How much speed will a aftermarket impeller add??

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How much speed will a aftermarket impeller add??

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How much speed will a aftermarket impeller add?? - 1/9/2007 10:49:38 PM

Yamahabob

Posts: 1
Joined: 1/7/2007
From: Columbus Ohio
Status: offline

I am a newbe so im not sure if this is the right fourm.. so if not sorry. I bought a 2001 yamaha waverunner Xlt 1200 2 stroke in Aug 06. I live in Columbus,Ohio and had to put it up 4 the year! I was only able to get a top speed of 57 on a calm day I am addicted to the speed I want to out run the speed boats. so how much speed will i gain from a impeller exhaust computer chip what ever? My second qustion is what is the fast that a jet ski can go?? thanks alot for the help and I look forrward to getting to know the site and its members!!

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RE: How much speed will a aftermarket impeller add?? - 2/4/2008 9:06:35 PM

RDH

Posts: 5
Joined: 2/4/2008
Status: offline

well the impeller is set at a certain pitch to have the motor run in its optimum power range.. for your motor the 66v its 7250 rpm.. putting a new prop on will help your top end a little, but your holeshot will be horrible, but theres a chance of engine detonation due to the stress on the motor, and it not being able to hit its target rpm,s...

your first mods should be a ...pump plug kit, wave eater powervalve clips,intake grate, check the oil lines from the pump on the front of the engine case they fall off alot make sure there tight, a primer kit, and yes the chip it comes as a kit with the d-plate,,, it mimics the stock catalytic converter signal when the converter is removed to put a d-plate in,, the d-plate allows the use of regular oils and keeps under seat temps down...    those are the mandatory mods to keep the ski safe....

as for speed mods it all depends on how far your willing to go,,,,,   people hit 70-80 all the time, a handfull are in the 90's, and top speed to date is 103, its a hybrid gprxp   basically a gpr with a 4-tec motor in it, this particular boat had an rxp top deck and gpr bottom deck...

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(in reply to Yamahabob)

Post #: 2