I would recommend getting the 5/16 spacer along with the MREV2. Should give you around 15HP.

"To a man with a hammer everything looks like a nail." -Mark Twain

This is from Motordyne's website:

you'd think they would want to keep their results consistant?

No, its not the best result we could come up with. There are actually many other dyno plots with better results the analysis could have been done on. I did the analysis on the "Import Tuner" test results because it is a independant test from a name everybody knows.

Quote, originally posted by evildky »

A single gear pull would show more info at higher resolution, a simulated grag is nto the way to measure a products results. Note they short shifted, what didn't they want you to see?

If you look at the dyno plots on our website, you will see that it does show all the results of all the gears.

Note, the plot analysis of the 1/4 mile graph is not a short shift.

Gears 1 through 3 go through their full RPM range. As done in a real race.

It is only 4th gear that it does not go to redline.... Just like a real 1/4 mile race, is not possible to cross the 1/4 mile finish line in 4th gear at redline. Crossing of the finish line occurs well before redline.

Quote, originally posted by evildky »

Note thats not a peak hp increase but the largest single gain in the any part of the graph.

Yes, and this is directly and explicitly stated on our website. In several parts of our website.

Quote, originally posted by evildky »

The actual peak gain appears to be about 5hp but they won't advertise that, it's misleading advertising. Pretty much everyone buying one expects to get that advertised amount at peak!

And that is why it is clearly said all over the website that the peak gains occur in the "upper midrange". It is also clearly illustrated and pointed out in the dyno plots. With text and arrows.

Quote, originally posted by evildky »

Note the hp and torque witht he spacer is less than stock above 6600 rpm.

Yes, it sometimes dynos that way. And that is why it is posted along with many other dyno plots on our website.

But in any case, the car is faster with the MREV2 and spacer.
Daily driving, 0-60 MPH power, 1/4 mile power, road course racing, or in a race to the speed limiter.

Quote, originally posted by evildky »

If something sounds too good to be true, it probably is.

Many times this is correct, but not always.

In this particular case, what is shown is true. And we do not ever mislead in the data analysis. (Only the facts.)

This is the latest independant dyno test.
http://g35driver.com/forums/sh...96688

Tony Colette
Motordyne Engineering

Modified by Hydrazine at 5:18 PM 1/12/2008

These are completely different tests on two completely different engines.

The MREV2 curves were dynos on a REVUP engine.

The Sport Z Magazine "Dyno Shootout" curves were done on a non-revup engine.

The two tests will necessarily have completely different curves.

thanks!

I must say I don't get why you would use a simulated drag race and post only hp numbers with no ET’s or trap speed? It seems the whole point of using a simulated drag race over a simple single gear dyno pull would be to show actual performance gains. If you want to show HP gains a simple single gear pull would be the easier and show higher resolution. Surely you have the data as to what the stock ET and trap speeds were as well as those with your spacer, please share those results with us.

You might disclose where the advertised gains occur but most people mistakenly believe they come at peak. I don't doubt that your spacer will add hp, I am sure it would help even more in combination with forced induction.

The new graph and article you linked are great. They post the peak hp numbers for each test which is the numbers most people think is being advertised.

Cliff notes;
MREV2 (retail; $399) + 5/16 ISO spacer (retail; $299) =

+5WHP ($698/5=$139.60 per whp gained)
about what I'd expect

fun with math, figure you can buy a 287 hp Z used for under $20k, $20,000/287=$69.69 per CHP, when you figure price per hp it would be cheaper to buy a spare car.......... and it's kinda cool that it worked out for the double 69

and for more fun.....
......a Turbonetic's 15134 turbo kit should get you better than 100 whp (I totally guessed here anyone got a hard number for me?) and costs $4670.95 at summit, divided by 100hp would be $46.71 per hp, a real bargain as the math shows us!

If you want to compare the MREV2/spacer to a turbo kit you can come up with different ratios of course. But this isn't a turbo kit. And a lot of people don't want turbo.

There is huge headache associated with forced induction. Especially on the VQ. To do a forced induction system right on the 350Z, you need to put in at least $6500 installed as a bare minimum. Realistically $10K+ to do it properly. And this isn't an exaggeration. Most reputable Z33 shops will confirm this.

There is so much more than just buying a $4500 turbo kit. There is a lot of supporting hardware that "should" be installed with FI if you want any reasonable measure of reliability. Then there is the installation, engine management and tuning.
If done by a reputable shop that can give good results and reliability, it costs $$$.
No exaggerations.

MREV2 is a easy NA bolt on that commonly yeilds 20HP/30TQ.
And the gains are predominantly in the upper midrange so its very usable power. And just about anybody can install it themself.

I don't know what it does for drag strip times, but I can tell you what it objectively does on the dyno. Countless independant dynos have been posted all over the internet to confirm this.

The lowest I've ever seen the MREV2/spacer dyno is 15HP/18TQ... Hence the minimum 15HP/18TQ rating. This seems like a reasonable, conservative and honest way to advertise the results.

If I wanted to spike the results, like so commonly done in this industry, it would be easy. But I don't.

My business ethic is.... Just bolt on's that work and perform as advertised.

Tony Colette
Motordyne Engineering

Modified by Hydrazine at 1:25 PM 5/16/2008

It is a plot showing the pre/post dyno results with the addition of the lines and arrows showing the power band (per gear) associated with 1/4mile racing.

It doesn't show what it does to the times in a 1/4mile race, but it does give you a good indication of the power gained in a 1/4mile race.

Tony

But a couple years back (and the offer is still open), I posted on several discussion forums the offer of a free MREV2/spacer kit for any "experienced" 1/4 mile drag racer to comparatively race test the MREV2 setup against stock.

The problem is consistancy. It will need to be an experienced driver with very good consistancy in both ET and trap speeds. And then they would have to do the test on the same day, same track, same gas and same weather conditions. Not to mention installing the mod while at the track.

There is one guy in particular I was hopeing could do it. Alberto. He's usually over on MY350Z.com. He has the skill to do it, but he doesn't have a naturally asperated Z either. He's FI. So he would have to use somebody elses Z for the test.

The catch... who wants to let Alberto whip their Z on the drag strip for several pre/post runs?
Even with the offer of a free kit, understandably, there have been no takers.

I tried to get this data some time back, but getting it is easier said than done.