Question about Twin turbo kits
 

Hi all

I got the quote from local tuning shop in Melbourne Australia, approximate 12500 US dollar, this is include fitting the TT kits and tuning. They claimed that they can achieve 410 rwhp.

My question is
I. Does the figures look all right? what do you guys reckon?
II. They also recommended me to go for oil cooler, boost controller, LSD and Clutch. If im not going to get all of them, Which of them do you guys think are necessary?

The twin Turbo kits include

•Cast iron exhaust manifolds
•Turbo manifold heat shield
•Garrett's ball bearing water & oil cooled turbos GT2860
•Front mount inter cooler
•Aluminium inter cooler piping kit
•Speedpro braided oil and coolant supply and return lines
•K&N cold air intake filters
•50mm blow-off valve
•Upgrades fuel pump
•Upgraded injectors
•ECU remapping hardware


http://www.the370z.com/members/snsd-...re81356-tt.jpg

Cheers

Does not seem that far off base, I would agree on the oil cooler and clutch/flywheel/csc since the transmission will be done you may as well.
Questions I would have:
-What size injectors & brand?
-What size fuel pump & brand?
-Is this a shop made kit or something by a shop in the US or Japan?

Only 410? What octane do you guys have? I get 490 on 91 octane.

- Oil cooler...MUST
- 5 or 6 puck clutch...MUST.
- Lightweight flywheel...meh. I think they help with throttle response but they add noise and it is not a good one. Up to you.
- CSC...your stock will fail it is only a matter of time.
- Boost controller...I have a 100 octane race, 91 aggressive, and 91 safe tune. Each tune has a boost controller setting. I don't know how anyone gets by without one. I guess if you only have one map you don't need one.
- Deal with your stock cats. If you aren't removing them just understand that you will be replacing them in a few years.

I'm with theDreamer asking about the fuel pump. Fast Intentions has proven that the stock pump cannot scale. This is an important upgrade.

I will ask them tomorrow, and let u know when I get the updates. Thx bro

Another factor would be which kit are they getting you. If it's the kit I think it is I suggest doing research. There's a fellow Aussie member who is having a nightmare trying to deal with said company.

Would you tell me which brand of fuel injecter and fuel pump are you using? appreciated

The pump and injectors usually depend on the manufacture of the kit, usually Bosh EVO14's and DW fuel pump. But I will let him answer also.

kinda looks like the GTM kit. if it is then go with a different kit would be my suggestion.

however i dont see their logo anywhere.

Bosch 650cc injectors (no idea what series they are other than *Bosch 650cc high impedance fuel injectors w/Denso plug
and play wiring adapters) and the Fast Intentions FAST-500 fuel system.

They did a whole writeup in July about their fuel system testing (happened to be tested on my car). I don't know if I should copy and paste their post...Search Fast Intentions on Facebook, read the Fast Intentions Twin Turbo thread, or just PM Tony. I'm sure he can tell you what you can get from them to drop in your setup.

It's not GTM. I think their wastegates are on top. I also think they use actual connectors and not silicone things for joints.

the BOVs were up top on the charge pipes.

the wastegates were all internal except the tuner kits had external dumps.

Sorry...BOVs. *is dork*

The intercooler doesn't look like its from a GTM kit either. I've torn the front end of a GTM TT kit apart to replace a leaking radiator before so I'm pretty familiar with it.

Got it...it is a REVZONE with Garretts...

Revzone Nissan 370Z Twin Turbo KIT VQ37VHR With Garrett Turbocharger Intercooler | eBay

Looks like its based on the GTM manifolds if I am seeing correctly. Perhaps they just buy the manifolds from GTM and make their own kit from there.

If you goal is only 410rhwp, than you barely need to worry about the fuel pump. The stock fuel pump will probably make it this far, but they will probably use a Walbro 255 anyway and that is more than adequate and very inexpensive. I would only ask them so you know whats in there in-case you aim for more power in the future.

For fuel injectors, as long as you are 550cc or larger you dont need to worry about it. Only a modern 48mm body length fuel injector will even fit in there anyway, so you arent going to end up with some old crappy injectors. Again, I would only bother to ask what size they are so that you are aware what is in there if you decide to go for more power later.

The stock fuel system with just injectors and a walbro 255 is MORE than adequate for 450rwhp or below.

Oil cooler is a must. Clutch and flywheel is a must. Boost controller I would avoid, just put in the proper wastegate springs to achieve your target boost since it will be low. Add a boost controller later when you seek more power down the road. If you have a stock LSD, I wouldnt bother upgrading. If you have the open diff, then you will need the LSD.