makes me more glad i didnt get the mivec, im stickin with my VIII RS

 

HA! I'm reading Turbo right now and they're showing products from SEMA 05: "HKS had another gem in its booth; a set of MIVEC Valvcon camshafts for the Mitsubishi EVO IX with an accompanying Electronic Valve Timing Controller..." Sounds pretty promising.

 

Looks like I may lean toward the RS VIII now because it will be a lot cheaper than a 06 too.

How do you like your's alloyic rs??
How are the mod's responding to it and what is your power goal??

Thanks!

 

oh its awesome, its an evo in its purest form, stripped of all comforts, i could even do away with the ac,
i just like a car tahts rough, agile (the evo is extremely agile compared to any other car i've driven) quick, and loud,
speaking of loud... i put the greddy ti catback on it, will soon be a full tbe,
my power goal? as much power as i can! what i want is a tune and my next big mod will most likely be the AEM EMS.
interesting that you're considering the Evo MR, big difference between the mr and the rs, be aware that the rs has absolutely NONE of the inside electronic gadgets that the MR has, but the RS also weighs less and definitely has more speed/race potential IMO

Good luck in deciding!

 

If Mivec is like honda vetch. it has 2 lobes for the intake cam. So, in low RPM it will use smaller lift and less duration. Then, it will switch over at certain RPM point or However evo IX ECU decides. so it is like you have 2 cams (one acts like stock evo 8 and one acts like HKS 280 .) I wonder MIVEC is acting like I-Vtech which controls the cam timming also.

 

Beats me

 

wrong read the link in my sig. It varies timing only. The cam lobes are fixed.

 

This is a pic from the Magazine on the IX Cams guys. Looks like soon, you will be able to have them for you too, controller and all.

 

i'm wondering why there needs to be a new cam design at all... how does the mivec sprocket attatch to the cam? it can't be that different than a cam gear right? why can't we throw the 8 cams in? this is very confusing.

 

I am amazed at the lack of info from a board this size.
I am still waiting on an answer in this thread.

https://www.evolutionm.net/forums/sh...d.php?t=176117

So far what we do know is the evo9 cams look just like evo8 cams. They do not use the variable geometry rockers on the evo mivec. Only the gear, which appears to be oil pressure controlled, is adjusting the cam timing.

The mystery remains as to how the gear is fed oil if the cams are hollow, which they are. The other mystery is to why no one has posted exactly why aftermarket cams wouldn't work. Cause it sure looks like they would. Maybe they do indeed bolt in, but just dont work well as they were not designed for variable timing?

 

Now that I think about it I think the problem is not that the evo8 cams aftermarket incuded don't bolt in. The problem is likely tuning. when you adjust an adjustable gear on the intake. you are not only changing cam timing, you are changing the ignition timing and injector timing as well. The cam angle sensor is mounted on the end of the intake cam. Ignition events are timed from the position of that cam.

What this means is tuning a mivec is actually alot more complex than on the surface. would be difficult to tune even with a AEM box.

 

4. MIVEC system

4.1 Purpose of MIVEC system

The MIVEC system provides the engine with intake

cams for a low-speed mode (in which the two intake

valves of each cylinder have a different lift) and intake

cams for a high-speed mode (in which both intake

valves have equally high lift), and it selects the cams as

necessary.

 

the mivec on evos is not complete... there is no lift adjusting.

 

The MIVEC on the IX shouldn't steer you away from a IX. A stock IX RS has the ability to hit high 12s stock and makes a lot of power with just a flash and TBE. Anyways, what I'm saying is if your in the market for an EVO right now, I would get a IX. If you have an 03-04 VIII, I would upgrade, but if you have an 05 VIII, I would just stick with it.

 

This is not the MIVEC system used on the Evo, this is the MIVEC used on the Lancer RA, IIRC. Look at the picture of the HKS IX cams above, you can clearly see that the intake cam only has one cam lobe per valve.