All Things Mk5 > R-Tech Zone

Stage 2 or 2+ ???

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griff30:
Just thought Id chuck this out there and see if there are any comments to help me decide!   Ive got an Edition 30 which has had an RTECH stage 1 map for a few years. Recently added a BCS Full powervalve system so now keen to get an intake kit on it then get it back up to RTECH for a stage 2 map (been wanting to get the inlet clean and injector test anyway).   
   Ive always been keen to get a better IC (probably airtec stage 2) for a nice safe consistent setup, and need to change the thermostat so now’s the time to do it.
  So question is: Is there any sense in staying at stage 2, or is it just silly to not get the HPFP as well and go the whole way with it?   I only use the car on the road, and want it to be reliable and last a while. Even with B12s and ALK it seems on the edge of usable traction already anyway. Any thoughts appreciated cheers!

Dave J:
Sounds as though you have a nicely set-up ED30 already. I think you are wise to want the inlet clean & injector test - want to get this done on mine...

I'd say an IC upgrade just helps maintain the best of what the car can do - I can feel the heatsoak on my Stage 1 Revo on summer days. I have a Loba HPFP on mine even at Stage 1 as I read some cars experience fuel cuts. I bought it with an aspiration of going Stage2 or more. However, I think Stage 2 will be enough for me. As I expect you know, Stage 1 is more than enough to overwhelm the front tyres - I have B8's & SALK, so quite similar to yours. The thing that I like is that once you're rolling, the power increase is very noticeable & the in gear performance is massively different. I never launch off the line - it's the in gear power that interests me.

Personally, driveable power is better than peak power. I have read of people saying their car drove better at Stage 2 than 2+. Problem here I guess is personal preference!

Nice choice on the exhaust - if I had my time again I think I'd have gone for BCS...

Dan_FR:
The HPFP unlocks huge torque in the middle of the RPM range and I would say is wholly worth it... However if you are manual, unless you have an almost new clutch or an upgrade, it will likely slip and limit what can be achieved

colesey:
If your focus is on midrange drivability and response for road use, then I would stick with stock airbox / upgraded downpipe & hpfp / s3 intercooler.

pudding:
2+ gets a nice big flat spot around 2500-3000rpm when you give the right pedal a full portion of lead.   This is because the K04 is a bit of a sh*t turbo for tuning really.  Stock 0.9 - 1.2 bar (ED30 vs S3) boost is fine as it's under the surge line, but tuners push them to 1.7 - 2 bar, and the way the KO4 spools up, it overwhelms the engine at that VE point at WOT. 

To get around this, tuners peg the boost back in that rpm/load region, hence the big flatty.

You get used to it and learn to drive around it though.  The only fix is a better turbo, which has either a ported shroud, or a bigger compressor wheel to move the surge point.

If you want a long lasting road car engine, I personally would not be running the 400+lbft cylinder pressures R Tech like to cram into these engines, but each to our own.  It's easy to achieve, but not easy to hold indefinitely with stock internals.

APR is the best intercooler, but is also ridiculous money.   As above, an S3 will be a lot better than a GTI one, but again, that was designed for 1.2 bar, not 1.7 - 2 bar.  Running that kind of boost the little cotton reel KO4 is basically a giant hairdryer super soaking the IC.

If I could redo my ED30, I would stay Revo 1 and Ohlins Coilovers, and that's it.  Nothing else.

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