i just got my ralliart on friday. anyways the mivec kicks in 1,and 2 gear but on 3 and up it start slow down a lot does anybody know why?

 

Huh? How can you tell when the Mivec "kicks in"
I know I can't hear it. Most cars start slowing down in 3rd gear anyway.

 

MIVEC kicks in at 3500 rpm, so if you're shifting fast and keeping RPMs above that then you're not going to feel it kick in, because it's already there.

 

i uses to own a civic ex and 93 gsr that have vtec and you can see and hear the vtec kick in,but i look at my rpm's when it's on 3500 it slowy clims up on my ralliart.

 

The MIVEC is not the same as VTEC, mivec is desgined to not have the kick
it's supposed to be smooth transistion(sp). Nothing in my oppinion will ever have a kick like the B18C or C5.

 

What slowly climbs up? The power? Well it isn't as though you have no power before mivec and maximum power after mivec. The horsepower band moves up pretty smoothly from idle all the way to redline. There isn't a HUGE jump when the valves change.

 

MIVEC has more switchover points then VTEC, so perhaps the transitions aren't as big as the one point old school VTEC is.

IMO all of them are subtle. You may call a Type R or GSR having a kick, its barely noticeable to me. Even in the S2000. A "kick" is a turbo that hits full spool at say, 3000 RPMs. Try to get somebody to give you a ride in a 20G or 50trim equipped DSM and you'll see what I mean. Variable valve timing, whoever the manufacturer, will seem tame afterwards.

 

I've said it before and I'll say it again. All the lag, none of the boost.

VVT is cool, and certainly neat technology, but I've yet to experience pull even comparable to running 5lbs of boost in a Lancer. Good way to eek out extra power from a NA motor, but not a good way to make a lot of power imo.

 

No, mivec has ONE switch point. However there are 3 valve positions. 2 DIFFERENT valve positions are used from idle to 3500rpm. So one valve is opened a little and the other is opened a little more. This is for high swirl in the combustion chamber. After 3500rpm, BOTH valves get engaged on the agressive cam lobe (the 3rd position). However the valves only change ONCE.

 

yes power, one of my friends has an srt-4 and i know how turbo feels like but i readed that you have to warm up the 4g69 so that the mivec would work, is this true?

 

if by warming it up, you mean rev the engine past the profile shift point, then yea, you have to warm it up. but i dont think thats what you are talking about. its an electronically controlled mechanical device. the electronics dont need to warm up. However, they may check engine temps before allowing MIVEC to kick in and swap cam profiles in high gear, but I never noticed this. it always happens as far as i can tell, even when just pulling out of my driveway.

 

I think you are thinking of the rev limiting of a cold engine. I believe the ECU prevents revving past ?5000rpm? when the engine is cold. I have never tried it, but I notice the transmission likes to get in the higher gears quicker when the engine is cold.

 

Very good, I misread the data I had on it. At any rate, as nice as the Ralliart is - it is by no means a "Type R." As in, the 4G69 is a workhorse duty engine for Mitsubishi and the last in a series before the World Engines from the DCX, Hyundai, Mitsu consortium take over. The engine sees duty in everything from sedans to JDM minivas and a lot in between. It would be interesting to see what Mitsu would have done with an "MR" version of the engine, but we'll probably never know. This would be the equivalent of the engine in the base Accord or CRV, and hasn't been tuned like a B18C or B16B, or even a Celica GTS motor. And like Hobie said, get yourself even a modest turbo setup, and you'll forget all about how high tech variable timing and induction is.

 

maybe i'm just used to hondas but i love my ralliart

 

yeah i drove my friend RA and you dont get the same feel...i have a K20a2 and you really feel it whenit crosses over to i-vtec