We Got our First Polo GTI in today...

[Transporter]

I would have thought it was quite obvious from my reply that I read the whole of his "apology".

This is from the end of his post;

"Once again I apologise to GTI JOE for his experience and thank him (although not the form of which I prefer to receive a complaint) and wish him all the best with his car in the future. If he or any other member wishes to discuss an experience in our dealership (good or bad) feel free to email me at dblackwood@bayford.com.au

Regards,David Blackwood"

and here is the shortcut to complete post http://www.vwwatercooled.org.au/f128...tml#post598533

[pologti18t]

Regarding how ''behind'' we are... case in point:



meh. and textbooks from 1924, delivered on a trolley by a state library employee wearing special gloves, will for ever be the only scholastic/academic authority...

(p.s. no insult intended, but i dont really presume that you'd get that... rather, turn it into a "cool comeback".)

We are talking about unreviewed site.... not peer reviewed reference books - lol

I reckon half the questions on this site could have been easily answered if the originator of the post had:
1. RTFM.
2. Spoke to the dealer.
3. Read the purchase contract.
4. Typed the keywords of the query into Google and done the research themselves.

In 1924 terms these are nothing like the revered texts in the library and more the "letters to the editor" of the local rag

[Transporter]

No useful conversation was deleted, not even negative one. Just stay on topic!

[Capercat]

It would be interesting to try the 150kw APR 1.4TSI upgrade in the Polo Gti.

Is this possible? I checked APR's site and didn't see the Polo GTI mentioned.

[triode12]

Is this possible? I checked APR's site and didn't see the Polo GTI mentioned.

There will be one shortly since the tune for the GT basically the same (same engine).

[Corey_R]

and the Golf 118TSI...
all three just tuned for slightly different purposes.

[weedub]

Me too. Got a new Polo GTI coming. Not only want to upgrade it - I want to know if it can be reconfigured to compound charge. i.e. with turbo feeding the SC. Anyone know if this can be done?

[Corey_R]

That sounds like a pointless exercise, at least with the stock hardware. Superchargers start earlier in the rev range and drop off at higher revs. Turbos start higher in the rev range and usually run through to the redline. So the turbo won't be spooled up yet when the supercharger is running and then the supercharger has lost its efficiency when the turbo is on boost. Hence why VW have them switching over at a certain RPM.

[weedub]

I agree the stock hardware may not work but I am not convinced that the principle can't be workable. There is lots of info out there on the subject. Eg: 8v 2l Twin Charged -my Little Project - Alfa Romeo Bulletin Board & Forums

Rather than sequential in a compound configuration - The turbo should spool earlier as it is driven from more flow from the SC at low revs. When the revs are high the control valve could be used to drop out the SC at high revs.

I'd like to hear from APR on the subject.

[Corey_R]

I can't read a 82 page thread...
but in all the examples he mentioned, there is still switching happening. The "compound" section is the turbo boosts the supercharger then as soon as the supercharger is inefficient, it switches to the turbo only.

Interestingly he notes that the Golf does this too! So maybe the turbo is already in the path and therefore the Golf is already doing what you want it to be doing...

[Corey_R]

Ok... so looking at the VW "Self-study programme 359 - 1.4L TSI Engine with Dual-charging", the way it works is this:
1) You have fresh air coming into an air filter
2) You then have the mechnical supercharger with a "parrallel path with regulating flap unit J808" - the position of the regulating flap determins whether the air flows via the supercharger and/or straight to the turbo.
3) Charged/Fresh Air flows through the turbo
4) Charged Air flows via the intercooler into the throttle valve module into the intake manifold.
5) Exhaust gas flows through the turbo (or wastegate) into the downpipe, through the catalytic converter and out the exhaust.

So this confirms that the 1.4TSI is already a "compound" system with the turbo always in the chain and the supercharger being bypassed once its lost its efficiency - just as the Alfa dude you linked to suggested.

[weedub]

Noted.

Still looking forward to an APR tune for the Polo GTI though

Cheers

[chylld]

Still looking forward to an APR tune for the Polo GTI though

+1

Can anyone point me in the direction of an accessories price list for the Polo GTI? Thinking of trading in my bimmer at the end of this year.