Thread: Help - Where's my RPM ?
01-03-2008, 04:39 AM #1
Help - Where's my RPM ?
I have the following mods on an 03 GP1300R and can only manage 7110rpm with a 14/20 Dynafly
- Delta VForce II Reeds
- Wave eater Power Valve Couplers
- Wave eater Power Valve clips
- D Plate and Temp sensor chip
- GP1300R ONE PIECE Flame Arrestor
- Standard Ride plate
- R&D 1200 Intake grate
- Pump plug kit
- 05 pump
- Dynafly 14/20 prop
- R&D Pump Tunnel re-enforcement.
- RIVA EFI controller (Settings = G=5, Y=7, R=1.5, =7)
- 3 deg timing key (Island Racing).
- Std head 150psi
I'm in Sydney Australia. so its basically Sea Level.
Middle of summer, although today was only 27degC (80deg F), with Humidity at about 69% today when I tried.
I am using 95 Octane pump fuel which is equivelent to 91 Octane in USA
3/4 to full tank of fuel when doing these passes as well.
I did have a Dynafly 14/24 and only managed 6750rpm and now only 7110rpm with 14/20. These RPM are to low for the mods in my opinion. The Ski pulls hard through the mid range and responds well, it just seems lack of top end RPM.
any ideas on how I can get back some would be greatly apreciated...
Last edited by Autosport; 01-03-2008 at 08:08 PM.
01-03-2008, 04:45 AM #2
01-03-2008, 04:49 AM #3
01-03-2008, 04:54 AM #4
also, is all your parts setup correctly, and tuned correctly.. like for example, rideplate not in correctly.. loose top speed, and RPM...
I dont really know... sorry, goodluck!
01-03-2008, 05:06 AM #5
I ve been helping Damian out here but i am lost as well. Ski pulls hard from bottom mid at top.
Really thought the ski would pull more rpms closer to 7250-7300rpms with a stock 14/20 we are yet to GPS the ski.
Ski is running the SS and 85mm nozzle where else can we look for a few more rpms will try the 87mm nozzle but we need more rpms.
01-03-2008, 05:13 AM #6
I'm not telling you to switch to VF3...!!!! that would be stupid... I wasn't saying to. Good luck, I'm sure you'll figure it out with the people on the forum...
Last edited by HallPass; 01-03-2008 at 04:02 PM.
01-03-2008, 05:19 AM #7
What is the weather and elevation you are running in?
01-03-2008, 05:25 AM #8
Middle of summer, although today was only 27degC (80deg F),
http://au.weather.yahoo.com/ASXX/ASXX0088/index_c.html Says Humidity was 70% today when we tested.
01-03-2008, 05:48 AM #9
Well that 70% can hurt you. It is also been found by us that the 14/20's are not all 14/20's. Could be a higher pitch than you think.
I was turning my 14/20 with EFI controller, D-plate, VF3's with a 85mm nozzle at 7150+ rpms at 73 mph.
What is your mph?
01-03-2008, 06:30 AM #10
not sure on MPH yet, still have to check it with a GPS (waiting for mine to arrive in the mail).
The 14/20 prop was borrowed from a mate with similar mods on his 02 GPR with a 1300 top end, he pushes 7250rpm all day every day with the same prop
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