Just put it in today. Really a great mod, my car pulls a lot better up until about 5k RPM's. I am looking forward to getting my MEVI next week so I can take advantage of the higher rev limiter. Who knows, with the new manifold I may be a contender for the fastest N/A I30.

 

no mil codes? have you checked for any codes that don't illuminate the mil?

 

do they program the ECU differently for use with the VI or do they leave it the same? Meaning, once the VI is activated it crams more air into the cylinder, does the stock ECU compensate and add more gas, will the JWT? I just installed my VI about a month ago and am getting it dyno'd in 3 weeks - I want to see if it's running lean after 5k. Did you buy it new?

 

Good questions I would like the answer to as well.

I thought the stock ECU had a fixed set of parameters for wide open throttle.

 

yea me too.

 

Get that sucker to the track.

 

It does have a fixed set of parameters, and those parameters run rich. The aftermarket ECUs both lean out the mixtures (and advance the timing) to make more power, but they are both said to be on the conservative side still, JWT's especially. I would have no worries about running to lean, but a few dyno runs with a wideband O2 sensor should put all those fears to rest.

 

Sorry i took so long to reply, but yes i checked the ECU and there were no codes thrown out (I was a little afriad since I was using a 96' Maxima ECU on my I30). This modification definitely has some nice gains on its own, but it seems like it was made to work with the Variable Intake manifold. Also it is kind of nice to know that I have the chance to have a ECU controlled nitrous kit if I want (although the possiblity for an NX kit is now out of the question).

 

this should not be a problem since in effect your are not adding more air or "boosting" but rather simulating shorter intake runners.