MPG Economy For 928's???
05-15-2016, 10:35 AM
#31
Burning Brakes
On a highway trip to sharks on ice( mountain highway) , with my wife ( speed control) my GT averaged 29 mpg( imperial galleon) over 1200 miles . With the cams and exhaust Colin was able to add a lot more timing , we had just changed to 42# injectors and had not fine tuned it so we were running too rich . So cams + exhaust + sharktune = better mileage
05-15-2016, 05:12 PM
#32
Racer
Thread Starter
Terry GT,
Are you serious about your MPG's? That's amazing! How is your set up on your car? 5-speed? Original motor? TT or supercharged? Please spill the beans!!!!!!
Ricardo Vega
Are you serious about your MPG's? That's amazing! How is your set up on your car? 5-speed? Original motor? TT or supercharged? Please spill the beans!!!!!!
Ricardo Vega
05-15-2016, 08:23 PM
#33
Burning Brakes
All GTs are 5 speed manual
original motor
A S4 5 speed with the mods would get even better mileage with its taller gears
mods as per signature
no beans required
original motor
A S4 5 speed with the mods would get even better mileage with its taller gears
mods as per signature
no beans required
05-15-2016, 10:45 PM
#35
Rennlist Member
Join Date: Oct 2005
Location: Gatineau, Québec, Canada
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I get an average annually (May to October) of about 13 L/100km (city/highway).
Which is 18 miles US mpg or 21.7 Imperial mpg.
I do each year around 10 L/100km driving to Frenzy (2000 km).
Which is 23.5 US mpg or 28.2 Imperial mpg.
Which is 18 miles US mpg or 21.7 Imperial mpg.
I do each year around 10 L/100km driving to Frenzy (2000 km).
Which is 23.5 US mpg or 28.2 Imperial mpg.
Last edited by Bertrand Daoust; 05-16-2016 at 07:08 AM.
05-16-2016, 08:50 AM
#36
Rennlist Member
Related, at a buck forty on the A6 autobahn last weekend my computer showed 5.9 mpg. Has anyone else looked during high speed runs? My buds with modern M3 and RS5 still get ~16 mpg at those speeds. So I don't know whether to write it off as my car's just old and has crappy fuel management or if there's a problem.
My E61 M5 very modern engine - V10 -507ps - over 32,000km I averaged 14.8ltrs/100km or 19.8mpg. However, the best ever was 11.8ltrs/100km 24mpg from Calais to Nurburg and the worst was at the Nurburgring where it did 58.3ltrs/100km which is 4.85mpg
My 996 GT3 with K400 Manthey engine would average 9lts/100km at 120km/h 31.4mpg and 11ltrs/100km 26mpg at 160km/h But the car is super slippery
My 928 GTS 5-spd would average about the same numbers as the M5
My E46 M3 would be about the same as the GT3
05-16-2016, 11:42 AM
#38
Intermediate
Join Date: Apr 2015
Location: Southern Ontario
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1989 S4 A/T
I generally average 13.5 l/100km (17USmpg) combined and 9.5 l/100km (25 USmpg) highway. The numbers could likely be better but it is hard keep off the go pedal.
I generally average 13.5 l/100km (17USmpg) combined and 9.5 l/100km (25 USmpg) highway. The numbers could likely be better but it is hard keep off the go pedal.
05-16-2016, 02:39 PM
#39
Inventor
Rennlist Member
Rennlist Member
Best I've seen is 25.5 mpg hwy, avg. 70 mph, in a chipped '85 5-speed I had a few years ago. It had a Y-pipe made from stock down pipes into a '84 single cat back and gutted pumkin - 2.5" X-pipes are too big for good part throttle velocity which hurts best possible mileage.
My chipped X-pipe S4 5-speed gets around 24 hwy @ 70 mph, but it does not have the belly pans (or radiator flaps).
My automatics never got over 22.
Note the fine print: imperial beans vs. USA beans. 29 imperial = 35 US, which isn't probable.
My chipped X-pipe S4 5-speed gets around 24 hwy @ 70 mph, but it does not have the belly pans (or radiator flaps).
My automatics never got over 22.
Note the fine print: imperial beans vs. USA beans. 29 imperial = 35 US, which isn't probable.
05-16-2016, 02:58 PM
#40
Inventor
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https://rennlist.com/forums/928-foru...s-88-89-a.html