Thread: Tuning Pays Off
08-02-2007, 06:43 PM #1
Tuning Pays Off
I finally have some new numbers to post. After getting advice from Ross on how to set my R&D EFI controller and spending the last three weeks under the ski, I found another 3 mph and over 100rpm. I have tried over 20 combinations adjusting my ride plate, pump shoe, intake grate and nozzle.
This run was on a 97 degree day with humidity running almost the same (gotta love Florida summers). Half a tank of gas and sitting on the seat. Chop was light (for the St. John's anyway).
I currently have:
04 GP1300R Single Pipe NonPorted
Carl's mod-4 ride plate, 14/20 DF and 05 pump.
150psi stock head from Jim
R&D EFI Controller and F/A
800 grate (modified)
No tabs and a modified hull
Free flow (I know I lose about 1mph but the sound is nice)
Next is a trip down to Tampa to see Jim (key way) and Ross (Sonic Boom's).
The guys here who say spend the time tuning are right on - it takes some work, but I'm giving myself the 1/10mph to say I hit 75!!
Gotta say thanks to Carl, Jim, Tommy, Ross and WFO - you guys have been a big help
08-02-2007, 06:46 PM #2
Congrats man, nice looking ski. my goal is unported 75 mph but I'm not there yet.... 74.8 is my highest # and I'm down around 73 max now. keep up the good work, these guys helped you but you did all the work.
08-02-2007, 07:14 PM #3
Good job Gator, and the tuning is so much fun!! Would be great to see you show up here for our next race date...Would love to see that paint job up close also.. Ross
08-02-2007, 07:27 PM #4
I am also trying to do 75 or higher with out porting. I am currently at just over 72 mph with a 1200 grate and now tabs. I put on a 800 grate and I was up almost to 73 mph with out even messing with my setup.
I don't even have sonic booms, a milled head, or a key way yet And I am running at 1200+ feet above sea level.
08-02-2007, 07:31 PM #5
Good numbers, and that is a fine looking GPR .
08-02-2007, 07:41 PM #6
- Join Date
- Jul 2006
Great #s gator!! They will only get better as the weather cools off.
08-02-2007, 08:29 PM #7
Thanks guys. Without the help of this forum, and the people who hang out here - I would have just another stock ski. I've finally started to understand a litte of how to setup and tune a GPR. Some nights I wonder if I've gone too crazy with this. Most people I work with talk about grabbing some dinner afrter work, or watching some show on TV. Me, I'm thinking about getting home and adding another shim here or there!! It's kind of funny, the casual riders I work with don't want to ride together anymore - they just don't understand that I'll back in a minute - i"ve got to get the ski up on the trailer for more tweaking.
08-02-2007, 08:49 PM #8
Keep up the hard work gator, That is one awesome looking ski.
08-02-2007, 08:50 PM #9
good numbers cant wait to see you run it over here at tampa there is about 10 non ported 1300s running back there some good comp for you. keep up the good work.. alittle a little there really add up
08-02-2007, 09:04 PM #10
- Join Date
- Jul 2006
I just looked at your rpms again. If your turning that prop in 97* weather with high humidity you can go up at least 1 on the pitch and gain another mph right there.
Or go 2 and get your reeds or keyway. Or both.
Last edited by porksword; 08-02-2007 at 09:07 PM.
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