muleskinner
Novice Class
Posts: 69
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posted November 28, 2006 05:39 PM
MUZZY ADJUSTABLE IGN ROTOR QUESTIONS
Okay I need the advise of all you 12 gurus. I installed the Muzzy adjustable rotor today. I called Muzzy and was told by one tech that most go 2.5 degrees advance TOTAL and then in another phone call with another TECH that most go 4.5 to 5 degrees total advance, but no more than 5 degrees.
So I went 5 degrees. I rode the bike and can feel a difference in low end torque. My question is, I'm not sure if I will be able to hear any ignition knock over the noise of the bike and wind. I believe that the engine ECU system has a knock sensor that will retard the timing if the sensor senses preignition. Am I right? Is my setting of 5 degrees right? The bike is stock except for a Yosh bolt on.
  
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Y2KZX12R
Needs a job
CompetitionCNC.com
Posts: 3762
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posted November 28, 2006 05:56 PM
I found 4 degrees to work well. 5 degrees wont casue any detonation. I dynoed several combos of cam timing and ignition timing and never had any detonation.
But the bike doesnt have a knock sensor anyway. It would have no way of knowing there was any detonation.
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Y2KZX12R
CompetitionCNC.com
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muleskinner
Novice Class
Posts: 69
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posted November 28, 2006 07:06 PM
 Edited By: muleskinner on 28 Nov 2006 19:08
You are right. I looked in my factory service manual for the bike and found what I thought was a knock sensor but it was really a camshaft position sensor. Why a camshaft position sensor? Would the ECU not use the ignition rotor for a crankshaft position sensor?
The reason I used five degrees is the timing marks on the rotor are so close together I was unsure how to find four degrees on the rotor.
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oldkawboy
Needs a job
Posts: 2125
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posted November 28, 2006 07:33 PM
Different combos may like different timing. Mine made the best power at 5 degrees on the dyno. I have my base gasket removed which Y2K figured was worth approx. 1/2 point of compression increase and have never experienced detonation.........that I know of.
The bike has 28,000 hard miles and is still within 1 horsepower of the best that it's ever made.
Dan
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muleskinner
Novice Class
Posts: 69
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posted November 29, 2006 02:45 PM
Great info. I just don't want to detonate the engine to death. I have seen a few that have had holes in the pistons and cracked piston skirts from detonation. I am 53 years old and can't hear well. I for sure can't hear detonation while riding my bike with all of the wind noise!
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shane661
Needs a life
Posts: 11494
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posted November 29, 2006 04:27 PM
Just a crazy question...when you remove your base gasket, what do you do to seal the cylinder to the case?
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oldkawboy
Needs a job
Posts: 2125
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posted November 29, 2006 04:33 PM
Edited By: oldkawboy on 29 Nov 2006 18:21
I just used Yamabond after a real good cleaning of the surfaces.
Dan
Oh yeah............special thanks to Y2KZX12R for the info on doing this mod!
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buddy
Expert Class
Posts: 335
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posted November 29, 2006 05:21 PM
I'd suggest you use some loctite on the little screws of the timing wheel. If you don't, if its like mine, it WILL come loose. I use 5 degrees set with the PC111R and have had no problems related to pre ignition.
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osti33
Needs a job
Posts: 2973
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posted November 29, 2006 05:37 PM
quote:
I just used Yamabond after a real good cleaning of the surfaces.
Dan
Yep same here.
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entropy
Moderator
Posts: 8671
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posted November 29, 2006 06:20 PM
i quit putting anything on the base gasket (s) or shim. no leaking yet.
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