2015 A/T Nismo Tech Build

SG4247

I cant figure out this nissan suspension. Ive made close to 100 1/4 mile runs in my 370 7AT and the BEST sixty foots are 2.01 to 2.02 in good air on drag radials. It has the 3.69 rear gear in it.

So I was thinking about coil overs or koni shocks. Sounds like thats not the answer? Ran 12.977 best after the rain stopped Friday night. The car was getting wheel hop shifting into second gear. Never had that issue previously.

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hustleman222

Went to the strip yesterday with nice air quality (air density = 670). I didn't make any adjustments to the suspension, I wanted to get a baseline run and it ended up being a 12.53 @110 with a 1.97. It wasn't a clean pass so I knew a better time was coming. Now I've moved up to #3 on the 1/4 mile list.

12.44 @ 111

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316whp/262tq 12.38 @ 110mph on 3.91 gears
336whp/273tq Didn't push it hard enough.
Turbo Time

hustleman222

I can't say the coilovers are the culprit because at the same time I swapped from 3.69 to 4.08 gears... And I was able to get the 60' down by leaving the line with less RPM. I was thinking the higher rpm the better, but I guess I'm just not hooking on the radials. (305/35/19 @ 18 psi). On 3.69 gears I would heat the tires up until white smoke about 7-10 secs, and launch at 1800 rpm and catch a 60' @ 1.95 with consistency. I hope this helps. PS... Check your rear diff bushings

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316whp/262tq 12.38 @ 110mph on 3.91 gears
336whp/273tq Didn't push it hard enough.
Turbo Time

jchammond

Yep; 60’ time is critical,as I was consistent 1.94-1.95’s w/heated street tires on stock suspension & 3600# car w/driver. I installed line-loc that really gives a good even heating of rear tires,,,never held against the brakes at launch-just flashed it.
I know with smaller tires & a little less weight would have gotten lower times w/3.69:1 diff....but everything came to a hault when I was crashed out otw home from track (1/21/18’),,,,i really think these cars are capable of bumping a high 11 under right conditions. Though high 12’s were my best with 345/30’s out back & my 275+ azz in leather Touring seats.
Keep at it,,,may want to try removing rear sway bar for some weight transfer & relocating battery to rear.
My run came with a full size spare in back,floor jack,over 1/2 tank fuel...but I was mostly checking launch & traction. I’ll be at it again after insurance gets straight with me.
Good luck fellas!

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