Thread: help with free flow exhaust
05-01-2010, 08:44 PM #1
help with free flow exhaust
I'm getting ready to install the Riva FF exhaust kit on my 15F. There look to be two sets of installation instructions. One seems to just bypass the secondary muffler while the other seems a little more complicated which also modifies the primary muffler. Can anyone tell me what additional benefits there are from the more complicated installation. Also, this one seems to include some type of bypass outlet at the rear of the ski...can you tell me what this does and why it isn't used in the more simple set up?
Any help would be greatly appeciated
05-01-2010, 08:52 PM #2
The waterbox mod allows more air to flow. It defetes the purpose to do the FF without it. You only have a small hole in the WB so it opens it up alot and the pictures show in the instructions
05-01-2010, 09:02 PM #3
Did you get any performance gain from the FF exhaust? I have the power filter which did help a bit but hoping to get more with the addition of the exhaust.
05-01-2010, 09:31 PM #4
05-02-2010, 12:30 PM #5
Did you do the mod by the riva instillation or did you make the hole bigger?
05-02-2010, 02:42 PM #6
05-03-2010, 08:44 AM #7
Did you cut the baffling out of the primary waterbox? If so, do you know if this was just for sound or whether it provides some performance gain
05-03-2010, 10:28 AM #8
- Join Date
- Mar 2008
I'm just guessing the reason why they didn't cut the baffle completely out is to maintain some intergrity to the muffler and keep some of the back pressure. I was thinking about deleting the water boxes, aka mufflers all together but after talking with some folks here and at riva i decided against it.
05-03-2010, 08:12 PM #9
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