I have a 325ic recently converted to 5 speed. I kept the 4.10 rear end and you guessed it, it gets crappy MPG (per OBC). i drove from asheville to charlotte yesterday (2 hour drive somewhat moutainous with cruise on 80mph) with the a/c on and i got 22mpg. The motor is in good running health (AFAIK) all maintnance done etc.
My question is, for long road trips, is there a way to make the m20b25 guzzle less? Maybe something as far out as running an ETA ECU on it? This conversation is really to throw ideas out there to see what can be done to the m20b25 to run a bit cheaper. I know a/c off and 70mph would have me at 23-24 mpg.
I get roughly 15 in town and 22 on the HWY. That is rediculous. I know i come from two economic euroboxes (euro 318is and 324td) which get extremely good mileage and are still fun to drive, but a 2.5l motor getting 22mpg at cruising speed?
What is stopping the fuel efficiency, the rear end? the flow problems of the m20? maybe the fact that the car is a rag top? My heavy foot? (even though 80mpg should be a joke on this motor) what kind of mileage does a m50 get in similar conditions?
I'm sure many other e30 owners are asking themselves these questions.
Thanks for the input.
Julien
My question is, for long road trips, is there a way to make the m20b25 guzzle less? Maybe something as far out as running an ETA ECU on it? This conversation is really to throw ideas out there to see what can be done to the m20b25 to run a bit cheaper. I know a/c off and 70mph would have me at 23-24 mpg.
I get roughly 15 in town and 22 on the HWY. That is rediculous. I know i come from two economic euroboxes (euro 318is and 324td) which get extremely good mileage and are still fun to drive, but a 2.5l motor getting 22mpg at cruising speed?
What is stopping the fuel efficiency, the rear end? the flow problems of the m20? maybe the fact that the car is a rag top? My heavy foot? (even though 80mpg should be a joke on this motor) what kind of mileage does a m50 get in similar conditions?
I'm sure many other e30 owners are asking themselves these questions.
Thanks for the input.
Julien
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