I will do some more looking at turbo related stuff next. Maybe more preload on the WG rod is in order. I am using a G valve boost controller. The turbo makes about 6-8 psi without.
It has been a while since I sold my old 740 sedan DD. But it had a t3/t04e 60 trim. I remember it building boost way faster too. I actually have a china made "50 trim" on the shelf I thought about using. It needs bearings now, but it spooled faster too. I originally was thinking it would be too much for an automatic car with low stall speed. But if this turbo is knackered, maybe I'll give it a try.
- Intake air temperature isn't shown here but I can pull it out of the datalogs. I haven't looked at it during boost much yet. The GM open element sensors are not typically very fast to respond. So a 3 second long pull isn't really enough to get an accurate temp measurement. They drift up and down as the intercooler heat soaks and cools, but its not really an instant measurement of the air coming into the intake. They lag behind the temp changes quite a bit. I used to think you could tune using that as an input and adjust timing with hotter high boost charge temps, but when you start looking at the sensor output in the datalogs, you realize it just isn't responding fast enough.
I have driven these cars enough to know that it should lay some rubber when the boost hits in 1st gear. And it doesn't do that
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Thanks for the ideas gents. Its good to have the community to bounce ideas off of.