Si2k

VTEC is not only engine speed dependant, also has throttle input as a parameter for engagement

m1bjr

Are you guys racing these things or what?
On a road car, I just dont get it, sorry....

MB

You'd be surprised how spritely it can make the car Steve ECU changes are very good for topping off a combination of breathing mods too.

s2konroids

Each to there own.

Its personalization, theres many of us who dont mod and many of us who do.

Its like having a PC and modifying (adding RAM etc) that to run games better/faster etc, but you dont have to. (Poor analogy but you know what i mean )

I can understand your point though.

Personally i find it fun and interesting.

Bibbs

I'd suggest setting the vtec point to where the two power curves cross.

MB

5250 IIRC?

Bibbs

Depends on the mods.

With the basics (exhaust, de-cat) Headly @ Millway set mine (with a VAFC) to about 5250 and smoothed out the dip at cross over.

With the snail, Mase set the point at 4500 as it was best for the amount of air being flowed.

Bibbs

I can see the advantage of this with the gears as with them being shorter, it'll be harder to keep the car "in the zone".

Not sure I could handle having a 150 top end though, as that would be a killer on long drives. I'd need a 7th gear (I sometimes feel I need one now).

MB

When you said where the power curves cross, I assumed you meant pwoer and torque - due to their relationship they will always crossover at the same rpm on any car and dyno. I think it was 5250.

Its a good way to spot a fudged dyno plot.

lovegroova

On a standard car, when you change up a gear at max rpm, it drops you back to the bottom of the VTEC range, does this still occur with new gears? If not, that would be a good starting point for VTEC engagement, alternatively, probably 500rpm lower wouldn't be a bad idea.