Golf R flutter or compressor surge (vids included)

[John2204]

So I have noticed a flutter while in D mode on 40-50% throttle in the lower revs (4th-5th-6th gear).
The car struggles/revs hang for a few seconds then picks up and goes. APR tune. Please see below.

Any ideas? Mods in sig.

[buzuki]

looks like a tune issue. dumping all boost while shifting into 5th . . .

[grtuned]

Good vid!!! Losing boost 100% could be faulty valve?? Check faults. If you decide to replace valve and still there then possibly get it re-flashed back to standard and test. Something is wrong for sure you need to decide which way to find out.

[Guy_H]

Change back a gear, don't load such low revs or it will flutter (with any tune, even standard VW software) - remember you have a K04 on that car - The DSG makes it worse as it forces itself up gears (economy mode) where in a manual transmission you would never do it. An open intake makes it more audible (even on a stock car) - we can also reprogram your DSG so it's more pro active and will do a much better job at keeping you in the correct gear

[buzuki]

its in 'D' mode,

are you suggesting he drives it in manual mode to hide a tune issue? There is no reason it should flutter under load, as he is not backing off throttle.

[Candyman]

its in 'D' mode,

are you suggesting he drives it in manual mode to hide a tune issue? There is no reason it should flutter under load, as he is not backing off throttle.

The R will flutter under load, stock !

I could make mine do it on demand

As much as I don't intend to defend APR, it happens, stock

The R and and D mode is stupid. Drive it.

[John2204]

Change back a gear, don't load such low revs or it will flutter (with any tune, even standard VW software) - remember you have a K04 on that car - The DSG makes it worse as it forces itself up gears (economy mode) where in a manual transmission you would never do it. An open intake makes it more audible (even on a stock car) - we can also reprogram your DSG so it's more pro active and will do a much better job at keeping you in the correct gear

You got me all curious about the DSG reprogram.

[boltor]

You got me all curious about the DSG reprogram.

Same here.

@ APR - Does a DSG tune come with your Stage 1 tune?

[noone]

Looks like about 1800rpm.
How much boost are you expecting below 2k rpm?
Makes sense you are hearing the airflow whilst the diverter is open.

I don't see why the DSG would drop you into a gear where the revs are too low for decent power, the joys of trying to get economy from a performance vehicle?

Pretty sure DSG tuning is separate from ECU tuning.

[Candyman]

No, a number of tuners can modify torque limiters in the DSG via the ECU

[noone]

Sure, maybe what I should have said is that engine mapping and DSG mapping are separate items. The ECU is just a computer. i have recently been battling through ECU issues in my GF's Peugeot 206 GTi, they were smart enough to break down the brains over 2 modules which need to be keyed alike to work. Can't just swap one out...

[boltor]

No, a number of tuners can modify torque limiters in the DSG via the ECU

Exactly. Just interested in whether APR is now doing this (like a few others)

[John2204]

Can I just say that the issue was not there when I was on the stage 2 map with a Carbonio intake.

[tonymy01]

The Carbonio isn't really an intake, the stock air box assembly has baffles etc in it to help reduce the noise coming back through the system from the BOV/diverter valve etc, wacking on a pretty carbon piece to the front of it really isn't doing much (compared to complete replacement of the system with VWR/etc). So it may have been there but hidden away a bit (as Candyman says, under the right conditions he can get his stocker to do it, I guess the sound is just a bit more subtle with the stock air-box/filter assembly vs the complete intake replacement).

[grtuned]

It look to me in the vid that during acceleration you would lose boost not a gear change loss in rpm. If your applying throttle you should have no boost loss if you do something's wrong!! No car flutters or loses boosts while accelerating. Never seen it on any stock standard golf old or new!!!



Sent from my iPhone using my fingers.