https://spreadsheets.google.com/ccc?...FanpSeFE&hl=en


tell me what you think.

I've tuned a lot of cars but am just starting to learn about Cobalts.
This was to be a baseline to see what direction to take the car.

 

well, yer IAT2 are through the roof, Need cooling mods bad. and the injectors hate your life above 6500 rpms. I'm seeing a few cells of 7400 rpms. unless you hit the rev limiter hard, that shouldnt happen on a gm tune. It's pig rich, typical gm s2.

Proof of how jacked up the GM stage tune is.

*edit* Make sure the heat exchanger pump is circulating the coolant. 150+ is rediculous for a stage 2 pulley.

 

The guy just had his heat exchanger pump replaced less than a week ago.

Does GM really distribute a tune that asks for IDCs above 100% !?

 

Are the IDC's a tuning issue? or are the injectors to small?

 

According to the owner, those are the injectors that come with the GM stage 2 kit.

 

42#ers? Do you remember what color they were at the signal plug? And yes, that is one hot ass intake temperature... You sure that thing has fluid in it? haha

 

that looks like basically an untouched stage 2 tune.
Yes, GM really does command more than 20msec of their 42# injectors. The injectors are not too small, the tune is just too rich. the injectors would run much lower PW if the actual AFR was in the mid 11s instead of 10. I had similar numbers when i was on stg 2.

If his pump was replaced a week ago, he may have air in the coolant lines. I just dont think its natural to have that high of iat2 after a 3rd gear pull. If ambient temps were 81 like the chart displays, thats a 70* jump over ambient. 20* to 40* over ambient is the normal range.

 

Log was today.
Ur in ohio just like me, you know how the weather was today.

Now its thunderstorming.

 

What are you using to log that data ? ? ? I WANT

 

HP Tuners.

I clean the logs up for the final spreadsheet.
I've been doin this along time, kinda have a routine.

 

That is kind of what I had figured!