Thread: 3RUDE peak Boost numbers
07-05-2009, 09:50 AM #1
3RUDE peak Boost numbers
Nils was kind enough to let me borrow a 3Rude for testing. So I'll post my results.
I don't want this to start into another closed thread comparing ET race to 3 Rude... bla..bla...
Granted there are bigger wheels out there...and so forth... but I just wanted to post my results from my testing on just this wheel and give others a brief glimpse of Nils new 3Rude charger and boost numbers I got.
So far I've put about 21 hours on the charger to this date. At 10 hours I had to shim it back to specs since I was abusing the hell out of it and was told I would need to shim after inital breakin period. I took this charger into 3 foot chop and flat water daily checking boost and reliability.
It's an AWESOME CHARGER to say the least. Maybe too powerful for recreational use on a daily RXPX.
It was consistantly 17.5-18bs of boost from day one till about 10-11hours when I had to reshim it to bring the clutch up to specs since it started to slip to 15lbs of boost. Granted 15-16 lbs of boost is still consistanly good, but I wanted that 18lbs back.
Since the intial breakin and reshim I've been just racing on flat water and 1-2 foot chop max and I check the slip daily. It's stayed consistant at the set point and so far I've got 11 hours more with boost levels at 18lbs at 8560rpm. I think once broken in after the first inital shim it holding slip pretty good for making such high boost numbers. I've got another 11 hours on this charger without major issues and still going strong.
Granted there are bigger wheels out there that make more boost, but I wanted something reliable for recreational use and didn't want to reshim the charger on a daily basis. So far I think after the intial breakin this charger is holding boost and slip just like a 2Rude but with slightly more boost.
So far my bst levels are 16.8-18lbs average depending on weather. I've hit a peak of 19.6 lbs at 8600 rpm of boost yesterday with high 70 degree weather. I was on the Riva ECU limiter due to the colder weather. I've have a upgraded walbro fuel pump in tank with a Rude RRFPR set at 60. My AFR at WOT was 11.8-12.0 consitantly during all this testing. Yesterday I was a tad lean at 12.2-12.4 at WOT when I got my peak numbers of 19-19.6lbs of boost.
I've attached a few pictures.
My peak boost number on my plx devices multi gauge---BST = 19.6 on the 4 screen display is the top number.
I can change screens to different gauges that read AFR, Water temp, EGT, and Boost.
Thanks Nils, Jerry, and Dan(JD1) for all the help.
07-05-2009, 10:04 AM #2
Orsom write up with great results thanks for the info
Love the Gauge in the Mirror what is the make and model ?
07-05-2009, 10:45 AM #3
i bet that baby SCRRRREEEEEAAAAAMMMMMS at 19psi
the gauge install is nice!
07-05-2009, 10:55 AM #4
Some videos of the gauge:
You tube video of how gauge works:
I have the sensor modules installed.
2). Water Temp--for open loop cooling
3). AirFuel Wideband-self calibrating (so far lasting 21 hours in the ski on same sensor)
07-05-2009, 02:30 PM #5
Did you have to run race gas or a mix with the charger? That 3Rude would be a nice increase over my 2Rude.
07-05-2009, 03:50 PM #6
Alex13, it's still in the testing phase. I know Nils has a bigger wheel for the 3RUDE which will out perform the wheel I got to test. I can't even imagine anymore boost for a rec boat.
Thanks Nils for allowing me to test this charger out.
It's moving on to the next boat.
07-05-2009, 04:19 PM #7
that is bad ass!!! and on pump gas!!
07-05-2009, 05:15 PM #8
07-05-2009, 05:19 PM #9
and BTW this supercharger makes a solid 19+ psi at 8750 RPM and peaks at 20+ PSI
07-05-2009, 05:24 PM #10
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