have a redline that exceeds a 5.7L overhead valve SBC, instead it's the same (if you're looking for a number, I expected ~6800, ~600rpm more than an LT1). That's why I'm looking for a stall speed similar to what I like on the Impala, funny thing is, PI recommends a 2800 stall speed for the LT1 too
02-05-05, 08:16 AM
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Originally Posted by DaveGS4
He has them both in his GS. And loves it.
Does anyone have some time slips to show the performance improvement?
What about other cars?
02-05-05, 08:22 AM
#24
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Originally Posted by Vette Boy
Does anyone here have experience runing anything else besides a 3.76?
Does anyone have some time slips to show the performance improvement?
Does anyone have some time slips to show the performance improvement?
I haven't seen any other combinations other than GS300s with their 3.9x gears.
You aren't going to get too many before / after quarter mile runs. Probably only .05 % ever take their Lexus to the track. My one time with the 2800 stall TC and the open differential yielded my smoking one tire halfway down the track and high 14's... that's what made me get the LSD intially.
Comparative data.... a GS with a similar load and exactly the same mods as mine (Borla, SRT Intake) except no TC. We were a dead heat on the highway, but at a stoplight I'd very quickly put two carlengths on him. The 2800 stall PI TC makes a substantial difference at launch.
02-05-05, 08:28 AM
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Originally Posted by DaveGS4
...We were a dead heat on the highway, but at a stoplight I'd very quickly put two carlengths on him. The 2800 stall PI TC makes a substantial difference at launch.
02-05-05, 08:40 AM
#26
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Originally Posted by Vette Boy
And my question is, how much does one give up by going with a 2400 vs a 2800? In the Impala and Vette world, it's about a tenth of a second in the quarter and the 0-60 (most of the improvement is in the launch). BTW, I'm not looking to improve my 0-60, I am looking to loosen up the drivetrain so the trans downshifts faster and engine spools up smoother. Based on my experience, it takes an extra 500~600 stall speed to get that.
If you want the 2400, have at it and I hope you're happy with it!
We love having new guinea pigs that like to try new things I can only impress upon you my personal experience of what you will be missing not having that extra stall. I will recommend one thing... get the PI 2800 stall and then if you don't like it, get it adjusted for free during the two years.
Stall Adjustment: Prececion Industries offers one free stall adjustment as part of the features and benefits of the 9 1/2 inch converter series. The stall adjustment option must be made within the standard warranty period of two years from date of purchase. The customer must return the converter with an RA# and a copy of the orginal invoice to preceision Industries. Upon receipt of the converter the technical department will contact the customer to make the appropriate alterations.
<note this group buy is CLOSED >
I've confirmed this policy in the past, but you might want to make 100% sure it still works that way.
http://www.converter.com/index.htm
Last edited by DaveGS4; 02-05-05 at 08:43 AM.
02-05-05, 09:21 AM
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Originally Posted by DaveGS4
...We love having new guinea pigs that like to try new things
I can only impress upon you my personal experience of what you will be missing not having that extra stall.
I will recommend one thing... get the PI 2800 stall and then if you don't like it, get it adjusted for free during the two years.
What's really interesting to me is there's a fair amount of diversity tolerated when it comes to suspension mods, difference shock/springs/coilovers/sways etc. Does anyone know why there's only one gear and TC used/tolerated on this forum?
02-05-05, 09:41 AM
#28
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Originally Posted by Vette Boy
LOL, based on my TC and gears thread I'd have to say this isn't my experience....it's almost as if everyone is stuck in a rut, esp since nobody has any objective data.
That's a little tongue-in-cheek, but you need to get used to the fact you're on a Lexus forum, not a Chevy forum where there is MUCH more of an aftermarket and many more enthusiasts willing to go the track. I've invested quite a bit in dyno before / after on stuff for mine, so I can help you there... just not on the track. If you search, I think some members have done G-Tech pro runs with these mods for comparison. I know its not the same as a track, but its the same car and same device. Similar issues with weather, location, etc you'd get with a track too.
Originally Posted by Vette Boy
LOL, I was thinking to get 2400 and if it wasn't enough I'd have them change it to 2600.
What's really interesting to me is there's a fair amount of diversity tolerated when it comes to suspension mods, difference shock/springs/coilovers/sways etc. Does anyone know why there's only one gear and TC used/tolerated on this forum?
What's really interesting to me is there's a fair amount of diversity tolerated when it comes to suspension mods, difference shock/springs/coilovers/sways etc. Does anyone know why there's only one gear and TC used/tolerated on this forum?
. It's all subjective feel and comparitive.... just like you're getting here on the TC/LSD. On the suspension there is a boatload of an aftermarket available. When you get to the TC and gears it's a different story... not too many options for our cars.There are THREE gears used on this forum 3.23, 3.76 and 3.9x. (little experience with 3.9x on the GS4, but someone has done it on a SC430). There are three different LSDs folks have used with the TRD, RMM/Supra LSD and ATI Carbon Fiber. There are only two torque converters I've heard of for the GS4 - the PI (also badged as an RMM) and I think Lextreme offers a stock change in stall speed. Level Ten may make one too (can't remember if that is the same as the PI) I'm probably missing one somewhere in there, but this is the extent of the aftermarket for the GS in this area.
So.... sans any additional 'subjective' advice from anyone.... why don't you go to the track and test your GS today, then buy something and install it, test it again and report back to us
.Edit - did a little searching and here's some of the before/after info you were looking for
https://www.clublexus.com/forums/sho...hreadid=136885
2800 stall PI TC before / after install
Originally Posted by BA_GS400
IT'S OFFICIAL!!!! I'm freakin waay faster!!!
old 60' - 2.259
new 60' - 2.043
old 330' - 6.273
new 330' - 5.922
old ET: 14.55@97.68
new ET: 14.17@97.76
I'm ecstatic! 4 tenths. WOW!
and I know I'm eek'n for more like anyone else, but, I gotta tell ya.....1. The air was not quite as good as the old reference run, 2. I had 4gal. more gas, 3. I had 89 octane gas! I suck! The gas in the tank was supposed to be 'wasted' in trips to work, then all of a sudden, BAM! I got "the call" to have the car to the shop! I was tempted to buy 2 gallons of 110 octane race gas to balance things out!!
I did keep everything else the same. Tire pressures, no air filter, spare tire out, e-shift.
All launches were by stabbing the throttle this night. Not enough time to try to "stall" against the converter with the tree counting down. Maybe next time.
old 60' - 2.259
new 60' - 2.043
old 330' - 6.273
new 330' - 5.922
old ET: 14.55@97.68
new ET: 14.17@97.76
I'm ecstatic! 4 tenths. WOW!
and I know I'm eek'n for more like anyone else, but, I gotta tell ya.....1. The air was not quite as good as the old reference run, 2. I had 4gal. more gas, 3. I had 89 octane gas! I suck! The gas in the tank was supposed to be 'wasted' in trips to work, then all of a sudden, BAM! I got "the call" to have the car to the shop! I was tempted to buy 2 gallons of 110 octane race gas to balance things out!!
I did keep everything else the same. Tire pressures, no air filter, spare tire out, e-shift.
All launches were by stabbing the throttle this night. Not enough time to try to "stall" against the converter with the tree counting down. Maybe next time.
https://www.clublexus.com/forums/sho...highlight=3.76
Originally Posted by DrewGS4
Hey Guys
Great to see so many responses to this. yes, I do not have a 3.76 LSD installed. I do plan on installing it in the future.
TLW and everyone in the NJ would love to meet up with you guys. I am in northern NJ in the Morris county area. You can see my flying around on Route 10, 80 or 287. Occasionally I will be on the parkway or turnpike.
As for the unit. This is a newer unit just being sold by ESCORT. The old G-timer was horrible. Indeed it was very inaccurate. However, the newer stuff works and is much better. The times are on the money. I had given this unit a few months back to a friend of mine who races his mustang at Englishtown racetrack. I think on 4 runs the numbers were only off by 1 or 2 tenths of a second off on the quarter mile. The track numbers gave out 12.9 and 12.8 1/4mile. The G-tmer was giving reading of 12.10 or 12.7 respectively. The third run was on the money and the 4th run the timer did not work cause the car was not completely stopped on the launch.
As from my standpoint.....
When I was just running with a K&N FIPK intake I was hitting 6.1 or 6.2 seconds.
I replaced the K&N intake with SRT intake with race ECU and was hitting consistent 5.9 and 6.0 seconds
Finally got the dragon torque Convertor installed and I was hitting 5.6-5.7 seconds consistently. These are the numbers that the car should be running according to Lexus.
** The above runs were made when the weather averaged about 80 degrees.
______________________________________________________
Now with weather being much cooler, I started recording my times again and I am hitting 5.4-5.5 seconds consistently.
My opinion is that this is where the SRT intake really helps by sucking in all that cold outside air with larger tube into the throttle body/engine.
Great to see so many responses to this. yes, I do not have a 3.76 LSD installed. I do plan on installing it in the future.
TLW and everyone in the NJ would love to meet up with you guys. I am in northern NJ in the Morris county area. You can see my flying around on Route 10, 80 or 287. Occasionally I will be on the parkway or turnpike.
As for the unit. This is a newer unit just being sold by ESCORT. The old G-timer was horrible. Indeed it was very inaccurate. However, the newer stuff works and is much better. The times are on the money. I had given this unit a few months back to a friend of mine who races his mustang at Englishtown racetrack. I think on 4 runs the numbers were only off by 1 or 2 tenths of a second off on the quarter mile. The track numbers gave out 12.9 and 12.8 1/4mile. The G-tmer was giving reading of 12.10 or 12.7 respectively. The third run was on the money and the 4th run the timer did not work cause the car was not completely stopped on the launch.
As from my standpoint.....
When I was just running with a K&N FIPK intake I was hitting 6.1 or 6.2 seconds.
I replaced the K&N intake with SRT intake with race ECU and was hitting consistent 5.9 and 6.0 seconds
Finally got the dragon torque Convertor installed and I was hitting 5.6-5.7 seconds consistently. These are the numbers that the car should be running according to Lexus.
** The above runs were made when the weather averaged about 80 degrees.
______________________________________________________
Now with weather being much cooler, I started recording my times again and I am hitting 5.4-5.5 seconds consistently.
My opinion is that this is where the SRT intake really helps by sucking in all that cold outside air with larger tube into the throttle body/engine.
Last edited by DaveGS4; 02-05-05 at 09:58 AM.
02-05-05, 11:41 AM
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Originally Posted by DaveGS4
.... why don't you go to the track and test your GS today, then buy something and install it, test it again and report back to us .
.
02-05-05, 01:10 PM
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old 60' - 2.259
new 60' - 2.043
old 330' - 6.273
new 330' - 5.922
old ET: 14.55@97.68
new ET: 14.17@97.76
new 60' - 2.043
old 330' - 6.273
new 330' - 5.922
old ET: 14.55@97.68
new ET: 14.17@97.76
