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

Reply  Post New Thread
 
Submit Tools LinkBack Thread Tools
Old 12-16-2013, 08:17 PM   #1 (permalink)
EcoModding Lurker
 
Join Date: Nov 2011
Location: Virginia Beach
Posts: 9

The green car - '98 Honda Civic DX
90 day: 37.18 mpg (US)
Thanks: 0
Thanked 3 Times in 2 Posts
Tilting at windmills... (or, "1989 Suburban")

So, my wife has a 1989 6.2 liter diesel Suburban that she LOVES. There will be no convincing her to get a Matrix or something else that actually makes sense.

We've gotten 23-24 mpg with it, stock, specifically on three most-of-a-tank 65-70mph highway trips. Generally, though, it dwells in the 18 mpg range.

It needs a torque converter- the one in it has clearly worn itself into high-stall mode. Fortunately, I get to replace the torque converter with virtually no (additional) labor, if you ignore the time and cost of the new engine it needs.

So, since I'll be doing some portion of the work, I'm considering a few different things to do at the same time. I'm looking for feedback and thoughts, specifically for mileage and reliability. The Suburban is half ton, 2wd, 700R4 with overdrive, 3.08 rear gears, stock wheels/tires.

Considering (with varying levels of certainty):
Low stall (~1200) torque converter
Electric fans
Grill block/system, including...
...ram/cold air intake
Exhaust (?)
Synthetic fluids (dif and oil, at least- not sure what the 700R4 would like)

I've got some plans for aero as well. I can't convince her to lose the roof rack, but she hasn't noticed that I removed the crosspieces, and I've conveniently avoided putting the rear spoiler back on after 'accidentally' grabbing it and ripping it off. Although I'll need to replace the duct tape on the holes sometime soon (Kamm mounting points?). But I digress.

What else should I consider when the thing is all in pieces? Any other thoughts/suggestions?

Thank you!

Jon

  Reply With Quote
The Following 2 Users Say Thank You to jonbest For This Useful Post:
a8ksh4 (12-16-2013), Joggernot (12-17-2013)
Alt Today
Popular topics

Other popular topics in this forum...

   
Old 12-16-2013, 08:50 PM   #2 (permalink)
...beats walking...
 
Join Date: Jul 2009
Location: .
Posts: 6,191
Thanks: 179
Thanked 1,521 Times in 1,122 Posts
Quote:
Originally Posted by jonbest View Post
So, my wife has a 1989 6.2 liter diesel Suburban that she LOVES. ...but she hasn't noticed that...I've conveniently avoided putting the rear spoiler back on after 'accidentally' grabbing it and ripping it off. Although I'll need to replace the duct tape on the holes sometime soon (Kamm mounting points?). Jon
Think she'll believe you if you tell her that the Kamm assembly was the ONLY item available that *fits* those empty rear spoiler holes (wink,wink)?
  Reply With Quote
Old 12-17-2013, 05:56 PM   #3 (permalink)
EcoModding Lurker
 
Join Date: Nov 2011
Location: Virginia Beach
Posts: 9

The green car - '98 Honda Civic DX
90 day: 37.18 mpg (US)
Thanks: 0
Thanked 3 Times in 2 Posts
Quote:
Originally Posted by Old Tele man View Post
Think she'll believe you if you tell her that the Kamm assembly was the ONLY item available that *fits* those empty rear spoiler holes (wink,wink)?
Ha. I can fool her occasionally, but that's probably a bit much.

MAN is there huge variety in engine prices!

New wrinkle- there's a fairly cheap, low mileage truck with a fuel tank and rust problem I could get for the engine and 4 speed OD manual. Any thoughts on whether the additional (probably $700 plus some labor) expense would net much efficiency gain over a good condition 700R4?

Jon
  Reply With Quote
Old 12-17-2013, 06:47 PM   #4 (permalink)
(:
 
Frank Lee's Avatar
 
Join Date: Jan 2008
Location: up north
Posts: 12,594

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: 1,533
Thanked 3,377 Times in 2,126 Posts
Quote:
What else should I consider when the thing is all in pieces? Any other thoughts/suggestions?
Yes. Leave it in pieces and park a Matrix in the driveway. "Lose" the engine and some other critical parts while you're at it.
__________________


  Reply With Quote
Old 12-17-2013, 07:02 PM   #5 (permalink)
EcoModding Lurker
 
Join Date: Nov 2011
Location: Virginia Beach
Posts: 9

The green car - '98 Honda Civic DX
90 day: 37.18 mpg (US)
Thanks: 0
Thanked 3 Times in 2 Posts
Quote:
Originally Posted by Frank Lee View Post
Yes. Leave it in pieces and park a Matrix in the driveway. "Lose" the engine and some other critical parts while you're at it.
Har.

(Wife loves Suburban) + (Cost(25-30mpg vehicle that can tow a smallish boat)) = (years and years before fiscal gain realized) + (unhappy wife)

Monetarily, I'd lose out on any smaller, more efficient car that I would trust for many years before the fuel cost caught up. So, I'm left with 'what's the best I can get out of what we have?'
  Reply With Quote
Old 12-17-2013, 07:05 PM   #6 (permalink)
(:
 
Frank Lee's Avatar
 
Join Date: Jan 2008
Location: up north
Posts: 12,594

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: 1,533
Thanked 3,377 Times in 2,126 Posts
Since rationality isn't part of the equation, who says we guys always have to remain so?
__________________


  Reply With Quote
Old 12-17-2013, 09:16 PM   #7 (permalink)
EcoModding Lurker
 
Join Date: Nov 2011
Location: Virginia Beach
Posts: 9

The green car - '98 Honda Civic DX
90 day: 37.18 mpg (US)
Thanks: 0
Thanked 3 Times in 2 Posts
Quote:
Originally Posted by Frank Lee View Post
Since rationality isn't part of the equation, who says we guys always have to remain so?
With you in spirit.
  Reply With Quote
Old 12-17-2013, 11:05 PM   #8 (permalink)
Spaced out...
 
spacemanspif's Avatar
 
Join Date: Jul 2013
Location: Dirty Jersey
Posts: 748

The New Focus - '07 Ford Focus ZX5
90 day: 32.44 mpg (US)
Thanks: 142
Thanked 203 Times in 148 Posts
What engine do you plan to put back in? I'd think that its time to scrap the GM diesel and look for a 12 valve Cummins considering the huge aftermarket support for power AND economy mods on the engines.

If you don't off road it, maybe work in a drop kit when she's not looking?? lol
__________________
-Mike

2007 Ford Focus ZX5 - 91k - SGII, pending upper and lower grill bocks - auto trans
1987 Monte Carlo SS - 5.3/4L80E swap - 13.67 @ 106
2007 Ford Focus Estate - 230k - 33mpg - Retired 4/2018
1995 Saturn SL2 - 256K miles - 44mpg - Retired 9/2014

Cost to Operate Spreadsheet for "The New Focus"

  Reply With Quote
Old 12-17-2013, 11:23 PM   #9 (permalink)
Too busy for gas stations
 
Superfuelgero's Avatar
 
Join Date: May 2013
Location: The intersection of TN/MS/AL
Posts: 460

Turtle - '92 Honda Civic Vx
Team Honda
90 day: 67.09 mpg (US)

Rolla - '10 Toyota Corolla Le

Beast - '91 Chevy V2500

Bus - '01 VW Eurovan MV

Speed - '93 Harley bored and storked Harley w/ turbo/ nitrous
90 day: 53.09 mpg (US)

Cal - '68 Ford Mustang GT/CS
Thanks: 87
Thanked 176 Times in 114 Posts
Your plan sounds good. I get half that with my 91 (same body style).

You are missing intended use though (city, highway, tow, hauling, etc).

A manual will gain some due to a direct drive without a pump. What is your wife's opinion of this though?
I would add:
-Deeper air dam
-The '82 year heads w/ studs
-Remove any excess weight (3rd row, roll pan, etc)
-Ride height reduction (plus the rest of the 100+ ideas page)
-Smooth wheel covers
-91 mirrors or delete
-Set of tires off a Tahoe hybrid

The biggie would be the horrible underside of these rigs.
__________________
Shooting for 600 miles of range at 65-70 mph out of a vx.


Last edited by Superfuelgero; 12-17-2013 at 11:32 PM..
  Reply With Quote
Old 12-18-2013, 08:20 AM   #10 (permalink)
Master EcoModder
 
aardvarcus's Avatar
 
Join Date: Apr 2012
Location: Evensville, TN
Posts: 569

Deep Blue - '94 GMC Suburban K2500 SLE
90 day: 23.75 mpg (US)

Griffin (T4R) - '99 Toyota 4Runner SR5
90 day: 25.43 mpg (US)
Thanks: 194
Thanked 472 Times in 257 Posts
Quote:
Originally Posted by jonbest View Post
Ha. I can fool her occasionally, but that's probably a bit much.

MAN is there huge variety in engine prices!

New wrinkle- there's a fairly cheap, low mileage truck with a fuel tank and rust problem I could get for the engine and 4 speed OD manual. Any thoughts on whether the additional (probably $700 plus some labor) expense would net much efficiency gain over a good condition 700R4?

Jon
What four speed manual? The biggest concern I would have is if you change the lengths of your transmission, you will have to change the length of your driveshaft. I swapped a NV4500 5 speed overdrive into my 91 K2500 LD in place of my 700R4/4L60, because it was within 1/8Ē. That was a 4x4 though, you would have to check for a 2wd. Or perhaps you donít mind changing driveshaft lengths.

Anyway I went from 10.5-13 MPG with the 700R4 to 13-15.5 MPG with the NV4500, no real change in driving style. (Note 4x4, 5.7L TBI, RCLB 6 Lug K2500)

  Reply With Quote
Reply  Post New Thread


Thread Tools




Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2019, vBulletin Solutions Inc.
Content Relevant URLs by vBSEO 3.5.2
All content copyright EcoModder.com