Thread: VE Swap ? about ECU

update,

Got her started and running, everything is working fine, have not set up the VVL activation yet via the switch. Just got her running moved her around a bit to make sure all is well, which is was. Now the starter went out (was the original one from the car) ordered new one from Nissan is otw. Just need to get exhaust all complete from downpipe back otherwise all is well so far. I did use the VE ECU and all seems well so far but does idle a bit rough, just assuming back pressure issue without no real exhaust.

I did use the de harness that came in the car, only issue i have so far is that i must use the de maf, because the harness that came with the ve was missing the maf wiring, the maf was there but no plug in Any suggestions on that one.

Also i for the life of me cannot figure out how to uplaod photos on here if anyone can help please PM me thanks!

Mismatched maf is going to be a problem. You should be able to wire it up using some mini-spade connectors.

Put your images on Photobucket, and post them here.

C

i see no point tryin to use the ve ecu, you'd probably be ok just using the stock de ecu until you can get something tuneable.. but as long as the pinouts match up then you should be ok when you sort the maf wiring out.

the ve ecu runs fine as long as you have the correct maf. It also helps if your running the ve dist. A de unit will work but the timing will be off. iirc The stock ecu activates the cams at 4300 intake and 4500 for the exhaust. the rev limit is only 7200rpm and you will have a speed cut as well.

The ECU tune is (in my opinion) the most difficult part of the VE swap. To get it right that is.

As stated, the MAF and the ECU need to match.

Stock SR20VE ECU high cam activation should be 5900 rpm for the intake and 6150 rpm for the exhaust. Of course, none of this will mater unless the DE harness has been rewired to match the VVL outpin pins from the VE ECU. You said you are using a window switch, so this should be a mute point. Speed cut with the VE ECU will be 180 kmh or 112 mph.

Just curious why you didn't use the DE ECU? You can use the DE ECU with the VE 333cc injectors. It will run a little bit rich but that can be controlled with an adjustable FPR and bumping up the mechanical ignition timing.

Also, before you do any performance modifications, please make sure you have a wideband installed. Otherwise, you are just shooting in the dark.

I didnt think or read anywhere in the forums that you could just use the existing de ecu so i just assumed switching the ecu while doing the swap.

The only reason i am using the de maf atm is because the motor when shipped came with the ve maf but for the life of me i could not find the plug on the provided ve wiring harness for the maf, therefore i just used the de maf for the time being.

FYI - The stock DE ecu will work just fine if you run the DE MAF & injectors, and activate the cams with an external RPM switch. You'll obviously be leaving horsepower on the table until you get a JWT/Calum/Nismotronic. You can even drive it with no cam activation, and just use the small cam lobes.

C

Chris,

I did use the existing ve injectors, i didnt swap or change those at all

Read again. I'm saying the DE ecu will run the VE just fine with the DE maf and DE injectors. Just remember, match the MAF, and injectors to the ECU. Same with the water temp sensor, (the one that feeds the ecu, not the temp gauge sensor). The JDM one won't work properly with the DE ecu.

C