canadamaxxer
Pro
Posts: 1090
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posted September 04, 2005 03:05 PM
The (mis)adventures of Canadamaxxer....part 2
After our wedding was done, I woke up one morning and realized that I had only a few weeks to get my bike ready for Sportbike West. In the simplest terms, this was no big deal, but I had committed myself to competing in the "Winner Take All" dyno class at the event. I push Banana Bike Man very hard to get this class going, and to then not participate would have been pretty lame in my eyes.
I had been working on a nitrous system for my 12R since the middle of last winter and had the distribution assembly built and ready to install. I had purchased all of the components (solenoids, jets, progressive controller, EFIR, TPS window switch, fuel pressure regulator, etc) so "all" I had to do was whip the kit together and get it installed. This turned out to be a much bigger job than I had anticipated. I got the kit installed and dry tested by the tuesday before we were to leave for SBW. I made arrangements to hit the dyno on wednesday evening. I really needed to know what the A/F ratio was going to end up at, and to get an idea of what kind of HP I was to be getting. I had jetted the kit using the chart on the Schnitz website and was aiming for a gain of 150 HP. I knew this was a big shot, but I figured that the progressive controller would make things hit less hard, a so would potentially allow a bigger shot.
I went to see Chad at Echo Cycle in Edmonton. We put the bike on the dyno and did some baseline tuning on the powercommander. The bike put out a solid 181 HP, and ran very well. We armed the nitrous and ran the bike up on the dyno. Our intent was to just blip the nitrous to confirm that the A/F was not was out to lunch. The initial spike on the dyno, as the nitrous hit was266 hp or a GAIN of 143 HP at 6500 rpm. The bike was so violent in its' accelleration that it was smoking the rear tire and STILL putting out over 300 HP. We ran the bike up again to confirm the results, and to run the system just a bit longer, and the results were the same. Chad was caught somewhere between fear and the coolest thing he'd ever seen. We began to chat about what was happening and discovered that the Schnitz jetting chart is WAAAAAAY off. According to multiple other sources we found online, I was actually jetted for an excess of 200 HP GAIN. I bought a set of smaller jets from him, and went home and got to work. I got the jets changed and returned the next day to resume testing.
It was a cold rainy day, so the bottle temperature (and therefore pressure) was very low. We heated the bottle until it was sitting at about 950 psi and then warmed the bike up. We did 3 runs that evening to set the fuel pressure and confirm proper operation. I had the progressive controller set to 20% initial hit and progressive application over 8 seconds. With this setup we were seeing 300+HP, and the engine was taking 1.5 seconds from the time the nitrous came on (6500 rpm)until the nitrous cut out (at 10,500 rpm). The means that the solenoids were only open 35% by the time the system cut out. We were puzzled.......300hp -180 hp = 120 hp gain.......but only at 35% solenoid pulsing. We pondered what would happen if we sped the rate of progression on the controller up to 3 seconds. technically that would put the solenoids far closer to opening fully by the time the system cut out. We reset the controller and ran the bike again. As the nitrous came on, the rear tire spun again and the bike's rpm flashed up to the rev limiter faster than a person can snap their fingers. Chad pulled the clutch in and killed the engine immediately. I asked what happened....to which he replied that the oil pressure light came on. He nervously asked me if I wanted to restart the bike.....I replied that if there was damage done, idling the bike for 2 seconds wouldn't do anymore real harm....BUT if the oil pump cavitated, we needed to know that the bike was ok. We restarted the bike, and the light stayed on......but there was no knocking or anything.
I took the bike home, and pulled the oil pump. The drive for the pump had been sheared off. The only thing I can surmise is that the pump essentially hydraulic'd and sheared off the drive due to the rate of rpm change as a result of the tire slipping on the dyno drum. I pulled the oil pan off and found a few pieces of bearing material. I then knew that there was no way I was taking that bike out to SBW.
  
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zrxdean
Needs a job
Posts: 2225
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posted September 04, 2005 03:29 PM
 Edited By: zrxdean on 4 Sep 2005 16:31
Bittersweet results. Great power, but now you're going to learn the new weak points of your motor.
I think it's accepted that progressive controllers don't ramp accurately. Even if you have a small start %, the hit will be hard and fast. If you really want to start at 40% and get to 100% in 1 second, you may need to start at 20 and ramp across 3 seconds. I don't think the pulsing can really be effective, at least with common solenoids and controllers. I've heard the UK pulsoids and NX box are better than most.
Good luck, hope your crank is OK.
Dean
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frEEk
Administrator
ummm... yeah
Posts: 9660
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posted September 05, 2005 12:34 PM
damn dude, i know u already told me about ur system at SBW, but that is just nuts! damn shame coudlnt get it out for the shoot-out
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canadamaxxer
Pro
Posts: 1090
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posted September 05, 2005 02:48 PM
just wait 'til next year......
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lizard
Pro
Modulator
Posts: 1483
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posted September 05, 2005 05:17 PM
Edited By: lizard on 5 Sep 2005 18:18
I'm not lending my GT 80 next year!
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canadamaxxer
Pro
Posts: 1090
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posted September 05, 2005 05:43 PM
Edited By: canadamaxxer on 5 Sep 2005 18:43
I will have my own gt 80 next year........
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lizard
Pro
Modulator
Posts: 1483
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posted September 05, 2005 05:57 PM
Edited By: lizard on 12 Oct 2005 07:07
He he he............. We will rule Oliver!!!!!!
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trenace
Needs a job
Posts: 3056
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posted September 05, 2005 06:01 PM
Edited By: trenace on 5 Sep 2005 19:02
Lizard, you mean GT 80 as in Yamaha GT-80, e.g. circa 1974? Pics? (Sorry, Canadamaxxer, no thread-hijacking but only momentary diversion intended! Glad your motor survived OK, sorry you did not get the results you wanted with the motor ready in time!)
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canadamaxxer
Pro
Posts: 1090
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posted September 05, 2005 06:03 PM
quote:
Lizard, you mean GT 80 as in Yamaha GT-80, e.g. circa 1974? Pics?
Oh yeah baby!!! we will kick the pocket bikers' asses on those rockets....
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rac4it
Needs a job
Bergie
Posts: 3009
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posted October 12, 2005 06:21 AM
all that and you could almost achieve the same results with just a single solenoid dry shot
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