Quote:
Originally Posted by JSH
If you are shooting for 20ish mpg highway I would just swap in a Chevy 4.3L V6 and call it a day. Your 1993 G20 with the 4.3L was rated at 20 mpg highway from the factory. 4.3L V6's are a dime a dozen in junkyards.
I've done 20-22 mpg with my 2004 Chevy Astro (before the lift)
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I have that engine in my 1998 S10, something like 245 lbs of torque, fun to drive.
Intake manifold gaskets go at 75K, I'm told the aftermarket ones are better/thicker than stock and are superior. I used some goop and clogged up my heater core, live and learn - did fix the problem, more like an exchange of problems.
1. Take weight out of the van if possible.
2. Improve aerodynamics where possible.
3. Many of the aerodynamic improvements add a tiny amount of weight but are worth it.
The large chin spoiler I once added to a 1976 shortbox Ford van did not improve MPG, but it did tame cross winds and made driving more enjoyable.
If I ever got a van again I would make it look like a big rig with the rear baffles forming a box cavity.
Like these:
https://gajitz.com/happy-tails-simpl...ficient-wings/
https://ecomodder.com/forum/showthre...g-36038-6.html
Or this:
https://ecomodder.com/forum/showthre...g-36038-6.html
