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Thread: Early Vs Late 7M Blocks

  1. #21
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    Beefy_Heafy's Avatar
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    Default Re: Early Vs Late GTE Blocks

    It must be somewhere around there. JDMMA70 Is yours an ma70 or ma71 model? Im going to assume ma70 due to ur name Mine is an 88 "turbo A" model. I don't know what month though. Its model number says its an ma70 and it has the old style block and 6m crank although it also has the different ma71 body panels. Its head casting has an "A" instead of a number

  2. #22
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    Default Re: Early Vs Late GTE Blocks

    Quote Originally Posted by Jeff Lange View Post
    ECU's changed at the same time as the crank, there was no weird crossover as far as I am aware.

    Jeff
    Do me a favor and look for different cam part numbers around the same time.
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  3. #23
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    Default Re: Early Vs Late GTE Blocks

    ive seen a total of four late 88's so far that have the later style block so im wondering if they got them factory since it was so close to the 89 production date of Aug 88
    1988 Toyota Supra Turbo Auto Two-Tone Blue (21C)/Blue Interior
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  4. #24
    Dr. Jeff Lange
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    Default Re: Early Vs Late GTE Blocks

    Quote Originally Posted by Nick M View Post
    Do me a favor and look for different cam part numbers around the same time.
    Nope, cams stayed the same from 89-92.

    Jeff

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  5. #25
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    Default Re: Early Vs Late GTE Blocks

    Quote Originally Posted by Beefy_Heafy View Post
    It must be somewhere around there. JDMMA70 Is yours an ma70 or ma71 model? Im going to assume ma70 due to ur name Mine is an 88 "turbo A" model. I don't know what month though. Its model number says its an ma70 and it has the old style block and 6m crank although it also has the different ma71 body panels. Its head casting has an "A" instead of a number
    MA71 on the VIN
    MA70 on the firewall

    Turbo A's were made between Sept and October of 88.
    Mine was made in June of 88. I have the newer style block, dunno what crank but most likely the 6M. The Turbo A should have the later style block with the 6M crank.
    1988 Toyota Supra Turbo Auto Two-Tone Blue (21C)/Blue Interior
    Running at 85%


  6. #26
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    Default Re: Early Vs Late GTE Blocks

    Here is a piccy of my engine block and yes. It is the newer type block. My bad on that one


  7. #27
    Dr. Jeff Lange
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    Default Re: Early Vs Late GTE Blocks

    The blocks changed before the crank did.

    All 7M-equipped Supras are MA70's, MA71 is not an official chassis code for ANY Supra.

    In Japan, typically cars are given years based on production date, not "model year." Turbo A's were made at the same time as all other updated cars, they were not made earlier. Production started in 08/88 just like every other "89."

    Cranks & ECU changed in 08/89 production for "1990" model year.

    Jeff

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  8. #28
    Dr. Jeff Lange
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    Default Re: Early Vs Late GTE Blocks

    Discussion on Beefy's car moved to it's own thread, here.

    Jeff

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  9. #29
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    Default Re: Early Vs Late GTE Blocks

    Cool Jeff thanks. sorry for accidentally thread jacking

  10. #30
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    Default Re: Early Vs Late GTE Blocks

    Hey IJ,

    Do you have any photos of the front of the new "heavy" block?

    Did the new block come with the small convex brass core plug installed (the one behind the aluminum inner front timing cover?)
    Thanks

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