Hey,

I'll be making the 1700 mile drive from Maryland up to Colorado this summer. OriginallyI thought it would be necessary to retune the UTEC because of the drastic increase in altitude and change in fuel octane levels (93 in MD, 91 in CO). But I just called this shop and they said it would not be necessary, because the ECU could adapt itself. I'll buy that for the altitude, but for octane levels? Is that just because there is a small difference between 91 and 93? I am a little concerned because I am already getting some knock in Maryland (I think due to high boost levels ~23 psi), and I do not want the effects to be exagerated once I get it up here. Thanks for the help- sorry if this is a stupid question.

Jon

 

Just turn the boost down to 20 once you hit Iowa and you're forced to drink 91 octane

 

Ru knocking on 91 ? is so going to 93 cant really help...... Car will be faster but knock as we know is not a good thing. Prolly need a retune seen people retune for 1 octane. GL man

 

Ya unfortunately I didn't have time to tinker with the boost much before I left for school and had to leave the car behind. Hopefully I'll be able to resolve the knock issue once I get back to MD and before the long trip, so the retune wouldnt be necessary for that. Plus it only happens in like 3rd gear when I'm really getting on it hard if I remember correctly. But I digress.

So I've got two differing opinions on this one already lol. I'm on the fence- I would LOVE to save the cash and not have to get it retuned until I add the IC pipes and new intake. But if it's really necessary I don't have a problem with it. Thanks guys.

 

i came from chicago to the mountains, went from 93 to 91 octane, and up to about 7200ft elevation and my car hasnt idled since i got here. I was also told the ecu would adjust

 

I'm in Cali and have 91 gas
per Turbox XS that's the reason I'm running Lean with the base map around 12.3 AFR
compare to the 11.1 people get with the 93 Octane

so basicly per Turboxs I'm running lean due to low octane
therefore please keep that in mind

https://www.evolutionm.net/forums/sh...d.php?t=122192

 

if you set to Map 0 and let ECU control everything instead of UTEC
you will be fine

 

Talk to Mac Autosport. They are familiar with tuning Utecs up here in CO.

http://www.macautosport.com

 

I was thinking I would do that too. Wouldn't that give me some pretty bad gas mileage though?

I just gave MAC a call (TOTALLY forgot about them ) and they said I do need to retune it. So I guess I'll plan on retuning it when I bring it up here.

Do you think I will have a hard time making the drive though? I guess I could try and stay out of boost, but that's hard to do on the highway. I could go to Map 0 but I felt like the gas mileage went down whnever I did that.

 

Just cruise and you should be fine, staties from IL to CO like to nick out of staters.

Turn boost down to 20 and you'll be fine.

 

I'll give that a shot- thanks for the heads up. Should be a fun lil road trip. Thanks for the help guys