4500 RPM tach [states for Diesel, but is for gas] - used

[1986F150Six]

https://www.ebay.com/itm/80-86-FORD-DIESEL-TRUCK-TACHOMETER-BRONCO-GAUGE-INSTRUMENT-CLUSTER/184012151230?hash=item2ad7fa99be:g:JQ8AAOSwM2ddtwFE

This is the one for Diesel: https://www.ebay.com/itm/80-86-FORD-DIESEL-TRUCK-TACHOMETER-BRONCO-GAUGE-INSTRUMENT-CLUSTER/184008633948?hash=item2ad7c4ee5c:g:~~cAAOSwfOBdswrG

[Gary Lewis]

Well spotted.  Besides, a diesel Bronco?  

[Rembrant]

Wow that diesel one sold for $110 bucks. Nice.

I still have a 4500 RPM gas tach I pulled out of a 1985 F800. Curious what they sell for...not nearly as much as the more obscure diesel tachs I suppose. I may install it in my truck sometime just to get a better reading on the RPM's I use...which is usually only the lower half of the 6000 RPM tach I have now.

[1986F150Six]

Cory, I have one in my truck. The six cylinder does not rev high and barely moved the original 6K tachometer.

[Ford F834]

Rembrant wrote

Wow that diesel one sold for $110 bucks. Nice.

I still have a 4500 RPM gas tach I pulled out of a 1985 F800. Curious what they sell for...not nearly as much as the more obscure diesel tachs I suppose. I may install it in my truck sometime just to get a better reading on the RPM's I use...which is usually only the lower half of the 6000 RPM tach I have now.

The 4,000 and 4,500 rpm GAS tachometers are actually far less common than the diesel ones. They do occasionally sell for a high price, but the market is smaller. Few people realize the value for using them on a 6 cyl with the “8” lug isolated. I love the 4,500 in mine and I paid quite bit for it. I would still prefer the 4,000 tach but the junkyard one I found for David and the one I bought off a guy on Facebook started sticking. I think I can fix them with the movement from a non integral circuit 6,000 rpm unit, but they are packed away at the moment.

[1986F150Six]

Look at post #3 of this old thread. At that time, my truck had the 4K tach which Jonathan found and provided. When it began sticking and reading high, it was replaced with a NOS 4500 RPM tach.

https://www.ford-trucks.com/forums/1400393-2015-fall-gtg-oklahoma-chapter.html

[Ford F834]

Wow. Hard to believe that’s been four years ago now... 😳

[Rembrant]

1986F150Six wrote

When it began sticking and reading high, it was replaced with a NOS 4500 RPM tach.

You guys have me thinking about trying my 4500 RPM tach for a while. It came out of a 1985 F800 Fire Truck that had only about 28,000 original miles on it, so it didn't see much action over the years.

I believe I asked this before, but the 4500 RPM tach is a direct swap into my existing factory cluster right? It would be going from a V8 to a V8. I believe that F800 had a 429 engine in it...does that sound correct for an '85?

I'd like to try it for a while and see if I like it better than the 6000 RPM tach. I don't think I've had the engine above 3500 RPM since I put it in there, and I spend the majority of my time between 1500-2500 RPM.

[1986F150Six]

Go for it, Cory! It will be a direct swap and you will be amazed at how quickly the needle seems to jump since it will sweep more for the same engine speed.