Me too. Did you already order one?

 

Nope. Doug and I did some research.

 

Some people are easily predicted.
.

 

And?

 

We are not trying to copy it becuase we dont find it beneficial to our needs.

 

I am not trying to dick MD out of money or make them lose business. All we did is have a hunch on what it was, so we tested it out. I posted a thread with dyno runs and a detailed description of the mod. Do a search, it is not that old.

 

That's cool.

 

That part you tested wasn't modified and that's probably why you didn't get the same results. Do you not believe the 2 Dyno's that were already posted?

 

diesel- balanced has a dynojet
http://www.balancedperformance.com/services.shtml

tony- check out these guys n2o/propane setups for the vipers.....
http://www.btrviper.com/nitrous.html
the srt-10 we installed it on used a nitrous express wet kit with propane instead of gasoline. we used two jets, one about 6 inches infront of each butterfly on the tb. both botttles were mounted in the trunk. the kit came with 3 sets of jets for the n2o and propane. the biggest power set put down about 630hp and over 750tq on a dyno jet. it was pretty slick. we watched it with a wide band o2 sensor and everything stayed safe.

i dont have a revup engine and i realize that my 287 motor wont realize the potential of this mod, but i have been reading this post the whole time and want to know. i like what you are doing and want to see what some out of the box thinking can do for these engines. i plan on ordering a thermal kit and spacer pretty soon and hope there is much more coming down the pipe........
keep up the good work and get a quicker web designer

 

thanks, i saw the other thread, and i gather you guessed correctly. not sure i want to bastardize my engine though, and possibly negate future upgrades from as yet to be released products under development, such as IMs, intakes, etc., which could stand to increase the top end hp.

 

Wow! I would have never guessed. I've seen its violent potential and never would have guessed it could be harnessed in a reciprocating engine.

Thats cool but I personally won't be trying that chemistry in my engine. That mix burns very fast and hotter than a M.F.'r.

I'll try an alternate chemistry thats a bit more benign.

 

Am I the person here who thinks its LAME AS HELL that these guys don't just say what the product is that they're selling??, I mean whats the big secret?? I can't believe you guys are sending your money off just with no exact knowlege of what your getting in the mail. I mean, I obviously this mod of theirs works which is great but still, its just good business to at least let your potential customers know what the heck it is that your asking <$500 for.

 

What it is has been released do a search!

 

frankly, no, i won't do a search. as far as i'm concerned, if someone wants to keep their product a secret and just tempt potential customers w/ a tidbit here and there, he can keep it. i have better things to do with my life.

 

+1

Lou

 

24v GTI Guy and Undrgnd,

I didn't intend it to take this long. I thought website development would go much quicker. Everybody who ordered one knew what it was before they ordered it.

Not only I've been dropping hints all over the place, several people were able to correctly call it out based on detailed description of the performance and dyno plots. I'm surprised more people don't figure it out.

Heres a hint.

I knew what the results would be before I even dynod it... It knew the moment I saw the REVUP 300HP collector dynod on a 287 engine.

The REVUP collector on a 287 engine showed a significant loss of power everywhere except the last several hundred RPM where it produced a only blip of ~10HP at the end of the RPM spectrum. Upon seeing the results I asked myself "Why would Nissan do that?" It looked like such an unfavorable compromise.

Even a 1/4" plenum spacer could easily produce greater gains above 5K and have no absolutely loss of HP and TQ everywhere else in the curve.

It seems the new REVUP collector was more of a marketing decision rather than a engineering decision. It does allow the REVUP engine produce a higher peak power and allows Nissan to legitimately advertise "300 HP". And this is what led me to believe it is more of a marketing decision. HP is what matters most to sales and the marketing department. Peak HP is what gets advertised in the magazines. Particularly when all the car companies are in a HP war. The old adage is true. HP is what sells cars. TQ is what wins races.

Nissan is in the business of selling cars. Winning races may be nice but its not Nissans primary objective.

I give special credit to JASON@PERFORMANCE NISSAN. He was the first to post an A/B comparison of the 287 HP lower collector against the 300 HP collector on a 287 engine. That is when I saw the TQ and HP on his pre/post plots. I found that if you extrapolate the plots out to 7000 RPM, the compromise between the 287 collector and the 300 collector becomes more even in terms of total area under the curve because HP is rapidly diminishing above 6K... But I also know that adding a spacer to a 287 collector rapidly increases HP with RPM. See the attached plot below.

The question is. What if a 287 lower collector was dynod on a REVUP engine? You could expect more TQ and less HP. Would that be a desirable feature?... Only if it were a daily driver. There would be too much loss on the top end for tracking or drag.

But knowing that a spacer with a 287 collector rapidly increases HP above 5K. (see attached plot below.) At 6.5K it shows a spacer is increasing HP almost exponentially! If you extrapolate it out, it would produce nearly 18HP at 7K RPM. So this led me to questions what would the result be if a 287 collector and a spacer were combined and bolted to a REVUP engine?... This is where it gets interesting.

The 287 collector on a REVUP engine by itself would decline rapidly above 6K, but seeing that a spacer rapidly adds above 5K, it was surmised that positive and negative trends would tend to negate each other. But the only way to really know what would happen is to put it on the dyno and test it.

This is where Klumzyee and his REVUP G35 came into the scene. (Motivated by an offer of a "Free MOD" if he got it dynod.)

His baseline dyno was done for reference at the beginning of the day.

The First experimental test was simply a 287 collector on the REVUP engine. No other mods.
Results: Exactly as predicted. Much more power below 5.5K and a significant loss of about 20HP above 6K.

The Second test was a 287 collector and 5/16" Iso Thermal Plenum Spacer on the REVUP. No other mods.
Results: Much more power below 6K and a loss of about ~6HP above 6.3K. It was interesting to note that TQ was down very slightly from the 287 collector alone but HP in the high end was up substantially.

The Third test was a 287 collector and 1/2" Iso Thermal Plenum Spacer on the REVUP. No other mods.
Results: A mixed surprise. Yes, it produced about 2HP more peak HP in the high end than the 5/16" spacer but it also produced less total area under the curve than the 5/16" spacer. It lost quite a bit of TQ across a wide range of RPM.

Conclusion: Of the 3 configurations tested, the 5/16" spacer clearly produced more area under the curve than any other configuration. Its max TQ was only slightly less than no spacer at all and its max HP was only slightly less than the 1/2" spacer. Despite the fact that it didn't produce the highest peak TQ or the highest peak HP, 5/16" produced more power across a wider range than anything else. And it produced a lot more power than the stock REVUP collector. When you consider the trade of power loss above 6300 Vs the power gain below 6000, the modification produces a 12:1 gain in TQ and a 7:1 gain in HP. (a really good trade.)

If the 5/16" spacer produced more overall power than either configuration, it is indicating there is an optimum point for spacer heigth.

This observation is what indicates how plenum internal volume (and not just total flow area above runners 1&2) are important to the REVUP engine. Plenum internal volume has an optimum point. More volume isn't necessarily better. This observation also suggests engine performance is sensitive to the plenum internal acoustic resonance frequency.

But then again, I also know that runners 1&2 by themselves can benefit from the added flow area of a 1/2" spacer. So after analyzing and reviewing the data from Klumzyees dynos I thought of other ways to possibly increase power even more.

And this is where a modified lower collector came in.... Its essentially an attempt to try to get the peak gains of the 1/2" spacer and keep all the TQ of the 5/16" spacer.

I think what the engine ideally wants is a minimized plenum internal volume with a maximized clearance above the intake runners. So I tried to move toward this goal by modifying the lower collector.

The modified lower collector with a 5/16" spacer was tested on Alex's car a little more recently. You can see both Klymzyees and Alex's dyno plots on the first page of this thread.

The modified lower collector can be used if you don’t want a spacer at all and want the maximum stealth possible (but it won’t produce quite as much as the spacer). Conversely, the modified lower collector can also used in tandem with a spacer for additional breathing room above intake runners 1&2.

So there you have it.

MREV is a 287HP lower collector with a spacer... with an option to modify the 287 collector to squeeze a little more power out of it, or to just keep it 100% stealth.

Tony

 

so Tony with the modified lower collector + 5/16" spacer, roughly how much power is lost past 6300rpm compared to stock 300Hp?

the last thing id want as a 300hp owner is that same feeling as the 287hp, where revving it past 6000rpm seems pointless and doesnt pull any harder

 

fair enough. how much for the top of the line option w/ the modified plenum, and how long a wait?

 

You can see Alex's dyno on the first page. I havn't done an analysis on it yet.
I figure if Klumzyee has that good of gains, anything more is just gravy.

And because the lowest I've ever measured on it was 15.8 HP, I'll advertise it as a 15+ HP mod.

 

Its $487 for the Iso Thermal MREV. There are options like the modified collector $100 or the Copper TB heater $70.

And even though the website isn't up yet, they are shipping out now. Just give me a PM for more info.

In fact, several have been sent out to G35 drivers on the G35 board.

Several independant reviews have already come in and all of them are . Independant dynos will be comming very soon too.

So far, one 350Z owner (Diesel350) has made a purchase with the $100 discount to get it installed on the dyno. And he will post his results.

So there are two more $100 discounts to anybody who can get MREV installed while on the dyno and pre/post tested.

Tony