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RX-7 1st Gen Specific (1979-85) RX-7 1979-85 Discussion including performance modifications and technical support sections

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Old 10-04-2013, 05:37 PM   #1
Rotary Evolution
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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.
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Old 10-05-2013, 05:32 AM   #2
bowjangles
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how old is my B-13?

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Originally Posted by Rotary Evolution View Post
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?
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Old 12-27-2014, 02:47 AM   #3
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Please help identify my motor (13b)

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?
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