MPG gauge
#2
Racer
I have one on my 1984 S2 euro. (Litres/100km)
Although instrument clusters can be swapped, I believe mine fits the model year as the rev counter corresponds with the twin dizzy ignition.
Leo
Although instrument clusters can be swapped, I believe mine fits the model year as the rev counter corresponds with the twin dizzy ignition.
Leo
Last edited by Dutch 928 fan; 12-11-2012 at 06:38 PM. Reason: Spelling
The following users liked this post:
Rocca (12-29-2019)
#7
Racer
Yeah, not really. If you give the car a little throttle from a stop and while it's accelerating and the revs pick up, it'll go all the way to 25 l/100km. I think it's only good when you're cruising. Mine reads on average 10 l/100km, or about 23 mpg.
Trending Topics
#10
Rennlist Member
Come on, this is Porsche. When would they do it easy or cheap?
#11
The 944 has the same gauge. On the 944 at least it is not a vacuum gauge. It measures the injector duty cycle and the speed of the car to get MPG. At idle or 0mph it switches to the other map which is in light grey that reads GPH.
#12
Shameful Thread Killer
Rennlist Member
Rennlist Member
Interesting. I thought all of them were vacuum driven. Looks like many of them are sourced from other means.
#13
Chronic Tool Dropper
Lifetime Rennlist
Member
Lifetime Rennlist
Member
I was thinking that a ported vacuum gauge would do the trick, but neither that nor the plunger LVDT method directly take into account the speed of the car. With just the LVDT sensor, the car would get great mileage sitting still. Is there more to it than just the airflow door position sensor? Since the speedo is driven by pulse inputs. it wouldn't be a stretch to include wheel speed in the electronic gauge smarts.
My only exposure to this gauge has been on the '85Euro project car. I spent time under the hood, not so much in the driver's seat, so didn't pay attention to how it actually responded to load and speed changes.
My only exposure to this gauge has been on the '85Euro project car. I spent time under the hood, not so much in the driver's seat, so didn't pay attention to how it actually responded to load and speed changes.
#14
Inventor
Rennlist Member
Rennlist Member
The consumption 'computer' circuitry is analog, unlike CASIS, which uses a digital computer, the same type used in EZF and LH2.2 boxes.
(thread)
#15
Rennlist Member
In Action!
Last edited by depami; 12-12-2012 at 03:54 PM.