Does Anyone Know How To Make A Vtec Activation Switch
08-Jun-2003, 06:15 PM
#1
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Does Anyone Know How To Make A Vtec Activation Switch
i need help making and installing a vtec activation switch my brothers car is running on a PR4 computer and he has a b16 the motor is hooked up is there anyway to wire the vtec to an in car switch so that it will be engaged at 5000 rpm??
pretty much i want the cams to switch over once the activation switch is engaged.
let me know and thanks for the help
pretty much i want the cams to switch over once the activation switch is engaged.
let me know and thanks for the help
08-Jun-2003, 09:14 PM
#6
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man i dont want to mess with vtec engagement i just want vtec and being though he has a GS computer there is nothing triggering it to switch to the vtec cam.. understand.. so i need something to trigger it to switch.. (to send a signal to the vtec soleniod to switch cams..) let me know how to do this..
thanks
thanks
09-Jun-2003, 09:10 AM
#7
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I believe Moroso has an RPM activated switch.
You can also try a shift light. Just rewire it so it triggers the VTEC solenoid instead of the light.
You should get the correct ECU for it though (PR3, I think) since it will change the fuel and timing once VTEC is activated.
You can also try a shift light. Just rewire it so it triggers the VTEC solenoid instead of the light.
You should get the correct ECU for it though (PR3, I think) since it will change the fuel and timing once VTEC is activated.
09-Jun-2003, 01:30 PM
#9
The man is right... unless you richen the mixture, you are really gonna **** yourself. There is a reason why Honda made a separate computer for the VTEC motors. loudsubz is right too... they tested that ****, so unless you got cams and severe head work, I don't know why you'd be doing what you wanna do. donesixer, the shift light pills would be a good way to do it, if the maps were correct for the fueling... but they are not.
09-Jun-2003, 01:56 PM
#10
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I agree, the rpm switches are definitely a ghetto rig. That is why I recommended the ECU in my original response.
At the same time, the computer will sense the change in vacuum and change the fuel delivery accordingly. The VTEC crossover occurs in closed loop operation. The fuel is added and the ignition is advanced only for performance, not reliability.
You can run with it ghetto rigged for as long as you want, you will not get all the power that is available, however.
Oh, good way to **** things up is to engage VTEC too early. Oil pressure is to low to get a full engagement. You'll get rocker arm stew eventually...
At the same time, the computer will sense the change in vacuum and change the fuel delivery accordingly. The VTEC crossover occurs in closed loop operation. The fuel is added and the ignition is advanced only for performance, not reliability.
You can run with it ghetto rigged for as long as you want, you will not get all the power that is available, however.
Oh, good way to **** things up is to engage VTEC too early. Oil pressure is to low to get a full engagement. You'll get rocker arm stew eventually...
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