« previous next »
Pages: [1] 2

Author Topic: Interesting read  (Read 3462 times)

Offline mcmaddy

  • Forum addict
  • *
  • Posts: 5,277
Interesting read
« on: 10 October 2016, 22:24 »
Logged
TCR, Pure Grey, DCC, Dynaudio and Climate Screen.

Offline Exonian

  • Serious forum addict
  • *
  • Posts: 9,293
Re: Interesting read
« Reply #1 on: 11 October 2016, 05:32 »
Good find.
Interesting reading.
That engine would be amazing in a Polo!
Logged
‘25 8.5R, ‘23 8R, ‘20 8CS, ‘19 135iX, ‘19 TCR, ‘17 Ed40, ‘17 GTD, ‘15 7R, ‘13 GTI PP, ‘11 GTI, ‘09 GTI, ‘98 Ibiza Cupra, ‘05 GTI, ‘06 Polo GTI, ‘04 GT TDI, ‘05 Fabia vRS, ‘02 GTI T, ‘03 Ibiza TDI 130, ‘01 Leon 180, ‘89 mk2 16v, ‘99 Ibiza TDI, ‘96 VR6, ‘98 Ibiza TDI, ‘92 VR6, ‘88 mk2 8v, ‘92 Polo G40, ‘91 mk2 8v, ‘89 mk2 8v, 205 GTI 1.9, ‘83 mk1 GTI, ‘80 Scirocco GTI, plus some others I’ve forgotten 

Offline monkeyhanger

  • Serious forum addict
  • *
  • Posts: 6,663
Re: Interesting read
« Reply #2 on: 11 October 2016, 07:38 »
We'll have to wait for those real world economy figures. Downsized engines perform very well in test conditions for fuel economy (and emissions - less fuel used = less CO2). In the real world though, a small engine being pushed hard all the time doesn"t usuall give much real benefit. Ford's "miracle"140ps 1 litre unit in the Fiesta is quite thirsty in reality and my wife's A1 1.6TDI 116ps is barely more economical than the A3 Saloon 2.0TDI 150ps I had as a courtesy car recently (there was no more than 2mpg in it).
Logged
Whey ya bugger! It's finally arrived after an 8 month wait....
MK7 R 5 door, manual, Lapiz Blue, Prets.

Offline fredgroves

  • Serious forum addict
  • *
  • Posts: 7,932
  • Professional Um Bongo drinker
Re: Interesting read
« Reply #3 on: 11 October 2016, 08:59 »
Its an interesting piece for sure, my only comment really is that there is a big difference between making something work and having a design that is robust enough for mass production - when I say robust, I mean isn't going to cost the manufacturer a fortune.

At every major stage of miniaturisation there are usually associated production issues.

I remember the first attempts at putting diesels into modern cars...

Re the supposed fuel economy gains - maybe its not about a couple of mpg improvement on a single vehicle, maybe its about the environmental effect of 500,000 vehicles with 2mpg improvement over ~3 years... also the Co2 figure (for both the manufacturer's CO2 targets (which they all have) and the consumer in pollution tax).

I think a lot of petrol heads look at cars in a one dimensional way, when its much more complex.
Logged
Current: Mk8 GTI DSG, Adelaides, DCC, HUD, HK, Winter Pack, Rear Camera.. Aka "HMS Weasel"

Gone: 2017 Mk7.5 GTD,manual, NavPro
Gone: 2014 Mk7 GTD, manual, NavPro, DCC

Offline boydeee

  • Not said much yet
  • **
  • Posts: 65
Re: Interesting read
« Reply #4 on: 11 October 2016, 09:16 »
Interesting piece! Did anyone else notice the quoted weight? 1545kg?! Surely not...
Logged

Offline Daz Auto

  • I live here
  • *****
  • Posts: 1,120
  • Other brands of washing powder are available.
Re: Interesting read
« Reply #5 on: 11 October 2016, 10:21 »
The Polo GTI used to have a 1.4 Supercharged engine. Many users reported issues with it consuming a lot of oil. It was replaced with a more powerful and economical 1.8 engine.

It will be interesting to see what filters down into actual production cars. Audi are using 1.8 engines with Miller cycle technology to improve economy. The new 1.5 litre petrol engine may have a variable turbo - currently used by Porsche. The variable turbo is supposed to flatten the power/torque curve. It would be nice to see those 2 technologies combined in a mass produced VAG engine.
Logged

10/8/2017 - GTI Performance, Red,5dr DS

Offline joe6

  • I live here
  • *****
  • Posts: 902
Re: Interesting read
« Reply #6 on: 12 October 2016, 14:43 »
Interesting read. The 1.4 TSI (160) engine in the early Scirocco worked on a similar principle - supercharger from 1500rpm to deal with turbocharger low power and lag at low revs. Supercharger provides varying amounts of power up to 3500rpm then turbo only. Difference is that the supercharger is engine belt powered via a magnetic clutch rather than electric motor. The engine had some problems causing engine rebuilds - low spec pistons that cracked, plug gap initially incorrect giving misfires from new that required different spec plugs and an ECU flash (but not the oil consumption problems of the 1.4 Polo GTI) and all took VW sometime to sort out that I think was probably because of insufficient pre-production testing. Economy figures did not live up to promises with little difference between this engine and the Mk6 GTI. Stage 1 tune can produce over 200bhp up from 160bhp.

Not sure how durable small engines producing large power will be though?
« Last Edit: 12 October 2016, 14:52 by joe6 »
Logged
Mk6 GTI Carbon Grey, 2010 Bluetooth and voice fitted, a few VCDS mods still a comfortable family car. Red Scirocco 2011 twin charger stage 1 - enjoyable drive now gone.  White 2016 Polo GTI (roller skate on steroids) replaced with an Indium Grey 2019 7.5 GTI PP.

Offline monkeyhanger

  • Serious forum addict
  • *
  • Posts: 6,663
Re: Interesting read
« Reply #7 on: 12 October 2016, 19:57 »
Quote from: Daz Auto on 11 October 2016, 10:21
The Polo GTI used to have a 1.4 Supercharged engine. Many users reported issues with it consuming a lot of oil. It was replaced with a more powerful and economical 1.8 engine.


It was horrendously unreliable - it was a 1.4TSI twin charge, with the Supercharger kicking in and out on a clutch before the turbo was fully spun up, also used in the Golf and Scirocco in 170 and 160ps flavours. cracked piston crowns from mistimed detonations was a big issue
Logged
Whey ya bugger! It's finally arrived after an 8 month wait....
MK7 R 5 door, manual, Lapiz Blue, Prets.

Offline GTI_Ant

  • GTI forum regular
  • ***
  • Posts: 188
Re: Interesting read
« Reply #8 on: 12 October 2016, 21:07 »
Agreed the 1.4 twin charge motor was a pup.  A colleague had blown valves and a new engine at 30K miles.  This 3 cylinder motor would work well in the Up! and as the car is fairly cheap it won't matter (to some) if the head blows off at 60K miles.
Logged
GTi Clubsport DCC winter pack rear camera
Previous:
7.5R 3dr DSG DPB Prets Dynaudio
MK7 GTI PP Tungsten Silver Manual Nav Dynaudio Winter Pack Park Assist

Offline flashp

  • Not said much yet
  • **
  • Posts: 14
Re: Interesting read
« Reply #9 on: 13 October 2016, 18:11 »
A next gen ultra light weight 4wd system would be great with this. A Polo R maybe??
Logged
Pages: [1] 2
« previous next »