190E 3.0-12v Turbo - PeachParts Mercedes-Benz Forum

RBYCC · #11 05-22-2009, 08:31 AM

Quote:

Originally Posted by Joreto

If that's the case, I'll leave the pistons alone . Turbo E320, I seen that pic of the modified head but come to think of it, since I'll be running less then 1 bar ( 14.5 psi) of boost (0.5 daily and maybe 0.8 - 0.9 at the strip ) I wondering if there is a need to modify anything at all. Maybe just smooth out the inward edge since sharp edges help detonation .

If you are still stock at 9.2:1 then you need not reduce your compression....just maintain a rich enough AFR under boost to prevent detonation.

Keep in mind you are not constantly under boost...
I can drive all day and as long as I don't rapidly increase my throttle opening I stay in vacuum to atmosphere on the gauge.

I've raised my boost to about .68 bar with no problem.
The install is about two years old with initial boost at .42 bar and slowly working up via the MBC.
About 6000 miles on the turbos and running stronger and stronger.

Ed A.