New member Indy
 

I have a 1982 Dodge D150 with a /6 and 904with lockup.Shortbed truck got 11mpg when purchased.Replaced stock ignition [leanburn]with home made HEI conversion.Got 20mpg on last tank.Just getting started on mods.

Welcome to the site.

Are you saying that replacing your ignition alone almost doubled your mileage? Excuse me, but that sounds a bit far fetched. Care to explain?

Welcome to Ecomodder! Nice to see another person from Indy.

The original ignition was the dodge "lean burn" computor.I replaced the distibutor with an electronic distributor with mechanical and vacuum advance.I used a HEI module from a 1980 gm distibutor to control the coil.The original was not advancing the spark,all I had was initial advance.GM HEI conversion (A 'How To') - Dodge Talk Community Forum Slant Six Forum, :: View topic - HEI Electronic Ignition Retrofit How-To The links above will explain further.

Ah, no spark advance. Yeah that would probably do it. Thanks for explaining. :)