Fix_Until_Broke
Top Post Dawg
I don't disagree that this is causing more stress on the engine internals.
Hopefully the PD150 pistons, ceramic coating and R520's will keep the pistons alive compared to the stock ALH ones with PP502's that I broke (which was up at 2000 RPM's and I believe due to the bowl edge melting from long injection duration). Rod bearings were "tired" for sure when I took them out at 170k miles but no damage to crank or rods.
A couple observations from this...or myths to dispel I guess
1) "The 17/22 will surge at high boost/low RPM" - there's a little flutter of the boost gauge at 20+ psi at 1600 RPM, but no sounds of surge or dropping out. Likely normal intake pulses.
2) "The 17/22 hotside is too small and restrictive" - most of the time exhaust pressures are below intake pressures. Now this isn't the case at 4000+ RPM's, but that's not where I drive.
3) "The OEM SMIC is crap" - IAT's were never more than 20F over ambient
I'm sure that there are better performing turbos out there all around, just showing what is possible with this popular turbo, or more specifically, the turbo is not the limiting factor.
Hopefully the PD150 pistons, ceramic coating and R520's will keep the pistons alive compared to the stock ALH ones with PP502's that I broke (which was up at 2000 RPM's and I believe due to the bowl edge melting from long injection duration). Rod bearings were "tired" for sure when I took them out at 170k miles but no damage to crank or rods.
A couple observations from this...or myths to dispel I guess
1) "The 17/22 will surge at high boost/low RPM" - there's a little flutter of the boost gauge at 20+ psi at 1600 RPM, but no sounds of surge or dropping out. Likely normal intake pulses.
2) "The 17/22 hotside is too small and restrictive" - most of the time exhaust pressures are below intake pressures. Now this isn't the case at 4000+ RPM's, but that's not where I drive.
3) "The OEM SMIC is crap" - IAT's were never more than 20F over ambient
I'm sure that there are better performing turbos out there all around, just showing what is possible with this popular turbo, or more specifically, the turbo is not the limiting factor.