Another GTR TT Z
 

Well I finally decided to do TTs on my Z. I was reluctant to do it because I do put it through a lot at the track and heat was already an issue. But not having anywhere to go for a few months and having a lot of other maintenance and fixes to do along with a pretty good deal; I figured it was time for more power since I pretty much did everything else performance wise except aero. Which I will probably need next to deal with the extra power. Anyway here are some pics of the current state at Real Auto Dynamics in Ocean Side NY.

http://www.the370z.com/members/2011-...new-gtr-tt.jpg

http://www.the370z.com/members/2011-...402-gtr-tt.jpg

http://www.the370z.com/members/2011-...403-gtr-tt.jpg

http://www.the370z.com/members/2011-...rhead-view.jpg

Subbed. Excited to see more of these GTR/TT and upcoming BP/TT Builds coming out! Twin Turbos unite!

Congrats! Keep us posted on the rest of the project, please.

I would like to know how the power delivery works out on the track. SC is very predictable but a turbo car can be a handful when the boost builds unexpectedly.

Small turbo's that spool too quick can be a pain in the butt. Get a little bit bigger turbo and you get more control with your right foot. My car wasn't too bad.

I'm guessing it should be similar to a GTR minus the AWD. But I'm just going to have to relearn how to come out of turns. And of course heat will be an issue again, though I hope relocating the 34row Oil and 19row PS coolers to the stillen side ducts will help.

It will be a learning curve. I’m upgrading to 10 -AN fitting first my
Oil cooler. If that doesn’t help, I’ll go for twin coolers

Figured it was bout time for you :icon17: :tup: :driving:

The FI coolers uses an AN -8. Z1 uses an AN -10 fittings and hoses. Found this out when I was helping JL with his BP turbo install.

Yes, I could easily pass those 500+ hp Mustangs, Camaros, Vetts, and Dodges in the twisties but they would always blow by me in the straights. Not for long.

I know that feeling. :shakes head: I usually catch them on the brakes.

What made you go with the GTR turbo's?

Yup, I’m swapping them
Out for -10an

Its pretty much done, a few minor things left but it's up an running.

Coolant temp is a bit high in traffic. (Water, waterwetter, CFS triplepass)
Thinking maybe a manual fan switch paired with a better fan setup.

Need to replace the damage bumper.

Need to install guage pod and order/install dual band afr guage.

Install/order oil catch can.

Verify oil blow by is no longer an issue.

Replace windsheild washer bottle.

Get the ECUtek app working with my OBDIILink LX.

Cold start idle fix, revs only to 500rpm on cold start and have to give it gas to get to the normal 1200.

Oil pressure is about 10-15psi lower then before, 19psi idle and 70 at around 3k on the highway. Not really an issue, just an observation.

Full boost kicks in on or just before 4k so will be great on the track.

http://www.the370z.com/members/2011-...tq-gtr-tt.jpeg

http://www.the370z.com/members/2011-...425-183031.jpg

Congrats. Nice numbers...should be controllable and fun to drive with those numbers... I’m assuming this is what n 91 pump gas....

Lmk what option u did for a windshield reservoir replacement. Jayhovah has a pretty good write up for a DIY option.

TracSpec vents will help you in stop and go traffic stay cool.

Already installed prior.

Noice, i was just there at RAD getting my Z tuned, what turbo setup is that? Exhaust manifold goes right in to the turbo housing, is that aftermarket or is this a vr38dett turbos? Also those numbers are kinda low, how much boost and what octane is that?

EDIT: Ok on the second glance i see that those are vr38dett turbos, still how much boost and what octane?

I do have a CSF triple pass radiator. If you get one, just expect to replace it every 2 years.

Great progress! These turbos actually spool by 2800~~ with an aggressive tune. It's amazing for autoX/track.

I regret upgrading my GTR Turbos to be capable of 800 since it's too laggy for autox now. Do you have a return system already?

How the heck did I miss this thread...

Congrats on the new found power!

Yeah, pulled off a 16 GTR with about 70k or so miles if I remember right, it's their own plumbing. 12psi, 93. I ask it to be a conservative tune because I will be trashing this motor for 20-30min @5.5k-7.5k rpms if the heat lets me.

Why is that?

OEM reliability.

CSF radiators lasts about 2 yrs avg before they start to leak. Their quality seems to went down hill some the last couple of years.

OEM reliability went out the window soon as you went boost. Don't care ever if it's GT-R turbos.

Well that sucks so can we call CFS = Mishimoto

Just about.

I wouldn't go that far - I haven't gotten the feeling yet that CSF is intentionally trying to defraud people.

Naah, It has worked well for me so far. No issues. The radiator is cheap when you look at the overall cost of things. I will pay it every 2 years with no issues.

I didn't go that far. Other forums have reported the same things tho.

Wasn't contradicting you - just taking an opportunity to slam Mishimoto ;)

fify

Nice build, I can't wait to get my Z in there soon for the same build. Hopefully this month since yours is almost/already done.

How's the car feel now, power/tq? Also curious if the upgraded fuel pump still cuts at hard turns/up and downhill.

Hope you like it!

It feels great, totally different car now. Power and torque are where I wanted them to be, constant/predictable and early on, not really interested in peak power. I feel it would be difficult to manage on the track if there was a sudden power output change at 6k for example.

It's not the fuel pump that was the starvation problem, it's the tank. I have the CJM Road Race pump setup from the 2nd batch years ago and have never had a problem.

I love it! There are a list of little things that need to be done still but should be sorted in a month or so, not in a big rush yet.

One thing to note, the volume is significantly less now from the exhaust, my cut outs are pointless and I just leave them open all the time. There is minimal difference between open and closed and I can only tell when I am next to a wall.

For this winter is a custom 2.75" straight exhaust. And I thought I was done. :icon17:

The volume thing was something that I was super excited to hear. One of the main reasons that I didn't go for a SC kit was the noise. The drone with resonated test pipes is insane at the moment.

Speaking of noise, how are the spool sounds and bov?

I can kinda hear the spool, but the bov makes me smile every time.