Super C Timing

Super C Timing Setup
Hey guys, for those of you who want to time your super c dynamically, I’ve made a few notes about what I did. By the way, by dong this I found out that my timing was advanced way too much and my distributor timing weights were not working, basically they were almost froze.
First I made a pointer:


Then I downloaded a paper timing wheel, it was a jpeg file (just do a google search) and then sized it to 5 ¾” using word to match the size of the crank pulley, printed it, cut it out, and glued it to some cardboard. I then used doubled sided tape to stick it to the pulley.


Then I purchased a piston stop for about $8.00, this is essential to get accurate TDC. A very good discription of how to use a piston stop to get TDC can be found here: http://www.4secondsflat.com/TDC.html


After finding exact TDC I marked it with a file and then filed a mark for every 5 degrees before TDC, I also did one for 16 degrees because this was my target according to the manual

The Manual


I then painted the marks, below is what 16 degrees before TDC looks like.


I needed an accurate way to get 1350 rpm, I couldn't use my old school tach meter because I have also installed a pertronix electronic ignition, so I purchased a laser rpm meter for under $20. To get a more accurate rpm I stuck an old saw blade between the throttle and the serrated teeth so I could fine tune my RPM.


This little unit comes with reflective tape, I just put a piece on the pulley.

I am so glad I did this little project. Very worth it.

Kool!
Iv done a simular set up!
My queston is where did you find this chart? and is that 15 or 18 degrees at 1350 rpms?
What other tractor Engines are on the Chart?
Thanks Cliff S

Hey Cliff,
It's the shop manual ISS-1039-1 "4 Cylinder Carbureted Engines" It is part of the service manual for super C's that I purchased on this site. It is found in section 1 under General page 38 and it is 16 degrees at 1350 rpm.
There is another pretty cool chart on page 24 that shows all of the IH distributors and the specific amount of advance that should be expected at various RPM.

The chart shows timing for the following:
C-60 20 degrees @2500
C-123 16 degrees @1350
C135B 20 degrees @2400
C-146 20 degrees @2500 (405 814 R91 distributor)
C-146 17 degrees @2000 (381 687 R91 distributor)
C-153 20 degrees @2400

I also just got a pdf of all the documentation that Zenith has for the new 14007 carb. I could share that if others want it.
Matt

Thanks Matt!