UrS4 2.2T Avant project

[eske]

I don't just say that, I have tested it.

Of course my setup has changed:
HX40Super - HX52Pro
-stock head -> ported
-aan cams -> regrinded 7A
-98octane -> e85 bioethanol

[prj]

All things equal they do not spool the same. It is simply physics…
Of course it depends on the exhaust side housings used as well.

At least the engine seems to be doing well. Last year we had a little of Finnish sauna in the car at 2 bar, now it seems to be working alright.

Try to decide on the setup and when you have finalised it, let's map it

[Thuppu]

Yes, of course all those makes the engine breath better, wich will make turbo spoolup also better. I have to face the reality of my stock head, at some point it just start to resist flow too much.

[Thuppu]

Yeah, it would be nice to get it ready at some point. Even that propably it's never ready for good.

[prj]

Going any bigger than HX40 on stock head is pointless imo, it just does not flow.

[Thuppu]

The car survived the track day we had today.

The small boost hose to the ecu popped off two times, need to use better hose. Check engine light was on and off randomly, got some fuel cuts, breather messed everything in oil, its dripping out from the front wing lol, exhaust tips made some space for them selfs... good thing is that engine held up the abuse.

[Thuppu]

Few pics of the stresstest day. These are taken by ///Juho from the finnish BTCF forum.

[prj]

Good news!

[Thuppu]

Have to do a boostleak test, suspecting there is a leak somewhere because it started to go even richer at the end of the day, and got fuel cuts on harder boost. Don't know about that check engine light. I'm not sure if it's goes on because the hall window isn't perfectly aligned? Usually it light's on when you go off the throttle at high rpm's. The adjustment is fully used on the wheel, so I did the window a bit bigger, but it seems not to have any effect..?

Another thing I suspect is the catalytic converter... maybe it has melt..? What is the symptons of a clogged cat? Richer AFR?

[prj]

Need to pull the codes.

Also, with speed density it won't go rich with a boost leak.

[Thuppu]

Aah, yes your right. Forgot it measures the pressure... What can make it go richer? Missfire?

I don't know if it's possible to pull codes from it with VAG-COM with this setup?

[prj]

Misfire always indicates lean on a lambda probe, because lambda measures oxygen content and if there is no firing, then oxygen will be dumped into the exhaust thus showing lean.

If you have the hall window out, that will cause it to massively retard timing and go richer.
That, and considering you are running something like a 45 minute tune, it can be anything...

[Thuppu]

The "fuelcuts", could it be that just spark is missing? It feeld the same that when my OEM coils starded to fail at high boost.

[Laaf]

How come the breather pushes that much oil?

[Thuppu]

No breathers in the head so all air moves from the block and puches the oil up with force in hard accelerations. This with a bad designed separator(hand made by me ) and you have the problem.


Latest dyno vid: