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ls or b16 trans

Discussion in 'Forced Induction' started by 93y7, Jul 25, 2009.

  1. 93y7

    93y7 New Member

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    i have read alot about which trans to use. i have a turbo ls with a b16 trans. all i do is spin. some say that the ls trans is better for boost. im dynoing it again monday to see where my peak power is because i forget. with the b16 trans somehow at the end of the track i have 4th gear to 7000 rpms and only trapping at 92-94 mph. which trans would be better and why. please dont just say longer gearing because i would like to know why longer gearing is better. i was thinking maybe because when i shift i go down to 5500 and im almost out of peak power
     
  2. phyregod

    phyregod !!YTINASNI

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    LS has longer gears so you can stay in the boost longer. You'll be slower off the line and to the 60' but your trap speed will jump up quite a bit.

    Post your numbers... You should be trapping alot higher. Also, you on slicks? Street tires?
     
  3. FLounder

    FLounder power hungry VIP

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    yeah that trap speed is low for boosted...

    what kind of 60 ft are you running?
     
  4. 93y7

    93y7 New Member

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    radials. i was spinning and got 94 not spinning and got 92. my 60 ft spinning was a 2.5. will i run faster 1/4 time with ls trans?
     
  5. FLounder

    FLounder power hungry VIP

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    you should be able to get your 60 ft time down to a 2.2-2.3 with either transmission on street tires. work on your launch some more. i race at moroso with some other guys with integras and everyone can hit 2.2-2.3 regardless of what transmission, and thats not even boosted. i hit 92 mph trap speed with only 160 whp in a 2700lb teg. and my friends bolton gsr hits 95 mph.

    just curious, what kind of wheel horsepower do you have?

    i think that changing to a LS transmission probably would not change your 1/4 mile et very much. if you had very high horsepower it might make more of a difference. i think traction is the more the issue, compared to staying in boost longer...
     
    Last edited: Jul 26, 2009
  6. 93y7

    93y7 New Member

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    60 ft 2.5052
    330 ft 6.5481
    et @594 ft 9.1482
    1/8 et 9.7251
    1/8 mph 77.98
    1/4 et 14.8531
    1/4 mph 94.57
     
  7. 93y7

    93y7 New Member

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    i think the gearing does it. i full spool by 3000 rpms. i shift and i only go down to 5500 and redline at 7200
     
  8. CAFROG

    CAFROG Honda Minion VIP

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    I ran faster then that with an full interior LS swapped EG Si with I/H/E (14.78)
    And everyone's right about 2.2-2.3 (2.2 is a very good launch)

    So even with a 2.5 60ft....you should be in the low low 14's or high 13's with your set up @ 8lbs
     
  9. 93y7

    93y7 New Member

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    the track i went to is notorious for bad times. my friend has a built gsr with b16 head pushing 360 and only ran a 13 8 there. track is very slick
     
  10. CAFROG

    CAFROG Honda Minion VIP

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    If its notoriously slick....you should be fine with 8" slicks. Axles should hold up better on a slick track....better then if it was a sticky track
    I would at least try finding someone's to borrow or buy used (to see the time difference at least)
     
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