Thread: Advice on an Impeller
02-20-2009, 10:50 AM #1
Advice on an Impeller
Well I have done some modification and it looks like I could benefit from a new impeller. This is what I have:
- Riva Air Flow
- Rotax Exhaust
- 42 Lb Injectors
- X Super Charger
- Riva Intake Grate ( If that makes a Difference )
Would I benefit from going to a 15 / 20 ??? Or could I repitch the 14 / 19 ???
02-20-2009, 10:59 AM #2
- Join Date
- Jul 2005
- Lake Dunlap, Texas
Could you give us a hint as to what boat you have???RXP--RXT. This would be helpful as to a prop and or pitch recommendation.
02-20-2009, 11:19 AM #3
Yeah, I guess that would help...
It is an 05 RXP..
Good looking out.
02-20-2009, 02:39 PM #4
- Join Date
- Aug 2006
- Gonzales, La
A regular 15/20r worked perfect on Cody's boat with the same mods. However, that's not to say you can't bend up your 14/19 to work.
02-20-2009, 03:32 PM #5
Save your money to spend on an XS Intercooler and repitch your 14/19.
02-20-2009, 05:40 PM #6
You are still going to need that 15/20 if you go to a XS ic. 14/19 and 15/20 have different root angles and you can't get a 14/19 to perform like a 15/20. It will work, but you may spin easier on holeshot and lose a little on top end with the 14/19.
02-20-2009, 07:44 PM #7
- Join Date
- Sep 2006
- winchester va
if u do a i/c u'll need a rrfpr with those 42's and either way go you'll need a 15/20 sell the 14/19
02-20-2009, 07:49 PM #8
02-20-2009, 08:10 PM #9
I thought you would need an rrfpr if you kept the stock injectors, but didn't need one if you went with the 42's
02-20-2009, 08:12 PM #10
By the way, did the X-charger make a big difference? It seems like you must be turning high rpm's with that 14/19. You have a lot of mods for that prop.
How many rpm's and how fast?
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