ECU/Chip J-spec vs. Euro

Post by **chezina** » Mon Nov 25, 2002 11:05 am

I just wanna know if u can run a chip that's programmed for a J-spec ECU in an Euro spec ECU (cause the euro model doesn't have the variable intake runners and they are controlled by the ECU/chip also)? Is anyone running a Euro model with a J-spec chip?

Post by **JDM_1990_S13** » Mon Nov 25, 2002 11:05 am

the secondary intake runners are not controlled by the ecu they are controlled by intake manifold vaccum, it will maybe jsut run a little rich, but all chips do anyway... shouldn't be a problem..

Post by **paul_s13** » Mon Nov 25, 2002 11:05 am

Just disconnect the vacuum/boost pipe to the secondary throttle valve actuator, this will keep them open all the time, that will make it more like the euro spec head for flow.

Post by **chezina** » Mon Nov 25, 2002 11:05 am

Thanx for the info!JDM_1990_S13 u are right it's not controlled by the ECU, i wasn't shure cause i found out the j-spec ECU uses pin8 for the secondary intake runner but it's not for controlling it's for feedback from the intake runner to recalculate the A/F ratio.

Post by **JDM_1990_S13** » Mon Nov 25, 2002 11:05 am

no problemo meng... what chip are you going to use?? i suggest a Jez Horsham Chip i have only heard the best from users and it is less than half the cost of a JWT chip.

http://bagpuss.swan.ac.uk/horsham-developments/

Post by **Movingviolation240** » Mon Nov 25, 2002 11:05 am

I thought it was vacume controled by the computer via an electronicly controlled switch.

Regardless I got rid of mine, I really don't know if there was an improvement or not, but it just makes me feel better knowing my ports are smooth now

Mine didn't come with the controller so I just ran it off a straight vacume source and it worked fine.

PaulOrlando, FL

Post by **chezina** » Mon Nov 25, 2002 11:05 am

Yep, it will be a chip from Horsham Dev.!The best choice in my opinion if u are looking for an ECU upgrade, unless u can grab something(that suits your needs) really cheap.

ECU/Chip J-spec vs. Euro

ECU/Chip J-spec vs. Euro

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