bhvrdr

So if it is set to run around 110bar (which coincidentally is what the turbo FSI was set to run) you should be seeing that on a WOT run. It'll fluctuate. Say it was programmed for 110bar, you may see from 105 to 115 spikes but you should be able to draw a line through that log and see an average of whatever...say 110bar. It looks like 3ms give or take huh? Not bad at all. That does appear to be plenty of room. The turbo cars will need bigger injectors with their higher hp kits, probably with their K04 kit to maximize it too. You guys are lucky bc my guess it they will be expensive.

Evil Buddha

I like the idea of no-Cats. How would anyone know if there was nothing in them?

bhvrdr

Theyd look at your CEL that is glowing.

RI A6

At 6000 rpm specified pressure is 112 at WOT. Above that they set it at 115 with a 3.06 open time all the way out to 8000 rpm. Longest open time that I see is 3.57. At 8000 rpm 360 degrees of crank rotation is 7.5 ms. Usually you want the injection period to be less than 180 degrees with direct injection, so that the spray is distributed by the intake swirl pattern. That sets the max injection time at 8000 rpm to 3.75 ms. Which says that for the RS4 engine, if we could somehow increase flow, there is still headroom for 25% more horsepower. Funny thing, thats 525 Horsepower, pretty damn close to the 540 HP that MTM claims with their supercharger.

If we look at the 2.0 TFSI engine at 6000 rpm, then 360 degrees of crank rotation occur in 10 ms. I'd say the 7ms and 9ms would be too long to be contained within the intake stroke. The spray will then continue significantly into the compression stroke. This will probably cause wetting of the cylinder and piston crown.

I bet those tricked out TFSI engines have one hell of a problem with fuel dilute in the oil.

Bob W.

but obviously there would be sacrifices to be made elsewhere.

RI A6

Currently the injector on time is not optimal, since it remains on for more than 180 degrees. So higher flow injectors will help ... if, and only if, the fuel rail can keep regulated pressure up at the higher flow rate. But those injectors are a lot harder to design and manufacture than the old manifold injectors, so they will be spendy.

Bigger injectors might also require modifications to the rail pump and/or regulator, if either cannot keep up with the increased flow. If that were to occur, then it could get ugly, and very expensive.

Bob W.

a little piece of electrical tape'll fix that right up.

Vijay

Many states are moving to OBD port based emission testing where they basically hook up to the OBD port and look for codes to see if all with well with your emission controls.

bpp

Not satisfied with what you got? Can't use what's in it already.

jchobby

The ? how do I get more out of this already great package seems to be gaining steam. Makes sense as more cars get in the hands of the US market, and people worry about BMW M3 etc. I'm not going to loose sleep over it. I agree Audi will not make upgrades for FSI V8 with the V10 in the house. If you want more power call MTM and get on the list. There superchager could be short lived. You can have it for that price. RS4 didn't get Performance Car of the year for nothing.