Ok as you can read in my sign. i have an 03 6MT coupe. Im getting the 5/16 Iso spacer, i read that the MREV2 is for the REV-UP engine and I have the NON REV-up engine. Is there something like the MREV2 but for the NON REV-up engine??

 

from my understanding, you will be okay running mrev2 on your non revup.

from what ive read/learned, youll only run lean if you run the mrev2 + 5/16 spacer combo on non rev ups.

basically, if im right, then for us non rev ups we have to choose between mrev2 and 5/16

we can get both but we will be running lean in which case a tune wil fix that.

im a non revup and i have a 5/16 spacer right now. i love it. i will be getting the mrev2 as one of my last mods (right before i tune it).

 

so what does running lean mean?

 

running lean means you're getting too much air with respect to fuel. that means that your injectors are not providing enough fuel to make the car run optimally at around 12.8-13 AFR (Air-Fuel Ratio).

So what the MREV2 and 5/16" spacer does is provide better breathing to the engine. The MREV2 is basically our Lower Plenum (i.e. Lower plenum for 2003 and 2004 models) with more metal shaved at the intake runner number 1 and 2, i believe (someone correct me if i'm wrong). Thus, you're breathing in more air but your fuel injectors are not making up for it by providing MORE fuel because you have not tuned it yet. That's why aHero says a tune is necessary which is entirely true. And that's what it means when you run lean.

So for non-revup motors, we CAN run both MREV2 and 5/16" spacer but we'll be running very lean. But the Rev-up motors SHOULD be runnng both MREV2 and 5/16" and they won't need a tune.

Understood?

 

^^good explanation

 

so what are the advangtages to getting the MREV2 and 5/16 spacer plus the tune up for the NON REVup engine?

 

i would think, and someone with more knowledge can correct me, you could get much better gains because you're increasing the flow efficiency of air to your engine and getting a tune that keeps your engine running optimally at around 12.8-13.0 AFR will give your car great, great gains. just getting a 5/16" spacer alone with a tune will do you great justice, but getting the MREV2 as well will be even better I think.

 

I have 03 6mt cp. Took out motodyne spacer and repalced it with mrev2 lower plenum. Same performance, stealth look and no problems.

 

About how long does it take to install the MREV2? I was debating between the two myself. I was reading the service manual, and the only part that freaked me out was the part about having to perform a Throttle-Position-Learn.

 

to just install the MREV2, i think it would take an hour tops....for a first time install, give yourself 2 hours to learn all the bolts and to carefully re-torque everything back to spec.

 

So I don't need to do a throttle-position learn, like it says in the service manual? (I think you need a Consult-II to do that).

I remember someone saying a battery disconnect was recommended on the spacer install, but mandatory on the MREV2 install. Is it to prevent having to do a throttle-position learn?

 

what's a throttle position learn? is that like an ECU reset?

 

The throttle position learn is not a ecu reset but rather, its a calibration procedure. But it is very rare that you will ever need this.

It predominantly happens if you disconnect the wiring harness from the throttle body while the battery is still connected. The other way it happens is if you manually push the throttle body butterfly valve open by hand.

But as long as you disconnect the battery before the install and don't push on the throttle body butterfly valve, you won't need to do the relearn procedure.