[Blacky3860]

Just wondering if it would be possible to fit a turbo to a coopers s as well as keeping the supercharger? If so would it be easy to do and how much would it roughly cost?

[racer-x]

A guy on NAM has done just that, he Twin Charged his MCS, and is still in the developmental stages. but according to him 300hp is easily achievable. I'll post a link here. http://www.northamericanmotoring.com...ad.php?t=21783

[dgszweda]

Helix13 (www.helix13.com) will be releasing a twincharged setup very soon. I think in the next week or so. It is claimed at 250hp, for less than a JCW kit.

[Mini_Blake]

Quote: Originally Posted by dgszweda

Helix13 (www.helix13.com) will be releasing a twincharged setup very soon. I think in the next week or so. It is claimed at 250hp, for less than a JCW kit.

If you read the thread over at NAM, someone says that SPI and helix are collaborating, I think helix will be doing the distributing of the system. It says that it is going to be unveiled at SEMA (spelling ?) in Las Vegas in November so we could all be in for a wait.

[YaST]

The question is.... What will break first, the engine or the drivetrain?

[Wobert]

Quote: Originally Posted by YaST

The question is.... What will break first, the engine or the drivetrain?

I would guess the gearbox.......it's only rated to 254bhp.......

[fatredcircle]

Somehow I don't see the need for a twincharge setup this day and age with ball bearing turbos. As stated on nam, you're getting double heat, and unless your intercooler can bring that temp down dramatically it'd probably be more beneficial to go single turbo, while keeping temperatures way down.

[Johnny_Rocket]

The reason is power... We want to be the guy with the mini cooper who kicked the crap out of that STi... Is all about the bragging rights baby...

[MINIMANIAUK]

A twincharge system for the mini would be very complicated and fairly pointless,the idea of twincharging is to eliminate lag on the turbo as it spools up ,lag only occurs on very large turbos for large engined cars -the Mini only being 1600 does not need that big a turbo so lag would be at a minimum anyway. no doubt that a turbo Mini will make more power than a supercharged Mini due to the reduced losses in driving the turbo via exhaust gasses,the better efficiency of the turbo compressor,the greater air volume produced and the reduced temperature of the air, this has been done before and works very well in the Mini. turbo power is I believe better than supercharged power but is the market place ready for such a conversion? with people worried about warranty if they change an air filter! If anyone wants a turbo conversion I can do it but I think this will be more popular as the car gets older and changes hands into the more adventureous owners.also factor in the new model which will be a turbo from factory(although I dont think the engine will be as robust as the current unit and not get anywhere the power levels of the current one) -20psi boost on a cooper S any interest out there?

[Richard Crofts]

BBR in the UK and Lohen.co.uk also have or are developing twin charge kits.

BBR claim over 300bhp not sure wether Lohen have posted up any figures for thier twin charge unit, check the site. Cost is big I believe, probably over 7k easy I would think with all the gearbox and turbo work etc.

[tedleist]

Read reply #23 of the first link. It takes 60 HP to turn the MINI SC with a 19% pulley
at high RPM.


http://www.michiganmini.org/forum/index.php?topic=7.0

http://www.madnessequipped.com/turbo_conversion.htm



QUOTE=MINIMANIAUK]A twincharge system for the mini would be very complicated and fairly pointless,the idea of twincharging is to eliminate lag on the turbo as it spools up ,lag only occurs on very large turbos for large engined cars -the Mini only being 1600 does not need that big a turbo so lag would be at a minimum anyway. no doubt that a turbo Mini will make more power than a supercharged Mini due to the reduced losses in driving the turbo via exhaust gasses,the better efficiency of the turbo compressor,the greater air volume produced and the reduced temperature of the air, this has been done before and works very well in the Mini. turbo power is I believe better than supercharged power but is the market place ready for such a conversion? with people worried about warranty if they change an air filter! If anyone wants a turbo conversion I can do it but I think this will be more popular as the car gets older and changes hands into the more adventureous owners.also factor in the new model which will be a turbo from factory(although I dont think the engine will be as robust as the current unit and not get anywhere the power levels of the current one) -20psi boost on a cooper S any interest out there?[/quote]

[MINIMANIAUK]

There are also other issues with twincharging ,if you put the 2 air sources s/c and turbo in parallel one back feeds the other so a complex system of non return valves and wastegates are necessary if they are put in series one feeding the other this also causes issues with airflow ,parallel is the way to go but it is an engineering nightmare to achieve -possible but hellish expensive,mapping a twin charge system is also a minefield and expensive £7000 I dont think so-multiples of that!!! and to what end ? now a good 260 bhp turbo kit would be both feasable and affordable and upgradeable to those who want the maximum possible. the limiting factor on the cooper S was,is,and will be the supercharger ,it is an off the shelf ,cheap and reliable unit but has its limitations: maxing it out with ever smaller pulleys,and crank pulleys and then trying to keep the charge air cool with upgraded coolers is not really the answer,it works to a point but will never be as effective as a more efficient charger or a well matched turbo. when the warranty issues and worry factors dissappear we will see more of this type of conversion along with a speedster conversion these two are the things I am waiting to get to the markerplace and would love to do

[s_and_m]

With a big, hairy turbo?

Tell me more!

S

[Capsaisin]

Quote: Originally Posted by Wobert

I would guess the gearbox.......it's only rated to 254bhp.......

OK now I'm interested. What do you have to do if you get a 260+ conversion. Cross your fingers or change the box?

[MINIMANIAUK]

We can do an uprated box both for the cooper and the S normally used for racing applications with different ratios and lsd,for a turbo car we would also do an uprated bottom end to keep things together and stop the crank walking,box would be about £2000,the kevlar clutch will take about anything you throw at it. anything can be uprated its only a question of money and willing.if someone has the money,we are more than willing.A lightweight speedster is a more expensive project yet as the first one would swallow some serious cash but thereafter the cost would drop but what a beautiful car it would be with a D type jag like rear cover and room for the golf clubs any very rich people out there give me a call

[Capsaisin]

I know anything is possible if you throw money at it. But I was really wanting to know what happens in the real world outside of track cars, I believe there are a few Mini2ers running 260ish. What have they done to their pistons/rods/crank/gearbox. I take it as read that the flywheel/clutch will have been uprated (well I would at that sort of bhp).
There are tuning companies offering conversions of 260bhp and more without any hint of having to change or uprate the gearbox.

[Wobert]

Quote: Originally Posted by Capsaisin

I know anything is possible if you throw money at it. But I was really wanting to know what happens in the real world outside of track cars, I believe there are a few Mini2ers running 260ish. What have they done to their pistons/rods/crank/gearbox. I take it as read that the flywheel/clutch will have been uprated (well I would at that sort of bhp).
There are tuning companies offering conversions of 260bhp and more without any hint of having to change or uprate the gearbox.

Chances are they just accept a lower durability rating on the gearbox and running gear.......so instead of it lasting 150k miles it'll fail at 100k miles.....

MINIMANIA, what work do you do to "improve" the bottom end?