Intake & Exhaust Questions and info regarding various aftermatket exhaust systems for the G35 (Headers,Y-Pipes, and Cat-Back Systems)
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Keep 5/16" Spacer or change it out for the MREV++?

Old May 15, 2006 | 12:48 PM
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Keep 5/16" Spacer or change it out for the MREV++?

Title says it all.
 
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Old May 15, 2006 | 12:51 PM
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They do the same thing. I guess you could go Mrev II if you want 100% stealth...
 
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Old May 15, 2006 | 02:05 PM
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I'll buy your spacer if you decide to go with MRev++
 
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Old May 15, 2006 | 02:37 PM
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i just installed my mrev 2 and the first test drive..wow. my car seems to be more responsive and louder combined with my popcharger. it has meaner growl now. ive never been in a car with a spacer so i wouldnt know the difference but i love my mrev 2!!
 
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Old May 15, 2006 | 02:41 PM
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sry im a noob, u can't have 5/16 plenum spacer and mrev together?
 
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Old May 15, 2006 | 04:26 PM
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Originally Posted by mx22o
sry im a noob, u can't have 5/16 plenum spacer and mrev together?
runs lean if you have both. You need to tune it if you have both and that can cost you. Both run the same on the dyno so mrev 2 is a lateral move from the spacer.
 
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Old May 15, 2006 | 04:43 PM
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I removed the spacer for now...

Running with just MREV-2
The engine sounds smoother now. (better ballanced flow??)

The exhaust is a little quieter than with the spacer,
but has a smoother richer sound. I like it much better....
 
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Old May 15, 2006 | 05:24 PM
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thats a tough call..........from what it sounds MREV, but if you get it then you will be the first to know the answer to that question
 
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Old May 15, 2006 | 08:04 PM
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I know truplay...But damn i just got the spacer like 1 1/2 months ago too. How much you think i could sell the spacer for? Well the Mrev2 are still out of stock...Don't know when would Tony get some more orders in. I wondering if tony will still b offering us the intro price? I'm still thinking about the Mrev2 tho. You know how it feels when something new comes out...you just gotta have it n throw out the old one...lol
 
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Old May 15, 2006 | 09:59 PM
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Originally Posted by EZZ
runs lean if you have both. You need to tune it if you have both and that can cost you. Both run the same on the dyno so mrev 2 is a lateral move from the spacer.
It has been show that using both the spacer and MREV v.2 on a non-revup might cause the engine to run lean, but is this also true for rev-up engines? (the original MREV+ package included the spacer and modified non-revep plenum for rev-up engines and I don't think there was any negative A/F issues, so am I wrong for assuming the same w v.2 for rev-ups?
 
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Old May 18, 2006 | 01:29 PM
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I've been corresponding with Tony @ Motordyne via e mail and he says that it is okay to use the MREV2 and a 5/16 inch spacer at the same time on Rev up engines. He actually recommended doing it that way.

Oh yeah and MREV2's should be available again by early June. I wonder if we can get a group buy going or if we can still get the discounted introductory price??
 
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Old May 18, 2006 | 05:53 PM
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Originally Posted by mistercmed
I installed my MREV2 a couple days ago and I still cannot tell the difference. At first, it did feel like the upper end of the RPM's went by slower than before. I really didn't like that. Maybe it's because it provides alot of torque/hp starting at ~2k rpm (as seen on some charts) and I cant feel it because it progresses evenly through the RPM band (before it kicked in at ~4500rmp).
I have an 05 AT sedan. Mods before MREV2:K&N/z-tube/alphawerks headers/coupe middy. Side note: Several months ago I added Crawford cats to this set-up and the car felt like it lost tq in the lower RPM. I only felt a gain at above 5500rpm. When I took them off, I got my tq back and lost very little up top. But it still felt faster than stock. I wonder if now that I'm supposed to get more airflow/better power with the MREV2, I should try the cats on my car again?

Just my .03 cents with a couple questions
You must be running lean. That's why you didn't feel any gains with the cats.
 
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Old May 18, 2006 | 07:36 PM
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does your gas mileage go down substantially with MREV, MREV2 or the spacers? I'm wondering because I'm tryin to save the big bux on gas...but I would like the additional power..hehe
 
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Old May 18, 2006 | 08:17 PM
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Originally Posted by waterp7
does your gas mileage go down substantially with MREV, MREV2 or the spacers? I'm wondering because I'm tryin to save the big bux on gas...but I would like the additional power..hehe
After having installed the MREV+ and 5/16" spacer combo, my gas mileage did not decease. If anything, it got a bit better . . . As I had posted some 7 months ago. However, with the MREV+ installed, your car will sound pleasantly different . . . And as such, you will use more gasoline because the sound is quite addicting.

For you folks whom have the MREV+ and spacer combo currently installed, I will post up my comments in about a weeks time with regard to swapping out the MREV+ for the MREV2.
 
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