water box

[naorav]

jerry you try the water box of rracing or made like snapper project beacuse i made the same like him
i take off the exhaust sensor like you said to get 8450rpm
i want to know if i buy the water box of rracing i dont have to take out the sensor

[Green Hulk]

I did the waterbox mod like snapper.

I haven't tried the racing waterbox. The racing waterbox is just a waterbox without the baffle. You still need to relocate the heat sensor as the waterbox evacuates so quickly.

If you are turning 8450 RPM's you need to put more pitch in your prop to get it to 8400. You are already on the limiter at 8450 and will start floating valves.

[naorav]

i try the 15/20 r and have 8150 then i try 14/19 r and have 8450 i try also big nozel 85mm the rpm was 8150 on the two impellers so i came back to the oreginal nozel 83mm and 14/19r speed 74.3 mh

[Green Hulk]

You can try taking some pitch out of the trailing edge on that 15/20 and your RPM's should come up and so will your speed.

[two2curupt]

I run a modified waterbox very similar to the racing waterbox...The waterbox has almost no performance improvement however it is shortened so you can remove the supercharger without having to remove any exhaust components..For a quick changeout..