Thread: FX Cruiser owners
07-21-2006, 09:09 AM #1
FX Cruiser owners
I sold my RXP on Monday and picked an '04 FX Cruiser HO the next day and I think I wanna make some changes to it. Who has installed the Riva rpm kit on a FX HO? I am thinking of just adding the filter/velocity stacks and exhaust for now. What kind of gains should be expected?
I posted this in the for sale forums whoops, hopefully soomeone can get this moved to its proper place. sorry!
07-21-2006, 11:54 AM #2
- Join Date
- Apr 2006
- panama city beach 'fl
mick you just ask me that!
07-21-2006, 01:36 PM #3
I know chip..
I wanna see what other people are gettin from this kit.
07-21-2006, 01:42 PM #4
I moved the thread to the performance section
07-21-2006, 06:10 PM #5
- Join Date
- Jan 2006
Here is a post of mine previously (another forum) ...
With the RPM kit the engine rpms go higher ... somewhere around 250-300 rpm.
In my opinion its the free flow exhaust pipe that makes the most difference and allows this ...
I have had the trumpets, free flow air-filter, ride plate, PPK, Intake grate and sponsons on and the craft did not improve at all top speed ... with the stock prop still on and no free-flow exhaust. Hook up improved sure ... and handling but top speed was virtually the same.
In fact ... in smooth water the my wife's 06 Black FX (stock outta the crate) pulled away ever so slightly over a 1 mile race ...when it chopped up a bit I went passed because the pump stayed hooked up longer (Intake grate and PPK).
I have also tried a 14/20 Dynafly impeller (The RPM kit prop) in a stock craft (my 05 FX Cruiser) and it was a dog ... I lost 2mph off the topend and it was doughy off the line and in turns. A 13/20 Concord dropped .5 mph off the top only but was fantastic off the line and mid-range. This would be a good replacement prop for a stock craft if the Yammy original was too expensive. I'm not sure Solas have put the Concord 13/20 for the 155mm pump into production yet ?? I did get some cavitation burn on the 13/20 and stock prop after 45 and 75 hrs respectively mid blade ... Proper pump seal with marine sealant when installing PPK might solve this ...???
I think there are two ways to go ....
1. Fit the whole RPM kit as a package ... Yummo !!
2. Fit it in stages if you like but in this order IMO ...
a. Ride plate
c. Free flow air filter
d. Intake grate and PPK ( must be done together)
e. Free flow exhaust
07-22-2006, 01:09 PM #6
07-22-2006, 03:55 PM #7
i have fitted the parts you are thinking of fitting
and the ski definatly performs beter
the one thing i would say though is it needs the prop to realy make it work
i ride with 2 15f's both with mods and a msx140 with mods
in top end runs the 15f's were able to slowly walk away one more than the other and i would stay with or creep away from the msx
after adding the free flow filter ,exhaust and trumpets
the i am able to keep up with one of the 15f's , the other is an 06 and seems to be a good one because after a few mods he is now able to walk away from all of us
these runs are at any time of our ride full tanks or near empty
we have also raced for more that 10 k's all staying neck and neck
previously i would have slowly droped back
i will fit the prop soon and then we will see how the 15 that gets away goes
ps the mods to the 15f's include ride plates,grates,impellers,free flow exhausts and freeflow intake
the 15 that is fastest also has had the pump machined round(they are not that good from the factory)and the impeller machined for a very tight clearance(3 thou)
08-24-2006, 07:54 AM #8
have a friend in fort walton with the full kit, his GPS numbers are betwen 64.5-65.5
He likes it a lot,
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