OK im sick of getting different anwsers. I need help. I want to do the whole spacer/plenum thing.

I have a 2006 5at with 2500 miles. What will add the most. I am going to be putting on a popcharger in the next week or so.

 

What do you mean by what will add most? All you really need is the spacer then you can retain your stock strut bar. I am going to do the Motordyne spacer next spring when my Z comes out of storage.

If your asking if the spacer will add more then the pop charger yes it will.

 

I mean with like the Mrev2 and the 5/16 spacer

 

Well you're in luck! I have recently spent a lot of time researching the combination of intake/plenum mods. I have spoken several times with Tony from Motordyne and here is his response:

Tony's response to installing the lower MREV 2 and 5/16" spacer:
"Installing both won't increase peak power much, but it will increase the average power and area under the curve. Doing both will increase it by
2-6 HP in various parts of the curve."

The major gain will be from the plenum spacer. If your has a strut tower bar like mine, stick with the 5/16" spacer as it will clear the strut bar. The miniscule increase with the 1/2" spacer is not worth losing a great suspension component. If you don't have the strut tower bar, obviously get the 1/2".

The MREV 2 is basically the lower collector bored out for better air-flow, how much is hard to say....the dyno's on the motordyne website show the gains.

I would save your money and install the pop-charger and the 5/16" spacer (w/ strut bar) or the 1/2" spacer (w/o strut bar). I can't imagine a major increase in hp or feeling when installing a $446 lower collector.

My planned setup for my 06 Manual Grand Touring will be the 5/16" spacer and the Stillen intake.

 

Sorry to say but you will always get different answers.

For the best dollars/horsepower, go with the modified lower plenum.

 

if the you had a revup the gains would be worth buying a mrev2...not trying to knock tony's sales but you only really need a spacer for the non revup motor....just my opinion feel free to prove me wrong

 

Best thing you can do is call Tony and ask him directly. You'll always get diff. answers here due to the confusion over what parts do what on the non vs. rev-up motor.

 

With all $ invested in NA mods, why not go single turbo @ low boost if you really want the power

 

Man, the answers are out there...could do some more research!

 

mrev2 by itself, since you have non-revup, is the best bang for your buck period. there is your clear answer.

Also note that to get the most out of ANY mod you need tuning. The stock ECU just doesn't cut it when it comes to delivering max power.

 

Always said by a person that hasn't boosted this motor yet.

The cost of NA parts/hp vs FI parts/hp, FI always wins on paper. People tend to overlook:

Cost of labor
Tuning
Dyno time
Higher potential for problems, breakdown
Additional parts needed to monitor the kit
Additional mods to balance the car for added power.
Cooling

I went from T'netics ST to NA with spacer, MREV2, and Exhaust. Although slower than turbo, car is still quick and pulls hard. I worry less about my car now and actually want to drive it more.

 

turbo is to much money/worry/and work..im not looking to add a lot..just a noticable difference then stock

 

best mods to stay na without spending a wad of cash is

mrev2 +spacer
hfc
exhaust
pop charger
and a tune
maybe a ur pulley

 

Well said, good advice for people who think a turbo kit can be "slapped on"

 

Just for clarification, this is the case on the NON-REVUP engine.

OTOH

With the REVUP engine, it makes much more gains, and both the spacer and MREV2 are recommended to be used together.

On the REVUP, the MREV2 makes TQ and the spacer makes highend HP. Both together give very good results.

 

well hydra, what should i do in your opinion?

 

It depends on your short/long term goals. Will you be doing mods once on your car or do you envision building up your car over time?

Will you keep it simple or will you go crazy on building it up? Will you ever tune the car or get a reflash? Do you do your own installations or send it out?

Everybody has different goals and budgets so I try to help optimize the value and results for what you want.

 

what about non-revup? Does the MREV2 really provide more power than the 5/16 spacer? I thought they both give the same power.

 

They give similar but slightly different results.

Although subtle, the spacer give a little more peak power and the MREV2 gives a little more TQ and average power.

 

These plots show exactly what the differences are.

Please ignore the names shown on the top of the plots. I did this development testing before I finalized the name to MREV2.

You may need to toggle the link a few times to get it to display. There is something wierd about showing these links from this forum. Hit the refresh button and it displays.

Note how the differences are subtle, but they are there.

http://motordyneengineering.com/images/April_31_Plot_1.gif
http://motordyneengineering.com/images/April_31_Plot_2.gif
http://motordyneengineering.com/images/April_31_Plot_3.gif
http://motordyneengineering.com/images/April_31_Plot_4.gif
http://motordyneengineering.com/images/April_31_Plot_5.gif
http://motordyneengineering.com/images/April_31_Plot_6.gif