Thread: 15/22r @ 8400 rpms
12-14-2011, 03:38 AM #1
15/22r @ 8400 rpms
I have just got back in from testing my ski. I finally managed to get some calm(ish) water and wanted some opinions on my rpms.
The ski was hauling ass and didnt miss a beat all day which I was happy about. I can finally enjoy riding for a while and put the tools down
I set my fuel pressure to about 48psi (key pressure, with boost reference attached), and AFRs were - idle - 11.3, mid 12.7, WOT ~ 11.5ish, so I think thats about as close as Im going to get. I was turning 8400 rpm with an untouched 15/22r and stock nozzle.
From experience - Anyone care to guess what speed I was doing? I was expecting to see my rpms a little higher, should this have been the case?
12-14-2011, 03:45 AM #2
- Join Date
- Jun 2008
- GREECE ATHENS , NAXOS
I did 71mph on a GTX with a untouched 15/22 at 8000rpm!
I say you are on high 70s!
12-14-2011, 04:06 AM #3
i agree, high 70's for sure depending on conditions ofcourse, but..
u got an iphone, there's a freebie app that gives you speed reading, records your highest speed, in mph,kph or knots - real easy to use.
compared the results to my garmon on the water and was pretty accurate
i got a cheapie waterproof cover and had no probs in 2 years
12-14-2011, 04:24 AM #4
I was thinking It would be around there. I was really hoping to join the 80 club, but that doesn't look likely without a bit of tweaking. And at the moment, I just want to ride the thing!!
I was going to try the iPhone app, but I had no coverage where I was :/ I'll get another gps before too long and find out for sure. I've seen a few people getting 75 with an untouched 15/22 and stock ecu, so hopefully I'm not too far from 80.
12-14-2011, 05:12 AM #5
im finishing off a mate rxpx with a xx charger ecu reflashed 8800 for 60lb inj and running a 15/21 with few other mods, let see what it runs this weekend interested in seeing what yours will do. what rpm is your rev set at
12-14-2011, 05:32 AM #6
12-14-2011, 06:41 AM #7
On my x i managed 82.3 with a riva ecu at 8600. Lean it up a tad and shoot for 8550.
12-14-2011, 06:50 AM #8
12-14-2011, 07:10 AM #9
How much excess oil can cause a loss of rpm? I did notice after that mine was around the top bend.
12-14-2011, 08:12 AM #10
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