All Things Mk5 > R-Tech Zone

Stage 2+ K03 best mods/ expected figures

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Dan_FR:
2+ is great, turbo response is fantastic, more like a TDI and a typical petrol turbo - any revs and gear and it just picks up and goes. Don't expect your clutch to last though

greygti:
Loved my gti when it was ko3 stage 2+ it made 281 bhp and 356 lbft it was a quick car at that level of tune

MS1:
Well had a bit of a gutting time at R-Tech, never thought I'd say that and it's nothing to do with R-Tech more having the wrong set up and apparently not having a 'healthy car', which I wish I'd known before I went to be honest.  :rolleye:

Apparently the Forge Twintercooler is way to big a setup for a Ko3 turbo and thus I'm losing loads of torque, especially low down. So Niki has advised me to switch to an uprated S3 IC which should realise 30-40lbft of torque. Again wish I'd know this before the 500 mile round trip. I was honest with my mods prior to my visit, promise!  :phew:

Also the engine is overly rattly on the cam side, which I knew, but had always been advised wasn't an issue as the car ran will, Niki tells me it's time to change the cam chain et al and others have confirmed that a bad cam chain/adjuster can cause engine inefficency.

Further still Niki explained how my previous mapper had loaded the fuel ratio up so much in my tune, that the engine had likely been washing itself with fuel (apparently the fuel smell from the oil stung his eyes)  as a consequence the turbo had been running really hot. Did I mention that there's a crack in the turbo housing  :pomppomp:

Car made 284bhp and 307lbft. Niki tells me with all the hardware I've got, that's 50-60lbft shy of where the car should be at. To be honest I wasn't expecting those sort of gains, I guess in my head I'd anticipated something like 290/330 or 280/340 etc.

I love my car and round the Devon twisties it's exactly  what I need, quick spool up, just enough power for a fwd and maximum driveabilty from 30-90mph. So I've decided to go ahead with the cam chain replacement, sorting an uprated Darkside S3 IC and will most likely replace the turbo. I think AET sell the ko3 for £350, if not VW are £519.

AJP:
At least you know where you're at with the engine, if you look at the positive side. If you hadn't taken it to R-Tech you might have carried on blissfully unaware of the issues and ended up with bigger problems down the line.

Interesting what you say about the intercooler. It's on my to-do list to uprate mine and up to now I haven't been sure of the best solution for a k03 - so it's good to know that the S3 one is a good choice.

Anything in the 280s is good peak power on a k03, but like you say you should be closer to 350lb/ft. It's the low and mid range torque that makes a k03 so good to drive.

Best of luck getting it all sorted mate.

MS1:
I agree, the top end power means f*ck all to me. So the car accelerates great from 90-130mph, but when is that ever useful. The best apart about the ko3 is what I'm missing, low down torque. You're right though, I have to look on the brightside. Hopefully others will realise the Forge Twintercooler is not the way to go, mind you if anyone with a ko4 (which apparently is the only set up the IC is really useful for) is looking for a Twintercooler you can have mine!

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