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MPG Query and now running better
Posted: Tue Oct 10, 2006 7:22 am
by Highfield
I seem to have gotten over my initial battery issue (for now!), and will get Tuthills to replace when I visit next week to have the outstanding odd jobs done to the car (waxoyl, carpet, wheel centre etc.).
When using it yesterday, I was running as follows :-
80mph
3,800 rpm
180 temp
60-65 psi oil
Do the above look correct figures ?
There is a slight misfire under heavy load, so will get Tuthills to check through plugs, leads, cap, webers etc.
I also averaged 16.8mpg on the webers for first 175 miles - what should I be getting for a 'sensible' first run - i.e. not using full throttle all the time ?
Thanks for bearing with all these newbie to 911T questions.
Posted: Tue Oct 10, 2006 7:39 am
by Gary71
Hi Ian,
All the numbers sound good
16.8mpg is a bit high though...
On a decent run, not thrashing it, when properly warmed up I can get 25+ Give it a bit of right foot and this can drop below 20 but I do have to try pretty hard. However with a proper cold start and running to and from work barely getting it warmed up it does about 10
Posted: Tue Oct 10, 2006 8:59 am
by Highfield
thx Gary.
I got 25mpg from my 3.2 so 16mpg looks poor.
will run for a couple more fills and see what I get.
I used Tesco 95 - is this OK?
Posted: Tue Oct 10, 2006 9:37 am
by Bob_Salmon
Don't expect the sort of MPG figures from an older engine to be anything like as good as a newer 3.2. POrsche have always managed to make their engines more efficient (if sometimes less fun) using ever more sophisticated electronic management systems.
I used to 'enjoy' 17mpg from my 2.4S on a good run, but that would go down to 7mpg on a track!
Afraid you have to pay for the fun factor.
Bob
Posted: Tue Oct 10, 2006 10:47 am
by hot66
with my 2.4S, on the run to LeMans I managed about 20mpg ... & as you might have seen from another of my threads that might be whilst still running on the rich side. 16mpg is a bit poor
Posted: Tue Oct 10, 2006 11:44 am
by Mick Cliff
I'm with hot66 - 20mpg average; 16-17 in anger (but even less on track)
Think of it as
Smiles per gallon
Posted: Tue Oct 10, 2006 12:26 pm
by impmad2000
It will be interesting to see how the fuel consumption figures change on Gary's car with ignition and fuel under ECU control.
Tim
Posted: Tue Oct 10, 2006 12:57 pm
by 23e Heure
Ian, I got 19.3 mpg on a run to Sicily and back in the summer. Enthusiastic driving in a 2.4E on MFI.
Treating it like a regulation rally, and accurately logging everything, it was a great test for the car for oil consumption, running temps etc. etc.
Some facts and figures here:
http://www.ddk-online.com/phpBB2/viewto ... rio+report