SVX Network Forums Live Chat! SVX or Subaru Links Old Lockers Photo Post How-To Documents Message Archive SVX Shop Search |
IRC users: |
#16
|
|||
|
|||
Re: JDM ECU...HP Increase?
Well, if it helps I have a JDM SVX, which I run on 'Tesco 99'. It appears to be significantly quicker than the wife's 3.0 A4 Quattro. Both have similar weights and claimed bhp. Audi brakes, however, are awesome.... sorry guys.
|
#17
|
|||
|
|||
Re: JDM ECU...HP Increase?
Were you running your 3.545 VTD box with JDM firmware?
__________________
Special Thanks to Our Friends and Sponsors: * http://www.alcyone.org.uk/ssm http://www.PhenixWheels.com http://www.dba.com.au/ http://www.ClassicSoftTrim.com http://ToyoTires.com/tire/pattern/versado-lx Gillman Subaru of Houston "QuickChange" http://www.TransGo.com/ http://www.PlanetSVX.com Bontrager Works, '92 Subaru SVX LS-L Claret ORIGINAL OWNER '92 LS-L Pearl~ '92 LS Pearl~ '92 LS-L Teal~ '92 LS-L Silver~ '95 LSi Polo~ '92 JDM Alcyone SVX Version-L 4WS Pearl~ http://www.subaru-svx.net/forum/showthread.php?t=54143 '92 JDM Alcyone SVX Version-L 4WS Ebony~ http://www.subaru-svx.net/forum/showthread.php?t=54117 |
#18
|
||||
|
||||
Re: JDM ECU...HP Increase?
That would definitely explain it. There's a value in the TCU that needs to be calibrated to the diff ratio to make things work properly.
__________________
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 |
#19
|
||||
|
||||
Re: JDM ECU...HP Increase?
Does it work the same on the US type as the VTD? If you could publish it that would probably be a good thing for all the people running 4.11s and 4.44s to modify on their cars.
|
#20
|
||||
|
||||
Re: JDM ECU...HP Increase?
Hey Michael,
How's your software coming along? The one that lets people tune their ECU? Phil.
__________________
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 |
#21
|
||||
|
||||
Re: JDM ECU...HP Increase?
I haven't worked on it since getting it to work for downloading that 96 TCU bin. I'm going to release it as copyleft freeware so even if I don't finish it I'll publish what i do have done complete with source code.
|
#22
|
|||
|
|||
Re: JDM ECU...HP Increase?
what software are you working on now?
I might have a go at decoding some of the ECU if I get bored. |
#23
|
|||
|
|||
Re: JDM ECU...HP Increase?
Check your dates, you bumped a thread from 2010.
though i am curious about an option to tune these cars ourselves, i do have a friend with a 4 wheel dyno i wouldnt mind throwing my car on eventually to try and tune.
__________________
1992 SVX Pearlie: AmsOil signature synthetic 10w40 and Ea15k20 filter, Cobb crank pulley, Outlaw Engineering spacers and tb bypass, LGT 5spd, Slotted Crossdrilled rotors and ceramic pads, 11:1 compression, EGR delete, Port & Polished heads, SaikoMichi catch can, A/c delete. |
#24
|
||||
|
||||
Re: JDM ECU...HP Increase?
Quote:
http://www.subaru-svx.net/forum/showthread.php?t=60338
__________________
92 pearl SVX about to revive 92 Black 4ws (Jap spec) SVX 93 black SVX 93 Liquid Silver SVX - sti 6 speed with R180 diff, my05 sti steering wheel, sti alloy lateral links, 19x8.5 275/30 42mm offset front and 19x8.5 275/30 22mm offset on the rear, 6 pot brembo caliper with 355 rotors front, 2 pot brembos rear 95 bright red SVX 96 emerald pearl SVX about to revive |
#25
|
|||
|
|||
Re: JDM ECU...HP Increase?
Quote:
If you check the alcyone website, everything you need to tune yourself is on there, it just takes a bit of learning before you can use it. For example, they've got rom dumps of all the different SVX ECU's, so with rom raider you can look at this in a nice graphic format, and change values (after you find a definition file that works for them, the alcyone website definitions file wouldn't work with the 1994 usdm SVX ecu .bin file that they hosted, but I found another one that would work). Next step would be to build yourself a memory adapter that he posts a blueprint/diagram for (or buy one from ecutune, your final price is the same, but the ecutune is easier, vs the DIY which nets you 3 instead of 1 board). Then you just go to ebay and buy a $20 chip burner, digikey for the electronic components, and assemble it all together. Then you get the fun of changing values, plugging the chips in, testing, going back and chanigng more values, plugging in, testing, and on and on until you have a tune you like. The problem I'm having is that we've only got addresses for the fueling, timing, and timing advance tables. So, if you want to switch mafs or injectors, I still need to find the addresses for those scaling tables. Which is where we get into disassembly, and a whole lot more guessing and checking. Disassembly literally involves changing the binary code into hex, and then hoping you can convert the hex into subroutines with your mind by looking for certain markers (Hint, the values for things like the coolant temp sensor and maf are easily found from the SSM subroutine), and then follow those subroutines to see where they get their data from, which is the scaling tables! Then you add those locations to the Rom Raider definitions, and you get more nice pretty tables to modify, burn, test, re-modify, etc. So yeah, this isn't exactly for the feint of heart, or the people with busy lifestyles! Last edited by BRZCory; 05-15-2013 at 04:06 PM. |
Thread Tools | |
Display Modes | |
|
|