my vtec is now running much better, but i still have a problem... it is engaging at 4000 rpm and i've heard that it should be engaging at around 5200/5800.
anybody knows how can i adjust it??

by the way the 17 secs were not real, i counted them using a cellphone , with a regular chornometer im making 15.6

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what ecu are you using? and what engine?

 

what have u dotn to the engine to make it engage so low. and how do u know its engaging at 4000, is the mad vtech that strong yo?

 

whats the average rpm's that the vtech should engage? is it different in all cars (vtech cars) and wouldnt u want that boost if u were trying to make ur car faster. like from 4000rpm instead or 5500rpm?

 

it depends on ecu

 

1. vtec
2. yes every car has a different engagement point
3. honda knew what it was doing when it set the vtec x-over. if you raise or lower it on an internall stock and/or bolt on's engine, you will lose power.

 

My '92 EX seems to switch over at or right above 4k. It's real easy to tell if you short shift to 2nd and then go full throttle from around 2k on up.
Personally, I wouldn't want it to engage any higher on my car because it doesn't have much below 4k.

Keep in mind that the car's redline and the spacing of the gears also factors into where it's set. If you shift into 2nd at the redline and the revs drop to around 4500 (like on my car) then you wouldn't want the VTEC to wait until 5200 to engage.

 

It's called staying in your power band.