Notices
1980 - 1986 Bullnose F100, F150 & Larger F-Series Trucks Discuss the Early Eighties Bullnose Ford Truck

Cummins swap/frame question

Thread Tools
 
Search this Thread
 
Old Jul 1, 2017 | 05:40 PM
  #466  
Rogue_Wulff's Avatar
Rogue_Wulff
Thread Starter
|
Post Fiend
Joined: Dec 2007
Posts: 8,521
Likes: 16
From: Lost
yes, driveshaft will need to be shortened. Already have the slip-yoke for the trans, as that is keeping in the $90 worth of trans oil.....

Throttle cable will be easy. EFI 4.9L cable should work, sine the original is about 1/4" too short.....
 
Reply
Old Jul 1, 2017 | 05:51 PM
  #467  
Rogue_Wulff's Avatar
Rogue_Wulff
Thread Starter
|
Post Fiend
Joined: Dec 2007
Posts: 8,521
Likes: 16
From: Lost
I was rather bummed a couple weeks ago, me and my son spent the whole day (fathers day) trying to get it running, and just could not get it to fire up.
Pulled the injectors and ran a compression test last weekend, all looked good. Took the injectors over to have tested, and two were stuck open. Put the injectors in today, and it started so quick and easy, like it did back when I had it running on the shop floor.
 
Reply
Old Jul 1, 2017 | 06:00 PM
  #468  
Gary Lewis's Avatar
Gary Lewis
FTE Legend
15 Year Member
Photogenic
Photoriffic
Shutterbug
Joined: Jul 2010
Posts: 32,875
Likes: 48
From: Northeast, OK
That would be a bummer. Glad you figured it out. Sounds like you are in the home stretch.
 
Reply
Old Jul 8, 2017 | 05:13 PM
  #469  
Rogue_Wulff's Avatar
Rogue_Wulff
Thread Starter
|
Post Fiend
Joined: Dec 2007
Posts: 8,521
Likes: 16
From: Lost
It went for a short maiden voyage today, to the station for $15 of diesel..........
 
Reply
Old Jul 8, 2017 | 05:35 PM
  #470  
Gary Lewis's Avatar
Gary Lewis
FTE Legend
15 Year Member
Photogenic
Photoriffic
Shutterbug
Joined: Jul 2010
Posts: 32,875
Likes: 48
From: Northeast, OK
Congrat's!!!
 
Reply
Old Jul 9, 2017 | 06:49 PM
  #471  
Rogue_Wulff's Avatar
Rogue_Wulff
Thread Starter
|
Post Fiend
Joined: Dec 2007
Posts: 8,521
Likes: 16
From: Lost
After adding a bit more exhaust pipe, I took it for another short drive. This time I got it out on the highway for a bit, about 2 miles, before turning around and coming back to the shop. No idea how far off the speedometer is, but it at least shows something.
I was a bit nervous about how well it could cope with the rather tall rear gear ratio (2.75) in OD, but it pulled rather well. Surprising, when you consider the final drive ratio is 2.0075 : 1 (2.75 X .73 OD). This means the engine is only turning twice the RPM as the tires.....
Have to remove the top of the injection pump to fix a leak. Not only does it get fuel everywhere, but it allows air into the pump when shut off, making it hard to start if I don't pump the manual primer lever. At least it has one........

Brakes are rather soft, probably still have air in the master cyl, but it stops without any drama. Haven't even knocked all the rust off the rotors yet.

Engine runs rather cool, once the t-stat opens. At some point, I will be adding a cooling fan of some sort. Will also be draining the water out, and putting in real coolant. The fan will become mandatory when I start getting the A/C plumbed.

Overall, I'm pleased with how it runs, but there's a few little things left to sort out.
 
Reply
Old Jul 9, 2017 | 09:37 PM
  #472  
Gary Lewis's Avatar
Gary Lewis
FTE Legend
15 Year Member
Photogenic
Photoriffic
Shutterbug
Joined: Jul 2010
Posts: 32,875
Likes: 48
From: Northeast, OK
Those gears are TALL! But ifnitll pull them you have a winner.
 
Reply
Old Jul 9, 2017 | 11:08 PM
  #473  
gravelstne's Avatar
gravelstne
New User
Joined: Oct 2005
Posts: 7
Likes: 0
From: Atascadero, CA, USA
I know that there are cummins mounts from ford dump trucks that make it a simple install. The frames are about 1/16" thicker per model... ie F150 is 1/16" thicker than F100 and F350 is 1/16" thicker than F250...and so on
 
Reply
FTE Stories

Ford Trucks for Ford Truck Enthusiasts

story-0

10 Things Every Truck Owner NEEDS (2026 Edition)

 Michael S. Palmer
story-1

Rezvani's Latest Post-Apocalytic Monster Is a Ford F-150 Raptor Underneath

 Verdad Gallardo
story-2

Top 10 Most Expensive Ford Trucks Ever Sold on Bring a Trailer

 Joe Kucinski
story-3

2027 Ford Super Duty Buyer's Guide (Every Model, Engine, & Package)

 Brett Foote
story-4

Top 10 Ford Truck Tragedies

 Joe Kucinski
story-5

AEV FXL Super Duty - the Super Duty Raptor Ford Doesn't Make

 Brett Foote
story-6

Lobo Vs Lobo: Proof the F-150 Lobo Should Be Even Lower!

 Michael S. Palmer
story-7

Ford's 2001 Explorer Sportsman Concept Looks For a New Home

 Verdad Gallardo
story-8

10 Best Ford Truck Engines We Miss the Most!

 Joe Kucinski
story-9

2026 Shelby F-150 Off-Road: Better Than a Raptor R?

 Brett Foote
Old Jul 10, 2017 | 10:15 AM
  #474  
1986F150six's Avatar
1986F150six
Lead Driver
Joined: Jul 2009
Posts: 6,477
Likes: 19
From: Sheffield, AL
Originally Posted by Gary Lewis
Those gears are TALL! But ifnitll pull them you have a winner.

Hmmm... 25+ mpg?
 
Reply
Old Jul 10, 2017 | 10:23 AM
  #475  
Gary Lewis's Avatar
Gary Lewis
FTE Legend
15 Year Member
Photogenic
Photoriffic
Shutterbug
Joined: Jul 2010
Posts: 32,875
Likes: 48
From: Northeast, OK
Better than that, I'll bet.
 
Reply
Old Jul 10, 2017 | 10:26 AM
  #476  
1986F150six's Avatar
1986F150six
Lead Driver
Joined: Jul 2009
Posts: 6,477
Likes: 19
From: Sheffield, AL
My first thought was 30...
 
Reply
Old Jul 10, 2017 | 10:29 AM
  #477  
Gary Lewis's Avatar
Gary Lewis
FTE Legend
15 Year Member
Photogenic
Photoriffic
Shutterbug
Joined: Jul 2010
Posts: 32,875
Likes: 48
From: Northeast, OK
Maybe he will know by September? Gotta see this thing!
 
Reply
Old Jul 10, 2017 | 10:33 AM
  #478  
1986F150six's Avatar
1986F150six
Lead Driver
Joined: Jul 2009
Posts: 6,477
Likes: 19
From: Sheffield, AL
Originally Posted by Gary Lewis
Maybe he will know by September? Gotta see this thing!

Remember powder coating the valve covers? You also removed [milled] the DODGE from an intake piece.
 
Reply
Old Jul 10, 2017 | 10:38 AM
  #479  
Gary Lewis's Avatar
Gary Lewis
FTE Legend
15 Year Member
Photogenic
Photoriffic
Shutterbug
Joined: Jul 2010
Posts: 32,875
Likes: 48
From: Northeast, OK
The "cuss words". Yes, I remember.
 
Reply
Old Jul 10, 2017 | 12:58 PM
  #480  
Rogue_Wulff's Avatar
Rogue_Wulff
Thread Starter
|
Post Fiend
Joined: Dec 2007
Posts: 8,521
Likes: 16
From: Lost
Originally Posted by gravelstne
I know that there are cummins mounts from ford dump trucks that make it a simple install. The frames are about 1/16" thicker per model... ie F150 is 1/16" thicker than F100 and F350 is 1/16" thicker than F250...and so on
I made some custom engine brackets, and set it down on stock mounts, into the factory I-6 frame stands.


As for the MPG guesses, I'm hoping to top 30. But, anything over 15 will be an improvement on what it did with the gas 6.......
 
Reply



All times are GMT -5. The time now is 09:57 AM.

story-0
10 Things Every Truck Owner NEEDS (2026 Edition)

Slideshow: the best gifts for dads & grads

By Michael S. Palmer | 2026-06-02 21:45:57


VIEW MORE
story-1
Rezvani's Latest Post-Apocalytic Monster Is a Ford F-150 Raptor Underneath

Slideshow: Called the Fortress, the 850-horsepower pickup combines Raptor underpinnings with military-inspired features, survival equipment, and a starting price of $285,000.

By Verdad Gallardo | 2026-05-30 18:33:59


VIEW MORE
story-2
Top 10 Most Expensive Ford Trucks Ever Sold on Bring a Trailer

Slideshow: 10 most expensive Ford trucks ever sold on Bring a Trailer.

By Joe Kucinski | 2026-05-27 16:24:34


VIEW MORE
story-3
2027 Ford Super Duty Buyer's Guide (Every Model, Engine, & Package)

Here's everything that has changed for the latest model year.

By Brett Foote | 2026-05-27 16:17:28


VIEW MORE
story-4
Top 10 Ford Truck Tragedies

Slideshow: Top 10 Ford truck tragedies.

By Joe Kucinski | 2026-05-18 19:34:33


VIEW MORE
story-5
AEV FXL Super Duty - the Super Duty Raptor Ford Doesn't Make

And it might be even better than that.

By Brett Foote | 2026-05-18 19:26:42


VIEW MORE
story-6
Lobo Vs Lobo: Proof the F-150 Lobo Should Be Even Lower!

Slideshow: Does lowering an F-150 Lobo RUIN the ride quality?

By Michael S. Palmer | 2026-05-18 19:20:37


VIEW MORE
story-7
Ford's 2001 Explorer Sportsman Concept Looks For a New Home

Slideshow: Ford's bizarre fishing-themed Explorer concept has resurfaced after spending decades largely forgotten.

By Verdad Gallardo | 2026-05-12 18:07:46


VIEW MORE
story-8
10 Best Ford Truck Engines We Miss the Most!

Slideshow: The 10 best Ford truck engines we miss the most.

By Joe Kucinski | 2026-05-12 13:09:47


VIEW MORE
story-9
2026 Shelby F-150 Off-Road: Better Than a Raptor R?

Slideshow: first look at the 810 hp 2026 Shelby F-150 Off-Road!

By Brett Foote | 2026-05-12 12:50:07


VIEW MORE