OM603 semi-super pump testing, fitted with Bosch 6.0mm elements
OM603 semi-super pump testing, fitted with Bosch 6.0mm elements
I got the 3.5L (350SDL) Garrett turbo installed and running. Boost gauge shows 15psi (1psi less than the ~16psi I saw on the workbench). Good news is, the boost doesn't vary even a little at high RPM, it stays pegged at 15 (the stock KKK would always drift down as RPM's increased). Bad news is, I need more boost. I don't think there's enough adjustment range for the stock wastegate so I may leave it as-is at 15psi and try an external boost controller. I'm looking for 20-22psi. Adjusting the rod with the turbo installed looks like a RPITA.
For grins, I clamped off the wastegate hose and went for a drive. Boost went over 25psi (saw ~27 peak) under heavy throttle, although I didn't give it full throttle or high RPM's - didn't want to risk damaging anything with the wastegate sealed shut. But at least there appears to be decent capacity with the 3.5L turbo. IAT's climbed rapidly to 200-250F under these conditions, btw. The bigger turbo doesn't spool as quick as the little KKK but I kind of expected that.
I think this setup will allow steady peak boost at 20-22psi, which is great. But until I get it dialed in, the question remains if the additional airflow will solve my low power problem at high RPM's. Stay tuned...
Brief update:
I got the 3.5L (350SDL) Garrett turbo installed and running. Boost gauge shows 15psi (1psi less than the ~16psi I saw on the workbench). Good news is, the boost doesn't vary even a little at high RPM, it stays pegged at 15 (the stock KKK would always drift down as RPM's increased). Bad news is, I need more boost. I don't think there's enough adjustment range for the stock wastegate so I may leave it as-is at 15psi and try an external boost controller. I'm looking for 20-22psi. Adjusting the rod with the turbo installed looks like a RPITA.
For grins, I clamped off the wastegate hose and went for a drive. Boost went over 25psi (saw ~27 peak) under heavy throttle, although I didn't give it full throttle or high RPM's - didn't want to risk damaging anything with the wastegate sealed shut. But at least there appears to be decent capacity with the 3.5L turbo. IAT's climbed rapidly to 200-250F under these conditions, btw. The bigger turbo doesn't spool as quick as the little KKK but I kind of expected that.
I think this setup will allow steady peak boost at 20-22psi, which is great. But until I get it dialed in, the question remains if the additional airflow will solve my low power problem at high RPM's. Stay tuned...
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