Thread: from 76.4 to 78.2
07-24-2005, 10:59 PM #1
- Join Date
- Jun 2005
from 76.4 to 78.2
last time i posted #'s i was 76.4 i trueded the ride plate and also did waterbox mod like hulks but took of 7 inches of length,today 78.2 best run ,77's all day,but get this i did a couple of runs with out the seat and that thing just jumped to low 80 meaning we really have to find a way to cool down engine compartment, im runing rr ecu,rr i/c ,rivas vortech sc impeller,riva air filter ,waterbox mod , ride plate mod ,10;1 pistons,solas
14/19 no repitch,i also see that im hiting rev limiter 8450 8400 all the time
i think i should go for the 15/20 solas any sugestions and or venturi nozzle
maybe bring down some rpms and get more mph any sugestions?????????
07-24-2005, 11:20 PM #2
Do you have pics , or a description of your waterbox mod. I'm going to be doing this soon...
congrats on the #'s
I believe hulk added his venturi and gained a couple mph. I would go with a repitch first then add the venturi after determining the repitch consequences. but I'm not a mod pro.
I'm working on a mod, using a 4" atwood blower and cutting a 4" hole in the back of the ski under the grab bar. I'm going to put an outerwear water resistant pre-filter over it.
Right now I have the 4" blower hooked up and testing hose placement / temperature differences...
I have a 4" hole in the front (opposite side of the gas cap). I am using a water resistant prefilter on it and it works great. Dumped it quite a bit with no water in hull.
since I have the 4" hole for air intake to front, I hooked my air intake up to the front air intake in front of seat using pre-filter.
07-25-2005, 01:46 AM #3
07-25-2005, 09:12 AM #4
if you had a nozzle already.. a venturi... i would say put the nozzle on to bring the RPMS down just a hair.....
but since you don't have a nozzle, seems like a repitch would be cheaper than buying a nozzle.... take your pick either way... it'll take a few attempts at fine tuning probably.
07-25-2005, 11:14 AM #5
Great numbers Peter! Glad that ride plate mod helped out there!
CRS, what he means by trueing the rideplate is filling in the 6 bolts holes with filler and making sure the grate is level with the rideplate.
Here is a link showing pics of how i did this.
07-25-2005, 11:21 AM #6
Peter, Do you have some pics of your mod's? What did you do to your ride plate? I have about the same mod's as you and I was on the rev limiter @8450 rpms but know can't get over 8150 rpm's. Would like to see how you modified you hull with the 4" holes.
07-25-2005, 02:36 PM #7
10:1 pistons...is that the only internal engine mod? That's quite a difference, especially since it's a forced induction motor. What all was involved in that?
07-25-2005, 03:22 PM #8
Hmm, what is the rev limit on a rr ecu, sounds like its 8450 from what you guys sre saying. I ask because a buddy of mine is running one and claims he`s getting 8700 rpm with a 14/19 so is going for 15/20. I wonder if he`s playing with my head?
07-25-2005, 03:24 PM #9
It's 8500. He's not running 8700 unless he got an engine management system from Rotax which I don't think is even available to the public yet.
07-25-2005, 04:23 PM #10
Peter, what brand are those 10.1 pistons? I haven't heard of anyone running those yet. Where can they be purchased?
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