Go Back   Club Lexus Forums > Lexus Model Forums > SC Models > SC 400/300 > Performance & Maintenance
Sign in using an external account
Register Forgot Password?

Want better low end performance, try this! It's free!

Reply
 
 
 
 
Thread Tools Search this Thread Display Modes
Old 10-23-12, 08:50 PM   #211
CityKnight
Lexus Test Driver
Trader Score: (1)
 
CityKnight's Avatar
 
Join Date: Nov 2008
Location: PA
Posts: 841
Send a message via AIM to CityKnight
Default

So have any '96+ owners done this yet?
I kinda want to, and installing a switch sounds good.
This ad is not displayed to registered members.
Register your free account today and become a member on Club Lexus!
__________________
http://i34.photobucket.com/albums/d120/The5thArchangel/SC300-NoFatChicksWillRub.png
CityKnight is offline   Reply With Quote
Old 10-23-12, 09:00 PM   #212
xspsi6
Lexus Champion
Trader Score: (31)
 
xspsi6's Avatar
 
Join Date: Jul 2007
Location: Leesburg FL
Posts: 2,706
Default

I think it will work for obd2 people but for sure it will throw a check engine light.
__________________
1994 supra 6spd 612whp pump gas
1997 RSP/black sc400 (1jzgte,BWS366& supporting mods on aristo trans and wire harness, built auto all under way)
xspsi6 is offline   Reply With Quote
Old 10-28-12, 07:29 PM   #213
xspsi6
Lexus Champion
Trader Score: (31)
 
xspsi6's Avatar
 
Join Date: Jul 2007
Location: Leesburg FL
Posts: 2,706
Default

Here is a guy who says he used an 11.2 ohm resistor to get rid of the cel on an obd2 car which is interesting
http://www.toyotanation.com/forum/10...ode-p1765.html
__________________
1994 supra 6spd 612whp pump gas
1997 RSP/black sc400 (1jzgte,BWS366& supporting mods on aristo trans and wire harness, built auto all under way)
xspsi6 is offline   Reply With Quote
Old 10-28-12, 07:33 PM   #214
xspsi6
Lexus Champion
Trader Score: (31)
 
xspsi6's Avatar
 
Join Date: Jul 2007
Location: Leesburg FL
Posts: 2,706
Default

I just did this to my 97 sc400 and although I have not taken it for a drive yet I am getting a hard code P1765 TOYOTA - Linear Shift Solenoid Circuit Fault
So I will see how it behaves shortly.
__________________
1994 supra 6spd 612whp pump gas
1997 RSP/black sc400 (1jzgte,BWS366& supporting mods on aristo trans and wire harness, built auto all under way)
xspsi6 is offline   Reply With Quote
Old 10-28-12, 08:34 PM   #215
xspsi6
Lexus Champion
Trader Score: (31)
 
xspsi6's Avatar
 
Join Date: Jul 2007
Location: Leesburg FL
Posts: 2,706
Default

Ok it does seem to have better low end but I have 275's out back and they would not turn over before now if I get on the converter from a dig she will roast them most of the way through 1st gear and although I did not notice hard down shifts it does seem more alive I guess you could say, I was down there doing some work and I figured why not? Now I will put it on a switch before putting it back together.
__________________
1994 supra 6spd 612whp pump gas
1997 RSP/black sc400 (1jzgte,BWS366& supporting mods on aristo trans and wire harness, built auto all under way)
xspsi6 is offline   Reply With Quote
Old 10-28-12, 09:05 PM   #216
durps
Lead Lap
Trader Score: (8)
 
durps's Avatar
 
Join Date: Nov 2011
Location: Jersey
Posts: 594
Default

How could I wire this to my PWR button
durps is offline   Reply With Quote
Old 10-28-12, 09:12 PM   #217
MooJohn
Lead Lap
Trader Score: (0)
 
MooJohn's Avatar
 
Join Date: May 2011
Location: GA
Posts: 485
Default

You'll notice that any WOT that results in a downshift to first will be a lot more "productive" than before. I think even a downshift from 60 mph to pass somebody is night and day difference.

It's how the car should have been from the factory.

durps - I planned to use the wire for the ECT Power dash light to trigger a relay but I decided why bother. I just left the wire cut permanently. On my OBD1 car it doesn't cause any CELs and I see no reason to ever want it back the old way.
__________________
92 SC400 - ongoing resto project
MooJohn is offline   Reply With Quote
Old 10-28-12, 09:55 PM   #218
xspsi6
Lexus Champion
Trader Score: (31)
 
xspsi6's Avatar
 
Join Date: Jul 2007
Location: Leesburg FL
Posts: 2,706
Default

Well my car has always shifted firm for some odd reason so that maybe why I did not notice any real difference when shifting but sitting on the converter from a dig gets the car out of the hole much quicker than before so it behaves like a v-8 should down low but falls on it's face up top lol
__________________
1994 supra 6spd 612whp pump gas
1997 RSP/black sc400 (1jzgte,BWS366& supporting mods on aristo trans and wire harness, built auto all under way)
xspsi6 is offline   Reply With Quote
Old 10-29-12, 03:30 AM   #219
CityKnight
Lexus Test Driver
Trader Score: (1)
 
CityKnight's Avatar
 
Join Date: Nov 2008
Location: PA
Posts: 841
Send a message via AIM to CityKnight
Default

I shoulda been more specific haha ... "Has anyone had success with this, on a 96+ Sc300?"
__________________
http://i34.photobucket.com/albums/d120/The5thArchangel/SC300-NoFatChicksWillRub.png
CityKnight is offline   Reply With Quote
Old 10-29-12, 09:18 AM   #220
xspsi6
Lexus Champion
Trader Score: (31)
 
xspsi6's Avatar
 
Join Date: Jul 2007
Location: Leesburg FL
Posts: 2,706
Default

It was a success I would say but as expected the cel came on but other than that it does exactly what it was supposed to do.
__________________
1994 supra 6spd 612whp pump gas
1997 RSP/black sc400 (1jzgte,BWS366& supporting mods on aristo trans and wire harness, built auto all under way)
xspsi6 is offline   Reply With Quote
Old 10-29-12, 03:13 PM   #221
maynanator
Lead Lap
Trader Score: (1)
 
Join Date: Oct 2009
Location: texas
Posts: 506
Default

could someone explain how to do the ect power switch set-up? by explain i mean a very thorough, which wire goes where, and what panels i need to take off to find the areas to splice. thanks
maynanator is offline   Reply With Quote
Old 10-29-12, 09:00 PM   #222
xspsi6
Lexus Champion
Trader Score: (31)
 
xspsi6's Avatar
 
Join Date: Jul 2007
Location: Leesburg FL
Posts: 2,706
Default

Don't really know about that as I am just going to run a micro switch by the fuel release in the blank plate that is there.
__________________
1994 supra 6spd 612whp pump gas
1997 RSP/black sc400 (1jzgte,BWS366& supporting mods on aristo trans and wire harness, built auto all under way)
xspsi6 is offline   Reply With Quote
Old 10-31-12, 04:41 AM   #223
CityKnight
Lexus Test Driver
Trader Score: (1)
 
CityKnight's Avatar
 
Join Date: Nov 2008
Location: PA
Posts: 841
Send a message via AIM to CityKnight
Default

Quote:
Originally Posted by xspsi6 View Post
It was a success I would say but as expected the cel came on but other than that it does exactly what it was supposed to do.
LOL, yeah, but you're on an Sc400!
__________________
http://i34.photobucket.com/albums/d120/The5thArchangel/SC300-NoFatChicksWillRub.png
CityKnight is offline   Reply With Quote
Old 10-31-12, 06:21 AM   #224
Clean400
Lead Lap
Trader Score: (2)
 
Clean400's Avatar
 
Join Date: Jun 2009
Location: Quebec
Posts: 522
Default

Has anyone done any tests on this when you give the ECU signal a 5V constant instead of cutting it?

It's my understanding that the ECU progressively raises voltage from 0-5V to enable the smooth increase in line pressure. Does having it cut automatically default the signal for line pressure to be Full line pressure? It would be interesting if someone could test this and measure the line pressure changes when gives it varying voltages between 0 and 5v.
__________________
92 SC400 - NF210 / Tokico Blues - TRD Sports 18" - 95 Lights - 4300k HID - Green Lip & B-Pillars - BFI - 4th Solenoid Mod - Strut Bar - Wet Nano Nitrous - Mishimoto Rad - B&M Trans Cooler - Poly Steering & Diff Bushings - Audio/Video/PS2 - Transgo 340 Shift Kit - Torsen LSD 4.08 - LS400 BBK - 2800RPM TC - ES300 Wood Steering
Parts not installed: AEM FIC 8 & Failsafe Wideband - NX Maximizer 4 - GTspec Rear strut - Supra TT F/P - Titan Line Lock - Vortech V3 Si
93 SC400 - Stock
Clean400 is offline   Reply With Quote
Old 10-31-12, 10:45 AM   #225
MooJohn
Lead Lap
Trader Score: (0)
 
MooJohn's Avatar
 
Join Date: May 2011
Location: GA
Posts: 485
Default

The solenoid is a bleed, meaning that when it isn't energized the trans pressure is normal. Most other models of the same trans don't even have the solenoid present. With the mod the pressure isn't ever really "raised" -- it just isn't "lowered".

Triggering the solenoid lowers line pressure and causes slip, and makes a nice comfy gear change at the expense of clutch packs and overall power delivery.
__________________
92 SC400 - ongoing resto project
MooJohn is offline   Reply With Quote
Old 10-31-12, 10:45 AM
 
 
 
 
Reply

Similar Threads
Thread Thread Starter Forum Replies Last Post
Write up: Suprastick into SC400. KC95SC400 Performance & Maintenance 21 01-06-13 05:20 PM
Another SC400 with A340e shift issues Bertman Performance & Maintenance 0 10-05-12 02:36 AM
Engine Diagnostic tools and pc tools (includes all trouble codes) Australian RX - First Generation 13 09-19-11 02:19 AM
Planned: Suprastick and Amsoil KC95SC400 Performance & Maintenance 28 02-19-09 12:32 PM
Going to mod my SC400 auto box A340e KC95SC400 Performance & Maintenance 52 12-03-08 07:46 AM


Tags
1995, 94, a340e, a342e, automatic, downshift, es300, flashing, lexus, light, od, p0715, ranger, sensor, speed, toyota, transmission

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Forum Jump

All times are GMT -7. The time now is 07:01 AM.

Join ClubLexus
Advertising


Copyright © 2000-2008 Internet Brands, Inc. All Rights Reserved
Privacy Policy | Disclaimer | Terms of Use | JOBS


Get all contact info