MK5 Golf GTI
All Things Mk5 => Mk5 General Area => Topic started by: Max99 on August 06, 2013, 05:40:33 pm
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So I was wandering the other day what the optimum speed is for MPG ?
Off on a long road trip this weekend and not fussed how long it takes me when sitting on a motorway for hours so going to go for best MPG I can get.
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Mid 50's but its like pulling teeth, I've had late 30's from my Eddy at 60mph with Cruise on. Never again though. :grin:
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Wrong car!
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56
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I would say maintain where possible legal speed limit and most importantly move with the traffic. Don't become an obstacle. The MPG is what you get rather than what you aim for.
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ye thought maybe the case. Don't get me wrong 99% of my driving i don't give a hoot about mpg as i'm having too much fun :jumpmove:
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1500-2000rpm in highest gear, which works out to around 56mph.
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Mine is best from 50 to 53 to average 31+ mpg
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65mph should easily get you into the low 40's on either 95 or 99RON. I managed 40mpg doing 70mph (cruise control) everytime in the summer months from cheshire to Somerset in my GTI.
It not so much about the speed, its the way you accelerate and hold the speed (basically as gentle as possible and ease off rather than using your brakes, coast up to junctions using engine braking)
i'll say what I say in response to everyone who says "GTI wasnt designed for economy" - The FSI technology is all about maximising fuel economy through lean-burn combustion. It does very little / nothing for generating more power. :P
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Cruising at 65 I achieve at least 39/40 on a run using 99Ron fuel.
You have to drive smart!
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The FSI technology is all about maximising fuel economy through lean-burn combustion.
The TFSi doesn't implement stratified injection.
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0mph
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Then you wouldn't be getting any miles to the gallon.
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56
i have heard this also and tried it once. got low 40's out of the eddie but it was soooooo boring
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Then you wouldn't be getting any miles to the gallon.
:signLOL:
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Then you wouldn't be getting any miles to the gallon.
Only if you started the engine.
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The FSI technology is all about maximising fuel economy through lean-burn combustion.
The TFSi doesn't implement stratified injection.
Are you sure??
Best source I could find: http://en.wikipedia.org/wiki/Turbo_fuel_stratified_injection
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According to VW:
http://www.google.ie/url?sa=t&rct=j&q=&esrc=s&frm=1&source=web&cd=1&ved=0CC0QFjAA&url=http%3A%2F%2Fwww.volkspage.net%2Ftechnik%2Fssp%2Fssp%2FSSP_337.pdf&ei=hcsCUpuaGIPX7Aa0kYHICA&usg=AFQjCNE2Gvyauf6U_4_7Vz8wfE9GsHB4kQ&sig2=pjj9dhEmx0_QI2xIkZNjFA
This is for the AXX engine too - some people have stated previously that the AXX did run stratified charge, but it was removed in the BWA. So this would debunk that theory.
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According to VW:
http://www.google.ie/url?sa=t&rct=j&q=&esrc=s&frm=1&source=web&cd=1&ved=0CC0QFjAA&url=http%3A%2F%2Fwww.volkspage.net%2Ftechnik%2Fssp%2Fssp%2FSSP_337.pdf&ei=hcsCUpuaGIPX7Aa0kYHICA&usg=AFQjCNE2Gvyauf6U_4_7Vz8wfE9GsHB4kQ&sig2=pjj9dhEmx0_QI2xIkZNjFA
This is for the AXX engine too - some people have stated previously that the AXX did run stratified charge, but it was removed in the BWA. So this would debunk that theory.
Sure looks that way in that link. I'm sure one of the tuners on here talked about the TFSI going into lean-burn mode when cruising. Maybe this is separate from the missing FSI tech :surprised:
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The FSI technology is all about maximising fuel economy through lean-burn combustion.
The TFSi doesn't implement stratified injection.
Got this from the Wikipedia page but also read the above post and link. Does nothing to clarify does it! :rolleye:
2.0 R4 16v TFSI 125-199kW[edit source | editbeta]
This turbocharged EA113 engine is based on the naturally aspirated 110kW 2.0 FSI.
identification
parts code prefix/variant: 06F.C, 06F.D
engine displacement & engine configuration
1,984 cubic centimetres (121.1 cu in) inline-four engine (R4/I4); bore x stroke: 82.5 by 92.8 millimetres (3.25 in × 3.65 in), stroke ratio: 0.89:1 - undersquare/long-stroke, 496.1 cc per cylinder, compression ratio: 10.5:1
cylinder block & crankcase
CG25 grey cast iron with liquid-blasted cylinder bore honing; 88 mm (3.46 in) cylinder spacing, five main bearings, die-forged steel crankshaft, two simplex-roller chain driven balance shafts
cylinder head & valvetrain
cast aluminium alloy; modified inlet duct geometry for high tumble values providing superior knock resistance, four valves per cylinder (exhaust valves sodium filled for increased cooling), 16 valves total, low-friction roller finger cam followers with automatic hydraulic valve clearance compensation, belt and roller-chain driven double overhead camshaft (DOHC), continuous intake camshaft adjustment (42° variance from crankshaft)
aspiration
hot-film air mass meter incorporated into air filter housing, cast alloy throttle body with electronically controlled 'drive by wire' throttle butterfly valve, plastic variable length controlled intake manifold with charge movement flaps adjusted by a continuous-action pilot motor, 0.9 bars (13.1 psi) boost water-cooled BorgWarner K03 turbocharger (K04 on 169 kW upwards) incorporated in exhaust manifold, sandwiched central front-mounted intercooler (FMIC)
fuel system
fully demand-controlled and returnless; - fuel tank–mounted low-pressure fuel pump, Fuel Stratified Injection (FSI): inlet camshaft double-cam driven Hitachi single-piston high-pressure injection pump maintaining a pressure between 30 to 110 bars (440 to 1,600 psi) in the stainless steel common rail fuel rail, four combustion chamber sited direct injection sequential solenoid-controlled fuel injectors, air-guided combustion process, multi-pulse injection with homogeneous mixing, stratified lean-burn operation with excess air at part load
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Wikipedia versus a VW AG publication. Take your pick. The VW doc is from 2004: maybe things have changed since then, I don't know.
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Okay so one way on my 3 hour trip I drove normally i.e quite quickly got about 34mpg
Way back cruise control majority of the way set at like 68 mph ,, got 35.4 mpg ... so basically just drive how you enjoy ;)