Bad timing

[Punkb]

Ok sooo I have a 2016 gt
I have done bbk 1-3/4 long header catless,mbrp catback, jlt intake lowering springs steeda brace bushing and aligment kit and lund tune I've ran only 12.98.
The weather was great (20*) and great track prep
As many times I tried to lunch and race I wasn't able to bring the time lower (stock tire ) 373 axle .
I used to have a 2014 gt with jlt intake bbk 85mm TB Barton shifter and muff delete ,Bama tune and I ran 12.6 all day long on slicks (373)
I send a data log to lund and thy say my tune running perfect
Im afraid to putt slicks on the 16 do to the half shafts
Whyyyyy; ((((

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[kcc0521]

We need to see your time slips. I would have to guess your 60ft is really bad. What was your 1/8 and 1/4 MPH. Did you hold the car in 4th or go to fifth? Did you turn off the advanced traction control?

 

[Punkb]

Don't have the slip but 1/8 is aproxy 8s 1/4 speed bout 113m
And red light 4th at the finish
All electronic r off

 

[2015 Silver GT]

Your problem is trying to run on a street tire.

 

[Punkb]

I'm afraid to put slicks on cuz I read that the half shaft hate slicks even on stock power

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