04-28-2015, 01:31 PM #1
Anyone test the new VTech tunes yet?
Wondering if anyone has tested the new VTech tunes yet? If so, did you log the runs, which one, what are your mods, what were your results, and what AFR did you see?
- Stock file No Speed lim
- 48 8250 35 34 101
- 48 8350 35 34 101
Last edited by Gus13letter; 04-30-2015 at 05:53 PM.
04-28-2015, 01:55 PM #2
You will run out of Injector Duty Cycle on a cool day at stock fuel pressures with stock injectors. At higher fuel pressures the pump is on the edge of failure.
04-30-2015, 02:27 AM #3
04-30-2015, 01:45 PM #4
Ok, sounds legit.
So, which pump would u say is the way to go?
Thinking of running 8500 36 39 next year. For now i ll stick with 8350 170 35 34 tune,with 1100 injectors...but stock pump (or the one u ll suggest)
04-30-2015, 02:07 PM #5
My stock pump and regulator keeps up just fine to 8400 RPM and 180 KPA. I happen to have a digital fuel pressure gauge mounted to one of my mirrors so I can watch it at WOT. About 59 at idle and 56.5 at WOT.
04-30-2015, 02:19 PM #6
- Join Date
- May 2013
- Grand Lake, OK
Going out on the water tomorrow after I throw in the VT1100's.
04-30-2015, 02:25 PM #7
Make sure you grab a VT1100 base tune before you even start it.
04-30-2015, 04:56 PM #8
my buddy is running the stock file tune limiter removed running at most 8180 rpms with a 15/20 prop im sure he will chime in speeds are very impressive gus this is the guy i told you about we put a fuel pressure regi on today.the tune your looking at with the 34/35 timing might be alittle differnt i have to double check i believe the one hes running has lower timing
04-30-2015, 05:02 PM #9
i just realized i read it wrong but yea hes running the stock file limiter removed its 30 degrees of timing over 8000 rpms we did back to back testing with that tune the one you are asking about and the 8375 with 38 degrees timing and his highest speed was done with stock file tune. mods are 15/20 stock airbox with hoses directed into front of box fizzle and fpr
04-30-2015, 05:03 PM #10
I'm running the stock file with no speed limiter. I don't have any way of logging but it would have to be safe. The only change is no speed limiter. Ski runs ~74 now on a 15/20r. Ski is a rxt x 260.
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