I knew the stock hood was light, but dang. A CF hood is 3 pounds heavier?

Yup...from what I've read, the dry carbon is lighter and cost 2x as much

EDIT: FOR HOTRODZ: We have the camber actually set at a positive

Ok I added a few more carbon pieces for looks. I am currently debating if I wanna add coilovers or do the 2 piece rotors. Im not convinced which will give me a better launch...please help! I also did a custom catch can setup. At first I had it going back to the manifold via the cjm fitting and removed the pcv. This didn't work out so well...I drew up a ton of oil and had a few misfires. I now have the manifold capped and cans vent to atmosphere.

You really got the bug! My 2 piece rotors from Z1 shed 44 pounds off the Z and the steering and handling is awesome!


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Sorry Rod, I went with the coilovers. I installed the Stance XR1 true coilovers with Voodoo13 rear camber and toe arms with an alignment to take out the camber. I ordered the rear diff cover upgrade from Z1MOTORSPORTS with the new bushings, once I have that installed I'm going to make a couple passes. Hopefully I can get under the 12.5 number. Also just lowered the ride height just a little; Front: ⅞" ----- Rear: ½"

Well I’m sure the rotors are in her future. Sounds like she’s turning into a track car! I got my instructor certification for PCA and NASA so when you’re ready for the 2.75 instead of the 1/4 mile just let me know.


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Well with the suspension mods and I also swapped out the read differential from the 3.69 to 3.91 gears with whiteline bushings. Went to the track and had a bit of a disappointed showing, but the air quality was crap (96F degrees). Intake temps were above 120F and the 60' was nowhere near where it needed to be and the trap was slow. I ended up running a 12.76 @ 109mph but probably had a better pass that was closer to a 12.6 but I let out about 150' from the finish line to win the bracket race and crossed with a 12.83 @101mph. More to come.

After going the drag strip, I came home and swapped out the rear diff again. This time we went with the 4.08 but wasnt able to go to the strip again because of the rain...so I was super bummed out. I'll have to wait another 3 weeks before I'm off again for the weekend to run again. Just the other day I installed the 2 piece rotors from Z1, so you can imagine the difference I should feel from last fall. This I hope will be the last and final install to get the fastest 1/4 mile pass for a N/A 370Z. Driving around with the 4.08 gears is different, I no longer have a 2nd gear lol...it's a quick blip in and out of 2nd.

Sub'ed from Houma

Hopefully you can make it out to the strip one day this fall. I'm hoping to get the record this fall.

You thinking October?

My best time will probably be a little later than that...needs to be much cooler temps...October will probably have 90 degree heat still.

Following this! Nice work so far!

How much does that whip weigh in track trim with driver?

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.

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.

Did you figure out which rear gear was best?

What I do is correct my runs to sea level using the current density altitude at the track that day.

There is an online link that will look it up for you here:

https://airdensityonline.com/us-track-list/

Once you know your DA plug it in here with your timeslip data:

http://www.dragtimes.com/da-density-...calculator.php

Then you can compare car performance with various modifications directly.

I got your weights you asked for...with driver & 5 gallons of fuel: 3540 lbs - driver weight: 201 lbs = car only: 3340 lbs. These weights are with the ISR single exit, so if AAM R-LINE was still on then add another roughly 20-30 lbs as the AAM R-LINE exhaust weights a heavy 63 lbs. I am sorry but I was too excited to install the ISR exhaust that I completely forgot to weight it.

Wow!

Mine is 3450 with 250lb driver in race trim = 3200 lbs car only.

Damn! How?!

I am looking for some 12.70s when the freaking rain stops.

Mine is a 2010 touring 7AT with out nav.

Light 18” Enkei rear wheels and light MT 285/18 drag radials.
Stripped trunk no spare jack or sub or plastic.
Factory spare fronts with 18” MT skinnys.
Z1 2 pc front rotors.
Test pipes Motordyne ART
Odssey PC 680 battery.
Akrapovic CBE exhaust

5 gal of fuel

Ohh.. and one weight penalty 48 row true cool oil cooler.

We were supposed to have a cool front come through last night so I went to the strip. I really thought I was going to do well but the air quality was crap and the cold front never came through. A/D was right around 1400 and ran several 12.75 with 2.06 60' which is terrible, I'm used to running 1.91 60'. I made a couple adjustments to the coilovers and got it down to 12.71 but still with a 2.05 60'. I've got to make more adjustments to the suspension because my 60' is trash now ever since going to coilovers.

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.

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.
:tiphat: :happydance:
12.44 @ 111

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

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!
:driving:

Well, i just put new whiteline bushings in when I did the 3.69 pumpkin install. I will check them again however, because they really helped with wheel hop over the factory bushings. I am thinking now I may have had too much tire pressure..@ 23 psi in the MT ET STreet SS.

The car went sideways on my last run shifting into second, so I just aborted the whole run.

Send that 3.92 pumkin up here to OKC, and heavy dual exhaust. Maybe that will help get this heap to run like yours!

Do you still have the vlsd traction device or other?
Also with a good even burnout (not powerbraking); you should have no wheel spin....could have had poor track conditions.
:tup:

Yes I still have the factory VLSD with the 3.69 gear.

There was rain all that morning, and they were struggling to keep the track dry.

I have the Ecutec throttle hijack working so burnouts are no problem!

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.

The E85 A/F seems off to me.

I re-dynoed mine last week on E85 and it was at 12.8.

I would dyno tune it and run it with the 3.91

Great work by the way!

Oh it's off for sure... actually started throwing lean codes on e85

And just fyi, I think 12.8 for E85 on my rig is too rich...

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


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Wow, I knew it was a long time since posting, but I didn't think it was this long. I still haven't bested the 12.38 :( and alot of things have changed. I ended up having my CSF Radiator crap out again in July, so since I had it out I did a JWT C2 cam swap. I had the car dyno tuned and made 329whp on pump gas and 336whp on e85. I went to the strip and ran a 12.71 with the 3.69 gears (very disappointed). I swapped to the 4.08 and ran a 12.51 (extremely disappointed). I then said screw it and decided to go balls deep and bought a spare transmission and sent it to IPT to build the trans with the shift kit and 3500 stall. While in there I changed the flex plate to the Fast Intentions. I did a base brake swap on the rears to fit on the new wheels with 275/60/15 tire. I went to the strip last weekend with the front spares on and ran a 12.57 in 85 degree heat (1496 AD). Not what I was looking for but couldn't get the car to stall past 2200rmp, so that is something I have to look into and try and get the rear brakes to hold better. I was able to get the car weight right around 3200 lbs. I scaled the car on the way back home with a 1/2 tank of fuel in the car.

BTW: I have a Stage 2 Soho single turbo setup that should be on the way soon, it was ordered back in November with upgrades to the injectors (1300) and the fuel pump (450).

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.

Dude, you have done a ton of work!

Where does it seem to be off at? 60' times or the whole run?

Was it 3220 lbs - with or without driver?

60' is unchanged, still a 1.9 because I can't stall up. And this is weight without the driver.

Soho stage 2 kit came in and I sent the piping and intercooler off to be powdercoated to match the car a little better. I did upgrade to the CJM fuel return with top hat. The car has been in the shop because in June some askhat backed into the car in a parking lot and put his trailer hitch through the front bumper. I've got some new brake pads in that are meant to be for cold braking. As soon as I get the car back I'll swap the pads, lines and make an adjustment to the e-brake. I ended up getting another rear diff with a vlsd with 3.3 gears. I'm gonna try and hold off on installing the kit to make a couple hits on the new setup. I have also ordered a set of rear drag coilovers from IDS to make sure the car is ready for anything with the suspension.