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baggins
19-09-2005, 04:49 PM
Help with my VTEC

I am a bit of a begginer when it comes to Hondas.

I was told the other day that i can get the VTEC in my Civic to kick in at a lower RPM. At the moment it comes in at about 5000rpm.

Is this true. If so how do you do it?

Thanks
Lukezen27
19-09-2005, 05:07 PM
Help with my VTEC

I am a bit of a begginer when it comes to Hondas.

I was told the other day that i can get the VTEC in my Civic to kick in at a lower RPM. At the moment it comes in at about 5000rpm.

Is this true. If so how do you do it?

Thanks

buy a VTec crossover point controller
http://www.ozhonda.com/forum/showthread.php?t=27471

Or a programmable ECU
tRipitaka
19-09-2005, 05:09 PM
vtec controller..
but i wouldn't mess with it if u've done nothing to the engine..
baggins
19-09-2005, 05:10 PM
How much am i looking at for that?
Does it just run straight through the computer?

Thanks
Lukezen27
19-09-2005, 05:11 PM
How much am i looking at for that?
Does it just run straight through the computer?

Thanks

read then link mate, it has the price!!

Not including tuning tho :rolleyes:
baggins
19-09-2005, 05:12 PM
oh yeh,

cheers
Lukezen27
19-09-2005, 05:13 PM
oh yeh,

cheers

Anytime :)
h22a accord
21-09-2005, 09:21 AM
the vtec in your civic actually does kick in at alot lower rpm than you think it does already. SOHC vtec has a different crossover point to DOHC vtec. sohc-low to mid rpm, dohc- high rpm.
Lukezen27
21-09-2005, 10:36 AM
the vtec in your civic actually does kick in at alot lower rpm than you think it does already. SOHC vtec has a different crossover point to DOHC vtec. sohc-low to mid rpm, dohc- high rpm.

Yeah mine kicks in round 4000RPMs if I boot it wooh :D
string
21-09-2005, 01:11 PM
Making it "kick in" earlier will only cause you to lose performance.

Stock crossover points are placed where the power curves of each cam profiles cross over, for a smooth change and maximum area under the curve.

If you want a slower car, by all means, change the crossover point.
Mike_
21-09-2005, 01:33 PM
you only wanna change it when you've done mods, as the power curves change. You should in that case change the engagement point accordingly.

Otherwise, leave it as it is for best performance
Sitwy
21-09-2005, 07:58 PM
no recommand to get vtec controller at this stage as u dun have any mod, it rather to spend the money on other mod first!
for a stock engine is no point to change the crossover point!
ECU-MAN
22-09-2005, 12:02 AM
no point chaning VTEC crossover unless you remap your ecu suit it, a VTEC controller only will change the Vtec point, it wont allow for the ignition and fuel trim changes that is required.
dundas
22-09-2005, 12:13 AM
if you want one. get it... if you get the VAFC, you will require a full dyno tune to get the fuel air mixture correect and the ignition crap etc... so may end up costing you around $800 all up.. why spend dat when you can get other things... :D changing the vtec crossover does feel rather cool :D like a VTIR-or type R when changed @ higher RPM than usual...but you dont gain more power even though it may seem so- the 1994 ACCORD VTI kicks in with VTEC nice and low @ 2500rpm-3000rpm.. das right.. but for 1st gear its a lil higher.. so for a sohc vtec im sure it kicks in quite Low-

anyways-- do what you want really LOL