Thanks Delbert. Been trying to figure out where to gap the valve clearance too, closer to the minimum spec or closer to the maximum spec? Doing some research on it and a couple automobile forums state it is best to "shoot" for the mid range of the spec being that the valve (at minimum spec clearance) stays open longer and will burn up the valve "quicker"; the theory, (from what I've been researching) is that the valve dispurses heat whilst in the closed state through the head. Not sure if that applies to the busa, but makes sense in theory from an engine standpoint.
This is a snippet of the thread that persuaded me to redo my clearances from what I got now.
"Adjusting valve clearances for "maximum performance" depends on quantifying what you consider performance. If you want maximum horsepower at higher rpms, then you want to maintain your valve clearances as low as possible within specs (.03 mm). Like KevinC said, the valves will open sooner and stay open longer. But, there is no free lunch. Having valves that stay open longer mean they spend less time closed, which is where heat from the valves is disippated to the cylinder head. Hotter valves, even if kept within tolerances, will wear out more quickly.
In my book, there are less-risky ways to obtain what little gain you obtain from running valve clearances on the razor's edge. My goal is to retain clearances within the standard of .03 to .05mm, and leave it at that; but my ideal of maximum performance is to have the engine lead a long and happy life, not peak horsepower"
Right now I'm right ON the minimum spec on every valve and was quite proud of myself for accomplishing that until I questioned that accomplishment. So I've order more shims .05mm thinner than what I got in there now to open up the clearances to more over the mid range clearance. Let the wait game begin on snail mail to deliver my thinner shims.
The stealership told me to spec them all at the maximum range side of the spec. Who knows, i'm figuring if I'm in the middle somewhat, I should be good to go.
This is a snippet of the thread that persuaded me to redo my clearances from what I got now.
"Adjusting valve clearances for "maximum performance" depends on quantifying what you consider performance. If you want maximum horsepower at higher rpms, then you want to maintain your valve clearances as low as possible within specs (.03 mm). Like KevinC said, the valves will open sooner and stay open longer. But, there is no free lunch. Having valves that stay open longer mean they spend less time closed, which is where heat from the valves is disippated to the cylinder head. Hotter valves, even if kept within tolerances, will wear out more quickly.
In my book, there are less-risky ways to obtain what little gain you obtain from running valve clearances on the razor's edge. My goal is to retain clearances within the standard of .03 to .05mm, and leave it at that; but my ideal of maximum performance is to have the engine lead a long and happy life, not peak horsepower"
Right now I'm right ON the minimum spec on every valve and was quite proud of myself for accomplishing that until I questioned that accomplishment. So I've order more shims .05mm thinner than what I got in there now to open up the clearances to more over the mid range clearance. Let the wait game begin on snail mail to deliver my thinner shims.
The stealership told me to spec them all at the maximum range side of the spec. Who knows, i'm figuring if I'm in the middle somewhat, I should be good to go.
cant wait to see this vid , good luck 
lease:
