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1966 Mercury F700 / 1986 IH S1954 Hybrid


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Update - It’s been a long time since I added to the board here...sorry!

Not too many updates.  I took the truck on a 6hr round trip.  It’s pretty comfortable on the highway.  It runs pretty nice at 2000rpm at 65mph now.  It seems to be a nice spot for the DT466 to run at

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I am not too sure - out of energy/out of funds for the time being!  
 

I was first thinking about a flat deck, but I have been wondering about maybe just a steel plate over the frame rails, the entire length of the truck.  I like the truck looking like a small highway tractor.   I plan to put a gooseneck/fifth wheel on in and pull a camper. 
 

image.jpeg.0228c4acca57fe101ef9472291e27d47.jpeg

 

This photo was on the forum a while back - seems like inspiration, but I am not sure if wood is my style.  The truck is stunning though.

5685A796-5B84-43E8-A119-5D57D3B5756B.jpeg.205d7bc6fca34c94295f049de5171432.jpeg

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On 7/27/2020 at 2:06 PM, Sask466 said:

I am not too sure - out of energy/out of funds for the time being!  
 

I was first thinking about a flat deck, but I have been wondering about maybe just a steel plate over the frame rails, the entire length of the truck.  I like the truck looking like a small highway tractor.   I plan to put a gooseneck/fifth wheel on in and pull a camper. 
 

image.jpeg.0228c4acca57fe101ef9472291e27d47.jpeg

 

This photo was on the forum a while back - seems like inspiration, but I am not sure if wood is my style.  The truck is stunning though.

5685A796-5B84-43E8-A119-5D57D3B5756B.jpeg.205d7bc6fca34c94295f049de5171432.jpeg

If you do the frame like that first pic that would be pretty dang sweet

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  • 1 month later...

Not too many updates.  I took the truck on a 6hr round trip.  It’s pretty comfortable on the highway.  It runs pretty nice at 2000rpm at 65mph now.  It seems to be a nice spot for the DT466 to run at - at least with just the truck and no trailer.  
 

I got 14mpg, mostly at 65 to 70mph and maybe one shot to 89mph...  I was pretty happy with that mileage.  The old 466 is pretty much as fuel efficient as a new truck that size.  
 

The electric fans are doing well.  It was 30degC (85F) for most of the trip and the engine never swayed from 180F.  No big hills here, and again wasn’t pulling anything.
 

The engine seemed to have a slight miss/unevenness between 1000 to 1500rpm.  It also seems very intolerant of lugging.  If you idle it down around a corner and then gently get back in the throttle it has a slight shuddering feeling.  I am talking no load and low speeds - not what you would typically call “lugging”.


 I think it is the injectors.  Before I did that trip, I dumped a bottle of Stanadyne supplement and a bottle of 2-stroke oil in the tank.   After driving about 2 hours, I was happily surprised to see most of that miss cleared up.  The low rpm lug/shudder has mostly cleared up too.  I’m not sure if it’s the fuel concoction I put in, or the running for 2hrs straight at load.  It’s probably mostly the running under load, but who knows.

When I get some time and more cash, I will do the injectors.  Any tips on injectors?  Should I buy rebuilds and do core returns? Should I have a local shop test/rebuild the ones I have?  Just curious if there are any quality issues with injectors that I should be aware of.

 

 

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  • 3 months later...

Latest update:

To help deal with ride and stability, I decided to put some ballast in the back.  I got a 1.25” x 28” x 72” chunk of plate mounted in between the frame rails.  I then covered over the top of the frame with 1/2 plate.  It should add up to around 1200lbs total.  

Even with the spring rear and no worth the ride was nearly tolerable, at least on highways.  I aired the rear tires down a fair bit, which was a huge help. 

This added weight should help with getting some more sprung weight in the back.  If I get sick of the ride I may do air ride at a later date, but I really want to avoid it if I can.  

 


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Next step is a 5th wheel hitch and a good sized camper.  Next year will be ironing out any bugs, and saving for a trailer!  
There are some older large 5th wheel campers that come along at pretty decent prices.  I am hoping I can snag a nice older unit down the road.

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1 hour ago, Sask466 said:

Next step is a 5th wheel hitch and a good sized camper.  Next year will be ironing out any bugs, and saving for a trailer!  
There are some older large 5th wheel campers that come along at pretty decent prices.  I am hoping I can snag a nice older unit down the road.

I have one here.35' Coachman. Can't give it away.

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  • 4 months later...

I have had a few chances to take the truck out this spring and I have some updates.

The weight I added to the back has really helped the ride.  It’s still stiff, but it doesn’t have any of that harsh rebound I was getting with no weight back there.  You don’t have to worry about the rear of the truck jumping around when you hit railroad tracks and stuff like that.

I checked my valve lash - everything seems in check so that’s good news.  The roughness the engine had around 1500rpm seems to be subsiding, so I am thinking it must be just old injectors that could probably use some attention down the road.

I opened the pump up a fair bit. It feels like it has about 50% more power, at least by the “seat of my pants” dyno.  It is now making around 25psi of boost vs the 15 it was doing prior.  I managed to do a bit of a pull with it up a hill, and it would get into 1250F territory when I stayed into it for 10 or 15 seconds.  


I don’t have an intercooler, and I don’t want to deal with the hassle of making one  fit.  So I think that’s pretty much as far as I will take it.  It’s only me driving it, I won’t ever flog on it too hard, and that’s why I installed a pyro too.

I think someone on this board mentioned the old rule of thumb for stock-type 466’s was 10hp per psig, and if I had to guess, I would say that’s about where I am at (250hp). 
 

That power sure makes driving around town and the highway nicer, it feels more like a pickup truck now.  

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