2010 370Z NISMO Twin Turbo build courtesy of GTM

wishihadnav

however i believe the Greddy kit uses disco potatos which are known to push 3 inch piping without any trouble..

LiquidZ

Actually, TD06SH-20g's.

Disco potato is a Garrett GT2860RS.

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wishihadnav

^oh 20g's aren't too bad..id probably ditch those however n run 28r's..haha

stormcrow

Single vs. dual is apples to oranges. Bigger is not always better, even when speaking of FI applications. If it were, why not go 4" or 5"? The reason is that exhaust flows in pulses and if it gets too cool due to a slower rate of flow (bigger exhaust will flow more slowly..especially if oversized for the application) the fluid dynamics change as well as the weight of the air mass. This can cause the exhaust to "back up" in the exhaust sytem and the motor to work harder to expel it.

In truth, with the bends, length, resonators and such in place in different exhausts, it is hard to truly say what diameter exhaust will flow the best. Only flow rate tests can determine this. Who has time for that?

EDIT - BTW, the most restrictive portion of the exhaust system is the manifold(s).

Mike

troof!

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NISSAN: 75 280Z / 86 300ZX GLL /87 Sentra SE / 03 350Z / 23 Z
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toner123

Like you I did go with the internal wastegates. Like I said for the kit wise I stuck to your build for the most part. Simply because you had the same goals as me and the biggest reason to be honest this will be the first FI i did and you have struck me as a person that knows what is going on and how to do the job right. I am extremely excited to put this together and install it on my car. I have a buddy that is going to be helping me that is well qualified with this type of stuff and Sam told me that my kit is going to be shipping with the instructional DVD(thats why my kit hasn't shipped yet). It seems to me this 2.5 or 3 in exhaust is a ongoing battle like i said earlier to fuz and i think it mainly comes down to your goals. I am going to stay with the 2.5 and ride it out and see what happens. I have a strong feeling that it will turn out well and because of Sam's words which i quote "You will not be disappointed".
Frank

FuszNissan

Well, to play devils advocate, I am running a 3" catted down pipe, into a 2.5" true dual exhaust. I am tuned at 470RWHP and locked at 6.5 psi.

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LouFuszNissan
ZDAYZ 2012

stormcrow

With the internal gates you will be better off with the 2.5" all the way around combo. I would say, though, to stay within the 450-475whp range. I turned up the boost on mine yesterday for the first time to the high boost of a whopping 8.6psi and 520whp and traction was an issue. Second gear hated me and I quickly reverted back to the lower boost. It was not so much the upper HP causing the issue, but the higher torque numbers down low. Too much for the street IMHO. I think I'm just getting old. *haha*

toner123

yea thats where i am going to stay i don't want anymore then 500rwhp. Like i said i am super excited and can't wait to get this all done. I took a week of leave that way i can just sit down and take my time to do this. My Buddy is going to come over and help me out on the weekend to get me started and provide direction if I have any questions and after work he is going to shoot over. As for getting old I don't think thats the problem with not being able to stick lol. I think others between this forum and my350z were having this issue also with all stock. I don't know maybe I made that up lol. The last concern I have is just my warranty. I understand that I pretty much tossed that out the window on the engine and drive train, just if my headlights don't work I don't want the dealership to be like Ohh yea they don't work because of the TT kit you installed so warranty wont cover it lol.
Frank

PS fuz since I seen you reply on this, off topic I am in the market for a altima coupe new(hint hint). I spent my money to play now she want to play also, can't blame her lol

toner123

hey storm or anyone else, i have a question do you think I need a electronic boost controller. If so i have to figure out where the heck to put it lol. Thanks
Frank

LunaZ

Agreed! It looks like a lowered Nismo with an exhaust and intakes.
If it was my car, I'd skip the pillar gauges because I think they add a hint of "rice" to what is a phenomenal, beautiful car that doesn't announce it's been tuned until it's GONE!

Hmmm... new patio and hot tub or GTM TT?

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bullitt5897

Depends on your goals. If your just staying with what the base kit offers "no" you dont have to have it. However, It is an option that most and even my self would urge you to get. A boost controller must be met with constraint! Just because you have one doesnt mean you need to turn the boost up!

For instance Sam@GTM and I are building the 1st 1000+hp 370z right now. I for the love will NOT be running that high of a HP and Boost on the street unless I cross a Bugatti Veyron in which I will proceed to hand him his @SS!!! lol.

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Shop Cars: 2013 318whp Nismo VspecII 370z *SOLD*, 2009 1000hp+ 93oct 4.0L TT 370z Fast Intentions STAGE 4 #054

stormcrow

I think you're ok there. *haha* Magnusson-Moss Act keeps vehicle manufacturers honest in that regard.


I would certainly go with an electronic boost controller of some sort. Especially with the internal wastegates. Great insurance to have. I went with the HKC EVC 6 and mounted it where the dummy switch cover was in front of the cup holder. I have zero switches there since the NISMO comes stripped and not equiped from Nissan. *haha*



I actually thought of doing this. But, again, my build was budget conscious and I didn't want to go through the extra expenditure of custom work placing the new gauges. The most obvious place would have been in the dash as OEM gauge replacements, but I prefer the OEM gauges are left untouched. A custom console/cubby placement could have been an option, but I use my cubby as the Z has otherwise no storage - and, again, I didn't want to get into custom costs. The cups are much less obtrusive than an A-Pillar pod, so the gauges are cleaner and less noticeable. Even from outside of the car.

toner123

Storm or bullitt do you have another option to where I can put it at. I am going to probably get the one that storm has in his car but i can't mount it where his is because I have the the touring model so there are two switches there for my seat heat lol. Guys thanks alot i must say that you have made something I really wanted to do a reality for me and for ever gracious. If you are ever in the virginia area my door and a hot meal will always be open to you

tao168

Just wondering you guys install a turbo timer? If so how was the wiring done. Looking at installing 1 but been working at the wiring for sometime.now