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#16
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Re: ECU tune Transmission control unit?
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-Bill
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Retired NASA Rocket Scientist Most famous NASA "Child" - OSIRIS-REx delivered samples from asteroid BENNU to Earth in Sept. 2023 Center Network Member #989 '92 Fully caged, 5 speed, waiting for its fully built EG33 '92 "Test Mule", 4:44 Auto, JDM 4:44 Rear Diff with Mech LSD, Tuned headers, Full one-off suspension '92(?) Laguna, 6 spd and other stuff (still at OT's place) My Locker |
#17
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Re: ECU tune Transmission control unit?
I think you are thinking of the ECU, the engine control unit. The tcu, the transmission control unit controls the automatic transmission soley and is removed when it is removed.
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#18
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Re: ECU tune Transmission control unit?
I got mine Friday.
And did not have time to open the box untill Sunday. I will be putting it in my SC Claret, but for now it's in my stock 93 Red SVX. OK, stock except for a ECUTune Stage 1 Version 5 chip. I drove it yesterday, but only far enough to find that it does shift at higher RPMs, and I believe that it's holding in the gears longer. Today I'll drive it like a normal person to get a better feel and report back. Thanks again LAN.
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www.svxfiles.com The first SuperCharged SVX, the first 4.44 gears, the first equal length headers, the first phenolic spacers, the first Class Glass fiberglass hood, the first with 4, 4.44s in his driveway Fiberglass Hood thread My locker 4.44 Swap link |
#19
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Re: ECU tune Transmission control unit?
If I run the hydra then I don't need the TCU correct? or do I not even need it now? I'm confused.
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#20
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Re: ECU tune Transmission control unit?
Quote:
PS, YourConfused is in Texas!
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www.svxfiles.com The first SuperCharged SVX, the first 4.44 gears, the first equal length headers, the first phenolic spacers, the first Class Glass fiberglass hood, the first with 4, 4.44s in his driveway Fiberglass Hood thread My locker 4.44 Swap link |
#21
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Re: ECU tune Transmission control unit?
lol are you serious?? should I pull it out then?? was the NSS bypass wiring a part of the ECU harness?? I'm running a wrx 5spd. Also, I'm gonna get the hydra in a few months.
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#22
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Re: ECU tune Transmission control unit?
smart ass old man! hahahaha lol
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#23
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Re: ECU tune Transmission control unit?
Quote:
It holds the car in the lower gears for longer letting the engine get up to "towing speed". The one thing that I did not like about the SVX, stock or 4.44 was that it shifted out of first gear in like ten feet! LAN burned this one for my Claret so it (at WOT) has the 7200 shift to second that is most likely too high for a stock engine. So on my next chip for the Red 93, I'll get the stock 6500 RPM mapping. For $50.00 if you can solder it in yourself, this thing is a steal! Thanks, again, LAN
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www.svxfiles.com The first SuperCharged SVX, the first 4.44 gears, the first equal length headers, the first phenolic spacers, the first Class Glass fiberglass hood, the first with 4, 4.44s in his driveway Fiberglass Hood thread My locker 4.44 Swap link |
#24
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Re: ECU tune Transmission control unit?
Yes, I've found this pretty ridiculous ever since I first got my SVX. It also pretty much doesn't downshift into first unless you basically come to a complete stop... What were they thinking?
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#25
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Re: ECU tune Transmission control unit?
I was driving Old Tom's Red SVX with the ECU tune quite bit yesterday while I was getting car worked on. I can honestly say that it made dramatic improvement over the stock SVX set up. My impression was that shifts were at a slightly higher RPM, were firmer and it just felt more right to me.
A soon as I can afford it, I will be putting one in my car.
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1992 LSL ebony pearl 170k - Thank you Ron Mummert Reading Box of Wine Car ----------------------------------- 1992 SVX LSL 5-Speed Sold at 180K 2019 1995 SVX Lsi Polo Sold at 118K 2007 |
#26
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Re: ECU tune Transmission control unit?
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1994 SVX L - FWD Barcelona Red 190K miles ~ SOLD 1994 SVX LS - 5spd AWD Emerald Green 202k miles PWR Radiator, HID 5000k, New paint job with issues, 17" STI BBS wheels, converted to 5spd AWD from FWD. Purchased from SVXyGirl 2/20/09 -- Undergoing complete rebuild 1993 Justy 4wd 5door- Teal of sorts , beater. 2008 OBXT Newport Pearl 65k miles |
#27
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Re: ECU tune Transmission control unit?
I just now had a chance to check out my gas mileage on "Christine".
255 miles and 12.6 gallons of 92 octane..... 20.238095 MPG!!!!! Thats with all non highway driving, (althoough at highway speeds.) This is unexpected. I'll have to check out my records, but I think She usually gets about 18.mpg. More later.
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www.svxfiles.com The first SuperCharged SVX, the first 4.44 gears, the first equal length headers, the first phenolic spacers, the first Class Glass fiberglass hood, the first with 4, 4.44s in his driveway Fiberglass Hood thread My locker 4.44 Swap link |
#28
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Re: ECU tune Transmission control unit?
Okay, so is there any plan to further crack this thing? I would buy one right away if it could change the lockup to more like 90-100f and the at oil temp light trigger to more like 215. I don't imagine this is in the part of the tcu that is being changed...or is it?
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2007 GS 450h-Active Stabilizer/Radar cruise 1994 L Blue 3.70 VTD ASE Master Automobile ASE Advanced Level Specialist Toyota Master Diagnostic Technician (former life) |
#29
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Re: ECU tune Transmission control unit?
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I suggest you don't wait. Buy LAN's modified TCU now and have some fun with it.
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Subaru ECU and TCU Website 1992 Alcyone SVX Version L 1992 Alcyone SVX Version L 1994 Alcyone SVX S40-II 2004 Subaru Legacy 2.5 SE Sports Tourer 1996 Subaru Legacy 2.2 GX Wagon 1988 Subaru Justy J12 SL-II |
#30
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Re: ECU tune Transmission control unit?
I only remember a couple places in the code that compared with the atft so finding the location for the data for the threshold for the warning light shouldn't be hard. I'll try to motivate on that today but I have a couple other things I'm far more interested in so no promisses. At first I thought the warning light was almost pointless because if the fluid in a propperly filled transmission is getting schorching hot it's because the transmission is bad so it's kind of a buy a new trans light but since they overheat if you put too much fluid in them and it's hard to read the dipstick it would be good to have a low warning temp to warn people who get it wrong--could save some transmissions.
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