I have no way to post other pics of the AFR -those were taken off the wideband we used while on the dyno. The overall AFR is MUCH more stable than the previous flashed ecu was. Just watching the wideband, there are no blips or sudden changes. We did have to spend a fair amount of time in this one zone from 5k-6k to get rid of a lean segment of AFR that occassionally would show knock on the log, but once we figured out what the car wanted, that zone got smaller and smaller and now its gone completely. That's the great thing about the UTEC...the datalogging feature is worth it's weight in gold

 

Adam
Would it be possible for you to take the front plate off the Nismo VTC pullys you have & see if they are the same as the OE pullys with just a little bit milled off the stops to allow the extra 10 or so deg of rotation in the advance direction ?
My guess is that the OE sprockets could be modified very simply.

 

Julian,

That is not exactly ture. My NA Z is still making peak power pretty close to the factory rev limiter around 6500 rpm. The rev limiter in the UTEC Software is set to 7200 rpm but we engage a soft limiter 250 rpms before the point you set. In my car you can feel the limiter engaging just before 7000 rpm as it should. Shift it at about 6700 to 6800 rpm should keep you on the power nicely.

The UTEC will only be as good as the person tuning it. The UTEC gives the Tuner all of the tools needed to make a powerful vehicle and safety tools to help keep the car as reliable as possible.

Thanks,

Jermaine@turboxs.com

 

Nathan - sorry I do not feel comfrotable disassembling them...would rather they remain intact. If you think you can modify the stockers, by all means, go for it. Given the relatively inexpensive nature of these pullies, I chose to not go that route (although I considered it briefly)

 

Adam,
This is how we recommend the use of the UTEC, but we have been running Jermaine's car based off the MAP sensor for the last 2 months. Speed density mapping works just as well on the NA car as it does on the FI cars and allows for some fantastic results. However, it's not for everyone, so customers should only use this if they or their tuner has the proper experience to pull it off.

With that out of the way, great results on your UTEC tune!
-Nathan

 

Interesting...I've never used MAP based tuning for an NA car (never tuned Honda's, which are the only cars I know that use that method). I'll have to try it out one day as I have the MAP sensors here

 

On an NA car just set your maximum value for mapping to 0psi. I think we typically set the minimum value to -5 or -7psi. Shoot Jermaine an email and ask him for the base-map and parameters if you are interested in trying it.

-Nathan

 

i am a former honda guy. doing the mapping method on NA would be just like the Hondata Kpro ecu correct? That has been extremely effective for bolt on and cam'd rsx's

 

I read the whole post and I dont think this question was asked. Do you guys think that the ECU reflash helped the Utec or will the Utec yield the same results with out a reflash?

 

the flash has nothing to do with the UTEC - the UTEC takes over your fuel and timing from a prescribed TPS point onward. The baseline dyno I posted was my flashed car...the after is the car once the UTEC was tuned...dramatic difference

 

Is the Utec able to control the rev limiter?

 

^^^
Are you talking about having an ECU reflashed prior to tuning? I know some people who get a ECU TC relfash (which I'm against) and then get tuned via unichip or w/e their system comes with. Would this provide better results?

 

Yes as Iam sure Adam will verify... The ECU can still pull timing off the motor. Having the ECU reflashed will stop this b/c it flashes all three maps..

 

AH thats what I've been looking for. Finally a reason why reflashes are of use. So UTEC can't totally control timing at all times running open loop?

 

No a reflash is not necessary.

 

So your saying that the UTEC will keep the ECU from pulling timing from the motor?

 

the UTEC runs strictly the timing map you set it to run - it does not vary, like a stock ecu or even a flashed ecu does

 

That is what he is saying, reflash = useless...
The stock reflashed ECU has no say in the state of tune or mapping once a UTEC is installed..This is why it is as close to a standalone as you will see..

 

Let me ask this again,

Can the Utec be able to control the rev limiter?

 

So then then a reflash is pretty much obselete.......