Doing some wot pulls tonight, about 35* weather...

I'm tuned for 24psi.. And I am almost positive it use to hold 24psi to redline if not maybe it would drop down to 23.2 or something stupid.

Well tonight, did 50mph, 3rd gear pull.. Spikes 24psi instantly, which is great... But by 5800rpm it fell down to 18, then 17 and I'm almost positive it touched 16.. Then in 4th gear it was spiking 21lbs..

Now does this seem right to you guys? Is it the cold weather?

I'm going to Byt's dyno meet so I'll talk to him about it then, I want my car running prime for the dyno!

 

He might be able to get you to hold 1-2 psi more up top but fully bolted, it seems pretty close. I doubt you ever held 23.2 @ 6k stock turbo.

 

Really? So that's normal? I remember a 3rd gear pull would hold boost.. I could be mistaken though

 

The k04 runs out of breath in the high rpms, this is normal.

 

don't want your turbo to run out of breath up top and spool faster down low, without spending 4 figures for a turbo swap??


https://www.cobaltss.net/forums/2-0l...el-ko4-264753/

 

Hmmm I thought it held for awhil. Lol how bout a/f I'm at 12.9-13 at wot in 3rd. Lol maybe it's just me I just wanna be good for this dyno tomorrow.