First I'm sold on the UTEC. I will be purchasing the UTEC w/ the Tuner (Bosh) WB and Switch. I'm N/A currently and most likely for a good time I'll stay N/A. I live in Colorado where the elevation is 6000+ feet above sea level. The stock ECU makes adjustments when there are elevation changes. My question is; do I need to make adjustments using the UTEC when there are large elevation changes or will the tune I set at 6000 ft be safe at 200 ft?

 

Robert,

Good question many people have been asking us lately... Because the UTEC is setup as a piggy-back computer in NA applications the factory ECU will still compensate for the eleveation differences, so you will have very minimal if any tuning changes.

For Forced Induction applications with the optional map sensor, although I do not a lot of direct experience from sea-level to 6,000ft and back on a regular basis with the UTEC, I would imagine that if you have setup all of the load column properly you will again only have to make minimal (if any) tuning changes.

Hope this helps,

 

Thanks! Good info.

 

With NA, your factory ECU will compensate, and as Mike mentioned...no further tuning should be needed at sea level.

 

Thanks!!! This is good to know. Last thing I want to do is blow my motor.

Second Question: If I was to spend a good amoung of time (1+ month) at sea level should I set a sea level tune?
Third Question: If I set a tune for 91 octane and use 93 for one tank do I need to retune or will the ECU make adjustments like the elevation issue?

 

Hay Robert K, I live in Broomfiled,CO also. I have my Utec installed (G35), I used to have 255whp and 228TQ now 273whp and 235Tq (Dynojet). You can feel the different, but the problem is that I have code P1444 on, and I still don't know what it is (people who live in SL doesn’t have this code), my friend has 350z and he has the same code. Anyway, to answer you Question I haven't been to see level before with my car, but as I read before it should be fine to drive it over the sea level without making any changes.

 

GTT: Thanks man!!! Those are awesome gains!!! Can't wait to get my UTEC & Tune! Who did you're tune? Check out the SouthWest forum as we (Co) have get togethers all the time!

 

My friend Zak did the Tuning for me, but he is not here right now.

I will check the southwest, looking forward for meeting

 

If you have your car tuned for 91-octane and use 93-octane for one tank, you will not have to adjust any tuning. The car will run great.

If you have the map selector switch you could make a 93-octane map tune (probably can get away with another degree or so of timing).

However, if you have a highly tuned 93-octane map and go to a 91-octane tankful you may want to watch the knock count to make sure there isn't any knock.

Hope this helps,

 

Thanks Mike. I figured it wouldn't be that much of a difference. I do plan on having the following maps:
1) 91 octane mild tune/ daily driven tune aka better MPG tune
2) 91 octane agressive tune. For that last minute buddy call going to the track. LOL
3) 100 octane agressive tune
4) don't know
5) dead tune. So kinda like a kill switch.

 

Probably not necessary, but you could fill #4 slot with a 93-octane tune

 

Yeah... If I'm safe with useing the 91 I won't worry about a 93 octane tune. I do know that I can get my hands on some leaded 115 so I "might" do a 115 leaded tune. BTW: I have the APS race-pipes so no worry of ruining my cats.

 

We've tried some NA high octane C16 tuning, and the gains are negligable. I solid 93 octane tune is probably all you need.

 

Wow! Really? We'll I'll see what I can do. Its worth a try. LOL

 

Sharif: What are the largest N/A gains you've seen with the UTEC? I'm leaning/hopeing for 10-20 extra whp & tq. Also where have to been installing the Tuner wideband & Map Switch on the Z? Thanks!!!

 

It honestly depends on the state of your walk-in tune. If your ECU has a crappy tune, then the gains can be upwards of 20whp. But in most cases, the average gain is about 10-14whp. We mount the map switches, usualy, in the spare switch location on the arm rest. If you dont have that, we find other cute places to mount them.

 

You could install the map switch here. If you want I could write out the install. The harness length is perfect for this location.

 

Damn! Stole my idea! Its a great spot!

 

Nice I like that. If you could write a "How-To" would be great.

Also where are people installing there Tuner wideband's?

 

good thread.