Thread: 06 RXP compression
01-12-2009, 10:32 PM #1
06 RXP compression
I used a new craftsman & a snap-on gauge but I only had the short reach adapter that is half the length of the spark plug threads. What is the normal psi difference from the long & short adapters? On these #'s what would my actual psi be?
snap on psi
01-12-2009, 11:33 PM #2
01-13-2009, 08:34 AM #3
Was the engine warm and the TB held wide open? It makes a slight difference... Ron
01-13-2009, 08:38 AM #4
01-13-2009, 08:52 AM #5
Jim, you need to warm the ski up slightly, but your numbers seam perfect.
The short adapter is not gonna make a difference at all. your numbers are on par with my 04. Just slighly lower, but when you warm the ski up they will rise just a bit.
01-13-2009, 09:29 AM #6
The short one will read slightly lower because it is taking up less space in the combustion chamber.
01-13-2009, 09:29 AM #7
- Join Date
- Jul 2005
- Lake Dunlap, Texas
To obtain ACCURATE compression readings a internal combustion engine MUST be at designed operating temperature --not just 'warmed up."
01-13-2009, 09:48 AM #8
01-13-2009, 10:07 AM #9
My ski was warmed up to operating temp.
01-13-2009, 12:35 PM #10
The GSX warmed up I got:
. snap-on Long adapter psi
. snap-on short adapter psi
So it's about 4-5 psi in difference that means my snap on #'s "COLD" are
For a comparison vs Snap-On:
The crafstman long adapter psi
short adapter psi
So the craftsman is consitantly 2-3 psi higher than the snap-on. Interesting. Which is the real deal?
Could this be because of the shorter hose on the craftsman?
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