Thread: first run of winter modds
01-29-2007, 12:45 PM #1
first run of winter modds
guys got out today for the first run of the year after what seemed like forever in the garage just looking at ski,
set up the jet works valve with seat off as cant do with ski on trailer due to roller trailer so decided to run her out for a half hour and see if she was all good...
warmed her up for twenty mins after reading so many cold seized threads and did a couple of WOT runs and took some rpm readings and adjusted the e.f.i for the higher compression...
run #1 at 7200 rpm @72.9
run #2 at 7190 rpm @73.0
run #3 at 7180 rpm @72.7
was happy with numbers for now till i can tweek the e.f.i and set up 100%
but want the extra 50 or so rpm's out of her to get them to the max to allow a little drop in the summer
this is where i need some advice..thinking of removing the vis spout and the syphon to gain a possible 50 rpm for both....
question #1; can i gain rpm from these two small mods
question #2; will the builge pump be ok on its own if i remove the syphon line and block off the line and use jb weld..
question#3; where did the buck come from any idea how to get rid
p.s... i love the jet works my ski try's to jump out the water..
01-29-2007, 01:06 PM #2
01-29-2007, 01:33 PM #3
- Join Date
- Jul 2006
Glad to see you got it out Paul.
I left the hose conected to the visibility spout so it looks normal and just filled and smoothed JB weld in the nozzle. Same with the syphon tube, I cut it from inside the nozzle, ground it down and sanded smooth. So at a glance it all looks stock with all hoses connected (I just didnt want any silver fittings left uncovered for appearance).
I had an Intake line pop off before and the pump was able to keep up so the engine stayed dry.
How were your speeds/rpms before this round of winter mods? Thats a 14/20 your running correct? How was the weather? Since this is the first run was the fuel fresh? Those are good #s but I have a feeling it will do better. You have a good setup so I think something isnt quite right. I notice your rpms dropping a little with every run, Is your EFI rich enough? It looks like its heat soaking a little. No exhaust leaks?
Last edited by porksword; 01-29-2007 at 01:42 PM.
01-29-2007, 02:29 PM #4
no leaks i can see and i have been over and over the ski as i also think something is not right.
pump sealed and up in the hull as surgested..
fresh fuel this morning,old get drained and run in car every time she is left..
e.f.i settings are 22.214.171.124...was only going to bring the first two back a little next time and get "steved" to have a feel..
if there is something wrong or a drift i cant find it..
even had shoe holes filled..
Last edited by Hydrotherapy; 01-30-2007 at 01:05 AM.
01-29-2007, 03:20 PM #5
very close to the number I run (I do not have a buck) Can you give us a run down of ALL your mods?
01-29-2007, 05:29 PM #6
150 psi milled stock head
d plate+ 10k ohm
vf 2 reeds
loads of air mods
R&D 800 mod grate
cut R&D tabs no shims
R&D kerry plate
14/20 out the box
pump shoe sealed and right up in the hull
riva filter(no sock)
rpm's by pet 210
the buck was very bad today had to come off superman and get weight on toes at back of ski to keep the pump from unhooking felt like it was on a pivot point in middle of hull,
Last edited by Hydrotherapy; 01-29-2007 at 05:36 PM.
01-29-2007, 05:58 PM #7
- Join Date
- Jul 2006
I wonder if there is a point where the cold temps actually work against you. I would think when it gets real cold the engine would never really reach full operating temps and not run as good. The cold condenced air is good but there might be a limit to when a hotter plug is needed. I know my 2 stroke outboard when it gets in the teens runs much slower than it does when its 30-50 degrees.
01-29-2007, 06:00 PM #8
Hello Paul, put 60 thousands shims on trim tabs it should get rid of the bounce.
01-29-2007, 06:05 PM #9
01-29-2007, 06:09 PM #10
You have to try it, Alot of times you will also lose speed if you are bouncing to much because the front of the hull is going in and out of the water so that will scrub speed.
Last edited by JIM'S PERFORMANCE; 01-29-2007 at 06:12 PM.
Users Browsing this Thread
There are currently 1 users browsing this thread. (0 members and 1 guests)
By hyoctane23 in forum Polaris Open DiscussionReplies: 5Last Post: 03-11-2008, 09:06 AM
By 04RXP22 in forum 4-Tec PerformanceReplies: 36Last Post: 10-15-2007, 04:33 AM
By TxPro1200 in forum Polaris Open DiscussionReplies: 6Last Post: 06-12-2007, 02:50 PM
By konabiker47 in forum 4-Tec PerformanceReplies: 5Last Post: 06-08-2007, 11:44 PM
By steved in forum 4-Tec PerformanceReplies: 1Last Post: 04-01-2007, 11:32 AM