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Did a compression test on the FXR just now and this is what I ended up with.
Front cylinder:
Rear cylinder:
Front was technically at 210 and rear at about 215 before I was able to snap a pic. After reading more about compression on Evos, I'm sure the S&S Super Stock heads and domed pistons that I believe are in there (haven't verified yet) are working their magic. Don't know what valves or springs are in there but that mild Crane cam seems to be pretty happy in there. What say the peanut gallery?
The Crane Fireball 310-2 intake close @ 37 clearly has the non stock compression squezzed, that bike will be a rocket down low, will fall off around 5600 but hold on. You have a lot of room if wanting a light bike cam, I would have a old school Mackie DM580 in a second but have a great platform with those numbers to expand.
The Crane Fireball 310-2 intake close @ 37 clearly has the non stock compression squezzed, that bike will be a rocket down low, will fall off around 5600 but hold on. You have a lot of room if wanting a light bike cam, I would have a old school Mackie DM580 in a second but have a great platform with those numbers to expand.
That's my only complaint if I had to look for one, it's a powerhouse down low but it falls off sooner than I'd like, the motor is rev happy so I end up higher in the revs than I realize. Otherwise I'm very happy with it but I know I can take better advantage of the available parts with a different cam.
Last edited by ThePaintPirate; Apr 16, 2022 at 04:57 PM.
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Compression Test Results
