Thread: Pump Pressure Data
09-01-2007, 09:26 PM #1
Pump Pressure Data
After rebuilding my ported 1300 I added a pressure gauge to moniter pump pressure. Very interesting findings just during breakin.
At 20/30mph the pump already had 10-15psi ! At 50mph the pressure had climbed to 20. Keep in mind this is with 2 3/8 lines bleeding pressure off at the 2" extension.
It was noticeable when the valves would open causing the gauge to flutter and rapidly drop but as speed increased to over 65 the pressure would start to rise around 30+psi again!
This came to quite a shock to me! Especially with 5 times the amount of area being relived as first thought necessary.
I will keep posted of full throttle results as the motor is broke in.
09-01-2007, 09:35 PM #2
09-01-2007, 10:58 PM #3
Pretty cool, to see the differences, isn't it!
09-01-2007, 11:01 PM #4
- approx 10psi at 35mph.
- approx 20psi at 55mph.
- approx 40psi at 65mph, and up.
This was with a single 3/8" relief.
09-03-2007, 09:44 AM #5
Another note is that I have gone 170 miles through the river and even took a couple shortcuts through some wet grass and the valves never clogged yet. I hope yours was a just a freak event on Lake Pleasent that day because I sure like the way the valves have worked so far.
09-03-2007, 11:23 AM #6
Im still not convinced this is the only answer to the buck. Not saying you guys are saying it is.
My ski 84.8 mph , no buc at all not even a hint. Two holes drilled under the intake grate and a modified 800 grate. Smooth as silk. I guess we will have to wait and see what happens at 85 plus to be sure. So far So Good!
09-03-2007, 11:33 AM #7
09-03-2007, 11:49 AM #8
09-03-2007, 11:54 AM #9
09-03-2007, 11:58 AM #10
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