Wiseman's 91 W126 OM606

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baldur

Fast

506

04-29-2020, 10:46 AM #15

(04-27-2020, 05:50 PM)atypicalguy
(04-17-2020, 03:43 AM)baldur
(04-12-2020, 11:30 PM)atypicalguy Yes his Chinese wastegate failed and he overboosted the motor to over 4 bars or something predictably fatal to the stock rods.

Anyone doing a high power build should just swap the pistons out to lower compression at the same time. Lower peak cyl pressures are also kinder to rods.

My experience is these engines need their 20+ compression or they will run like garbage, knocking and smoking.

What number did you take it down to Baldur?

I didn't reduce the compression of one on purpose, but if you bend a rod or for any other reason lose compression the symptoms are knocking and smoking at idle, but performance at higher rpm will still be OK.

Baldur Gislason

baldur

04-29-2020, 10:46 AM #15

(04-27-2020, 05:50 PM)atypicalguy
(04-17-2020, 03:43 AM)baldur
(04-12-2020, 11:30 PM)atypicalguy Yes his Chinese wastegate failed and he overboosted the motor to over 4 bars or something predictably fatal to the stock rods.

Anyone doing a high power build should just swap the pistons out to lower compression at the same time. Lower peak cyl pressures are also kinder to rods.

My experience is these engines need their 20+ compression or they will run like garbage, knocking and smoking.

What number did you take it down to Baldur?