thinking about switching to jdm 2jz ecu, any input would be great

[86_sports_1jz]

hey guys, my auto 1j soarer ecu went bad on me again on the dyno two nights ago... i've been seriously considering switching to a jdm 2jz ecu because i'm tired of buying and repairing the ecu's. i've searched to see what the benifits are to going from 1jz ecu to 2jz ecu but didn't come up with much... all i got is that it is a better ecu with better timming control which cause a single turbo setup to spool faster and it ofcourse don't keep blowing caps like the 1j ecu's. the only downside i found was that the rev limiter is moved from 7k or 7200 to 6500 or 6800 rpms, just alittle shorter. i was just wondering what your inputs would be (other benifits and downfall?), let me know any input is appreciated!


thanks, toua

[aphxero]

I think later 1j ecu would be preferable. They are cheap and easy to get. Change connectors and you're good.

[86_sports_1jz]

well i want to use my greddy emanage also, so i'm going to have dr. tweak make me a jumper harness for a 2jz ecu and have the emanage hooked up to the harness.

[tissimo]

Imo the car drives much better with the 2jz ecu. Its a good alternative to going standalone. You could get a Geforce ecu later on if you wanted a higher rev limter.

[OneJSupra]

Imo the car drives much better with the 2jz ecu. Its a good alternative to going standalone. You could get a Geforce ecu later on if you wanted a higher rev limter.

Agreed it does run a whole lot better even outside boost.

Hey Justin, just curious in what else it will need to run g-force ecu?

[86_sports_1jz]

ok thanks guys, what is the g-force ecu? who can wire jumper harnesses besides dr. tweak? dr. tweak said he could make one for me but he is charging me quite a bit including the wiring for my emanage and i'm really tight on money right now? so what does the 2j ecu offer different from the 1jz? it definitely seems like a better option

toua

[Guyana00]

I've seen vague threads as well and was wondering myself, but if some facts bould be put into this post it would end it all. If people search for it that is.

[GotTurbos?]

Yes I recently did this swap, it runs 10x better. Everyone is leaving out that the 2jz's have sequential injection! You have to run new wires to 3 injectors as the ecu sends signals for each cylinder instead of in pairs of 2. So you can't just plug in a jumper harness and go. The 6800 rev limiter is kind of a bummer but as was posted, you can get an aftermarket 2j ecu and get rid of that. You should DEFINITELY make the switch from 1j to 2j ecu, the car just is smoother no matter what I'm doing compared to the stock ecu.

The G-Force ecu is just an aftermarket ecu for the 2j's kinda like how the 1j has mines and such. It raises the rev limiter to like 8k or higher in some cases, and modifies the fuel and timing maps. There is nothing you need to change when going from a normal 2jz ecu to a g-force.

[tissimo]

You would need a Map ECU or HKS VPC to run the US ECU (G Force included), to emulate the MAF signal to the ecu.

The US MKIV ECU has a 7000 rev limiter IIRC, its a slight bump from the 6700-6800 of the Aristo.

[86_sports_1jz]

ok thanks, so i'm guessing the g-force ecu is only offered for the usdm ecu? has anyone tried the emanage ultimate with a jdm 2jz ecu and successfully raised the rev limit on the ecu?


toua