06-04-2008, 05:07 AM #1
Ultra 250 9.5-1 Compression Ratio Piston Kit
The R&D High Compression Piston Kit is designed to boost overall compression for increased horsepower throughout the entire RPM range. Designed for closed course racing and race gas.Pt. # 431-25095
Seems like we are moving up.
I was told that it only works with the Ultra 250X Supercharger Stage 1 Engine Kit
06-04-2008, 06:39 AM #2
I wonder if they are using the stock rings
06-04-2008, 06:54 AM #3
06-04-2008, 08:06 AM #4
8.5-1 to 9.0-1 might work without race gas, if some 1 were to make them.
Raising the compression ratio should provide significant gaines, especially with more boost.
06-04-2008, 10:33 AM #5
more boost and higher compression more than likely will require race gas 9.0-9.5:1 compression on a forced induction motor is dancing with race gas territory.... you tune in the ecu would gave to be spot on for it to work and no detonate
06-04-2008, 05:16 PM #6
Users Browsing this Thread
There are currently 1 users browsing this thread. (0 members and 1 guests)
By eazygoin in forum Kawasaki PWC Performance (4-stroke)Replies: 15Last Post: 01-08-2010, 06:56 PM
By smokeysevin in forum Kawasaki ClassifiedsReplies: 1Last Post: 08-28-2009, 07:56 PM
By Skips313 in forum Kawasaki PWC Performance (4-stroke)Replies: 8Last Post: 07-14-2009, 02:46 PM
By Green Hulk in forum Kawasaki PWC Performance (4-stroke)Replies: 0Last Post: 10-02-2007, 01:09 PM
By GODOSIDIS in forum Kawasaki PWC Performance (4-stroke)Replies: 26Last Post: 09-22-2007, 05:02 AM