Discussion Starter · #1 ·
So I was looking for some engine info the other day and ran across this Pentstar discussion forum on line. Its not a big site or anything but seems friendly enough. Anyway I invited a guy who was responding to some propane posts I put in to visit us here. Be surprised if he isnt here under a different name because he apparently has a 76 powerwagon short box 4x4. But heres the thing. He says he has a stroked 383 (431 cid) that is getting 18 to 22 mpg. Thats with 3:55 gears, 10.5 compression on low octane pump gas, carter 2v carb, 906 ported milled heads, forged flat tops, doesnt rev over 5000, and full time 4x4 tcase. Now thats something. Cant see it myself, between detonation on 10.5 compression, or 18 to 22 mpg. But I'm no expert. Anybody think this is doable?