q for ya guys... got the MREV this morning... put it on this evening... thing went on like a dream... tested for leaks...none... reset ECU (pedal style) ((no lights were on anyway...just reset it for giggles))...BUT...haven't noticed any difference in TQ or power... have driven it about 15 miles...gotten on it pretty hard a few times... do i have to wait for the ECU to "learn" again? will the TQ increase over time? i'm not expecting a turbo or supercharger...but, 18+ ft/lbs of TQ should be felt, no?

 

I have the same complaint. It seems as if we were expecting too much, but heres the thing: i dont feel anything

 

18+ft/lb???? On a bone stock G?? Hmmm i dont know about all that. I just installed/dynoed the mrev2 on my 06 auto. It picked up about 8 ft/lb PEAK and hp was the same PEAK. It did pick up about 10 ft/lb throughout the midrange, and about 7 hp across midrange. My car is bone stock and auto, if yours is a 6mt, you may see like 15 ft/lb but thats the limit ( again this is assuming you are talking on a stock car )

 

quoted from motordyne's page:

"The Motordyne MREV+ lower collector! A universal stealth mod for use on any 350Z, G35, M35 and FX 35. When used with or without a spacer or aftermarket plenum, this modified lower collector will make substantial power gains.

Multiple independent test show when used with a 5/16" spacer on the REVUP engine, the combination will add at least 15+ HP and 18+ TQ in the upper midrange. Many independent REVUP tests have dynod in excess of 20HP and 30 TQ in the upper midrange and with high RPM peak power increased by 3-5 HP."

 

so if we dyno our cars, and it shows that it did not gain as expected, can we get our money back?

 

You have to combine the MREV with the spacer for full effect.

 

ok you do realize when you talk about peak numbers you have to hit the redline...the spacers make good power through the curve and that is dyno proven...the more breathing mods the better the plenum mods work...

 

ok, maybe i should clarify? i have MREV WITH 5/16" aluminum spacer AND ISO Thermal... it was a kit... and NO, the TQ and HP gains are not at redline... you actually LOSE HP at redline...and gain the TQ and HP in the midrange 4500K +... but, i've not felt any difference... maybe a bit more TQ at 4500, but nothing like 18ft/lbs... and this is supposed to be the minimum... methinks that this was yet another waste of money...

 

i respectfully disagree. i believe that the "peak hp" "peak tq" just means the highest point of a curve, wherever that point may be - not necessarily redline. I believe the confusion comes from the fact that on a stock rev up engine, the peak horsepower happens to coincide with redline. So people think peak=@ redline, but it doesn't. Also, "peak rpm" does mean redline. And "midrange rpm" refers to the middle of the rpm band.

For example, peak torque NEVER occurs at redline. After the mrev+ and the 5/16 spacer is installed on a revup engine, the peak hp increases a few hp as compared to the old peak, and the new hp peak occurs at a slitghly lower rpm, which means the higher hp is available sonner. As for the torque the torque peak increases a good amount (at least 15hp), and occurs at a lower rpm as well (at about 4500 rpm as compared to the old torque peak at 5000 rpm).

where you see the increase of 30torque, is when you compare the engine pre-and post mrev+ and spacer @ 4500 rpm. This is the new torque peak, but in the old graph it is not. In fact it is a depression in the graph. So when you compare the new peak tq number to the old depression, you see an increase of 30tq at that particular rpm, which falls into the "midrange rpm."

all that said, my personal experience with the mrev was that the torque made the car pull harder at lower rpms in higher gears. Like in 4th gear, the car used to have no ***** at 4,000 rpm, and now it actually pulls. Also, i saw the real world effects right away, i raced some unsuspecting 350z at freeway speeds and pulled on him with much less effort. (before the mrev i used to shift into 2nd, now i only needed to shift into 3rd and thus i didn't need to shift again as quickly). my only thought, is that while performance improved quite a bit relative to gear and rpm (faster acceleration in the same gear, faster acceleration at the same rpm), the maximum performance of the car didn't feel like it improved as much as I EXPeCTED (i.e. i feel I am in my powerband more often and for a longer time, but I feel like that power band itself is not that much stronger/higher). So the push in the back doesn't feel a lot stronger, but it lasts a lot longer, so I do better in races, but the sensation is not that much more thrilling.

i know I blabbed on forever. I apologize, I don't usually do this. Feel free to disagree with me or flame me. I'm curious to know what you all think.

 

the numbers do tend to peak out at redline...and it also depends on which motor you are talking about...the purpose of the mrev was to fill the lower torque loss due to the higher rpm motor...i think i just didnt explain fully. but what it comes down to is that the larger numbers that people get also have other mods and even tuning involved. remember 2 identical cars dont drive the same...and thats been posted many times about people breaking in their cars hard and having higher dyno numbers

 

The MREV w/spacer solves what I consider to be a fairly serious shortcoming on the otherwise awesome 2005/6 6Mt: Lack of tourque/power from 2 to 4.5K rpm (although after 4.5 even stock G's are screamers).

Echephron, you do have the Rev up motor, yes? if so you are the first person I have heard of who is unhappy w/ the MREV2....maybe ur ecu didn't reset....unplug the battery overnight and maybe that will solve the problem.

 

i have reset the ECU many times using various methods. It just does not work. It seems as though i have made myself think that my car is faster because i have just worked on my car for about 5 hours. I really need to dyno my car.

 

i have to agree with bigkrnxboi... it is a bit more torque-y at 4500K, but nothing like what i expected... and the AT still feels like it pulls much harder... oh, well... i'll chock it up to monies ill-spent... i guess if i want true performance, i have to get a true sports car...

 

how many miles do you have on your car, how did you break in your car, what kind of fluids are you using, do you have aftermarket wheels, do you have aftermarket stereo eq, how effecient are you with the drivetrain on this car...

 

echephron: Happiness is inversly proportionate to attitude and expectations. Hence you would be just as likely to be equaly dissatisfied with whatever you consider to be a "true sports car."

In any case, you should have pondered the nature of a "true sports car" prior to selecting an automatic transmission.