Quote:
Originally Posted by Stan
I read a technical paper recently where the researchers improved the FE of a late-model TDi just 2% by removing about 250 lbs from the car. In contrast, reprogramming the chip yielded 4%.
OTOH, one CAN get 70 mpg from an old Mk1 dwiesel radjit... 
Start by reading this Ecomodder thread and the linked article about the "Rabbit Sipster". Forget transplanting a TDi into it...just apply the aero mods he does and I bet 70 mpg is not out of the question. Heck, I used to get 50+ mpg from my first-gen Rabbit and Pickup both just by using a light foot. |
Interesting about the weight vs chip tweaks.
I also used to have an 81 diesel Rabbit, and saw high 40s constantly. Didn't know squat about eco-modding.
Take a look at three-wheeler's Honda or the aerocivic. A good boattail should help you out.
I also suggest you replace the soft rubber front motor mount with the harder rubber from VW Sport or better yet polyurethane. I ran a poly mount for some time; doesn't really change the vibes and it keeps the engine from rocking.