Rb20det low difference in compression test

[Harleyc93r32]

Rb20det low difference in compression test

Hi guys 

did compression test on my stock rb20det r32 and came back with 

1.150 2.150 3.120 4.150 5.150 6.150 

are these okay results? Or am I looking at a rebuild soon? 

32 has turbosmart boost T running 16psi only had on for a week but considering going back to stock boost and not using boost T. 

Car feels great to drive and made 155kw atw on 14psi and 430nmt 

[KiwiRS4T]

120 is a cause for concern. RBs will go well on 5 cylinders but who knows for how long...

Maybe repeat the compression test with a warm engine and pump a little oil in the dodgy cylinder to confirm that it is the piston/rings rather than the valves.

Yes reduce the boost back to stock and start saving for a new engine!

[Hadouken]

Do the test with a hot motor. Result?

I'd thrash it till it lets go.