One thing I have learned over the years with aftermarket ecu's is that if it ran fine for a while, then started acting up...what makes that any different than when the car was stock and ran fine and later had problems. I wouldn't take my stock car back to the dealer and ask to have it retuned, I would ask to have it checked out. They would then diagnose the problem. Point is, the tunes don't change, if the car starts to run poorly, something is telling the computer lies (I.E. faulty sensor, bad injector...whatever).With a stock car...I don't think it would be possible to hurt anything unless your oblivious to abnormal things like heavy knocking or severe lack of power. I opted for all the sensors on the ProEFI...wideband, fuel pressure feedback, exhaust backpressure, and a can gage (soon to be configured). They setup all the safegaurds in the ProEFI, so if fuel pressure drops and the car goes lean for example... it will turn on a revlimiter to save the engine. The failsafes on this computer are UNBELIEVABLE! The only way I could see someone being able to damage their engine is to say...shift from 4th to 3rd (attempting to hit 5th) and overrevving the engine mechanically, which there is no way to prevent that with electronics. I feel perfectly content not being able to watch anything but air/fuel. There isn't alot of setup for the dealer to do on the ProEFI other than fuel and timing adjustments anyway, it has all been set up by ProEFI from the start.

 

Hey sounds like you have thought things through. I really like the fuel pressure feedback loop. Very nice. I want to add this on as well in the near future. I worry about the fuel pump going out or running low on fuel due to G forces during turns with a low tank.

 

My thoughts exactly! I have seen several guys running the twin pumps, and having just one fail.....very bad! I'm trying to be as prepared as I can be for the turbo move. I watched them take a Z with an adjustable regulator and a fuel pressure sensor wind the pressure up and down in it's full range and the air fuel only moved when the pressure was so high it hit the minimum on time for the injector and couldn't physically lower the injector pulse width any further....something like 700microseconds.....REALLY cool stuff!

 

Actually, this is not correct. Pro-EFI increased the rev limiter on a silver '06 G35 auto and is increasing the rev limit on mine to 8000 RPM! I will report once mine is increased next week and let you know how it went.

 

I was witness to this conversation!!

 

Please just confirm that this is being done with the 48 box and not the 128.
Thanks.

 

are 06 Auto's revup motors?

 

Nope

 

But revup or not, I believe the throttle controlled rev limiter applies to the 05 and up cars... (non fuel cut)

 

I believe Intense has an '06 350Z 6MT in there shop now with a Powerlab Turbo Kit and Pro-EFI, but I can't remember if they said they were adjusting the rev limiter on that one or not.

 

oh i thought it had to do with the rev up or non rev up.. but i you're right because i believe the 04.5 350z have this problem too.. and they are non-revup.. i remember romey's car had this issue

 

Hmmm, I have an 04.5 G35 coupe and it has the hard fuel cut rev limiter (no issue for any standalone fuel controller). Now I'm uncertain which vehicles have the soft limiter...

 

hey I have a quick question about the utec and figured i could put it in here rather than starting a new thread. I'm selling it and the guy is asking me if the tune was locked. You can't lock a tune on the utec right?

 

Yes, you can.

What kind of EMS are you going with now? Just bite the bullet and get a MoTeC

 

haha no I'm actually parting out my car and selling her

 

+1 I doubt PF do lock their Utec tune though..

 

You can start from scratch even if it is locked though if you want to unlock it (I presume this is going on another car with a different setup).

 

...wtf happend?

 

Woman

 

damm didn't think this would last that long thanks again