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#1
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JDM ECU...HP Increase?
I have in my possession a JDM SVX ECU (and TCU), anyone know if it would give any gains in HP or Torque, when plugged into a USD SVX?
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Huck Subaru Ambassador 92 SVX LS-Tour Magnaflow Exhaust, 5-Spd-AWD 88 XT6 AWD 5-Speed "Bride of FrankenWedge" 15 Impreza Premium Sedan 15 Crosstrek XV 5-Speed My 5-Speed "How-To" Write-up 1976 Pontiac Firebird Formula Current Count of Subaru's Owned.... "70" |
#2
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Re: JDM ECU...HP Increase?
Where did you find that? I thought they very hard to come by.
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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 |
#3
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Re: JDM ECU...HP Increase?
I don't believe so Huck. The main difference is that the JDM won't look for anything related to the EGR since JDM motors didn't have them.
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#4
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Re: JDM ECU...HP Increase?
A XT buddy Down under bought a JDM clip, I got a few things from him before he scrapped it.
Quote:
Thought I might drop it into FrankenWedge(which is currently running a 95 US-ECU...)
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Huck Subaru Ambassador 92 SVX LS-Tour Magnaflow Exhaust, 5-Spd-AWD 88 XT6 AWD 5-Speed "Bride of FrankenWedge" 15 Impreza Premium Sedan 15 Crosstrek XV 5-Speed My 5-Speed "How-To" Write-up 1976 Pontiac Firebird Formula Current Count of Subaru's Owned.... "70" |
#5
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Re: JDM ECU...HP Increase?
Test it with your butt dyno
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Cam '92 Ls-L Dark Teal 11:1 CR ECUTUNE pistons ECUTUNE .256 duration intake/exhaust cams ECUTUNE STAGE 2AV1 ECU Z32 MAF/SR20DET injectors Balanced & Blueprinted |
#6
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Re: JDM ECU...HP Increase?
I may throw it in to see if I can "Feel" any difference...I don't figure it can hurt any.
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Huck Subaru Ambassador 92 SVX LS-Tour Magnaflow Exhaust, 5-Spd-AWD 88 XT6 AWD 5-Speed "Bride of FrankenWedge" 15 Impreza Premium Sedan 15 Crosstrek XV 5-Speed My 5-Speed "How-To" Write-up 1976 Pontiac Firebird Formula Current Count of Subaru's Owned.... "70" |
#7
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Re: JDM ECU...HP Increase?
I'll trade you a stage 1av1 for them. That will make your car faster.
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#8
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Re: JDM ECU...HP Increase?
I'll Probably take you up on that Mike...
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Huck Subaru Ambassador 92 SVX LS-Tour Magnaflow Exhaust, 5-Spd-AWD 88 XT6 AWD 5-Speed "Bride of FrankenWedge" 15 Impreza Premium Sedan 15 Crosstrek XV 5-Speed My 5-Speed "How-To" Write-up 1976 Pontiac Firebird Formula Current Count of Subaru's Owned.... "70" |
#9
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Re: JDM ECU...HP Increase?
My though was that the TCU would be extremely valuable to someone looking to swap in a JDM auto transmission. Especially since they are available and cheap. But even better would be to have someone reverse engineer it then offer it as an TCU upgrade option on their website. (hint, hint LAN)
Not sure if such a thing is possible, but I can hope!
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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 |
#10
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Re: JDM ECU...HP Increase?
Quote:
The JDM ECU maps are different to USDM, they are optimised for higher octane fuel. Like Nate said, no EGR. I've run a JDM car on a UK ECU which is similar to maps and didn't notice any performance difference. The TCU won't work properly with a USDM gearbox. Already been done.
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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 |
#11
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Re: JDM ECU...HP Increase?
Quote:
Tom |
#12
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Re: JDM ECU...HP Increase?
I don't recall, and Michael has them now, he might be able to cross reference the numbers to find out.
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Huck Subaru Ambassador 92 SVX LS-Tour Magnaflow Exhaust, 5-Spd-AWD 88 XT6 AWD 5-Speed "Bride of FrankenWedge" 15 Impreza Premium Sedan 15 Crosstrek XV 5-Speed My 5-Speed "How-To" Write-up 1976 Pontiac Firebird Formula Current Count of Subaru's Owned.... "70" |
#13
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Re: JDM ECU...HP Increase?
Quote:
I've inspected the hardware of JDM, USDM and Euro/Aussie TCUs. The JDM and USDM are almost identical. The only difference is a couple of extra components on the USDM (presumably to handle the atmospheric pressure signal). I built some custom TCUs for Ron based on JDM firmware running on USDM hardware and they work very well. The Euro/Aussie unit is very different. They use the different speed sensor arrangement and don't work properly with JDM/USDM firmware.
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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 |
#14
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Re: JDM ECU...HP Increase?
Positive... Even with the JDM firmware loaded into the US TCU of mine, the forward speed sensor was not reading the same as the rear
Tom |
#15
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Re: JDM ECU...HP Increase?
I got the JDM ECU and TCU from Huck. They look to be 94 JDM units matching what Phil already has on his website.
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