Toxcheap

You don't think it would be beneficial to keep it at full boost (Well 1.7 anyways) until it comes off cam around 6500-6600 rpm?

Later
TOX

Mihnea

The problem in doing so is reducing the turbo's lifespan, boost at peak HP RPM (5500) is 1.53 Bar exactly, and it drops to 1.3 at 6000 and 1.22 at 6500, at least that's how I've programmed it at sea level, dunno how it ran on the dyno as I wasn't there and the owner wasn't allowed in the dyno area either (special rules in Switzerland).

I guess the engine could do 380-ish HP with 1.6 bar at 5500, 1.55 at 6000 and 1.4 at 6500 but the problem is that it's running way out of its efficiency range (at 364 HP it is already anyway) and this would also put a much higher strain on it, which is something I don't like because I like tuning cars and making them as reliable as possible.... 1.7 Bar at 6500 would probably only last for a few months, which quite frankly I don't like....


Cheers,

Mihnea

Toxcheap

We've had pretty good luck with our moddded RS2 turbo (I.A. it has a different exhaust wheel.)We've been running 1.6 for the last two years all the way to our 6800 redline (it's a 10 valve). We've been running at 1.8 since July this year (waterfest) I let you know if we run into any turbo failure.

Thanks
TOX

Mihnea

It's always interesting to know what people are running and for how long it lasts before experimenting myself :-)

For instance, I know of an RS2 tuned by some crazy dude in France running 2.2 Bar peak, dropping to 1.9 and holding 1.7 at 6000 and 1.4 at 7000. Been running like that for 60.000 kms at least but there's no way in hell I would go that high, unless the customer agrees to sign a paper saying that he will in no way blame me for turbo damage in case this happens.

Now 1.7 max boost and 1.1 at 7k is supposed to make the turbo last as long as it was meant to from the factory, and I quite frankly like that a lot :-)

Toxcheap

I completely know where your coming from, our RS2 is by far the single most expensive part on the car in fact costing twice what we paid for the car! Because we wanted Ned's turbo with the different exhaust wheel, we forked over $1500. And even though that's a lot we're very happy with it. We gambled as to whether or not we would notice a difference. But you can and even other RS2 turbo owners have told us how they could immediately notice a difference. Now after reading your posts I'm very curious to find out if the exhaust wheel change affects the turbo speed under high boost.

Thanks
Myke (Toxcheap)

P.S. I went for a ride in that 2.0L A4 using the K16. Because the map wasn't dialed in yet boost was set at 14psi. I have to admit it was impressive! It was giving me a little bit of a head rush under acceleration. I was holding a digital pyrometer and it was hitting 900 degrees Celcuis so it was lean. Can't wait to see if it hit its mark (450 to the wheels) when it tuned on the dyno!

zoofs4

Mihnea I tried e-mailing you but I wasn't sure whether the address was correct. Could you e-mail me dzefkic@hotmail.com I'd like to have you quote me.

Mihnea

It's 1:34 a.m. here now, will email you tomorrow morning, should be late tonight for you though


Thanks,

Mihnea