Flat spot at 5200rpm on 2.0T - Does yours do it?

[cuprak1]

We are getting better slightly.

B8 t6 f9 pulls hard. Still a flat spot but not as noticeable

[Poverty]

Video of a k04 car with flat spot.

Its gone from b7 timing 5 fuel 7 to boost 8 timing 6 fuel 9 and seems to run much better.

Anyway compare the two vids and come up with your own conclusion.

http://www.youtube.com/watch?v=jfDc-OEzhgE b7 timing 5 fuel 7

http://www.youtube.com/watch?v=ZFLVP-dDWyE b8 timing 6 fuel 9

[NEWEY]

Just to let you all know my sports cat was replaced on Thursday. Everything is sorted at the flatspot has gone. Milltek have actually stopped doing two different size down pipes k03/k04 they now just do the 77mm which I beleive is the one they used on the k04.

[david_phillips95]

i have ordered up the RS4 fuel pressure regulating valve to see if i can get rid of the flat spot on B9 setting. The OEM valve limits the pressure to 130bar vs the RS4 valve that limits the pressure to 136bar. Near redline i have seen requested fuel rail pressure at 132bar but the actual rail pressure never goes much above 130bar then drops to about 127bar and builds back up to 130bar..therefore the OEM valve must be doing its job and opening and closing to stop the pressure exceeding 130bar. With the RS4 valve im expecting the requested fuel rail pressure to be met as the valve will stay closed up to 136bar. if there is a pressure surge it will still protect the fuel rail and open to release any pressure above 136bar. Ill keep you guys updated.

The valve in ETKA:

[bacillus]

That valve looks like a b*tch to install if you don't remove the intake manifold...

[cupra_k1]

I have fitted the RS4 valve to my car. It was a bit of pig to fit without removing the inlet manifold. I found sleeving a piece of 5/8 hose over the valve to spin it undone and removing it made light work of it though. I've not yet had chance to drive it hard enough to see if it has cured the dreaded flat spot but the car deffinately feels smoother and more responsive.

[djhorace]

It has been done on my car too.

This is the valve that came out.



Unfortunately I havent had the chance to run mine properly yet either.

[Hurdy]

I'm now running B7 T5 F9 and the car runs like an S.O.B.

I have had the RS4 valve fitted for a few months now and have also had the Forge K04 actuator fitted.

The Actuator took a fair bit of setting up, but now it is settled in it runs just great.

The RS4 valve ensures that the actual meets requested. Like others have already said, my car failed to meet requested between 0 and 5 bar, which could give issues with how the car runs (although I haven't felt anything).

The side effect of fitting the valve is that it helps with the low pressure in-tank pump. I found during logging that before the RS4 valve was fitted my in-tank pressure was dropping down to 3.5bar, which would affect it's ability to back up the high pressure rail system. Now the valve is fitted it doesn't drop below 3.9, so it has the ability to back-up the rail system faster.

[djhorace]

John - Did you get my text about setting up my car for Steve mate?

[robern2]

Hurdy,
isn't your boost 7 the equivalent of boost 9 due to your actuator fiddling ?

[Hurdy]

John - Did you get my text about setting up my car for Steve mate?

Yeah

I'll be down Tuesday afternoon to sort it

[RobH]

John - Did you get my text about setting up my car for Steve mate?

Are you still down south getting your car sorted.

[Hurdy]

Hurdy,
isn't your boost 7 the equivalent of boost 9 due to your actuator fiddling ?

Yup

Before the actuator I'd been using B9 T6 F6 and B9 T7 F9 & F6 (when trialling octane booster )

Both worked fine

[Hurdy]

John - Did you get my text about setting up my car for Steve mate?

Are you still down south getting your car sorted.

His car is here, but he's back home.

[djhorace]

Thanks bud. It will have an Evoms on it, so I am guessing Boost 9 Timing 6 Fuel 6 maybe? Bummed I wont be there to take it for its first blast with the Wavetrac, but I am sure it will be down the drag strip before I get back