SVX Network Forums Live Chat! SVX or Subaru Links Old Lockers Photo Post How-To Documents Message Archive SVX Shop Search |
IRC users: |
#211
|
||||
|
||||
Re: ECU tune Transmission control unit?
I still haven't had a chance to write the routines for the ECUtuner software to quickly modify all the shift maps for any gear ratio but I did manually edit the downshift maps for the stick in D for the 4.44 firmware.
|
#212
|
|||
|
|||
Re: ECU tune Transmission control unit?
I'm having my TCU upgrade and stage 1Av1 fitted tomorrow. Can anyone tell me whether I should still drive in 3 round town or can I use D as nature and Subaru intended?
|
#213
|
|||
|
|||
Re: ECU tune Transmission control unit?
your still going to be better off using 3. In d no engine braking occurs and it still shifts into 4th at too low of speed. However with the increased line pressure that the ecutune gives you should not have lots of clutch slipping like the stock does so it shouldnt kill the trans.
|
#214
|
|||
|
|||
Re: ECU tune Transmission control unit?
Thanks for the reply. 3 it shall be.
|
#215
|
||||
|
||||
Re: ECU tune Transmission control unit?
What did luther campbell say? Throw that d? Put it in D and enjoy. If you drive around in 3 you will have engine braking. You don't want engine braking driving around town unless you really enjoy buying gasoline. You want your car to coast when you let off the gas pedal. When you do want engine braking you can just pull the selector lever back into 3.
|
#216
|
||||
|
||||
Re: ECU tune Transmission control unit?
Also, just so it is clear to anyone else who may read this, driving with the select lever in 3 bypasses the ECUtune shift maps. Our TCUs are meant to be driven in D. You get the benefits of the line pressure maps and overheat prevention modifications in all the stick positions but you have to be in D to get the ECUtune shift maps.
|
#217
|
||||
|
||||
Re: ECU tune Transmission control unit?
Quote:
__________________
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 |
#218
|
||||
|
||||
Re: ECU tune Transmission control unit?
UPDATE;
I just got the ECUTune chip for the 4.44 trans installed in my Pearlie, and put more than 400 miles on it yesterday. I ran it with the Subaru Select Moniter on it AND ran with a GPS to verify actual miles per hour as opposed to the speedometer reading and the reading of the SSM. The most important differance is that now the #1 speedometer reading (back of transmission) now matches the #2 speedometer reading (front of transmission) so that there will be less friction in the front to rear clutch pack! Without the ECUTune TCM the #2 ran a higher MPH than the rear, say 13 mph front wheels and 9 mph rear wheels. Now that the car knows how fast it is really going the shifting is delayed as I requested, and I now have the benefit of the higher line pressures. So, Mike, now I need the TCU replacement chip for the Claret, with the 4.44 ratio and because of the supercharged engine the higher shift rpms. I think it was 7200 into second and 6500 into third and fourth. I am putting a check into the mailbox as we speak. Should I include a check for Nicks valve body as well? Tom
__________________
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 |
#219
|
||||
|
||||
Re: ECU tune Transmission control unit?
Having the correct speed calculated from your vss1 actually corrects a bunch of things, like line pressure. An ECUtune TCU with the modifications to match 4.44 gearing is really a necessity for any SVX with a 4.44 transmission.
Quote:
|
#220
|
||||
|
||||
Re: ECU tune Transmission control unit?
As hot as its been here (90°f+) I drove Christine around town lately
(because She has working AC) Christine is the only SVX that I have on the road with the stock transmission. It also has your TCU and the Stage 1Av1. I really like the shifts in it, just so you know. BTW Nick will be home on August First, after being in the desert for the past six months, and wants me to have his valve body installed by the time He gets home. The check is in the mail.
__________________
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 Last edited by svxfiles; 06-05-2013 at 02:46 PM. |
#221
|
||||
|
||||
Re: ECU tune Transmission control unit?
Mike,
The link you provide on your website, and have included on your ebay auctions, doesn't show the line pressure drop below 5% TPS to enable engine braking: http://www.ecutune.com/images/ECUtun...utyControl.gif You might want to have those links point to your updated Solenoid A map. Also, is there a reason why you never answered my question as to why dropping line pressure is needed to enable engine braking? I am curious as to how the engine stays strongly engaged to the axles if the line pressure driving the clutches and bands is so low. Finally, I did a pin by pin comparison of the TCUs in the OBD2 cars and the TCUs in the OBD1 cars and they look to be nearly identical. There are only a few pins that are questionable or unaccounted for. One says that the OBD2 TCU recieves a MAF signal from the ECU. The OBD1 TCU has the exact same pin connecting to the exact same location on the OBD1 ECU but it is unidentified in the wiring diagrams and pinout I looked at. It is likely that the same exact MAF related signal is on that line. The other two pins/lines that are unaccounted for seem minor. One is tied to a sensor signal ground which is unwired on the OBD1 TCU. Maybe that line was added to the OBD2 TCUs to improve signal quality or eliminate a potential ground loop but it is obviously not needed by the OBD1 TCU and probably has a minor impact on signal quality for the OBD2 TCUs. The last pin/line goes from the TPS supply to the OBD2 TCUs. Again, this is unconnected in the OBD1 TCU. In this case I am assuming that the OBD2 TCU has some logic to verify power is being supplied to the TPS and/or to monitor the exact supply voltage. It probably serves to calibrate the TPS signal and the OBD1 TCUs don't appear to require this signal. In short, it looks like the OBD2 cars can take the OBD1 TCU as a replacement. There are a few assumptions I made above so if anyone has tried an OBD1 TCU in an OBD2 car and found it to not work, please respond to this posting.
__________________
Tony 1996 Polo Green Subaru SVX LSi, 168,XXX miles, Redline D4 ATF, Redline 75W90 gear oil, K&N HP-4001 Oil Filter, Mobil 1 5W50 FS (3qt) and 5W30 High Mileage (4qt) Oil Blend, Motul RBF600 Brake Fluid, AC Delco A975C Air Filter, NGK BKR6EIX-11 plugs, Centric Rotors, Power Stop Evolution Carbon Fiber Ceramic Brake Pads 2005 Gray Acura RL, 165,XXX miles, Redline D4 ATF with Lubegard Platinum Protectant, Mobil 1 5W20 High Mileage Extended Performance Oil 2009 Red Toyota Venza, 123,XXX, Mobil 1 5W30 High Mileage Oil 1992 Red Ferrari 348 ts, 82,XXX, Redline everything |
#222
|
||||
|
||||
Re: ECU tune Transmission control unit?
Quote:
__________________
'94 Laguna Blue LSi ~159k.......JDM ultra short-geared 3.900 STi Version 7 6-speed w/ Cobb shortshifter, ECUtune 244,8.1mm/256,9.1mm i/e cams, group N motor mounts, '97 grille, JDM clear corners, Momo JDM Legacy GT steering wheel, apkarian's LED tails, silver STi BBS wheels, PWR radiator, redstuff pads f/r, drilled/slotted rotors, bontragerworks rsb #18, Koni/GC 450f/375r coilovers, Megan Racing adjustable lateral links, KMac c/c plates, Stebro exhaust, ECUtune 1v5, Optima battery in the trunk where it belongs. Turbo project '97 Ebony LSi ~137k #036.......Power mode mod, JDM clear corners, BBS wheels. AUX/pocket mod Now a mod "over there" ............Photo album |
#223
|
||||
|
||||
Re: ECU tune Transmission control unit?
From what I can tell, yes. They are given different numbers on the wiring diagrams but, other than those two lines that aren't connected on the OBD1, it looks like the plugs and number of lines is the same.
__________________
Tony 1996 Polo Green Subaru SVX LSi, 168,XXX miles, Redline D4 ATF, Redline 75W90 gear oil, K&N HP-4001 Oil Filter, Mobil 1 5W50 FS (3qt) and 5W30 High Mileage (4qt) Oil Blend, Motul RBF600 Brake Fluid, AC Delco A975C Air Filter, NGK BKR6EIX-11 plugs, Centric Rotors, Power Stop Evolution Carbon Fiber Ceramic Brake Pads 2005 Gray Acura RL, 165,XXX miles, Redline D4 ATF with Lubegard Platinum Protectant, Mobil 1 5W20 High Mileage Extended Performance Oil 2009 Red Toyota Venza, 123,XXX, Mobil 1 5W30 High Mileage Oil 1992 Red Ferrari 348 ts, 82,XXX, Redline everything |
#224
|
|||
|
|||
Re: ECU tune Transmission control unit?
Quote:
|
#225
|
|||
|
|||
Re: ECU tune Transmission control unit?
I'm selling 2 of these for 75$ each!
__________________
Nightmare is the name of the car... |
|
|