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Y1 tranny - 70mph + 5th gear = 4,250rpms???

Discussion in 'HYBRID -> ED-EF / DA' started by EF9_boy, May 21, 2010.

  1. EF9_boy

    EF9_boy New Member

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    Like the title says I am using a Y1 tranny with lsd and in 5th @ 70mph my tach is sittin a 4,250rpms. Is it really supposed to be that high?
     
  2. K2e2vin

    K2e2vin Senior Member

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    It may have a 4.4 or just simply be stock. My DOHC ZC transmission with 4.25 FD, which is similar to the Y1, was turning close to 4000rpm @ 70mph in 5th.
     
  3. GSRCRXsi

    GSRCRXsi Super Moderator Moderator VIP

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    yup. it is. short gears rock. i never have to downshift lol
     
  4. EF9_boy

    EF9_boy New Member

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    this might be a dumb question but it really shouldnt effect mpg turning rpms like that should it?
     
  5. EFDX

    EFDX New Member

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    the weight of your right foot has the greatest effect on mpg
     
  6. George777

    George777 ^^ Likes Bewbies

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    Truth right there.

    The higher rpm's will result in slightly less mpg's, but there shouldn't be anything drastic.
     
  7. K2e2vin

    K2e2vin Senior Member

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    Depends on how high you go.

    <-57MPG(hwy) cruising at ~3700-4000rpm/70-75mph
     
  8. EF9_boy

    EF9_boy New Member

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  9. Chavezcraz

    Chavezcraz got bseries?

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    Don't feel too bad. I had a geo tracker that was my DD for 2 years that i drove on the interstate doing 65 @ 5,200 rpms. Redline was 5,500. I wasn't worried about the gas mileage, it was the high reving for long periods of time that scared me. Long story short the engine finally gave way via a giant crack in the block
     
  10. isthisnameok4u

    isthisnameok4u New Member

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    my 88 teg had 4:40's and revs were about the same, I pulled 40mpg on more than one tank and usually around 35 or higher. Now you know why I only use shell gas.
     
  11. eg6sir

    eg6sir Supa Mod Moderator VIP

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    my b16 tranny would turn 4400rpm at 80 in 5th.. GSR tranny turns 4k at 80mph
     
  12. EF9_boy

    EF9_boy New Member

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    yea mine is pretty close to that.... runs like a champ :D
     
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