Thread: Supercharger Belt Keeps Breaking
10-10-2009, 05:52 AM #1
Supercharger Belt Keeps Breaking
Can anyone help with this problem. Have just modified my 07 ULTRA 250x with the help from the guys from R&D in the states and Motec here in Oz. Have fitted the R&D 1.125 to 1 supercharger pulley , ride plate ,grate fuel reg , flat filter , block off plates , K&N intake Filter , home made 2.5in exhaust , Sponsons , intercooler upgrade as done on 250xtech site and timing mod 6 degs .
Went for first run 2 days ago with the help from Motec and it was awesome to ride it was doing 8500 rpm @ 74.5mph gps ed boost was about 15 and fuel pressure at 47psi. Temp was 17 deg c
Know to the problem i shedded a belt can anyone give a few tips on tension and anything else about the belt (it is alined properly) and anyones opinion on what i have done. over all i'm pretty happy with the way it has turned out
10-10-2009, 06:48 AM #2
did you use the belt tension tool to check the proper tension? Sounds like it was over tight.
10-10-2009, 07:23 AM #3
get the tool it takes all the guess work out. also keep a close eye on those pulley bearings they don't have a good record. the extra heat generated will shred the belt if its not tentioned right.
10-10-2009, 08:42 AM #4
74.5???? that also sounds like a low speed with the Mods you have done...........
10-11-2009, 01:11 AM #5
10-11-2009, 01:14 AM #6
I know this has been recently posted but maybe someone can help. When belt brakes, what do you do again to run naturally aspirated? Can you run w/o SC as long as you want and go as fast as stock LX (55)?
10-11-2009, 01:24 AM #7
10-11-2009, 01:26 AM #8
10-11-2009, 03:21 AM #9
yes the fuelling wont be perfect,But from my personal experience it was still fine to get home on at a good speed ( sorry didnt have the GPS wuth me )
fuelling wont be to bad as the MAP sensor WONT see boost pressure !
so the engine wont be that RICH
engines mapped by OEM's usually have a full fuel map which will have many load points covered be it boost and aspirated to a good degree for safety and drivability.
10-11-2009, 05:08 AM #10
I have R&D plate and Aquavein Grate also had just under 1/2 a tank of fuel.
With the belt breaking i didn't Think i had a screw driver with me but now i think about it i have one in the tool kit under rear seat but anyway i just limped back to boat ramp at 2000 rpm it wouldn't go any harder.
To get the fuel pressure right i had a lamda sensor in the exhaust set up with the Motec.
I am getting belt tensioner tool tommorow hopefully this will help me set it up right
Users Browsing this Thread
There are currently 1 users browsing this thread. (0 members and 1 guests)
By xxxshowdownxxx in forum Kawasaki PWC Performance (4-stroke)Replies: 5Last Post: 10-01-2007, 10:38 PM
By born riding in forum Kawasaki PWC Performance (4-stroke)Replies: 4Last Post: 07-06-2007, 09:17 AM
By born riding in forum Kawasaki PWC Performance (4-stroke)Replies: 6Last Post: 07-03-2007, 11:18 AM
By nickdog in forum 4-Tec PerformanceReplies: 12Last Post: 12-13-2006, 06:18 PM
By rapidacceleration in forum 4-Tec PerformanceReplies: 32Last Post: 02-17-2006, 12:28 AM