I have hte 05 6MT as well. I am highly interested in the MREV2 w/spacer, but I dont want to have to worry about running lean. Is the UTEC a must with this to do this safely?

 

From my understanding correctly.

MREV: For 05-06 Revup motors (300bhp). It includes 03-04 (287bhp)stock Lower Plenum and 5/16" Spacer kit. This was offered as a package.

MREV+: Originally designed for 05-06, an improved version of the MREV. Same as the MREV package but the lower plenum has been modified aka machined to improve better performance. However, Tony from Motordyne tested it on 03-04 cars and they shows good gains as well.

MREV2: A more refined version of the MREV+ where there're extra machining done to the lower plenum. However, not offered as a package anymore. Just only the machined 03-04 lower plenum. This is being offered individual and not a package is because it's suitable for BOTH 03-04 motors and 05-06 motors. Whereas the 03-04 folks already have the spacer kit and just want to get the lower plenum done.


So you have an 05-06, you'd want to get the MREV2 AND the spacer kit if you want to squeeze more power out of it.

Someone please correct me if I'm wrong.

 

That's my basic understanding of it as well.

Does anyone know what "machining" was done, or is it a secret...

 

You can totally tell when you get the plenum back.. Not sure if it is a secret or not but its pretty noticeable.. Makes a huge difference tho!

 

If you have a REVUP it won't run lean. The newer ECU adapts more readily than the prior version.

 

Thanks for answering my question, the most informative post I have read since joining the forum.

 

Ok. So I have a 06 Coupe AT (non-revup i presume). According to http://www.g35parts.com/9083/osc/pro...roducts_id=364 the MREV2 does work for non-revup engines. Can anyone verify this?? If indeed this is true, what is the probability of the car running lean with the 5/16" spacer? Finally will the ECU be able to adjust in time without upgrading to a new ECU? Thanks alot guys.

 

Finally this was the thread I have been looking for. I have gathered that the MREV2 plus the 5/16 spacer is the way to go BUT what about the MREV2 and the crawford plenum? Does the crawford hinder the power of the rev-up motors, or will it have the same affect in-terms of power as the spacer?

Oh one more thing I was searching sites and came across the Skunk Works 5/8 spacer.... has anyone tested this this spacer with the MREV2?????

http://www.g35parts.com/9083/osc/pro...roducts_id=298

 

You have several good mods but you can only know if you need a tune by getting a dyno with a A/F readout.

And no matter what it is, you can only improve performance with a UTEC. If you do indeed get a UTEC I will also suggest getting test pipes (if they are acceptable to you). The test pipes are the last good bolt on you can do.

And if you wrap it all up with a UTEC tune, you are as good as it can get without going nuts on internals, N2O or FI.

You are just about done with the NA mod sequence.
Tony

 

You can use the MREV2 no problem.

If you combine it with a spacer, the chance of running lean is approximatly ~1:5.

But you will have a better knowledge of where it will go if you already have a dyno.

 

Performance of the Crawford plenum will be very similar to the spacer. In fact, it is most similar to the 1/2" spacer in terms of performance.

For area under the curve though, I have found there is a optimum plenum volume achieved with the 5/16" spacer.

The 5/16" spacer doesn't make the highest peak power, but it makes the most area under the curve. In other words, it makes the highest "average" gain.

And this is why I recommend the 5/16" spacer with the MREV's. A higher average gain.
Tony

 

Thanks for all of those replies Tony. You are a great man and company to deal with.