96 f111 triple 600

[popcorn popper]

Im working on a f3 600 triple to rip around here. You guys remember what cranking compression should be? 120 ish? Im getting 110 on two and 105 on pto. Seems a smidgen low. Thanks Steve

 

[wildthangci]

Mines right around 135 across the board.
Yours sounds on the low side and that's a pretty good spread.

 

[slededjr]

130-140 is average on these.

 

[popcorn popper]

Thanks guys. Couldn't remember. Had one years ago all tuned with fast pipes. This one done up in s chassis very clean. Was playing with jetting and it has dial a jets was bouncing all over on egts so thinking compression down and its acting funky.

 

[Mach1]

Yep my favourite sled 135 140 and she is fast, radar at 107 mph out of the box

 

[popcorn popper]

So thats stock compression? This sled has between.065-.070 squish. Has wiseco pistons and 4 dot gasket. Cylinders look good. Looks like doo does not offer pistons anymore or base gaskets.

 

[Mach1]

Call mots machining in edm give him specs and will set you up, good luck

 

[slededjr]

Set of three piston kits on eBay for $110
comple wiseco top end kit, gaskets and three pistons for $349.

https://www.ebay.com/p/Wiseco-Top-End-Kit-Ski-doo-Formula-III-600-LT-1997-STD/1011872551

 

[popcorn popper]

Oh yes Tom. I found pistons and gaskets, not sure why this one so low. Pistons and cylinder looksgreat. Maybe never got a good seat. Will redo see where it goes. I hope that cures it.