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Old 04-20-2021, 08:15 AM   #2 (permalink)
Vekke
Mechanical engineer
 
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Join Date: Jan 2009
Location: Kitee (Finland)
Posts: 1,244

Siitin - '98 Seat Cordoba Vario
90 day: 58.56 mpg (US)

VW Lupo 3L --> 2L - '00 VolksWagen Lupo 3L
Diesel
90 day: 104.94 mpg (US)

A8 luxury fuel sipper - '97 Audi A8 1.2 TDI 6 speed manual
90 day: 64.64 mpg (US)

Audi A4B6 Avant Niistäjä - '02 Audi A4b6 1.9tdi 96kW 3L
90 day: 54.57 mpg (US)

Tourekki - '04 VW Touareg 2.5TDI R5 6 speed manual
90 day: 32.98 mpg (US)

A2 1.4TDI - '03 Audi A2 1.4 TDI
90 day: 45.68 mpg (US)

A2 1.4 LPG - '02 Audi A2 1.4 (75hp)
90 day: 24.67 mpg (US)
Thanks: 259
Thanked 803 Times in 391 Posts
Forget "better" charge aircoolers, if you want better efficiency buy a efficiency chip tune. And from a tuner who is specielized in efficiency. -10% is easy which most ecu tuners can reach, but there is usually even more available.

If the size is same very little room for improvement of efficiency, smaller fins help little. You migth get few more horsepower, but for fuel efficiency impact under 1%.

My best in my 4wd 2.5 tdi touareg has been 5,4l/100km at 100 km/h speed. Some ideas here. Whole underside is flat in that, but no pics from that. https://www.facebook.com/media/set/?...82242155122992
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Vesa Tiainen innovation engineer and automotive enthusiast
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