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Model specific boards => Golf mk6 => Topic started by: neils mk6 on 18 September 2013, 21:37

Title: my gti turbo wont hold its boost
Post by: neils mk6 on 18 September 2013, 21:37

Hi lads just had revo stage 2 done today & my standard turbo wont hold its boost when asked by ecu, anY IDEAS ?  WAS ALSO TOLD MK6 TURBO NOT AS STRONG AS THE MK5 TURBO ,MY CAR HAS 27000 MILES& 2010 60 PLATE , STILL GOT LOADS OF TORQUE THOUGH AT BOTTOM END WHICH IS GREAT BUT RUNS OUT OF BREATH AROUND 5000 RPM, CHEERS NEIL

Title: Re: my gti turbo wont hold its boost
Post by: Poached on 18 September 2013, 22:03

The IHI Turbo is out of it's compressor efficiency in the upper RPM, it's a small turbo and the same was true of the MK5 KO3.

It is normal for the boost pressure to tail off towards the upper rpm range.

Do you have logs showing a disparity?

Title: Re: my gti turbo wont hold its boost
Post by: neils mk6 on 18 September 2013, 22:14

YES HAD HER ON THE ROLLERS TODAY , TECY GUY TOLD ME HE"D SEEN IT BEFORE ON MK6"S DUE TO HE SAID TO INFERIOR CHEAPER MK6 TURBOS ,  IS K04 THE NEXT STEP & HOW MUCH WILL THIS COST ME ? :sad:

Title: Re: my gti turbo wont hold its boost
Post by: wigit on 18 September 2013, 22:27

you checked the DV is not split, given the IHI out performs the old K03 motor hands down especially when mapped

Title: Re: my gti turbo wont hold its boost
Post by: Ess_Three on 18 September 2013, 23:04

Neil, any chance of turning your Caps Lock off?

Title: Re: my gti turbo wont hold its boost
Post by: RocketRossUK on 18 September 2013, 23:32

you sure its not the HPFP that can handle the request from the ECU rather than the turbo running out of boost?

Title: Re: my gti turbo wont hold its boost
Post by: wigit on 18 September 2013, 23:43

Quote from: RocketRossUK on 18 September 2013, 23:32

you sure its not the HPFP that can handle the request from the ECU rather than the turbo running out of boost?

HPFP is not an issue on the TSI motor plenty of headroom

Title: Re: my gti turbo wont hold its boost
Post by: Snoopy on 18 September 2013, 23:47

Check your diverter valve or just renew it its only about 35 quid.

Title: Re: my gti turbo wont hold its boost
Post by: Ess_Three on 18 September 2013, 23:56

More likely the DV than any turbo issues.

I've never heard of any tuner describe the IHI as 'inferior' either...considering they out perform the K03 on all levels.

Title: Re: my gti turbo wont hold its boost
Post by: RocketRossUK on 19 September 2013, 00:00

Quote from: wigit on 18 September 2013, 23:43

Quote from: RocketRossUK on 18 September 2013, 23:32

you sure its not the HPFP that can handle the request from the ECU rather than the turbo running out of boost?

HPFP is not an issue on the TSI motor plenty of headroom

Thought at stage 2 it might start lacking....but i believe you, props DV

I have a spare Brand New Rev G DV in my glove box. £30 posted if needed

Title: Re: my gti turbo wont hold its boost
Post by: Poached on 19 September 2013, 13:37

The IHI and KO3 are fairly similar in output.

Have you got any fault codes? P0299 will sometimes show.

Title: Re: my gti turbo wont hold its boost
Post by: neils mk6 on 19 September 2013, 20:48

thanks lads its going back next week to find out wot the prob is so will let you know asap !!!  cheers neil