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04-06 Ralliart Engine/Drivetrain (no forced induction)

dual mivec

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Old May 14, 2008, 08:55 PM
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Lightbulb dual mivec

i figure, if we can change the system to make it work by solenoids hooked up to a V-MANAGE controller, and using a laptop. we can not only make it activate electronically but dual as well at what ever rpm choosen. serious helpers please.

DO-MIVEC

dual
output
mitsubishi
innovative
valve timing
electronic
control system

check out the v-manage for yourself and see why think its d best choice to do ths with.

http://www.hopupracing.com/grvfcosh.html
Old May 16, 2008, 01:11 PM
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the 4g69 mivec is primarily hardware controlled. the software portion merely turns it on or off. I don't think it applies to this technology, hence the evolution denotation.
Old May 16, 2008, 06:15 PM
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i think that might actually work
Old May 16, 2008, 07:47 PM
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why is that? I must not be understanding correctly then
Old May 16, 2008, 08:11 PM
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that should work...
Old May 17, 2008, 11:37 AM
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dan click the link and carefully read through how this thing works. our mivec is same as evo just different engine and our ecu can be tuned for the mivec. the only thing to wonder is will it plug into ours? never seen an evo so dont know if the plugs are the same or not.

all it is, is fine tuning ur mivec of when to kick in and boosting the power of ur mivec. like how hondas get their ecu reflash for their v-tec
Old May 17, 2008, 07:38 PM
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Originally Posted by akira2_03
dan click the link and carefully read through how this thing works. our mivec is same as evo just different engine and our ecu can be tuned for the mivec. the only thing to wonder is will it plug into ours? never seen an evo so dont know if the plugs are the same or not.

all it is, is fine tuning ur mivec of when to kick in and boosting the power of ur mivec. like how hondas get their ecu reflash for their v-tec
The 4G63 MIVEC system is not the same as our 4G69 MIVEC system. They do different things and are controlled differently. A MIVEC controller for an Evo will most likely not work, or come close to working, on our engine.

Also, our wiring harness is completely different, so that won't plug in.
Old May 17, 2008, 10:45 PM
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would our engine begin SOHC and most other variable enabled engines, i.e. 4g63 and h22 being DOHC affect this at all?

Other wise wouldn't it be possible to splice the wires from the evo harness to fit the RA?
Old May 18, 2008, 07:22 AM
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:sigh:<-where is that smiley?

4g69 mivec:

controlled by oil pressure, RPM. ~3600 RPM if oil pressure is ~43psi or greater the ECU cuts a signal to the oil control valve. the valve opens and allows oil into the exhaust rockers. each exhaust rocker has two valves on it that are pushed closed. the valves are in such a position so that they interfere with the Mivec lobe rocker. being much larger than the other two lobes the Mivec lobe rocker forces the valves open a much greater distance, and now instead of the high end lobe being idle the low and mid range lobes are idle.

where in this process do you see any variables controlled by the ECU? yeah, you can change where it kicks in, but too low and you exceed the fuel maps ability and need a way to tune around it(if it doesn't cut fuel at ~5000 because of the error) and too high and the oil pressure sensor trips a CEL(again if it doesn't cut fuel at ~5000.)

anyone willing to try, feel free. you never know until someone actually does it. if you are looking for anything but an on/off lobe changeover forget it; that's all this Mivec system is.

EDIT:yes, the SOHC is the main reason this Mivec system can only control when the changeover occurs. and since no one has bothered to mess with our ECU yet we can't even control that yet

Last edited by DangerousDan; May 18, 2008 at 07:25 AM.
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