Compression

sparky · Sep 26, 2009

What should the compression be for a 2004 600 REV?
How to check properly throttle wide open or closed?
Warm or cold?
Any info would be appreciated
8000 ft elevationn

summit800 · Sep 26, 2009

depends on elevation, 120-130 (800)

evandaigneault · Sep 26, 2009

check with the engine COLD

skidoojames151 · Sep 27, 2009

if u want the actual running compression you check when warm

sparky · Sep 29, 2009

Van Epps · Jan 12, 2010

same question for an 04 800 at 2200' elevation. I have 125 mag side / 134 pto side. Is this ok or low compression?

BeeDoo · Jan 13, 2010

A lot depends on the compression guage. You definitely want to be over 115 on both sides, but perhaps more importantly, each side should be within about 8 PSI of each other. If one is significantly lower, you have a problem.

aktrucker · Jan 13, 2010

Van Epps said:
same question for an 04 800 at 2200' elevation. I have 125 mag side / 134 pto side. Is this ok or low compression?

I would say it's time for rings....How many miles???

Van Epps · Jan 13, 2010

600 miles on the Wiseco's at most ...

Mac-Daddy-Racing-212 · Jan 18, 2010

I have a 04 800, it has 145 and 148 on a warm motor. SPI pistons with over 3000 miles on them. I've had no problems with the SPI's. Total of 7000 miles on the sled. Sled is used from 900 to 2500 feet.

Van Epps · Jan 18, 2010

How much does overheating these motors affect the life of the rings?

Tackbtch · Jan 19, 2010

04 800

Sorry I cant answer for the 600 however, my 04 800 with double ring pistons, stock head, has 155 both sides. Cold eng, three pulls with the throttle wide open. Engine has about 300 miles on this setup. Sled had 135 pto, and 128 mag, with the single chrome ring doo piston with 2000 miles on the rings and 3700 miles on the pistons. Elevation is 2200 feet, Hope this helps, Dino

KFD070 · Jan 19, 2010

Thanks for this post. I tested my 04 800 the other day and got 120 cold on both sides. Throttle wide open. I thought that a was a bit low? Seems to run fine with about 2400kms or 1400 miles. :beer;

Van Epps · Jan 19, 2010

Tackbtch said:
Sorry I cant answer for the 600 however, my 04 800 with double ring pistons, stock head, has 155 both sides. Cold eng, three pulls with the throttle wide open. Engine has about 300 miles on this setup. Sled had 135 pto, and 128 mag, with the single chrome ring doo piston with 2000 miles on the rings and 3700 miles on the pistons. Elevation is 2200 feet, Hope this helps, Dino

Great info, Thanks Dino, especially since we both are at 2200'. I have a couple questions for you:

1. What brand piston are you running now?
2. Was there a noticeable difference in power with new pistons/higher compression?

J

Tackbtch · Jan 19, 2010

Van Epps said:
Great info, Thanks Dino, especially since we both are at 2200'. I have a couple questions for you:

1. What brand piston are you running now?
2. Was there a noticeable difference in power with new pistons/higher compression?

J

MCB, Duel ring. Didnt feel like more power but No power fade on multiple climbs up the hills, and starts way easyer.

Dino

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Compression

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