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  1. Pro-pulsion

    Why a Heavy Flywheel Yields More Top Speed

    Also the heavier flywheel helps to absorb vibration and resist shockloading when the impeller catches air at full throttle and then reloads instantly with water :)
  2. Pro-pulsion

    How important is foam density?

    I did the math on it years ago when I used pool noodles and I think it came out to needing 37 feet of pool noodles to maintain positive buoyancy for a 350 lb ski. I couldn't stuff that much into it but I know I was really close. It might be in my build thread too about the math part. I took the...
  3. Pro-pulsion

    650sx rebuild and restoration.

    I I see 2 :) one facing the wrong direction and the other running around without a tailgate :) You see, tailgates prevent things from flying out if they're going to be left loose in the back, but also, tailgates are part of the box structure and help keep it all together. If you've ever seen a...
  4. Pro-pulsion

    How important is foam density?

    This build thread shows how I setup siphon bilges in the tray area because I'm fairly confident that eventually water is going to start getting in there again. I've had my share of drain plugs and ball valves, water always eventually found its way in around them. A fully sealed tray area with...
  5. Pro-pulsion

    How important is foam density?

    I used Styrofoam Highload 100 for my tray refoaming because it has the highest compressive strength of their line at 100 psi. After doing a lot of research on it, this ended up being the best option for the purpose. It's also used as a sublayer under the tarmac at airports. I have been through...
  6. Pro-pulsion

    Strange issue - black transfers only on front cylinder

    I'm with bkspeedwerx on crank phase. Don't go with just a visual appearance, it only takes a few degrees of delayed timing to send a flame front down the transfer ports. Advanced phase yes, you are correct and detonation will occur melting a hole in the piston. But without a spark plug hole...
  7. Pro-pulsion

    Kawasaki 650sx and impellers

    I put a Skat 10/18 on my old sx and loved it, it was meant for the 650 though so no modding needed. There's a lot of improvements that can be done on the old sx, many are free mods too that just add to the fun of them. After I went nuts on mine, a couple of friends had a stock one that we did...
  8. Pro-pulsion

    SuperJet - R&D Afterburner Pump Stuffer

    R&D...Rare and Dangerous...to the competition :cool:
  9. Pro-pulsion

    Lets talk starters

    Inside the end for the power cable posts will be the brushes. It's a good bit of fun getting them back in once you've opened it up and are reassembling. But the noise is one of two things, either the bearing(s), can't remember if there's one on the brush side, or the starter bendix. If the...
  10. Pro-pulsion

    SuperJet - R&D Afterburner Pump Stuffer

    Toppin up, good performance gain for y'all in need of the next closest thing to a mag pump and at a fraction of the cost :)
  11. Pro-pulsion

    SuperJet - R&D Afterburner Pump Stuffer

    Haha, yup, totally lol
  12. Pro-pulsion

    SuperJet - R&D Afterburner Pump Stuffer

    Cause I'm about to ruin...
  13. Pro-pulsion

    SuperJet - R&D Afterburner Pump Stuffer

    Pump up your jam, pump it up while you're stuffin'.... :D
  14. Pro-pulsion

    Jetworks water restrictor

    Me thinks you don't want to restrict water to the headpipe. I have read that if tuning a B-pipe, you actually would do better increasing water pressure to the headpipe and restricting water injection volume by as much as needed for your setup to really make use of the water injection benefits...
  15. Pro-pulsion

    SuperJet - R&D Afterburner Pump Stuffer

    The Pumpty Dance, here's your chance, to stuff your pump...do it babay! :D
  16. Pro-pulsion

    Other Hot Water, the movie.

    I bought the Blu-ray for a rather stupid price just to show my support and hope they produce more movies. I like a good ski flick and one with a story line is impressive to say the least. Heck even a new version of All My Crazy Friends would be awesome!
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