Thread: Which Vtech tune to use
07-11-2013, 11:14 PM #1
Which Vtech tune to use
2010 RXTX 260, Air intake, Free flow exhaust, RRFPR, Intake manifold mod, stock x-charger, vtech 8375
Just picked up some valvesprings and VT1100 injectors and want the rev limit at 8650
Looking at the tune list that vtech provides now there are 2 tunes for VT1100's at 8650 and I am not sure which one to use?
VT1100 8650 165 36 39 AGR 102
VT1100 8650 169 36 38 AGR 101
I think its the first one and the second is for the larger charger but need to know for sure, I e-mailed vtech but they havent given me an answer yet and am ready to hit the water...
Any help would be great!
07-12-2013, 04:10 AM #2
07-12-2013, 06:43 AM #3
RRFPR is always a good insurance policy. personally i dont need one because i have a CMD + Autotune but since you have one already might as well use it.
07-12-2013, 07:40 AM #4
U will need a fuel reg ... 2 of the 3 skis i did needed to increase fuel pressure ...
The Agr 102 tune is for the latter RXTX ...
With the 2010 RXTX u can still switch from normal and sports ...
Sports gives u even more sensitive throttle response ...
I have only seen this on the 2010 ECU ...
Switch between both to see if it makes a diff ...
I am running 8650 agr 101 with the baby ET 127 wheel at 8500 rpm best 76.6 mph and 87 nozzle ...
07-12-2013, 08:11 AM #5
- Join Date
- Aug 2011
If the vtech tunes are anything like mine were you will need a cmd, rrfpr begi setup, motec, Athena, or different ecu.... Like boost said good luck getting responses.
07-12-2013, 08:36 AM #6
07-12-2013, 06:31 PM #7
Thanks for the responses, and thanks Vtech that's the one I thought.
I am running the RRFPR now as the fuel pressure in these skis vary, and I want it right at 58psi, plus it will be there waiting for my new charger next year.
I have not heard of the 102 tunes being for newer skis, pretty sure they are an updated version of the 101 tune. I'm running the 8375 agr 102 currently and she runs amazing!
07-12-2013, 06:45 PM #8
Several people have found that stock fuel pressure was much lower than it should have been. If you aren't watching your afr its cheap insurance to get a regulator and make sure pressure is where it's supposed to be. Motors are expensive just ask......me
07-12-2013, 07:36 PM #9
to get correct afr, vtech had to up my fuel settings, then i still run about 60/61 psi static on the fuel reg to be at 12 WOT on the AFR
07-13-2013, 07:21 AM #10
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