2015 A/T Nismo Tech Build

hustleman222

So I haven't weighed the car yet (good idea...I'll be getting on that). I was able to run the car with the 4.08 gears and only ran 12.75 @108mph with 90 degree heat again. So with this low hp I decided to get a second opinion and got tuned by another tuner. The results were very close to the original tune... Posted Dyno baseline was 316 whp and the new tune is 314whp. The shifts are a little different, much harder shifts now at redline (I love it). We have come to the conclusion that the AAM 3" dual exhaust isnt scavenging enough gas and I've ordered a single exit 3" exhaust and Y-pipe from ISR. Then it's off for another Dyno to see if the new direction works. I've also ordered a pulley set that will be going on after the single exit exhaust is installed and dynoed, because I really want to see if the whp is as advertised on the pulleys. If the weather cooperates then low times to come...fingers crossed.

Attached Images

1539075619916.jpg (74.0 KB, 21 views)

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

hustleman222

So I changed out the AAM R-Line exhaust for the ISR single exit and it's different. The AAM had a really good sound with no rasp...the ISR on the other hand sounds like I have a wastegate @2k-3k rpm then cleans up. I have a Z1 diff cover so for the AAM R-Line I had to trim a couple fins to fit on the left side. I was thinking since the ISR came out on the left side I would be good, but I was wrong. The ISR comes from the passenger side then crosses back over to the driver side so I had to trim a few fins on the right side of the diff this time. The fit on the new exhaust is pretty good, it is a tight fit the way it exits for sure.

Before and after pictures of the AAM R-LINE & ISR 3"

EDIT: The ISR exhaust might have just needed to get broken in, because the rasp is gone. Keep in mind the exhaust is paired with Motordyne ART pipes and they make everything sound better.

Attached Images

	1539401369922.jpg (132.6 KB, 10 views)
	1539401372430.jpg (160.3 KB, 9 views)
	1539401374808.jpg (153.8 KB, 19 views)
	1539401376591.jpg (127.2 KB, 24 views)

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