7mech

Well last night the guys and I decided to go to a different city to try and find some different people to race. We went to a town about an hour south of us that is a little higher in altitude and was colder and more humid. When we got there we drove around for a while. After that I decided to see how the car would act in a different place. Unfortunately I was not pleased. When I went wot the car boosted to only 10psi and when it got to about 5k rpm it sputtered really bad and bogged down. I was like what the ****, so I gave it some time thinking that the computer needed to adjust. After about 1 1/2 hours I tried the car again and it seemed to do fine. Then I tried to race a friend with a civic hatch that has an ls-vtec engine in it. He pulled the **** out of me in second gear. Turns out that I was only boosting like 8psi in second gear. Normally my car will boost about 12psi where I live and will boost 1bar in Garland, TX (up by Dallas & lower altitude) where it was tuned. I've never experienced this. It also did the same thing when I got back to my town. Can anybody ad some insight to what is going on with my car? Is it just the computer adjusting? Does it ussually take awhile for it to adjust? Are there any problems that might cause this? I would appreciate any suggestions. Thanks.

7mech

bump^

j9fd3s

the e6k doesnt adjust, it looks at the maps and outputs from that. if you have problems like that its tuning, maybe of the air or coolant correction maps. i dunno why the location did anything, maybe different temps or humidity?

7mech

I figured it was the different location because I haven't left the city I live in and got on the car hard since it got tuned.

7mech

Well I talked to Chris Ott (he tuned my car) at Rotary Performance today and he said that the change in altitude is what caused the problem with my car. He said that when you increase the altitude without adjusting the computer for it the car will run really rich. The reason for this is because the air becomes thinner and the turbo becomes lazy. He basically said the you'll have to turn the boost controller up and the fuel down so that everything will run like it would where it was originally tuned for. Just so that you know, if you go down in altitude the car will run better. He said when you go down in altitude it's like giving the car a cold winters night worth of air. Hope this helps to explain this to anybody who ever runs into this problem.

pengaru

the ecu is supposed to correct for altitude, when you go to a different altitude it references a baro correction map and changes the fuel injection accordingly.



Check your setup and make sure barometric lock is not enabled, if it's locked it's not doing any dynamic correction, also make sure you have the internal baro sensor selected in the inputs page.



If it's all enabled and it is correcting, you need to go back to that altitude with yer laptop and tweak the baro correction map so the car runs right at that altitude. You should be able to select the bars between the altitude you will have just tuned and the altitude your car was originally tuned at and 'linearize' it, it will change the bars in between linearly between the two endpoints. This will give you a slightly better 'curve' until you have a chance to tune at more barometric points along it.