I was thinking about getting the Rotary Extreme v- mount intercooler/radiator combo, but I am wondering how well it really works. Because the intercooler and radiator are at such an angle to the incoming air stream you would think they wouldnt be as efficient as one sitting in the upright position. The fins are situated for the airflow to come straight on at it, and with such an angle, I would think the air wouldnt flow throught it so freely. Anyone know for sure how well they work...

 

I have seen it on Tgriesel's car. The set up is amazing. One look and you would see why it wil work. the stock IC gets very little air in comparison.

I decided to go with water injection and keep my small Blitz SMIC. That means I get fast spool up, very cold air and my radiator is not blocked.

But I believe the V Mount is the best IC you can get, IMHO.

 

It's not the most efficient set-up - but it is arguably the best for the car in question - relative to what you want to do with it.

Very basically, you can't go wrong with it.

 

It's a great setup, everyone who's using it seems to love it, it allows considerate airflow to both the intercooler and the radiator. Try a search for V-mount, you'll find a lot of threads pertaining to this.

 

A lot of tuners in Japan have been useing this setup for a while. It's a pretty good setup.. all you have to do is think about all the air comming in your front bumer.. you can even duct the air so its all forced thru the I/C and radiator.

 

I have the setup and love it. Intake temps are low, coolant temps are low and there is just so much space. well there Isn't that much space. But a lot more then before. The good thing about the V-mount is everything gets cold air instead of just the IC on a FMIC or the rad geting part of the air and the IC getting some of the air on a SMIC. Once I install the shields for the IC im guessing the intake temps are gonna drop some more. Also a vented hood will allow better flow for the V-mount. This has just been my experiance. Im still waiting for the hood to come in. But once it does I will post the difference in intake temps.

 

If I were doing mods again, I'd do the V-mount setup, especially if you track your FD, like I do....

 

probably doesn't need to be said - but if you are building a strip car (or even a traffic light warrior) - stick to a fat fmic.

 

You can drag race just as well with a V-mount. Both provide excellent cooling of the charge temps and keep cooling temps down.

 

or you can be a water injection ***** like me and use a tiny Blitz SMIC that spools instantly, doesn't block the radiator, is cheap and most of all with the water injection protects the engine far better than any FMIC.

But for bling bling the V-mount ownz us all.

 

you don't have as much of a pressure drop with a V-mount as you do with a FMIC as well. The V-mount is just as good for drag racing as a FMIC if not better.

 

I wanna be a water injection *****

Need to get my M2 big SMIC first tho

 

Problem w/ the V-mount is, its hideously expensive. Almost $3k for intake IC and rad. when all is said and done., and its not like you can do it in stages.


SCRUB:
I still wanna see yours if we can hook up in MD this weekend... where u gonna be?

 

this weekend I am going to Myrtle beach for a week. Thursday or Friday would better.


PM me and we can set something up.

 

I don't agree that it is that expensive RELATIVE to similar parts from other tuners (Koyo-$400, intake-$450, SMIC-$1600), but I certainly agree that it is a LOT of money all at one time......which is exactly why I went for a Fluidyne and a used PFS intake/SMIC for now.

 

Using japanese prices as a guide...

(comparing the apex(i) s-spec fmic and rad to a panspeed/ks/ame v-setup, which are similarily priced)

...the v-mount is about US$1k more.

I have to disagree with you all, re: v-mounts and drag racing. A recent option 2 magazine had a feature which included quite a few 10 second rx7s (strip dedicated) - how many had v-mounts??

0

How many of the circuit cars featured had v-mounts?

All but 1

 

Um, strip dedicated Rx7's dont need intercoolers. They usually run Methanol which burns cool.

 

really? better tell that to all those who don't.

ps - if it helps, I'm talking about std chassis/street rubber class (or at least the japanese interpretation of that term) - not the 6-7 second cars

There is no way a v-mount would be as efficient as a massive fmic for 0-400m racing. Sure, you could run big times with one, but that doesn't make it a smarter 'cooler

 

This should satisfy your definition. You said, track only, steel body, etc.

http://www.srmotorsports.com/mazda_rx7.html

No intercooler, stock seals. Enjoy.

 

also the V-mount is still relatively new. If you look at a lot of performance cars in general you will see a number of V-mount setups. FMIC's are a pain in the *** for a number of reasons. for one it blocks the air that goes to the radiator, and secondly it collects **** in it and dents from rocks as well. If you don't mind all of that then go for a FMIC.

 

ZeroBanger: better tell me what your point is, I'm not sure. We are talking about fmic vs v-mount aren't we? I'm saying that a fmic is a better choice for drag than a v-mount. I'm saying that in the street drag classes in japan they are running fmic. The same workshops are running v-mount on their circuit cars.

Um, I think your info is interesting. But I'm not sure how it is relevant in this particular thread.

BTW - nice car in that link - but it's tubbed dude! Full chassis? great, if so. But that ain't street class even in japan!!

 

NO that car weighs 2500 lbs, steel body with power windows.

My point was for a dedicated strip car, you dont need an ic, just run methanol. There is not point to have an IC.

I would take a VMOUNT anyday to keep my car from overheating with the FMOUNT covering up the front of the car.

 

We are talking about STREET cars - which is why I used streetable cars as a demonstrative point.

Tis a big difference between a street (ie: good for 99% of people on this forum), pro-street, and full-drag car.

The basic street class is what we should look to for relevance.

So, again, I think the lack of ic is a moot point.

What I'm saying is - look to the east. They know a hell of a lot more about rotaries than the US (I'd bet there's more rotaries in my backwater prefecture than there is in the entire US). If a workshop is running a fmic for their drag car and a v-mount for their circuit car - they are not doing that without reason.

I also note that Archie Kajewski of mazfix (australia)runs a fmic on his street car. A 10 second street car. This is a man who races a pro-street rotary to 7.77 sec @ 176mph. In a recent article he claims that his custom fmic is the key factor in the strength of his street car. He can run anything, has been around rotaries for decades, would be aware of v-mounting, yet (like the japanese), runs a fmic.

That says a lot to me.

I agree - the v-mount is a good, if expensive, choice for the street. In conditions that lead to high temps (stop start daily driving - med. - long distances, very high temp summers) - would certainly be my choice over the fmic. However, the average street car will NOT need one.

 

Actually speaking of Japanese tuners, IIRC RE Amemiya was one of the first tuning companies to fab the V-mount.

 

rotary and non-rotary have been running them in the JGTC for some time now. Not sure who was first to do it though - but the design has been taken up by both rotary and piston in a number of motorsports (but, notably, NOT drag!)