So in the ap1 vtec cross over occurs at 6k. When that happens is it best for the engine longevity to go wot or half or 3/4 throttle? In other words if I'm hitting vtec at 3/4 throttle and not mashing the gas is there the chance I will run lean or maybe rich at that point. What about wot am I running super rich and could get same acceleration with 3/4 throttle...just thinking out loud

 

Get a wideband and u'll see how rich it runs.

 

I have no idea or technical expertise. But, it seems like it shouldn't hurt it...as if you were going around a turn (on a track) at 6k or above you wouldn't necessarily be WOT. You might be applying no gas, or feathering, etc...

 

Enjoy car, blow engine, buy used engine, repeat.

 

It's really not going to make that much of a difference, if any. The truth is that this car was made to rev high so just do exactly that and have fun

 

Does VTEC even engage at 6k rpm at 3/4 throttle?

 

+1.
You shouldn't be afraid to break it. If it breaks, fix it. I would much rather enjoy the car for 20,000 miles and have it break than drive it like a granny for 200,000 miles.

 

My vetc engages at partial throttle, it is not as dramatic...perhaps the cpu controls this and remembers when i want to go where the gas pedal is located and just compensates?