I have a stock Cooper S (R56) from 2008 and consider to buy a Milltek catback including hi-flow sports cat (http://www.millteksport.com/exhaust.products.cfm?variantid=221)

The car magazine Performance Tuner has tested the exhaust -[FONT=Arial]http://www.millteksport.com/media/images/press/28.pdf[/FONT][FONT=Arial] - [/FONT]and the result of their dyno test shows a gain of 28,4 HP!!

It’s much more than I would have expected! As I understand Performance Tuner didn’t also tested the car with a stock exhaust. So the gain might be less that 28,4 HP because a stock Cooper S (R56) can have more than 175 HP (as far as I have understood from this forum). But still a gain of e.g. 20 HP just because of another exhaust I would consider as pretty much.

Does anyone have experience with the Milltek exhaust (the full system including sports cat) and have dyno results they would like to share?

Does anyone know of other test of the full Milltek system?

Thanks!

 

it says measured at the crank doesnt it?

 

Well I might have misunderstood the test but they conclude that the car has got 203,4 bhp and they compare it with the stock model 175 bhp and the difference is 28,4 bhp...

 

interesting that the boast is about the great hp increase, and its a first post.
regardless, i know that their customer service and upholding warrantys etc for their products are not the best. this is coming from audi enthusiasts who are filing lawsuits against them for related issues. Fitment issues for some audis, but maybe its a great system for a mini, though I highly highly doubt theres even near 20 hp from a hiflo cat and exhaust, without upgraded dp's or anything. but good luck.

 

i would be HIGHLY dubious of any exhaust claiming 20 let alone 28 HP gain.

-Hutch-

 

As much as I love my Milltek those gains seem very inflated. How did they dyno it at the wheel or crank, the stock 175 is at the crank and if they are claiming 203 at the wheels after the exhaust..........Buy it.

 

 

I would not give the catback that much power potential. I put a catback on and all it did was sound good. THE TRUE POWER IS IN THE DOWNPIPE, no matter what brand of exhaust you choose. Theres a reason why the downpipe is so expensive, it makes HP. I only rate my catback at 5-8 horsepower, anymore and I would have felt a difference like I felt the first time I mashed the gas pedal with the DP installed.

 

 

OxyblueCoop,

Great Graphic, Very appropriate.

I can think of many other places to use it. Can I borrow it?

 

http://www.spazdek.com/forum/misc.php?do=showsmilies

 

Wow, there are seemingly hundreds of them.

Thanks.

 

YEP...

 

There doesn't seem to be much before and after testing for this exhaust. I contacted Milltek shortly after they released it and they admitted they had not dynoed the stock car which I thought was odd. They are simply comparing the figures they found after fitting the exhaust with the stock figures Mini publish.

Here's a thread on Mini2 showing before and after dynos from one owner:

http://www.mini2.com/forum/2nd-gen-e...3-milltek.html

Also don't forget the UK and US cars have a slighty different exhaust setup when it comes to cats so that may make a difference?

 

Agreed

I too am doubtful of those type of h.p. gains with the downpipe or with just the catback.

 

I just read that Quicksilver claim a gain up to 35 bhp on a R56 with their exhaust (http://www.quicksilverexhausts.com/story.asp?NewsID=89). It sounds to good to be true...

It would be nice to know how much power you possible can gain if you change to stock exhaust. Just wondered if you could determaine the theoretical potential by dyno a stock R56 with the stock exhaust and dyno the same car without any exhaust at all?

 

Does anybody that has a milltek, has observed any drowning?

 

We did this.



This is a graph of our bone-stock car before and after installation of a 3" open downpipe with NO cat-back exhaust on the car at all.

It was crazy loud.

So, my conclusion from this is that the MOST horsepower any exhaust could ever give you is around 14 hp to the wheels. (The Dynapack display says "flywheel hp" but the numbers are to the wheels.)

--Dan
Mach V

 

Excellent thanks Dan!

 

i think the reason there is such a big power difference is because the R56s don't make the claimed power, and that they are vastly underrated. The car probably made ~20 hp more than claimed, and they might have got an additional 5-10 from the catback.

Catbacks do make a difference on turbo cars, but no way would it make 30hp.

I'm gobsmacked that a bone stock MCS dynoed 190 whp and 190 wtq. That's just epic.

I wish u guys recorded that run, would have loved to hear it

 

I've driven my R56 around for a few weeks with just an open downpipe...granted it wasn't a 3 inch like Mach V Dan said they did, just the stock dp. I really did not think it was loud at all. Sounded pretty good actually...just a little too unrefined for a street car for my liking. But other than that, my old R53 with header/exhaust was much louder by comparison.

 

I wish I had one of these magic R56s that make all this extra power. I honestly don't understand it. I have all of the Alta tubes and the intake, and I don't feel like it's that much faster than stock. I saw a video of a supposed stock R56 vs a stock 350z, and the r56 kept up with it, and even won once. There is just no way I could hope to beat a 350z. WTF?

Sorry for the rant. I'm just curious.

 

I've ran a bone stock EVO IX, Mazda RX8, and a 350Z and either ran neck and neck or a little a head. I think its mostly driver but under the right hands these cars and fast.

 

That is most certainly part of my problem. I am in no way a pro driver, but I was behind a civic one time, and while I was gaining, I was gaining way slower than I feel I should have been. But who knows, He could have put all kinds of stuff in that junker. I was kinda bummed though.

 

D-Unit

I would recommend that you spend a little time doing High Performance Driver's Education (HPDE) with one of the car clubs (such as BMWCCA or PCA). The strength of the Mini is the ability to put more smiles in the curves. The track will demonstrate many great things about the Mini. My friend and driving instructor for many years, a retired professional race car driver, always told me not to worry about HP until I can drive safely as fast as he can with the same car on the same track. So far no way on my part but I am still learning and trying.