APR ECU queries

[clicht]

1.1 bar is the nominated boost for the K03 Turbocharger (as found on your Polo), you will achieve more than requested briefly, depending on a bunch of variables, but that is where the K03 is sitting in its efficiency / safety range.

Hi,
I have noticed that you represent APR. Firstly its a very good product.
You mentioned in a post, "1.1 bar is the nominated boost for the K03 Turbocharger (as found on your Polo), you will achieve more than requested briefly, depending on a bunch of variables, but that is where the K03 is sitting in its efficiency / safety range."
If you dont mind, please can I enquire on:
1. What is the max boost that the k03 can peak at, and what can it maintain...
2. Is there any way I can review what was chnaged with the map...

Thanks

[dArK5HaD0w]

On a Mk6 GTI, what would this equate to in PSI? Sorry for my ignornace!

1.1 bar = 15.9541512 PSI

...courtesy of google

[Guy_H]

No problems,

You must remember boost is only a very small part of a performance remap, so concentrating on boost could lead you to something that is undesirable.

A K03 turbocharger is a relatively small turbocharger, but it is designed to work with the engine that VW have specified for it.

This link might help understand (you need to read into it to get a grasp of how to read the turbo map, but its a pretty straight forward article) VW GTI Forum / VW Rabbit Forum / VW R32 Forum / VW Golf Forum - Golfmkv.com - View Single Post - K03 Compressor Map

I can make your Polo hit 27 psi, but it would probably be the slowest (spikes hard), most un-driveable, torque lacking thing you could imagine, we can give you a map that peaks at 1.1 bar, has a fantastic torque curve and in real driving terms, be the fastest & smoothest Polo around. Boost generally tapers down to around 8-9 psi by redline. Push it past that & the exhaust gas temperatures (and the intake ones) increase rapidly & apart from making less HP, you shorten component life enormously.

You can log your maps with VCDS, that will show what you in real terms what your car is doing (boost, fuel air etc), but no tools that I know of that allow you to look at individual map comparisons with our product.

Hopefully when you look at that K03 & K04 map overlayed, it will help explain for you.

---------- Post added at 12:47 PM ---------- Previous post was at 12:42 PM ----------

Requested boost (which is the reference of 1.1 bar) is very specific to the actual vehicle & software. It may be 1.12 bar for model X, etc.

A typical K04 Turbo charger runs ~ 1.4 bar for comparisons sake.

Saying that, you will generally always see a boost spike that will measure above the requested (could be 3 - 4 psi), but the best way to see what your engine is doing is log requested vs actual boost directly. This will also give you an insight to what strategies your tuner has used in respect to boost control.

Also when running yor car on the dyno, always pay close attention to your torque increases & the shape of the curve. That's much more important than a peak HP number.

[clicht]

No problems,

You must remember boost is only a very small part of a performance remap, so concentrating on boost could lead you to something that is undesirable.

A K03 turbocharger is a relatively small turbocharger, but it is designed to work with the engine that VW have specified for it.

This link might help understand (you need to read into it to get a grasp of how to read the turbo map, but its a pretty straight forward article) VW GTI Forum / VW Rabbit Forum / VW R32 Forum / VW Golf Forum - Golfmkv.com - View Single Post - K03 Compressor Map

I can make your Polo hit 27 psi, but it would probably be the slowest (spikes hard), most un-driveable, torque lacking thing you could imagine, we can give you a map that peaks at 1.1 bar, has a fantastic torque curve and in real driving terms, be the fastest & smoothest Polo around. Boost generally tapers down to around 8-9 psi by redline. Push it past that & the exhaust gas temperatures (and the intake ones) increase rapidly & apart from making less HP, you shorten component life enormously.

You can log your maps with VCDS, that will show what you in real terms what your car is doing (boost, fuel air etc), but no tools that I know of that allow you to look at individual map comparisons with our product.

Hopefully when you look at that K03 & K04 map overlayed, it will help explain for you.

---------- Post added at 12:47 PM ---------- Previous post was at 12:42 PM ----------

Requested boost (which is the reference of 1.1 bar) is very specific to the actual vehicle & software. It may be 1.12 bar for model X, etc.

A typical K04 Turbo charger runs ~ 1.4 bar for comparisons sake.

Saying that, you will generally always see a boost spike that will measure above the requested (could be 3 - 4 psi), but the best way to see what your engine is doing is log requested vs actual boost directly. This will also give you an insight to what strategies your tuner has used in respect to boost control.

Also when running yor car on the dyno, always pay close attention to your torque increases & the shape of the curve. That's much more important than a peak HP number.

Brilliant, thanks Guy