BiodieselPower
New member
- Joined
- Oct 7, 2009
- Messages
- 113
What is your driving style?
Fairly hard street driving/racing. tow 5-10,000 pounds once a month. and i had the truck stuck in the snow the day before i noticed the last thrust going out and was working it pretty hard to get out.
I'll go with Turbo2332's suggestion, surge seems to be the most obvious killer.
Going by your pressure ratio figures I would also check the pressure lines to your gauges as it sounds like they could have been switched over inadvertently. Are you running name brand turbo's or using an aftermarket brand?
Gauges are right and not plugged. the truck is an 08 ford with edge CTS and im using the factory digital sensors.
They are all original Borg units bought from reputable sources.
What would wastegating do when the drive is ALWAYS lower than boost?i would still strongly advise running some kind of waste-gate in your system.
Pump is "supposed" to be pinned at 30 and i have an adjustable pump gear retarded all the way, so it should be 20. I will try to bump it up 10 degrees just to see what it does to DP and boost...probably something worth trying.What timing are you running, advancing timing will lower boost pressure. Your boost to drive pressure seems odd from what I've experienced running similar turbos.
I don't see that either my s400's have always needed the drive to be a little over boost typically 5 to 10 psi. My guess is the drive pressure is not reading accurately for some reason.
Is your compressor surging when you shift gears?
Like i said before i really dont think its the gauges, the old truck had mechanical gauges and the new one has the factory digital ones, both with similar readings.
I wouldnt really say it surges, but it does "bark" when it shifts.