Current Classifieds

ENGINE COMPLETE 1971 PINTO
Date: 12/28/2017 03:55 pm
FLOOR PANS
Date: 06/12/2020 07:24 pm
Great Cruise wagon

Date: 12/17/2016 03:39 pm
76 pinto sedan sbc/bbc project for sale $1700 obo

Date: 03/27/2017 10:07 pm
79 Wagon with many extras
Date: 07/08/2020 04:18 pm
72 pinto drag car

Date: 07/08/2017 08:25 pm
2 Pinto Wagons for Sale

Date: 10/29/2018 02:02 pm
1973 Interior parts wanted
Date: 01/02/2017 11:02 pm
2.3 engine and other parts- Free
Date: 12/13/2016 10:25 am
Bumper Guards
Date: 03/28/2017 09:27 pm
1979 Runabout Rear Panel
Date: 01/04/2020 02:03 pm
1975 Ford Pinto

Date: 01/13/2020 11:02 am

Author Topic: Ignition Timing Question  (Read 208 times)

0 Members and 1 Guest are viewing this topic.

Offline WTodd6

  • Pinto Driver
  • *
  • Posts: 2
  • FeedBack: +0/-0
  • Another Pinto Driver

  • Total Badges: 2
    Badges: (View All)
    Topic Starter Mobile User
Ignition Timing Question
« on: August 18, 2020, 08:49:42 AM »
Why did ignition timing go from 6 degrees tdc to 20 degrees tdc on 2300 with auto trans from 1975 to 1976?

Offline Wittsend

  • Pinto Master
  • *****
  • Posts: 2340
  • FeedBack: +241/-0

  • Total Badges: 8
    Badges: (View All)
    Tenth year Anniversary Mobile User Topic Starter Poll Voter 1000 Posts Linux User Windows User Fifth year Anniversary
Re: Ignition Timing Question
« Reply #1 on: August 18, 2020, 11:49:09 AM »
Exactly why, I don't know. But a fair guess is that it either had to do with smog specifications or to compensate (idle in particular) for the awful smog devices of the day. It might also be how the timing was measured. There is  possibility that certain cars were set with the vacuum advance attached and that would elevate the timing at idle (hence the 6 vs 20 degrees) but upon acceleration timing would drop.

When one observes the smog devices of the 70's/80's it seems as if there were teams assigned to certain RPM ranges each designing a separate device and then they were just thrown onto the engine thinking it added up to a collective whole. I'm not saying it was that way, just that the end result has the appearance of such.

 Even the OBD I injection was a significant advantage over the carburetors of that time era. Some here have gone to the add on injection systems* while others have just adapted a complete engine swap from the 80's/90's Mustangs or Rangers.

*