How old is my 13-B?

[Rotary Evolution]

if it has a hitachi it is likely a 74-78, i don't see why anyone would bother trying to make it work on a late series 13B.

74-75 had the old slanted MAZDA logo(all capitals), the 76-78 engines have the traditional logo used up until current.

[bowjangles]

Originally Posted by Rotary Evolution

if it has a hitachi it is likely a 74-78, i don't see why anyone would bother trying to make it work on a late series 13B.

74-75 had the old slanted MAZDA logo(all capitals), the 76-78 engines have the traditional logo used up until current.

If, by logo you mean the word MAZDA on the engine block, then it must be a 76-78 engine cuz the word is in upright (not slanted) letters- is this correct?

[ACE Rotor]

Hi guys, plz help i.d where my 13b is originally from.
it has pollution gear on it.
my car is an rx7 series 2 and originally came with a 12a.
id like to know the year the 13b is from so i can look up ignition timing references
i suspect the breakerless ignition with 2 vacuum advance units on it are from a 12A?
are the dizzis interchangable between 13b and 12a?