it's the lower collector... the bottom part of your plenum.. the spacer goes between the upper and lower portion of the plenum...

The spacer ads volume, the MREV2 is a modified lower collector from non-revup to create better airflow to the intake manifold. They do 2 different things that work very well together for Rev-up... can be used together for non-revup but gain similar one or other on non rev-up...

I think your question might be does the spacer give same gains as MREV2 - in a nutshell yes on non-revup motors... one or the other have been shown to give similar gains... both together might give slightly more gains - but not nearly as much as what has been recorded on Revup using both.
Don't know if I'm answering your question - sorry if not.

 

yeah, i know what the mrev2 is, but im confused as to whats the difference from the mrev2 and the OEM lower plenum...does the mrev 2 add basically a 5/16 "wall" almost as though the 5/16th spacer is welded to the lower plenum? The only difference is that the MREV2 is one peice, but it would be the "same" as welding a 5/16th spacer to the lower plenum correct? Or is the design completely different?

 

I'm not trying to speak for Tony with details, however I think it's relatively known so I don’t think he minds the discussion... I don’t think it's really proprietary - but anyway when I said it's a machined lower collector from non revup - it's not a welded spacer, the inside surface of the lower collector has been modified for better airflow... I really don't want to be specific (this is Tony’s mod I have no business telling anyone details about it)... but the spacer is definitely a separate piece and functions altogether different than the MREV2. spacer = added volume, MREV2 = better airflow.

 

...look at the picture that i attached. Do you see what I’m saying? I know that the 5/16th spacer is a separate piece (i have one) and i know they don’t actually weld the spacer to the mrev 2. I was asking if the mrev 2 is hypothetically speaking a 5/16th spacer "added" to the OEM lower plenum to make up what would be called the mrev 2. Its hard to explain on here i would have to show you in person...or do you get what I’m trying to say?

-Sean

 

I understand your question and I've answered it a bunch of ways. No MREV2 is not lower collector and spacer. They are 2 entirely different things. MREV2 is a stock lower collector from a non-revup motor that has been modified - not by adding a spacer but by machining the inside surface for better airflow. I'm not sure how much better I can explain it - so if that doesn’t answer your question I'm stumped.

Edit: maybe the "2" is what is confusing you... the reason it is MREV"2" is that is has undergone 3 incarnations... originally it was just MREV, which was basically a stock lower collector from non-revup for rev-up only... then Tony did his magic and created MREV+ and now final version MREV2 - MREV2 actually is better than OEM even for non-revup but still have same theoretical advantages as previous for rev-up just better because of the machining that was done... as for the "machining" - yes I know what was done and so do many others so it's probably not a proprietary design - but I'm not going to elaborate because it's Tony's product and he can decide to the extent that info is released.

 

haha, i guess that answers it. I wasnt sure before by your responce if you understood what i was saying, i didnt even understand what i was typing. How is it machined different for better air flow? It appears to exactly the same as the OEM....

-Sean

 

read my edit in previous post

 

So as for the mrev2 and the OEM lower plenum..the dimensions are exactly the same, the only thing that’s different is the way the air flows then...correct?

-Sean

 

correct

 

Ok awesome, sorry for all the confusion...

Now for round number 2 -- How come it "only" works on the rev up motor? If the 5/16th spacer adds power to the non rev up then why wouldnt the mrev2 show any gains on the nonrev up or does it (the gains just are not as high)?

-Sean

 

After putting on the HKS muffler, I am not that pleased, I think I am going to order the MREV2 and spacer in a few weeks when the funds are replenished.

 

Dude, I answered this question in my explanations to your last question... I'm not trying to be a d!ck, but re-read the last several posts I made in reponse to you and if you take the time to really read them I think your questions will all be answered.

Here, I'll help:

 

HAHAHA sorry man im really bugging you. I forgot that we posted this far back.. but what i put in bold is what im confused about i dont know what you mean? So the gains are very minimal compared to the non revup is what im guessing...

oh well thanks for the help, tonys website doesnt give any "good" information other than the obvious. Thats why im confused as well i guess.

thanks

 

For the "non-revup" motor, using the MREV2 by itself has shown similar gains as using 5/16" or 1/2" spacer by themselves (one or the other, not both - don’t want to cause more confusion here)... Still considering "non-revup" motor, using both MREV2 and spacer (either 5/16 or 1/2) could show slightly more gains than using one or the other individually (personally not enough to warrant having both, but some people want that extra edge).

For the rev-up motor, using both MREV2 and spacer has resulted in significantly higher gains than using one or the other individually.

For the record, most find that the trq curve using 5/16" favors the 1/2" in combo with the MREV2 - but it's not a huge amount...

Please don’t ask why the combo works better on Rev-up than non-revup... that will involve the differences in OEM lower collectors of each motor.

 

I already knew mostly everything you said, but i was never really sure because i never had the chance to "discuss" it with anyone. I was just going off of what i read here and there and then putting 2 and 2 together. I for some reason just always thought that the mrev2 was a modified" 5/16th spacer and a lower plenum "molded" togather, but i guess i was way off on that. Thanks for all the help! I might try to get a mrev2 to add to my 5/16th spacer now that i know it doesnt serve the same purpose. Toy around with it and my AFC II a little bit see what we can get out of it.

-Sean