Thread: 05 pump worth it?
05-01-2009, 08:11 AM #1
05 pump worth it?
I have a friend with an 04 gp1300r RRE, (basically a level 1) . In addition to that he has installed an 800 grate, had the head machined and angled the ride plate. Currently running 70/71 mph at 7110, 82 F weather, 65F water. Any opinion on the 05 pump upgrade. Looking to gain top speed. What can he expect from the 05 pump w/ the dynafly 14/20. Looking for some advice before dropping $600 plus $$$.
05-01-2009, 08:18 AM #2
I think the pump and prop is like 1 to 1.5 mph faster.
A used ff plate from Jim would gain around 4 mph and be alot less
05-01-2009, 09:43 AM #3
Thanks mtrager. That's quite a gain. The ski currently has a home angled Riva plate. I can't remember the exact angle off the top of my head. We'll have to check it again. I'm think it is close to .8 " Kept removing material from the bosses and on the pump and angled it until the gains stopped, (Kind of a backyard mod though). Looking back probablly should of went with the Jim's. I do suspect that there is more to be gained here. Mainly because it will run the same top speed with a passenger on the back. I think it's because even with the additional weight of the passenger the nose is up higher so it's a wash. Considered "Jim's plate", sure wish there was one we could borrow for testing before dropping the limited $$$ available.
05-01-2009, 09:43 AM #4
05-01-2009, 09:48 AM #5
05-01-2009, 11:48 AM #6
05-01-2009, 12:59 PM #7
05-01-2009, 01:12 PM #8
I do not know what kind of angle he had until he replied .8.
Either way 71 is not fast with his mods. $600 with a prop is a lot to pay for 1.5 miles per hour. He also stated he was looking for top speed only.
I would get a good plate used, or have yours worked by someone, keyway, sonic booms and spend less and have
a 76 mile per hour ski on old pump.
Then when your ready for more do the pump/porting.
I might even be stretching an 05 pump at 1.5mph gain.
05-01-2009, 01:14 PM #9
05-01-2009, 01:46 PM #10
Just yanking your chain, Mark.
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