Tip of the day: Transom plate sealing and truing

[mcederna]

Anyone in Miami want to do mines. Hey jim wanna do mines when you cut my plate.

[WP3223]

I finished up all the blue printing on my grate & transom plate on my SHO & was getting a nasty buck at ~69mph on every run. I've run the same angle on Jim's R&D plate(shimmed .095 on the rear) with the same prop I had on today & could easily run 73+ before opening up the shoe section of the Riva grate to mate properly with the TP. It's definately stuffing more water now. I did the testing on a stock ECU, & since I was bumping the limiter the last time out with this setup with a 83mm ring I had the 82 in this time. My rpm was 7600 with a true 155 YS-DF 15/22 which has way more root angle than the Riva DF, so I was kind of surprised to get a buck with this prop. Hopefully the fix is simple...more rpm & a bigger nozzle ring. I'm going to try it tomorrow with my R2 ECU & 85 ring.

The SHO doesn't buck & hook violently like a GPR when it overstuffs, but if your not prepared for it you can still get hurt. Just a warning for anyone wanting to try this mod on a SHO with stock ECU.

Has anyone successfully opened up/bored a 2012+ FX SHO/SVHO transom to 160 yet? With the huge tunnel and 87 nozzle it does seem like a good move - But definitely not worth a STUFF!

[sv650k4]

Has anyone successfully opened up/bored a 2012+ FX SHO/SVHO transom to 160 yet? With the huge tunnel and 87 nozzle it does seem like a good move - But definitely not worth a STUFF!

bump for a great unanswered question

[sv650k4]

well i open up my sho my pump set up is riva grate used the flap disk to open it up to match my 158mm pump and i have a lucky 13 cone with pump wedge. This setup works great with no overstuff.

[Green Hulk]

well i open up my sho my pump set up is riva grate used the flap disk to open it up to match my 158mm pump and i have a lucky 13 cone with pump wedge. This setup works great with no overstuff.

Awesome! Nice work!