06-24-2010, 04:51 PM #1
help me decide on impeller...info inside...
heres what i have
04 RXP 160 hrs bone stock
I have ordered riva metal clutch washers and mcmaster spring washers and shims. SC has 40 hours since last OEM rebuild.
opas block offs
riva stg 1 air intake or i can make a 4 inch system...
Home made free flow exhaust.
riva stg 2 SC wheel not sure its a gen1 or 2 (not sure when it was purchased new)
reverse bucket trimed
rideplate holes filled
impeller choices purchsed the 14/19 and 15/20 used
have Brand new OEM impeller = deff not usings it
stg 2 15/20
It stills has the OEM intake grate and doesnt have a pump wedge....yet....
guess the question is do i run the stg1 prop with the 3in intake and leave out the sc wheel? = guessing 8100 rpms
put wheel in and run 3 in intake with the 14/19 guessing rev limiter.
run the stg2 sc wheel with 3 in intake and stg 2 prop? = guessing low rpms. 7800-7850
Or make a 4 in intake stg 2 wheel and 15/20.... guessing this will still be low on rpms 7900-7950
riding on the ohio river in cincinnati oh... around 500 above sea level...
also i have no clue what rpms i was at prior because i never rode it on the cermic washers
what are your guys thoughts???? also im guessing on the rpms above judgeing off what others have noted
06-24-2010, 05:33 PM #2
Run the 14/19 with the 4 inch air intake and gen 2 Scer wheel..Tweek the prop to get your optimal RPMs..15/20 is gonna be to much to turn without an externa ICer..You will be able to turn it but your performance willl be shit..
06-24-2010, 05:47 PM #3
agreed.... with my mods im spinning a untouched 14/19 at 8150... now that i have a intercooler and injectors i am upgrading to a 15/20... until the i/c and 42lb injectors i didnt have the power to spin a 15/20
06-24-2010, 06:04 PM #4
so 4in air 14/19 and stg 2 wheel. any idea of what speeds or rpm i should see with the 14/19 untouched???
06-25-2010, 07:58 AM #5
06-25-2010, 08:38 AM #6
06-25-2010, 11:27 AM #7
My wifes ski was running solid 73 MPH with that exact setup
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