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Discussion Starter #1
So what do you guys plan on using when you want to work with the fuel or ignition mapping? I was planning on using a Megasquirt once I design my cams and find a way to adjust the mechanical timing. This is my first bike, so my thinking is based on what I'd do on a car engine, so let me know if a Megasquirt doesn't make sense for a bike engine, or if there's a simpler alternative for such an engine. I am not interested in running a piggyback for various reasons. However, any and all opinions will be appreciated. Thanks!
 

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Whenever they come out with a replacement ECU, complete with adjustable redline, fuel delivery, and ignition mapping, I plan on doing as much research as possible to do the tune myself or find someone who has a lot of experience tuning with the particular program and engine combination.
 

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Hell yeah.

I wonder what just bumping the redline up 1000rpm would do for the bike in stock trim? Avoid the ignition cut that happens above 10.5k rpm and let it keep pulling. Would definitely be nice to be able to downshift at 75 mph and get a little bit more pull to get around someone on the interstate, then shift back up to 6th and keep on rolling.
 

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Discussion Starter #6
You won't make any more power at that RPM, if you're curious. That's probably way past the efficiency of the camshafts. To make any power at those RPMs, you'll need a cam with higher duration and/or lift and/or overlap. Once adjustable cam sprockets are released, then it will make sense to raise the RPM.
 

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The stock ones are adjustable, supposedly. I haven't pulled the cover off to see personally, but supposedly they are key-less and can be tuned a bit.

But yeah, I do see the value of higher lift/duration cams in a higher rpm application.

I would assume the bottom end would be able to handle the higher speeds without upgrading much hardware.
 

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Discussion Starter #8
Most definitely, yes. The bottom end should be able to take atleast another 1000 rpm without any significant modifications.

Anything beyond that and you will need to find ways to reduce friction, weight and fasten the rod cap properly. If the stock ones are adjustable, a lot of fun is to be had right from the moment the bike is riden out of the showroom :D
 

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I wonder how much ECU tuning would be required with such an adjustment? And more precisely, if gains could be made utilizing the stock ECU and cam timing adjustments?

Obviously the ignition timing would need to match the timing of the valves opening and closing as well as the timing of the piston coming to TDC, and fuel injection would need to be timed also, all requiring changes to the ECU's parameters.
 
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