VTEC question

[benjerman112]

A friend of mine wired it up to the hi beams i'll ask him he did it and i'll get back to you.

[93F22A6]

Wow, ok. I said I had an idea didn't say it was a good one.

[benjerman112]

ok this is what my friend said
oh, lol... that? is easy, just splice the wire coming from the vtec solenoid to a switch that has power. i just spliced it into the headlights temporarily cause my ecu wasn't engaging it... just run a cable from the fuse box to a switch and into the vtec solenoid, but u gotta be careful not 2 leave it on or u'll fry it

[preludeman92]

I know a few civic guys with mini-me swaps that have done this because they are too lazy/cheap to wire VTEC and get it going right. The SOHC VTEC motors would be less prone to drivability problems from this since their VTEC is more for fuel economy than anything else.
The performance DOHC VTEC motors would seriously suffer from doing this, but you could easily do it.

[BLUBB2]

Some people have had different experiences some say 5200 and others say 5400. So its wierd.

Im pretty sure its 5200

[GhostAccord]

VTEC engagement has certain parameters that must be reached in order to operate. It doesn't just switch on at the exact same RPM all the time. It may seem like it does but it does engage according to certain conditions the ECU receives.

H22A1
RPM = 4900 and higher (depending on manifold pressure)
Vehicle Speed = 30 km/h (19mph) of faster
ECT = 60°C (140°F) or higher
Engine Load = Judged by intake manifold negative pressure

F22B1
RPM = 2300 3200 (depending on manifold pressure)
Vehicle speed = 10 km/h (6.2mph) or faster
ECT = 10°C (50°F) or higher
Engine Load = Judged by intake manifold negative pressure

[F20A CB7]

VTEC engagement has certain parameters that must be reached in order to operate. It doesn't just switch on at the exact same RPM all the time. It may seem like it does but it does engage according to certain conditions the ECU receives.

H22A1
RPM = 4900 and higher (depending on manifold pressure)
Vehicle Speed = 30 km/h (19mph) of faster
ECT = 60°C (140°F) or higher
Engine Load = Judged by intake manifold negative pressure

F22B1
RPM = 2300 3200 (depending on manifold pressure)
Vehicle speed = 10 km/h (6.2mph) or faster
ECT = 10°C (50°F) or higher
Engine Load = Judged by intake manifold negative pressure

I never heard of a vtec kickin that low on the f22b1. The lowest I always thought was 4000rpm, gotta give it time to build oil pressure with the solonoid

I'm prolly wrong but hey

[NAiL05]

its an economy vtec it doesnt have to kick in high.

[alkoholikwun]

yea can anyone else confirm the low vtec rpm for the f22b1, just curious.

[GhostAccord]

If you require any further proof you could get yourself a copy of the Honda Shop manual. It's covered in section 5 pg7.

[TristansCB7]

Its a cluster and a hazard, #@%* it.

[CB7Man]

The main concern is at too low of an RPM, the high cams will not all engage at once, possibly damaging components...
It takes X ammount of pressure to keep the High Cam Pins engaged.
Anything below and you risk partial engagement or intermitant engagement
I would think that when the engine is turned off (with the switch still on) that the Vtec losses pressure and the pins disengage. Right?
It cant ALWAYS be in VTEC.