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my 4.8 going 10.05 @ 137

   
Old May 2, 2015 | 09:59 PM
  #41  
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Originally Posted by la del 11
Lol ..... South texas ! Lol ... I had 3.90s but decided to rev the engine a lil more up top
Figured .. Y'all have some really nice **** and some of the fastest trucks
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Old May 2, 2015 | 10:06 PM
  #42  
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Congrats man! That's pretty dang fast!
I run 4.56 gears in my twin Turbo 4.8 And I love it! These little engines need the gearing to get up and go.
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Old May 2, 2015 | 11:31 PM
  #43  
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Gearing and 4.8s isn't anything new in 2008 I had 488s with my 4.8 and pt88
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Old May 2, 2015 | 11:42 PM
  #44  
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Originally Posted by George C....
Gearing and 4.8s isn't anything new in 2008 I had 488s with my 4.8 and pt88
Wasn't that a manual trans?
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Old May 3, 2015 | 12:15 AM
  #45  
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Originally Posted by GMCtrk
Wasn't that a manual trans?
yes but 1:1 is the same in manual or auto
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Old May 3, 2015 | 05:13 AM
  #46  
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Originally Posted by George C....
Gearing and 4.8s isn't anything new in 2008 I had 488s with my 4.8 and pt88
Dammm ... How was that 88 behaving on 3rd gear? Thats good to know i think ill be going 4.56 now ..... U got me ! Im finishing 3rd @ 6850 i want to dip into the 7k
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Old May 3, 2015 | 05:14 AM
  #47  
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Originally Posted by 03regcab sierra
Congrats man! That's pretty dang fast!
I run 4.56 gears in my twin Turbo 4.8 And I love it! These little engines need the gearing to get up and go.
Thanks !! And yes they love the high rpm .... Im working on a distroke engine for the future!
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Old May 3, 2015 | 05:15 AM
  #48  
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Originally Posted by Shifty1
Figured .. Y'all have some really nice **** and some of the fastest trucks
Thanks for right now we hold the fastest ls based truck which is spike but we have some projects going on
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Old May 3, 2015 | 09:05 AM
  #49  
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Originally Posted by la del 11
Dammm ... How was that 88 behaving on 3rd gear? Thats good to know i think ill be going 4.56 now ..... U got me ! Im finishing 3rd @ 6850 i want to dip into the 7k
Truck was a t56 and it was shifted at 7500_7600rpms with a 30" tire out back

My 1:1 was 4th
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Old May 3, 2015 | 11:35 AM
  #50  
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Originally Posted by George C....
Truck was a t56 and it was shifted at 7500_7600rpms with a 30" tire out back

My 1:1 was 4th
Thats wat i want ...... But are u sure u were on a 4.8 ? Thats too much rpm !! Lol jk .....
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