Internal and a few exhaust part pics
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I disagree about the difference in performance that can occur from a few thousanths of an inch of clearance. The first time I adjusted the valves in my S2000, I accidentally set the clearance by mearsuring between the cam lobe and roller rocker. This meant that my clearances wound up being about .003" too large. There were some interesting changes to the sound of the engine at WOT, and the VTEC kick was much more pronounced. Unfortunately, when I attended an S2000 club dyno day, my low end power was significantly lower than everyone else's. After discovering my error and fixing it, my dyno's looked like everyone else's again.
My belief is that Honda specs their clearances really high to give it a 100K service interval. I find it hard to believe that the S2000 really needs the .008" for the intake valves and .009" for the exhaust. I ran .001" below minimum spec for years without problems
My belief is that Honda specs their clearances really high to give it a 100K service interval. I find it hard to believe that the S2000 really needs the .008" for the intake valves and .009" for the exhaust. I ran .001" below minimum spec for years without problems
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