07-20-2007, 09:11 PM #1
Need Some Help Dont Know Whats Up?
ok i was running 67.3 with the 14/20 @ 6700 with my rius(o-ring) heads(135psi) and the stinger3, with a mild stinger (59) advent curve,snap 60,, no holes filled,,,,, ,
then i put the stock exhaust back on, riva heads 41cc only(125psi)... 3-gaskets, changed the curve to advent curve (83), snap 61,, no holes filled, still 14/20 @ 6800 only 63.6
tonight i just switcehd the curve to the aggressive curve (84), holes filled, and now with the new 13/19 @ 7030 60.5
everytime i think im helping it slows down,, my thinking was to drop the pitch raise my rpms and hit powerband which would put me over 70,, it did raise my rpms but now im going my slowest ever, and rpms still arent high enough.. .should i keep dropping my pitch,,, surely i can push a 13/19....im stuck and its pissing me off.....help i just wanna go 70 and i was so close........what the fuck
07-20-2007, 09:30 PM #2
- Join Date
- May 2006
STOP more rpms mean more speed UNLESS you have hull trouble. mainly you pump shoe is ripping out or leaking at the rear where the felt pecie went.
Ck that and also you could have a big pecie of the vein in the pump missing.
In other words you working on the wrong end. Get the hull working then the speed will be higher.
07-20-2007, 09:36 PM #3
......i got more rpms and less speed,,,,hull didnt change, except holes filled,,,,, i just put new 05 inserts in so i doubt the pump shoe is ripping out,,, dont have the felt but i didnt when i was going 67 either,,,, veins are fine....
07-20-2007, 09:50 PM #4
07-20-2007, 10:04 PM #5
so what are you saying,, get my rideplate cut so i can raise the nose up? sand the bottom,, make sure the shoe isnt hanging low, i know thats not gonna bring me back up to where i was....the bottomline is i was going 8 mph more with the same hull setup...
07-20-2007, 10:08 PM #6
For your rpms to be were they are and the speeds dropping that bad means something dramatic is happening, most likely the shoe is pulling thru the hull.
Have you updated to the 04 and up pump shoe brackets?
07-20-2007, 10:10 PM #7
07-20-2007, 11:02 PM #8
yep just put them in the other day..
I would say you messed something up when you did.
I would pull the pump and start over your turning the rpm somethings wrong in the PUMP or plate area.
07-21-2007, 02:32 PM #9
ok i will double check everything, also my 13/19 isnt checked and its a true 13/19 not 14/20 depitched like i shoulda done,,,,,does having the bigger hub(14/20)depitched work that much better than regular 13/19?
07-21-2007, 02:37 PM #10
yep, as long as you have the power to push it. For flat out speed you need the bigger hub.
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