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2017 infiniti Q50 AWD
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If I happen to get anything under 4.2 I’ll post it
With AWD it'll be a bit harder on a JB4 to hit 4.29 being about 150lbs heavier than a RWD.
With JB4 having no LC traction is a non issue for RWDs so they got the advantage.
But you are very close to breaking that though. Right combination of conditions, launch, shift rpm etc.. and you should have no problem.
 

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Back when I was JB4, I was able to cut 3.9s RWD.

An AWD car should be able to cut better, probably like a 3.7 on the street. It'll take some practice with footbraking off the line, but it's doable.

Here's the JB4 custom map 6 I had back then - this is full send and only recommended if you know you've got good 93, are watching temps and timing etc, and make if you've got a full turbo back exhasut setup.

RPM 1500-7000, interval 500 +3 +3.5 +4 +5 +8 +8 +7 +7 +7 +5 +3 +0

This is on a RS400, for a SS/Luxe add 5psi to all of those.
3.9s on a JB4 is pretty impressive regardless of drivetrain.

So you had traction issues holding you back?
I've seen plenty of RWD JB4s who deadhook no issues, but also aren't running 3.9s.
 

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Boxy is Hussain Boxwalla from Racebox.
 
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