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  • 1965 - 1973 Classic Mustangs -General/Talk-
  • Classic Mustang Specific Tech

initial timing, spark plug gap,

  • Thread starter Thread starter Stang_1973
  • Start date Start date Mar 26, 2009

Stang_1973

Founding Member
Jul 13, 2001
565
9
38
San Antonio, Tx.
Mar 26, 2009
#1
  • Mar 26, 2009
  • #1
Ok well, i plan to finally get some stuff don this weekend and next week. Carb is coming off for a rebuild. Gonna find and take care of oil leak. I believe i fixed my vacuum leak, will onfirm after everything is back together.

So, since ill be doing a tune up, considering the mods in my sig, what shouold i gap the plugs? I remember back like 2 years ago, my mechanic said they should be a little hot but i dont even know what they are supposed to be gapped at.

Also Since i will be getting the car to run right and tuning the carb a bit, i know i should firt have the correct timing, so what shoud my initial timiing be set at according to my mods.

Thanks guys.
 

LRSjmac

Premium Sponsor
Sep 9, 2008
335
0
17
Hewitt, Tx
Mar 26, 2009
#2
  • Mar 26, 2009
  • #2
Finding your optimum base timing will take some time at the track, but a good starting point would be 14 degrees initial. As for plugs, run either a Motorcraft ASF42C or Autolite 25 gapped between .045 & .050.
 

brianj5600

Active Member
Sep 19, 2003
1,964
2
39
Middle TN
Mar 26, 2009
#3
  • Mar 26, 2009
  • #3
I agree. Your motor will be happy with more initial than stock. I am not sure what distributer you have, but if it is an original 1973 model, it may have way too much mechanical advance. Here is some good info on durasparks. Duraspark_distributor_recurve_instructions_index Mine had 40 degrees of mechanical advance. I ended up welding the windows up and grinding them down to get the desired amount of mechanical advance.
 

Stang_1973

Founding Member
Jul 13, 2001
565
9
38
San Antonio, Tx.
Mar 26, 2009
#4
  • Mar 26, 2009
  • #4
Sweet i got the autolites, ive always loved em.

Thanks hopefully this time next week ill have back on the street running nice, oh and with new power disk brakes.... kuh! hahaha! i cant wait.
 
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