Author Topic: 17080213 carb being used in tractor application  (Read 1521 times)

Offline sploke

  • Garage guy
  • **
  • Posts: 7
17080213 carb being used in tractor application
« on: May 04, 2020, 12:37:37 PM »
Hello!  I am in the midst of converting an old Allis-Chalmers farm tractor from the stock engine, which had a cracked block, to a small block chevy 350.  The engine came out of a 1984 pickup.  The carb number is 17080213.  I've ordered a rebuild kit from Cliff, along with one of his books.  I'm just wondering if there's anything specific I should be looking at when I tear into this thing.  It looks like a crazy octopus with the number of vacuum lines all over the place...I'm hoping there are some things I could do to minimize that.  My goals are sort of counter to how most folks might tune a carb...I need absolutely no top end, the engine will likely run at 1500-1800rpm most of the time, so I'd really like it to run smooth and efficient at low RPM and keep things as simple as possible.  I'm not opposed to keeping the automatic chokes, but I'm not sure what all else *has* to stay for the unit to function as designed.  Most of my experience is with either bare bones Edelbrock units, motorcycle CV carbs, or small engine units, so this is a new animal for me.  Here are a few pics.


Offline Cliff Ruggles

  • Administrator
  • Qjet Hero
  • *****
  • Posts: 5435
Re: 17080213 carb being used in tractor application
« Reply #1 on: May 05, 2020, 04:19:51 AM »
The carb will work fine for what you are doing on a pretty much stock 350 engine. 

I would upgrade to an electric choke, otherwise install the rebuild kit and use the stock jets/metering rods that it came with.

For low RPM operation and considering the power level the Allis Chalmers tractor drive train was designed to handle you may want to put a throttle stop on the carb or disable the secondaries. 

Tractor engines used governors to maintain engine speed under various engine load, but I'm sure a 350 truck engine will have plenty of power for what you are doing.......

Offline sploke

  • Garage guy
  • **
  • Posts: 7
Re: 17080213 carb being used in tractor application
« Reply #2 on: May 05, 2020, 06:19:10 AM »
Yeah I've had a few people recommend a belt-driven governor to manage the throttle...I'm going to try a direct linkage first and see how it works out.  I'm going to put a physical stop on the hand throttle control to limit top end RPM.  My biggest concern is the big 65lb chunk of cast iron flywheel.  Pretty sure that thing was not designed for high RPM ("high idle", or working RPM for the stock motor was around 1400rpm).

How would I go about converting to an electric choke?  I ordered a copy of your book, is it detailed in there?

Offline Cliff Ruggles

  • Administrator
  • Qjet Hero
  • *****
  • Posts: 5435
Re: 17080213 carb being used in tractor application
« Reply #3 on: May 06, 2020, 05:03:28 AM »
Here is the best way to convert to electric choke:

https://cliffshighperformance.com/Quadrajet-rebuild-kits-and-quadrajet-parts/electric-choke-and-pigtail-connector

It's a USA made part and "clocks" correctly with the correct release time.  There are a LOT of inferior e-chokes being sold out there that woln't clock correctly, work correctly or last much longer than it took me to type this!........Cliff