Compression for '06 M7?

[Environmentalist]

What compression should I expect from my '06 M7? Just checked and it was 114 and 112.

Thanks!

 

[bluebear]

My 700's have been in the 135-145 lbs range but #'s will change depending on your compression tester and environmental conditions. Most will say as long as numbers aren't too low and they are within about 10% of each other you are good.

IMO 114-112 is a bit low but since they are close it could just be your tester?

Chris.

 

[knoba]

m7

Elevation makes a big difference at 6500ft my m7 is 120 on each cylinder.

 

[Ski-Laxn]

Mine at 5200' was 125.

 

[Environmentalist]

I'm at around 2200', so should I expect higher numbers or lower numbers with low elevation.

Thanks!

 

[bluebear]

Lower elevation should lead to higher numbers. I'm at a few hundred feet and should get higher compression numbers than someone with the same sled at a higher elevation.

Chris.

 

[sledtahoe]

6200

I also got around 120-122 at 6200 feet sled has 3500 miles on m7...both sides should be same or real close.

 

[Proven]

Environmentalist: At your elevation you should be around 125 lbs of compression to be good. Check you gauge or recheck compression with another gauge just to be safe. I also like to see both sides within a couple pounds of each other.

 

[Environmentalist]

Thanks guys! I will try another gauge to see if there is any variance. At least they are close to the same 114/116.

 

[fasta76]

Not sure if you did or not? But i was always told to hold the throttle wide open when you check it? And check a warm motor!! DOnt know if that will help?

 

[justindacey]

at 800' mine is at 135lbs

 

[sledhead699]

i checked mine a while ago and they were 98/90 and im at like 3500 feet. that was way to low for me because i have a high comp head also. so i put a new top end on and should be good now