I have a question for anyone who might have one installed or maybe performed tests. Infact this might be better answered by kevin as he designed them. I'm comning to U.S.A in december, I plan on picking up an m2 intercooler while i'm there. Save me having to have shipped to uk cause I have to pay tax and vat which =27.5% I have read scudercarians site etc. But I need to know is there much difference between the two intercoolers. I'm aware of the fitment issues with the large one, pipings not apparently the best fit without a little tweaking, battery relocation or minimizing etc.. Basically I do not mind all that agro if there is enough difference between the two. But if heat sink is relativly the same, cooling similar, hp gain similar etc. Then why go through the bother of having the larger one when the medium works more or less just as good with alot less hassle installing. I have made up my mind and I do not want a greddy,pfs cwr, blitz etc Please only reply with specific to m2 intercoolers. I don't want a can of worms opened.

Regards

Brian Ellis

 

m2 intercoolers are really nice. Most people think that they are pretty much the same in cooling so if you want, go with the medium. The design of both of them is crap as far as the piping and intake ducts go. The intercooler itself is really nice and has a small pressure drop compared to the cooling effects! I just finished installing my large and I will post some pictures later when I get home.

 

Did you notice any issues with rubbing on your hood yet ?? What did you do about bad fitting pipes. Are the a little flexible so you can bend into shape a bit ???
I thought I had haerd that the duct was one of the better ones compared to other intercoolers, That must mean the others are really bad. Look forward to seeing the install.

Cheers Brian

 

I'm currently running the M2 Medium. Intake temps run around 29 C on a cool day. The fitment is bad though. It did rub on my hood though. I had to take the pipe from the turbo to the intercooler and bang it down a little to stop it from rubbing.

 

its not as bad as everyone says. i have a med and it fits fine. slight rub on the pipes.

 

There's only 1 problem with M2 at this point. If you wanna buy an M2 intercooler look at what some people are going through right now trying to obtain one:
https://www.rx7club.com/forum/showth...hreadid=119183

 

The pipes are metal and they can only be bent with a mandrel bender, if you want it done right. I had to cut the bottom off one of the pipes to make it fit under the strut tower bar. The other side went on pretty well but the intercooler is nowhere near the intake duct and I will show you this in the picture.

 

This is an interesting thread. I don't have any numbers right in front of me on the two IC's but the general story from when I first built them was that the core in the medium was actually more efficient by volume than the large. The medium core despite being smaller is actually more expensive to make than the large despite the size difference. In all honesty the medium should cost about $100 more than it does. The end result though is that the large is still more effective at cooling and pressure drop than the medium but not a directly proportional amount based on size. So if you want max effect the large is still the right choice.

What has me most interested in this thread and a couple others are the claims of horrible fit from some people. Anyone saying the duct doesn't fit you should probably ignore. The only thing I could possibly think of that would cause the duct not to fit is a different radiator or front clip. I've seen hundreds of the ducts and they all were a very nice tight fit with no variance.

As for the tubing it's possible if a jig got bent or was changed that all later versions of it would then be off by X amount which could also cause everything else to also be off by a little bit. The IC itself hitting the hood was fixed before I even transferred anything to M2. If it's still happening you might want to look at how the IC is positioned.


Kevin T. Wyum

 

I have the med. The duct fits perfectly but the ic pipe that connects to the greddy elbow rubs on the bottom of the hood just like everyone else's that has this IC.

 

The ducting fits perfectly. There are some 'cheaper' copies out there though that look the same but aren't nearly the quality.
John

 

Where's it rubbing? Front(IC) or back(Elbow) side and is it on the weld or something?

Kevin T. Wyum

 

Kevin T. Wyum, I e-mailed you about something, please check it and respond, thanks.

 

I have no problems with fitment of pipes or the air duct.
Fits like a condom.
I have the ASP Race (large) IC and FTL Intake and duct.

 

I have the re-designed M2 large... it fits good but the
intake duct sits a little higher on the right side. And running with the BMK battery the intercooler sits a little
toward the left side too... no big deal.

I had the Greddy stock mount before, I perfered the cast metal pipes of the Greddy than M2's thin metal ones, however next year I will get them ceramic coated.

jc

 

I had a M2 med first because of the RX7 project articles in Sport Compact Car Mag. It said that the smaller cooling fins and more in number (core), were more efficient at cooling because they were more per surface area and the pressure drop was less. On a later testing with the new large M2 (same core as the med M2 IC) the new was proven to be more efficient at cooling, pressure drop was I think the same as the med M2 and more resistant to heat soak. Now, I have the large new M2 design with the battery relocated. As far as the ducting goes, I have a Fluidyne upgraded radiator and still fits like a glove (like OJ's).
The pipes rub ever so lightly (with the medM2) but not a concern. Now, the lining up between the Greddy elbow, the pipes and the IC is another story. It really SUCKS. I had to get new silicone hoses with the bubble to have some flexibility and play to line them up. I must say that I also had the NEW REDESIGN PIPE it still did not lined up well plus now it was hitting the power steering bolt and it was not allowing the hood the close. No, I did not get a bad pipe, since I exchange that one and the new one was exactly the same. So, long story short, I cut down the lip of the bolt and banged the pipe into submission and now it only rubs ever so lightly the lining of the hood. Overall I am still very happy and the look is impressive. The battery relocation was also a bitch but I think is better for weight distribution and a longer lasting battery since it is not expose to the engine heat and vibrations.

 

Garfinkle bought his med unit from Kevin Wyum some years ago ,when he saw the large M2 unit , he called Brian at M2 to ask if he should sell the med size and get the bigger . The answer was if you have the 22 row and not the 18 row , keep what you have . He has the 22 row and it fits well but Gar made the rail it sits on adjustable. and he made the pipes.he runs a fan behind it the duct work fits well. The rubber trim that Vince uses at Performance Garage is better ,and Vence gave Gar that part.

 

I used to have the M2 medium. The intercooler core was very very nice, but the ducting didn't fit unless I cut part of it off. Also the pipe from the turbo to the intercooler was always banging against my hood and rubbed through the fireprotection. Of course I think it's completely random concerning fit. I've known some people to have it fit perfectly and others have it fit like ****.