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change in 1/4 mile ET?

1688 Views 41 Replies 19 Participants Last post by  crumbie50
Of course I installed LT's and 4:10s blah blah blah... just like everyone else the 4:10s made the biggest difference in ET but the headers ehh not so much. So my question is how much of a difference will a tuner tuned by the right guy make in my ET. Keeping in mind I'm lucky to run a 13.9 lately and has never been tuned.
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i can't have an automatic if i have a tri ax. hmmm i'll go look jackass. anyway, can powershifting really make up .6 or more? also what rpm would work for take off? I've been taking off at 1200 give or take.
oh yeah i'm running 555r's and bfg's in the front + eibach springs
ok my 60' is 2.12 and 1/8 is 9.18. my reaction time was .63. also i'm not a slow shifter and i shift just before redline. it feels like once i hit 3rd my power is gone. to me it seems like my take off is good but my car is sluggish the last 1/8 mile. and i have been running 27 psi in the back and front. traction doesn't seem like a problem to me. idk maybe i'm wrong.
what rpm do ya'll usually launch at with drags.
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