I saw some guys on vortex running larger turbos on stock software, chipped software, or revo alone. No special tuning, getting really good results. Until proper tuning could be done, with the proper manifold, DP and lines, could I run a T04E off my stock or GIAC X chip software with maybe just an MBC to help out with wastegate control?

First the right maf/injector setup would have to be found, then you would have to deal with the adv timing being off since the IAT's will be much lower with that larger turbo.

The MAF I could understand, but I'm sure it could be made to work. I was thinking it could be done off a higher bar fpr. The 225TT already has larger injectors. And as far as the much lower intake temps... would that also be much of a problem? The timing could be advanced through the adaptation, and that would conversely solve some of the fueling problem wouldn't it?

Most of the time the ecu is pulling the timing back, change the intake charge or put in higher octane and it stops doing that. There is a point where it wont go any further. The main issue will be load settings when you go with a larger maf housing on a stock chip.

You can change the pressure with a FPR, but the ecu will have to remove even more fuel during short/long term even though you might get closer to what you want at WOT.

What about the stock maf as far as it can be pushed (how far is that?) I have an FMIC also.. so I think that the intake charge is already pretty darn cool.

Basically, could I just run equal boost or a bit more, maybe just like 28psi or so (which Gesttalt runs on his normal 225 K04). Then airflow and fueling should be okay.

Just like gary who has a nice collection of them..

Its not a plug and play application like those on vortex like to think.. The one case that I saw was MORE then just a stock ecu even though thats all he claims in his sig.. Just try and run 21psi on the stock program and see what happens..

F--- it, ill ruin the surprise.. You'll throw a code, and you'll go into limp mode.. :)

What needs to be done when installing a turbo?

You'll need to enlarge the MAF housing so you aren't blowing them every day, then you need to figure out how to get more fuel in the system, because with a larger diameter housing you will be taking in more air at a lower reading causing your car to run lean.. Then you need to figure out how to fool the ECU into thinking your running less boost then you really are otherwise you'll be in limp mode.. As for running 28psi on a TT.. Gary is the only one.. And he has a setup unlike anyone else.. BTW.. what boost levels are you running this week? yeah.. no where near 28psi.. try getting the K04 to hold 25psi and then see what your car does.. If it was as easy as throwing a turbo on there and just adding an FPR don't you think a lot more people would be doing it? **** I would have installed a larger turbo a long time ago..

For the amount of money that you would spend trying to get it to work, you can just buy a kit and the truth it it will never work to its full potential without the programming..

If anyone here disagrees.. please speak up, otherwise Im bolting on a turbo next week and im going to let my stock ecu figure out the rest for me..

which is going to be well over the max of the stock maf sensor.

<center><img src="http://pictureposter.audiworld.com/54525/dsc00070.jpg"></center><p>Don't get a turbo without the proper programming. Each turbo has a different map, and will perform differently than another turbo. T04E compared to K04 hits its boost levels at a higher rpm, and programmming has to know that. Otherwise you'll run rich at lower rpms and lean at higher rpms, for example. K04s can work on OEM programming or even K03 chips because the maps are nearly identical, but T3's and T4's or any hybrid version are an animal all thier own.

What happens when you run a T3/T4E with crappy programming &amp; try to run crazy boost levels? I know, first hand......

I am starting to look into options...

Would even a dual ceramic ball bearing abradable coated turbo spool that much higher? Couldn't it be made similar? This is for a daily driver.. not an 8000 rpm spool track slut. And thanks for all the input... I appreciate it. Sorry for any dumb questions.

it was making around 350 hp at the time.

28 psi on a K04? Hmmmmmm...you mean he may peak at 28 psi which I think it is kind of difficult. Not sure about TT's but the ATW motor has a boost sensor in which cuts your load at anything over 1.45 bar or 21 psi.

Mau

and we don't have that sensor...

That chip is for a 2000 ATW motor.

discouraged...if this is somthing that you want to try it will work out for you if you think things through and understand how the car works.

People told me the same kind of things before I put my set up together. A year and 30k or so later....Im still running strong with 350+ at the wheels and crusin on the highway at 30mpg.
It can be done...just make sure you understand as many of the factors as you can before jumping head first in to a set up like this.

i am working on my 180TTQC, been at it for 4 weeks now, (but i only work on my car on sunday - skip church).

my stock turbo is almost out (man its a PITA), i am using ATP manfold mated with gt25r. i ordered bunch of mandrel bent ss pipes for intake plumbing. all the air plumbing for the stock intake could definetly use major upgrades.

i will run the shortest route from intake -&gt;turbo -&gt;intercooler -&gt; throttle body. lots of welding but it sure beats going to church on sunday.

the hardest part of upgrading is the hardware IMHO, putting the right turbo and mounting it correctly and using proper lines for oil, coolant, etc are the hardest part.

as for tuning, i don't think its that much of a problem, but i'll see once the turbo is in.

i am estimating about 12 weeks before i finish.

Want help on Sundays?

You'll have to run a boost controller, start off with maybe 10psi or so, and slowly work your way up until your stock injectors are maxed out.

My best guess is you'll max the stock injectors out at around 15psi.

Or would that be a good think in a way? Significantly more power on a much lower boost level?

T03/T04E recipe in the works right now :)

since you will max out the stock maf sensor in a hurry. I was able to max out my 2000 stock maf running 18psi with the K04 on my 2 liter motor.

help is always welcome, but i think you live far away.

but if you live close, or think of coming to visit vancouver gimme a shout, maybe i can weld something for you or give you a hand with something.

Does this chip eliminate the need to clamp your MAP signal on DBW? If so, couldn't the MAP help control your fuel map once the MAF gets maxed?

Running a maf near its limit will also cause it to burn out.

due to the higher turbo efficiency.

Lower temps = Higher density = More air mass = More fuel needed.

Your stock injectors won't be up to the task of running efficient high boost (key word: efficient)

To compensate pretty darn high.. Especially on a 5 bar FPR. Since they're good to 300+ on a 3 bar.

I'd be hesitant to go above 4 bar, as the fuel pump may not be able to support the high fuel pressures seen during high boost.

If you try to clamp the maf you just end up making it run lean after you reach that lower limit.

and cant you bump up the fuel pressure to take care of the lean condition past the point of MAF maxing out

and a dbw setup will just shut the power off when the maf hits the 215 g/s. If things were this easy everyone would be doing that and there wouldnt be any tuners in the audi market. There are just too many things that must be dealt with when it comes down to tuning our cars.

bolt on big turbos and make good horsepower? What is so different about their setup?