2015 A/T Nismo Tech Build

hustleman222 · 01-04-2019, 09:22 AM

I know it's been a while since posting any updates, but I have been trying to make strides. I swapped to an underdrive pulley from NST. I dynoed the car on a different dyno jet that I've never used and still 315whp. So it wasn't at difference at all. Money wasted if you ask me.

So the best I could on the 4.08 gears was a 12.40 on pump gas with the new setup. I then decided to swap fuel pump and injectors for e85 and etune. At the same time I swapped back to the 3.91, (I didn't try 4.08 on e85 because I was running out of time to get my runs in before the track shuts down). I was really thinking the 3.91 would do better for the 7at, but after a etune I ran a 12.38. I was data logging the runs and the a/f ratio were not very favorable to say the least (13.5 at WOT on e85). I am thinking a Dyno tune and retry the 3.91, 4.08, and even do the 3.69 before doing anything else.

Now I'm at a crossroads, cams or just boost the car. But I need to do a road course a couple days and see what she does.

osburnrs · 01-04-2019, 02:55 PM

Quote:

Originally Posted by hustleman222

I know it's been a while since posting any updates, but I have been trying to make strides. I swapped to an underdrive pulley from NST. I dynoed the car on a different dyno jet that I've never used and still 315whp. So it wasn't at difference at all. Money wasted if you ask me.

So the best I could on the 4.08 gears was a 12.40 on pump gas with the new setup. I then decided to swap fuel pump and injectors for e85 and etune. At the same time I swapped back to the 3.91, (I didn't try 4.08 on e85 because I was running out of time to get my runs in before the track shuts down). I was really thinking the 3.91 would do better for the 7at, but after a etune I ran a 12.38. I was data logging the runs and the a/f ratio were not very favorable to say the least (13.5 at WOT on e85). I am thinking a Dyno tune and retry the 3.91, 4.08, and even do the 3.69 before doing anything else.

Now I'm at a crossroads, cams or just boost the car. But I need to do a road course a couple days and see what she does.

Come run NASA at NOLA with me on the 19th. I’ll see if I can be your instructions.

Sent from my iPhone using Tapatalk

hustleman222 · 03-23-2020, 01:41 AM

While doing the cams I discovered that the 2015+ models all came with a beehive style valve spring. So the JWT cams come with a old style spring so I had to find the older style retainers for the valve springs. I swapped the OEM oil pump gears out for the Boundary oil pump gears. I changed the NST lightweight under drive pulley to an ATI Dampner in preparation to boost the car. I then did some painting of the timing cover and hydro dipped the valve covers carbon fiber.

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