Go Back   EcoModder Forum > EcoModding > EcoModding Central
Register Now
 Register Now
 


Reply  Post New Thread
 
Submit Tools LinkBack Thread Tools
Old 05-18-2011, 03:43 AM   #1 (permalink)
Too many cars
 
Gasoline Fumes's Avatar
 
Join Date: Oct 2009
Location: New York State
Posts: 1,369

CRXFi - '88 Honda CRX XFi

Insight 256 - '00 Honda Insight
Team Honda
Gen-1 Insights

Insight 5342 - '00 Honda Insight
Team Honda
Gen-1 Insights
90 day: 65.78 mpg (US)
Thanks: 872
Thanked 639 Times in 377 Posts
EcoMod This!

I picked up this beast of a pickup over the winter.


1980 Chevy K20, aka The Mule. 3/4 ton 4WD with a gas 5.7L V8 and 4-speed manual. It's really a 3-speed with a "crawler" gear. Originally from Arizona, but starting to rust after a few years in NY.

Not driving it saves the most fuel. It gets single digit MPG towing at 45-50 MPH! The first planned mod is more displacement. A 6.2L diesel V8. That alone should get me an additional 5+ MPG.

Axle ratios are 3.73. And there's no overdrive. I wanted taller gears until I towed 4000 lbs uphill. I don't think the weaker diesel could handle taller gears. An overdrive transmission would be nice, but they're hard to find at a decent price. So gearing will likely stay as it is. I'll just drive slow.

It will be converted to run on WVO and I'm thinking about an aerocap. Any other ideas? Is synthetic gear oil in the tranny, transfer case and rear end worth it? I'll be plowing snow with it, so I can't lower it or do much with the horrible underbody aerodynamics. Maybe an airdam? Since I'm planning to use the much smaller gas radiator, a grill block is probably a bad idea.

__________________

  Reply With Quote
Alt Today
Popular topics

Other popular topics in this forum...

   
Old 05-18-2011, 03:54 AM   #2 (permalink)
(:
 
Frank Lee's Avatar
 
Join Date: Jan 2008
Location: up north
Posts: 12,747

Blue - '93 Ford Tempo
Last 3: 27.29 mpg (US)

F150 - '94 Ford F150 XLT 4x4
90 day: 18.5 mpg (US)

Sport Coupe - '92 Ford Tempo GL
Last 3: 69.62 mpg (US)

ShWing! - '82 honda gold wing Interstate
90 day: 33.65 mpg (US)

Moon Unit - '98 Mercury Sable LX Wagon
90 day: 21.24 mpg (US)
Thanks: 1,579
Thanked 3,518 Times in 2,202 Posts
I don't think an airdam will do much behind a plow.
__________________


  Reply With Quote
Old 05-18-2011, 04:12 AM   #3 (permalink)
Too many cars
 
Gasoline Fumes's Avatar
 
Join Date: Oct 2009
Location: New York State
Posts: 1,369

CRXFi - '88 Honda CRX XFi

Insight 256 - '00 Honda Insight
Team Honda
Gen-1 Insights

Insight 5342 - '00 Honda Insight
Team Honda
Gen-1 Insights
90 day: 65.78 mpg (US)
Thanks: 872
Thanked 639 Times in 377 Posts
But the plow isn't there all year.
__________________

  Reply With Quote
Old 05-18-2011, 05:28 AM   #4 (permalink)
Diesel Addict/No Cure
 
cleanspeed1's Avatar
 
Join Date: Apr 2011
Location: chicago, il
Posts: 787

StolenHoopty - '90 Honda Accord EX

HvyDrnkr - '93 Cadillac Seville
Thanks: 130
Thanked 74 Times in 49 Posts
What are you going to do with the truck most of the time?
__________________
Volvo WIA42 VED-12 / 335 hp / 1300 ft/lbs / 9 mpg

Big n' Boxy, Never met a Hill it Didn't Like
  Reply With Quote
Old 05-18-2011, 06:14 AM   #5 (permalink)
Too many cars
 
Gasoline Fumes's Avatar
 
Join Date: Oct 2009
Location: New York State
Posts: 1,369

CRXFi - '88 Honda CRX XFi

Insight 256 - '00 Honda Insight
Team Honda
Gen-1 Insights

Insight 5342 - '00 Honda Insight
Team Honda
Gen-1 Insights
90 day: 65.78 mpg (US)
Thanks: 872
Thanked 639 Times in 377 Posts
I'll let it sit in the driveway most of the time. It's really just for moving things that don't fit in a hatchback. Could be scrap metal or a whole car on a flatbed trailer. And plowing a few driveways in the winter. MPG isn't really even that important considering how much it will be driven. I just like making vehicles more efficient. I already have the diesel engine, so that's a no-brainer. And then I can sell the gas engine for around $500.
__________________

  Reply With Quote
Old 05-18-2011, 06:46 AM   #6 (permalink)
Eco-ventor
 
jakobnev's Avatar
 
Join Date: Oct 2010
Location: sweden
Posts: 1,439

Princess - '92 Mazda MX-3 GS
House of Tudor
Team Mazda
90 day: 53.54 mpg (US)

Shirubāarō (*ω`*) - '05 Toyota Prius Executive
Team Toyota
90 day: 44.95 mpg (US)
Thanks: 62
Thanked 558 Times in 355 Posts
Send a message via MSN to jakobnev
Will you be driving short or long trips with it?
__________________




2016: 128.75L for 1875.00km => 6.87L/100km (34.3MPG US)
2017: 209.14L for 4244.00km => 4.93L/100km (47.7MPG US)
  Reply With Quote
Old 05-18-2011, 08:19 AM   #7 (permalink)
Too many cars
 
Gasoline Fumes's Avatar
 
Join Date: Oct 2009
Location: New York State
Posts: 1,369

CRXFi - '88 Honda CRX XFi

Insight 256 - '00 Honda Insight
Team Honda
Gen-1 Insights

Insight 5342 - '00 Honda Insight
Team Honda
Gen-1 Insights
90 day: 65.78 mpg (US)
Thanks: 872
Thanked 639 Times in 377 Posts
Mostly shorter trips. 0-30 miles.
__________________

  Reply With Quote
Old 05-18-2011, 09:32 AM   #8 (permalink)
EcoModding Lurker
 
Join Date: Apr 2011
Location: Boulder, CO
Posts: 10
Thanks: 0
Thanked 1 Time in 1 Post
Quote:
Originally Posted by Gasoline Fumes View Post
. . . I already have the diesel engine, so that's a no-brainer. And then I can sell the gas engine for around $500. . .
I did this same conversion several years ago. It can still cost a lot of money, even if you already have the engine. You'll need a different flywheel, starter, exhaust, batteries, glow plug relay, etc., etc. And depending on the condition of the engine, you may need to replace/rebuild things like the injectors, injection pump ($$$), etc. IIRC, the diesel engine has oil cooler lines, so you may need a new radiator too. I remember it nickle and dimed me to the tune of several thousand dollars by the time it was all finished. Perhaps you have more parts than I did to start with, but don't underestimate the cost of all the components to get the vehicle moving.
Then you'll have to figure out how to register it, which may or may not be an issue where you live.
And finally, the old GM diesel is just not a great engine. I saw a very modest mpg increase, and the power for towing or plowing just isn't there. You probably won't ever come close to recouping the cost of the conversion in fuel savings, particularly since you don't plan to drive it a lot.
For a lot less, you could probably tune up and modify the 350 to make more power and be more efficient (headers, free-flowing exhaust, carb rebuild, engine freshen up, towing/mileage cam, etc). It would crush the 6.2 for power and torque.
Then again, the 350 may be worn out and need re-boring, full valve and guide job, etc, but if it's really worth $500, then it should still have good compression and be within wear tolerances.
Anyhow, I'm in the process of freshening up the 350 in a '77 3/4 ton and doing the above-mentioned mods, so when I saw this post, I figured I'd chime in. Hope it helps.
  Reply With Quote
The Following User Says Thank You to northboundtrain For This Useful Post:
Gasoline Fumes (05-18-2011)
Old 05-18-2011, 10:10 AM   #9 (permalink)
Diesel Addict/No Cure
 
cleanspeed1's Avatar
 
Join Date: Apr 2011
Location: chicago, il
Posts: 787

StolenHoopty - '90 Honda Accord EX

HvyDrnkr - '93 Cadillac Seville
Thanks: 130
Thanked 74 Times in 49 Posts
Quote:
Originally Posted by northboundtrain View Post
I did this same conversion several years ago. It can still cost a lot of money, even if you already have the engine. You'll need a different flywheel, starter, exhaust, batteries, glow plug relay, etc., etc. And depending on the condition of the engine, you may need to replace/rebuild things like the injectors, injection pump ($$$), etc. IIRC, the diesel engine has oil cooler lines, so you may need a new radiator too. I remember it nickle and dimed me to the tune of several thousand dollars by the time it was all finished. Perhaps you have more parts than I did to start with, but don't underestimate the cost of all the components to get the vehicle moving.
Then you'll have to figure out how to register it, which may or may not be an issue where you live.
And finally, the old GM diesel is just not a great engine. I saw a very modest mpg increase, and the power for towing or plowing just isn't there. You probably won't ever come close to recouping the cost of the conversion in fuel savings, particularly since you don't plan to drive it a lot.
For a lot less, you could probably tune up and modify the 350 to make more power and be more efficient (headers, free-flowing exhaust, carb rebuild, engine freshen up, towing/mileage cam, etc). It would crush the 6.2 for power and torque.
Then again, the 350 may be worn out and need re-boring, full valve and guide job, etc, but if it's really worth $500, then it should still have good compression and be within wear tolerances.
Anyhow, I'm in the process of freshening up the 350 in a '77 3/4 ton and doing the above-mentioned mods, so when I saw this post, I figured I'd chime in. Hope it helps.
+1 with a tool box.

If anything, if you just want something to do, stick the 6.2 in a car to replace a 5.7 Olds diesel.
__________________
Volvo WIA42 VED-12 / 335 hp / 1300 ft/lbs / 9 mpg

Big n' Boxy, Never met a Hill it Didn't Like

Last edited by cleanspeed1; 05-18-2011 at 10:21 AM..
  Reply With Quote
Old 05-18-2011, 10:32 AM   #10 (permalink)
Eco-ventor
 
jakobnev's Avatar
 
Join Date: Oct 2010
Location: sweden
Posts: 1,439

Princess - '92 Mazda MX-3 GS
House of Tudor
Team Mazda
90 day: 53.54 mpg (US)

Shirubāarō (*ω`*) - '05 Toyota Prius Executive
Team Toyota
90 day: 44.95 mpg (US)
Thanks: 62
Thanked 558 Times in 355 Posts
Send a message via MSN to jakobnev
Maybe you can find some eco-friendly way of preheating the drive line.

__________________




2016: 128.75L for 1875.00km => 6.87L/100km (34.3MPG US)
2017: 209.14L for 4244.00km => 4.93L/100km (47.7MPG US)
  Reply With Quote
The Following User Says Thank You to jakobnev For This Useful Post:
Gasoline Fumes (05-18-2011)
Reply  Post New Thread


Thread Tools




Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2021, vBulletin Solutions Inc.
Content Relevant URLs by vBSEO 3.5.2
All content copyright EcoModder.com