Thread: 150 psi too much?
06-11-2010, 04:14 PM #1
150 psi too much?
i just did a compression test in all 3 of my cylinders and they are at 150psi. i read somewhere here that that may be too much? if so how do i correct this? the camshaft gear's line sit perfectly flat with the head (1503 lines)
06-11-2010, 05:31 PM #2
- Join Date
- Jul 2005
- euxton nr chorley lancashire, england
150psi is good
06-11-2010, 07:41 PM #3
Excellent numbers, and superb balance across all three.
I would not complain.
06-12-2010, 08:00 AM #4
wow perfect compression. ussually you will see from 135psi to 145 psi in the 4-tecs...
06-12-2010, 08:37 AM #5
04-05 cams Must be 145PSI
06+ cams Must be 140PSI
ROtax b kit cam Must be 135 PSI
06-12-2010, 11:05 AM #6
thanks for the info guys, engine runs great except for a crazy boost leak that i can't seem to trace. i was running 13 psi at 8100 with stock ecu and now with rr ecu i'm only doing 12psi at 8200. is this normal with the ecu or should i be getting the same numbers regardless? i pressurised the system at 30 psi and found only trickle leaks
06-12-2010, 11:23 AM #7
06-12-2010, 11:26 AM #8
The stock plastic manifold normally would explode, or leak over 25psi
06-13-2010, 03:09 AM #9
could it really be a bad boost gauge? im running 79 at 8400rpm, is this what a rude1 is supposed to do?
Users Browsing this Thread
There are currently 1 users browsing this thread. (0 members and 1 guests)
By beerdart in forum Polaris ProjectsReplies: 350Last Post: 09-24-2015, 08:07 PM
By BBCaprice in forum Polaris PWC PerformanceReplies: 81Last Post: 04-29-2008, 09:41 PM
By Martin in forum Yamaha PWC Performance (2-stroke)Replies: 7Last Post: 10-29-2007, 10:24 PM
By LS2000 Cop in forum Yamaha PWC Performance (2-stroke)Replies: 3Last Post: 10-19-2007, 11:28 PM
By sbogi in forum Yamaha PWC Performance (2-stroke)Replies: 13Last Post: 09-06-2006, 08:16 PM