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beatr911 · 03-07-2008, 03:11 PM

Ignition timing can show a definite benefit. I've timed by ear since '82 with no detrimental effects yet. Advance until you get ping in your usual driving then retard 2 or 3 degrees. Runs smoother, 1 or 2 mpg better.

So what about the other timing, the cam? Has anyone advanced the cam timing to optimize power production in the low rpm regime? Should be worth a few MPG. I'm currently testing a 7* exhaust cam advance on the Kawasaki, much improved low and mid range due to decreased valve overlap and increased dynamic cylinder pressure. This is a DOHC motor so it's relatively easy to do. Once I run out the old gas from the winter there should be some good data to post.

Many of us have single cam motors and data on these would be helpful. CoyoteX did you experiment with cam timing? Results?

03-07-2008, 03:11 PM	#4 (permalink)
beatr911 Master EcoModder Join Date: Feb 2008 Location: West Coast, USA Posts: 516 B2300 - '96 Mazda B2300 SE Focus - '05 Ford Focus ST The red car - '00 Honda Insight Thanks: 6 Thanked 77 Times in 56 Posts	Timing - The cam Ignition timing can show a definite benefit. I've timed by ear since '82 with no detrimental effects yet. Advance until you get ping in your usual driving then retard 2 or 3 degrees. Runs smoother, 1 or 2 mpg better. So what about the other timing, the cam? Has anyone advanced the cam timing to optimize power production in the low rpm regime? Should be worth a few MPG. I'm currently testing a 7* exhaust cam advance on the Kawasaki, much improved low and mid range due to decreased valve overlap and increased dynamic cylinder pressure. This is a DOHC motor so it's relatively easy to do. Once I run out the old gas from the winter there should be some good data to post. Many of us have single cam motors and data on these would be helpful. CoyoteX did you experiment with cam timing? Results? __________________ Good design is simple. Getting there isn't.