Thread: Extending J-pipe - Help...
03-14-2009, 06:56 AM #1
Extending J-pipe - Help...
I need some help, I'm finding the TDR water box way to loud in my GPRXP for a social ski so i'm installing a standard RXP water box. due to the shape of the GPR, the hull pushes the water box just a little to much towards the centre of the ski causing the J-pipe to twist meaning the bottom water jacket outlet hits the SC housing so I need to extend the J-pipe.
The three options I have - two bellow from Jerry's store, which will extend the J-pipe the furthest?
The third option is build an extention my self (as I'd rather it be longer) but I was told as this part isn't water Jacketed, if its too long it will creat to much heat and start melting coolant/water hoses in the area? Is this correct? and is there any other solutions?
Also... anyone know in MPH, how much RPM or MPH I am likely to loose by using the factory water box (this isn't a great issue for me though).
03-14-2009, 10:04 AM #2
Why not just add the GPR sound suppression ? A couple others have done it. I was able to get the top house to work perfect. Just need to extend the bottom one a little.
03-14-2009, 11:31 AM #3
03-14-2009, 12:22 PM #4
03-14-2009, 12:24 PM #5
i have a gpr sound suppression setup if anyone wants to buy it. Email below.
03-14-2009, 01:27 PM #6
03-14-2009, 01:32 PM #7
It MAY go into the OEM inlet, but then you are going to have to do something to the outlet to get it connected to the GPR outlet in the tunnel. I talked to mark before I mod'ed the RXP box to fit and his/our biggest concern is that the RXP boxes have been known to blow apart. My thinking is that since I gutted the RXP box and added a bigger outlet to work with the blue FF hose, it reduced the pressure in the box so there is nothing to worry about. I dont know if my theory is correct or not. Only time will tell.
03-14-2009, 03:44 PM #8
03-14-2009, 04:04 PM #9
03-14-2009, 04:53 PM #10
The biggest problem is the kink in the GPR hull that pushes the water box towards the center of the hull, causing the J-pipe to twist and the bottom water jacket feed to hit the supercharger. To me yesterday it looked as though extending the J-pipe would resolve this issue
PS: pictures borrowed from Vigilante thread
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