Thread: I need 50 more RPMS!
07-21-2007, 04:25 PM #1
I need 50 more RPMS!
I just went out and tested my newly done (BY IMPROS) 14/20 repitched to 15/25. (I did not take my GPS looking at Rpms no speed).
The lake was tore up with tubes and boaters, and is a small lake. I hit 7030 rpms before running out of lake. tough getting threw all the wakes... The hole shot is real hard. I have to lean over the bars, and trim all the way up. then trim back soon as I start to roll.
Bottom line. I need 50 more rpms. I am thinking indexing the plugs. and plugging the hole in the bottom of the seat, to see if I can generate some air psi? I am at 160 psi, does an one think higher octane (i am running 93 now) would help? may be some hull trimming ? any thoughts on this?
07-21-2007, 04:32 PM #2
What nozzle are you running now? The 87 is worth 60 over the 85.
07-21-2007, 04:39 PM #3
That was (is) a thought Duke. I just don't have one hanging in the garage... I am going out with RXP'N im Mich tomarrow.. to some testing water. I will know more then..
07-23-2007, 06:33 AM #4
Well heat soaked she runs out 77 + mph but only at 6960 rpms so I guess it is back in the box. I guess I must of had that impeller really screwed up. But at least now Dave knows where it is. and how to tweek it in.
07-23-2007, 07:21 AM #5
Great lakes GPR:
Where are you located send me an address PM. I have a nozzel you can borrow if you want to pay the shipping to try it out.
Last edited by injected2stroke; 07-23-2007 at 07:25 AM.
07-26-2007, 10:13 AM #6
Let me know when you know it's here, and rather than paying additional to get it back fast via shipping, I'll do it the day it gets here and turn it around to you.
So, you need 120 rpm over what the 15/25 is turning right?
07-26-2007, 10:54 AM #7
07-26-2007, 02:45 PM #8
07-26-2007, 06:36 PM #9
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