Sx viper compression?

S

Sxviperrules99

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Joined
Nov 11, 2013
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Atikokan, Ontario
Hey guys, the other day i was at a friends house and i decided top pull the plugs on my sled and check the compression. It had 110 on each outer side and 120 in the middle..... Is this normal for it?
Thanks,
Jake
 

I wouldn't say that it is normal...normally if you are running the stock head on the Viper the pto side is a bit lower than the other 2. This is because the combustion chamber of the head is larger on the pto side. Typically pto 110, mid 120, mag 120 or somewhere there about. Your numbers are a bit weird but not terrible, could be gauge.
 
Last edited:
2muchhp said:
I wouldn't say that it is normal...normally if you are running the stock head on the Viper the pto side is a bit lower than the other 2. This is because the combustion chamber of the head is larger on the pto side.
Click to expand...

X2, I would say PTO and center is a little on the low side but is fine...the 110 on MAG cylinder would raise my eye brow. Maybe get a peek at the top of piston threw the plug hole or pull manifold and look at the front of piston.
 
2muchhp said:
I wouldn't say that it is normal...normally if you are running the stock head on the Viper the pto side is a bit lower than the other 2. This is because the combustion chamber of the head is larger on the pto side. Typically pto 110, mid 120, mag 120 or somewhere there about. Your numbers are a bit weird but not terrible, could be gauge.
Click to expand...

OK, so should i just i just keep driving it or should i rebuild?? The sled only has 3000 miles on it.
 
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