Any tips on a fan belt tach drive?

Discuss all things Model T related.
Forum rules
If you need help logging in, or have question about how something works, use the Support forum located here Support Forum
Complete set of Forum Rules Forum Rules
Post Reply Previous topicNext topic

Topic author
Reno Speedster
Posts: 572
Joined: Tue May 26, 2020 6:23 pm
First Name: Morgan
Last Name: Blanchard
* REQUIRED* Type and Year of Model Ts owned: 1926 Model T Speedster Project, 1922 Runabout Pickup
Location: Anchorage, Alaska

Any tips on a fan belt tach drive?

Post by Reno Speedster » Tue Jul 15, 2025 1:15 pm

I have a great old tachometer that reads in hundreds of RPMs that I am using on my speedster. A while back I saw a tachometer drive that ran off the fan belt in a picture of an English car, but I can’t find the picture and have never seen another. Have any of you made, used, or seen a belt driven tachometer drive on a T or other car? If so, I am interested in any information on what works and how to make one.
Top
User avatar

Steve Jelf
Posts: 7233
Joined: Fri Jan 04, 2019 9:37 pm
First Name: Steve
Last Name: Jelf
* REQUIRED* Type and Year of Model Ts owned: 1923 touring and a few projects
Location: Parkerfield, Kansas
Board Member Since: 2007
Contact:
Contact Steve Jelf

Re: Any tips on a fan belt tach drive?

Post by Steve Jelf » Tue Jul 15, 2025 1:58 pm

I don't know about belt drive, but tachometers are a common item for sale on the net at a wide range of prices.
The inevitable often happens.
1915 Runabout
1923 Touring
Top
User avatar

DanTreace
Posts: 3812
Joined: Sun Jan 06, 2019 10:56 am
First Name: Dan
Last Name: Treace
* REQUIRED* Type and Year of Model Ts owned: ‘12 open express,'23 cutoff, '27 touring
Location: North Central FL
Board Member Since: 2000
Contact:
Contact DanTreace

Re: Any tips on a fan belt tach drive?

Post by DanTreace » Tue Jul 15, 2025 2:40 pm

Older post on tach installs

Scroll down and photo of fan pulley drive using an o-ring as drive belt.


https://www.mtfca.com/discus/messages/1 ... 1296400655
The best way is always the simplest. The attics of the world are cluttered up with complicated failures. Henry Ford
Don’t find fault, find a remedy; anybody can complain. Henry Ford
Top
User avatar

Craig Leach
Posts: 1905
Joined: Tue Jan 08, 2019 12:22 am
First Name: craig
Last Name: leach
* REQUIRED* Type and Year of Model Ts owned: 1919 Firetruck/1922 Speedster
Location: Laveen Az

Re: Any tips on a fan belt tach drive?

Post by Craig Leach » Tue Jul 15, 2025 2:59 pm

Hi Morgan,
A while back someone was looking for info on adjusting the speed of a tach drive that came off the back of the generator. But no on the fan
which will maybe need the same ratio change made.
Craig.
Top

Topic author
Reno Speedster
Posts: 572
Joined: Tue May 26, 2020 6:23 pm
First Name: Morgan
Last Name: Blanchard
* REQUIRED* Type and Year of Model Ts owned: 1926 Model T Speedster Project, 1922 Runabout Pickup
Location: Anchorage, Alaska

Re: Any tips on a fan belt tach drive?

Post by Reno Speedster » Tue Jul 15, 2025 3:16 pm

I like the one that runs off the fan hub. That would be a simple way to do it and using a rubber drive rather than the belt would be simple. I would need to do some calculations to get the ratio right. The mounting is pretty easy as well. The only difference is I am using the 1926 water outlet/fan hub.
Top
User avatar

Henry K. Lee
Posts: 5474
Joined: Sun Jan 06, 2019 11:09 am
First Name: Henry
Last Name: Lee
* REQUIRED* Type and Year of Model Ts owned: Many
Location: South Pittsburg, TN
MTFCA Life Member: YES

Re: Any tips on a fan belt tach drive?

Post by Henry K. Lee » Tue Jul 15, 2025 3:21 pm

The ones I have seen Morgan used a rubber wheel as you are stating with light spring pressure from an arm. Turned out it was pretty accurate.
Top
Post Reply Previous topicNext topic

Return to “General Discussion Forum”