1st Generation Specific (1979-1985) 1979-1985 Discussion including performance modifications and technical support sections

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Old 02-13-02, 09:25 PM
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what are the differences in a 85 13b and a 86 13b. Where can i find a 85 13b shop manual. thanks for the help.
Old 02-13-02, 10:37 PM
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85 13b is a 1st gen special edition (GSL-SE)

The 86-91 are the second generation RX-7s
Old 02-14-02, 09:43 AM
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differences are

Larger a/f meter, throttle body, and intake ports on the engine. smaller injectors. running a different computer, and wiring.

Also it has 2mm apex seals. where as the 84-85 has 3mm seals.

84-85 13b produced slightly less power but it is a longer lasting engine, and more reliable.
Old 02-14-02, 09:54 AM
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Buckaroo....

Haynes puts out a fairly decent manual, and it has a section covering 13B stuff. Otherwise get a "factory" shop manual available either from your local ignorant Mazda dealer, or Mazdatrix....
As I understand it, the wiring harness is much different on the 2nd gens from the 1st gens....It sure is on our '87 2nd gen parts car....

Denny, from the 'ol corncrib....
Old 02-14-02, 10:11 PM
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Thank you for the info. Here is the situation... I bought an 85 SE, got a new engine, and turbo as a package deal. I need to know how to tell the difference between an 85 and 86 engine. Would I be better off buying the Hayes 86 manual because I have the 85 manual, but it doesn't cover enough infor on the 13b. thanks again. Yadda, yadda, yadda...




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