MREV

 

Is your car stock?
I am just wondering what bolt-on can regain the lost in the top end.

 

Modification of the lower plenum produces good results to further increase the output at high RPM. This a dyno plot of the MREV with a modified collector.

The new Motordyne website has more details on what it is.

http://www.motordyneengineering.com/

Tony

 

basicly the usable power is shifted with this modification... to get the most out of your motor you will have to change your shift points...

shifting around 6500/6600 will be ideal with this modification to make the most out of the HP and TQ...

but, with this mod, low end power is greatly improved compared to the stock 300HP REV-UP motors spec's...

 

VDC guys, keep in mind, even with wide 19 inch wheels in the rear, shifting at 6500-6600 at WOT with the VDC off will break loose your real wheels causing the car to lose control. Shifting at 7000 rpm into the next gear wont allow the car to fall in the strongest part of the power band but you will still be able to have complete control of the car and still be able to feel the car pull tremendously up to about 6600 rpm.

My car was modified with the following mods in addition with the MREV mod when the dyno was done PRE/POST; JWT Popcharger, UR Crank pulley, UTR stainless steel headers, Crawford Cats, Nismo exhaust, Nismo Grounding kit.

This mod would not be ideal for guys who track their cars frequently due the power loss in the higher rpm range. You would want to utilize the RevUp motors ability to rev to 7000 rpm and use the extra HP that you get up top from the Rev Up motor. Though in my honest opinion, the HP loss up top is very minimal and does not feel any different with the Rev Up lower plenum. The amount of power you gain in the mid range definitely justifies the loss power up top for a daily driver. Adding the MREV to your RevUp motor will make your car a lot more funner to drive as a daily driver like myself. With all the mid range torque, it makes more sense to have that useable power in daily traffic conditions where you rarely would rev your car up to 7000 rpm, but you still have that option.

This mod makes more sense for someone like myself or other guys who daily drive their Z's. I commute 100+ miles a day from home to work and the car will hardly see the track during the year. If you do decide to go the track, you always have the option of throwing the Rev Up lower plenum back on.

 

<edited> Never mind...stupid question.

 

subscribing

 

Actually that's not true. Even with the MREV, shifting at 7000rpms is still ideal for the 1-2 and 2-3 shifts. Believe me, I've done the torque after shift calculations.

 

looking at it more, im agreeing with you...

 

Probably a dumb question, but any idea as to whether the MREV will work with the Crawford cast upper plenum (on the revup engine of course)....? I suppose a few of us will be interested to know, as a possible "upgrade"...thanks!

 

It could be done but it would result in a less than optimum plenum internal volume. Testing shows there is an optimum point where area under the curve is substantially affected by the plenum internal volume. More flow clearance above runners 1&2 is always better but increasing plenum internal volume is only good up to a point and the output starts to roll off again.

A 5/16" spacer worked better than no spacer at all. And the 5/16" also performed better than the 1/2" spacer. So far, a combination of the 5/16" spacer with a modification of intake runners 1&2 has produced the best results.

Using a crawford plenum will work but with results similar to the 1/2" spacer. Dyno results for this combination were posted by thawk. If you put the cast plenum on top of a 5/16" spacer, internal volume would move even further from optimum and it would not allow fitment of the stock strutbar.

 

Fitting the Crawford plenum alone already does not allow fitment of the stock strut bar, so that's not a problem I envisage. I have the Crawford plenum+strut bar waiting to be fitted... so are you suggesting that a combo could actually work well? (by combo I mean the full MREV set up-inclusive of the spacer-added to the cast plenum). In that case I would definitely be interested to see the results and would buy the MREV. Could you expand a little? PM me if you like...I'll do a search on thawk's posts in the meantime. Thanks!

 

One of the problems I see fitting the 5/16th spacer with the Crawford plenum is hood clearance. It may work it may not....

 

Anybody tried this yet??

 

Andy what size wheels are you running? I lost 20bhp going from going from the 18's to 19x9.5 19 10.5 GT-C. I am down to 249hp (crawford plenum, test pipes, injen1986CAI) have dynos if like to see. Might do this MREV if it works with the upper Crawford.

 

How about other bolt-on mods? Will MREV work with them? Or SC or Turbo?

 

Sure will.
In fact, I'm curious to see how it performs with FI when doing a pre/post dyno.

If you or anyone else would like to pre/post dyno it with a FI setup Motordyne will offer $100 off (to one person) if you can install and pre/post test it on the dyno.

The spacers do really good with FI so it would be reasonable to assume it would do the same with MREV.

 

I'm sure it could be done without the spacer at a cost savings. Were you interested in the regular or modified collector? Iso Thermal or Copper Iso Thermal?
Let me or Performance Nissan know via PM.

 

I am running 19x9/10.5 RH R5 PRO. They weigh in close to 27 pounds a wheel.

 

M REV ARTICLE