So I was looking around for new stuff for the cooper... and since ATP is known for their "bolt on" garrett turbos and found this:

Adapter for GT25-28 flanged turbos...

http://www.atpturbo.com/Merchant2/me...ry_Code=COOPER

"Turbo kit" with adpater, turbo and downpipe:

http://www.atpturbo.com/Merchant2/me...ry_Code=COOPER

So now where are the flashing softwares... Alta... RMW... ???

 

wow, looks yummy!

I can see around 300whp a possibility with that kit and a sweet tune!

 

motec M400 + above "kit" =

 

never seen that before, thats some cool stuff

 

Cant someone order this and get a unichip certified shop to tune the car for this?

 

Wow that looks quality....
Forgive my stupidity, but is that turbo more powerful than the Alta GT2560r turbo?

 

If i had the money right now id have already bought it! Now i know its available i am going to start saving. It would be great for us in the UK if P-Torque could do the mapping!

Or like TurboMini says a motec stand alone wouldnt be too shabby in conjunction with this turbo kit But the motecs are so expensive! Adding to wish list

 

28 is the next size up over 25 literally about 3mm bigger. To be honest the 25 is probably a better sized turbo for our application.

 

I hear the 28rs will spool up quicker...And other than that they are pretty much identical

 

You're right the 28rs is actually a more efficient turbo and typically spools up better for most applications (cars with anywhere from 12 - %50 more displacement then our cars). With the 1.6 and the direct injection I am betting the 25 will be a better selection for most people. With the right supporting mods it will put the car well into them mid 300whp range which is about all makes sense in these cars anyway. Then again until we actually see a BT R56 its all just speculation anyway.

 

But what a great day it will be when the first person breaks the mold and we all follow Will be amazing to have those kinds of figures on the little mini, id love to have a go in one without an LSD

 

wonder what it would do for a new jcw mini? with the new pistons and stuff. i got to trade in my ride this year. but if they f me on my trade this looks awesome. i can see using exhaust depots pipes with the hk blow off and getting a new clutch with a lsd with some coilovers.

 

It would be amazing on the JCW factory car as with the uprated internals you could turn the boost up so much more than us with standard internals without worrying about frying anything Still have to watch the clutch and box though

 

yeah buddy!

 

Hey Coopman, in your sig it says you have 250+bhp and 285+wtq with a stage 1 from P-Torque, thats very impressive and high for such a small turbo, what does the stage 2 look like?

 

@FLY

Ive had to cancel and re-book my stage 2 remap 3 times in the past month due to really bad weather but should be all done before end of this month and will have dynos for before/after comparison too! Nobody will know what its like till ive been as i will be the first to get this done but i will be posting about it as soon as i get back.

 

Ahh! Too bad I am not located on that side of the world But I am looking forward to it. When you get it done go straight home to the computer, no where else, and post your numbers ASAP! Oh and what are the boost levels your at now?

 

This is exciting...but tuning is the key here and there is a blatant lack of that right now. (we're patiently waiting Jan!)

Also, I don't think anyone has really played with this motor enough to know what it can handle. I'd be very leary of running a GT28RS on a stock motor and stock compression ratio. I'm sure there's also the need for things like beefier injectors and plugs. Fabbing up a direct bolt on turbo kit is not the hard part...getting it to work correctly and safely to its full potential is...as we have seen with Alta's GT25 project from way back when.

Also...I'll take the GT25 or K04 over the 28rs with my R56. I enjoy the lack of lag with the K03 and would not want to give that up too much.

 

Dont worry i will be right on here straight away. Id prob be shaking too much with adrenalin to type

If you really wanted one and have the money you simply buy a motec stand alone ecu and take that to one of the thousands of worldwide tuners who specialise in the motecs and it would take an hour or 2 to setup, expensive yes but the solutions are there.. Another point - Alta yes they have been working on theirs for ages but i can say from my experience with Lotus Elises that its NEVER the first tuner that comes out and advertises their kits that has them out to market first, infact ive seen alot of tuners advertise the outputs of their kits and delay after delay and eventually 5 other tuners out of the blue released their own kits, which to this day have stood the test of time, so i cant speak for alta but i did ask alta last november in an email if they would just sell me the bolt on kit (minus tuning software etc) and still havent heard back and i then made a comment that another tuner would beat them to the punch.....

And on another note - you havent had a GT28rs in any of your cars have you ? If you did you would note how good it is at spooling up, the GT25 IS MORE laggy than the GT28rs

Simply put its not hard to tune the car around this turbo, sure if you want the standard ecu mapped to run it all you will need someone special, we have a guy in the UK who would love to map these kits

 

Thats why I'd like to see end user tuning available.

Internal wise I doubt the JCW car is far stronger. The compression and injectors will be just fine for 250-300whp I'm guessing. Direct injection is very different than normal setups. Theres always audi s3 injectors though. There will be some things coming soon.... be patient.

 

Yes actually my brother-in-law had an Audi A4 1.8T with a GT-28RS, which I drove often. While there was not huge lag...it was definitely present.

 

If you want zero lag a turbo the size of a pea will do that, it wont hold any worthwhile boost though But all i was pointing out is that you did say youd prefer a GT25 or K04 over a GT28rs and im just saying the 28rs is a quicker spooler than the 25 and if you call at gt28rs a 'laggy' turbo id hate to see what you thought about 'actual' big turbos. I guess it is each to their own though.. Id much rather have a big turbo thats fully singing from 3000rpm to 7000rpm than a small one thats pretty much already hitting its limits..

And if you have experience with electronic boost controllers etc you will know how quick a turbo builds its boost can simply be altered by a dial, this is generally called the 'gain' setting and it controls how quickly or slowly you want your turbo to build up to the desired peak boost level.. If your running boost levels like 1.0 - 1.8bar on a 28rs you wouldnt set gain too high otherwise you would get boost spikes and not too low as you wont reach your desired peak boost level in time..

Being that your mates power band would have differed alot to yours im sure if you sat at 3000rpm in your mates car, whatever gear, and then slam your foot down and that GT28rs will spool up right away - sure you will lose some driveability under 3000rpm but ive drove a few torquey/powerful turbo cars like this and they are still a pleasure to drive around town because although the turbo wont react instantly at 1500rpm its still juicy enough to smoothly and effortlessly drive about town, and then you have the crazy-almost-lag-free 3000rpm+ for fun times

 

I didn't call it a laggy turbo...I just said it was definitely present. I've driven plenty of big turbo kitted STi's and EVO's to know what real lag feels like.

For my street driven MINI, I'd prefer to stay as close as possible to the zero lag experienced with the stock turbo. Coming from a tuned R53....I want the access and driveability of instant power, and the R56 pretty much does a fine job of that with its tiny twin scrolled K03. I know by going with any turbo larger than it will create some inherent lag...all I'm saying is I'd hate to sacrifice too much of that just so I can get big peak numbers.

 

I totally understand. Im more into having mine setup for track and drag as theres only so much you can do on the road

I test drove the Evo MRvfq400 a couple years ago and that was brutal out of the power-band.. But after coming from a car which had a very similar turbo to the 28rs and of similar engine displacement it was great with low boost output, even more insane with a slight tweak.. If things go to plan i will have one of these ATP kits on by end of May!

 

I just want a slighty large turbo that will carry the power all the through to redline. I want my powerband to be a ramp, not hill like it is. I don't care for raising the RPM limiter, I just hate the feeling of losing so much power quickly.