2004 2.5i computer

by **JoeDaleyN98** » Sun Jun 23, 2013 7:44 am

Hi all, was enquiring as to the tuning ability of my gen4 ej25 computer! Was looking at getting it tuned to back up the gains I have had from my exhaust upgrades.

by **zch91** » Sun Jun 23, 2013 9:13 am

Your ecu is Hitachi therefor not tune-able

by **JoeDaleyN98** » Sun Jun 23, 2013 1:32 pm

Damn that's a pain, is a later model
Like an 06 interchangeable with it?

by **zch91** » Sun Jun 23, 2013 2:37 pm

Short answer: no

by **blademaster** » Tue Jun 25, 2013 12:25 am

long answer: yes with expensive difficulties

by **JoeDaleyN98** » Tue Jun 25, 2013 7:08 am

Can an aftermarket computer be piggybacked off it?

by **turner_822** » Wed Jun 26, 2013 8:20 am

There are optios to go to an aftermarket ECU but you are talking $thousands$...it would sadly probably be cheaper/easier to sell your car and go to a model with a Denso ECU.

Its just not worth the money for a tune...maybe is you planned on a full "blown and intercooled" system it could be justified, but even then I think Blademaster would still try to talk you out of it, as he had to spend the time and money on one.

by **JoeDaleyN98** » Wed Jun 26, 2013 4:52 pm

I was going to turbo actually, so no other computers from liberties will plug and play without huge work involved in harnesses etc...

by **blademaster** » Thu Jun 27, 2013 8:45 pm

le correcto

lol, also, it says you have a Gen3 2001 RX, supercharge that! it will actually be easier and cheaper

by **JoeDaleyN98** » Fri Jun 28, 2013 8:38 am

Hahaha I had on gen 3 rx but hated the look and interior so got a gen4

by **blademaster** » Fri Jun 28, 2013 10:42 am

really? I like the look, esp in black.
Oh well, each to their own. Good luck with car-stuff!

by **turner_822** » Sat Jun 29, 2013 5:20 am

blademaster wrote:supercharge that! it will actually be easier and cheaper

+1
There's also more "do it yourself" work when supercharging. Happy power hunting!! :mrgreen:

by **DownUnder** » Wed Jul 03, 2013 1:26 am

I'm still confused as to why the Hitachi's and Denso's have different wiring as I can't see it in the service manual. That being said I have identified a few differences in engine bay wiring. Especially a few Hitachi components that are gone with the Denso.

by **turner_822** » Wed Jul 03, 2013 10:41 am

I wish Subaru would get rid of their Hitachi ECU's all together!!! The Denso is so flexible and easy to tune...so so SO many people that want to tune/modify get on these forums and are :angry2:

to find out their Hitachi ECU is unsupported.

by **dmh87** » Wed Jul 03, 2013 10:04 pm

turner_822 wrote:I wish Subaru would get rid of their Hitachi ECU's all together!!! The Denso is so flexible and easy to tune...so so SO many people that want to tune/modify get on these forums and are to find out their Hitachi ECU is unsupported.

QFT!