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.

Keep forgetting that not everyone has a LSD.

And I still want to know why only 410hp... A Nismo with bolt-ons will give you 310-320. I'm not sure I would pay over $10,000 for another 100hp. I have to be missing something.

maybe it's in metric hp numbers? like all the euro guys post PS and KPW or whatever numbers?

just a thought because i agree with you. pretty mcuh any tt kit bumps most guys close to 500whp or tuned down for power wants or restrictions etc...

On their website they are using a Dynapack dyno. Hey dyno guys does that matter? I'll keep looking at their site.

Revzone

...seem to be AVO fans for injectors and pumps.

*Edit: Can't find any info on this kit on their site. OP, ask them what fuel they used for 410, what dyno, and if they have any dynos. I'm really curious now.

IIRC i think dynapack was the highest numbers? or the lowesT? idk it was one of the two lol

:wtf2:

Wow. They work on a lot of cool stuff based on facebook.

http://www.the370z.com/members/rid3_...e81357-092.jpg

ill leave this here for you guys to decide if that's the "GTM" kit or not. now one thing I will point out is that HKS made a kit for the HR 350 EXACTLY like the kit GTM produces(ed)[lol] same cast manifolds and all that good stuff so they could also be sourcing manifolds that route as well.

Huh..according to this the Dynapack has the highest numbers... -.- I'm getting more and more curious with everything I look into.

Differences between dyno #'s: Dynojet, Dynapack, Mustang.

410 might just be the base tune they supply with the kit so the shop might be saying it will be "tuned" but just using the canned one which is probably 400-420HP.

in australia the water in the toliet goes the other direction right? maybe the dynos do too? lol

yea the kit though may be pieced together since the couplers on the GTM kit had logos and the one in the pic has nothing.

sorta like a safe tune just to get you out the door and not go BOOM lol

Ok that might make sense. My baseline was 395 on stock fuel system and 495 after tune and new fuel system.

But since he is getting a tune...the final expectation is really important. It affects his decisions. There is a big difference between 400 and 500hp.

To phunk's point...after 450hp you need a better fuel system and LSD becomes much more important...you also need better than OEM tires! At 495 I can spin mine in first and second without effort and chirp them like crazy in third.

But getting a tune and getting a dyno tune are 2 different things.
They be getting him a tune but it is just generic, and for an extra fee you get a dyno tune (those add on costs).

Really good point. I am Mr. ASSume guy today. I assumed that if I was spending $12,000 on turbos I would get a tune. Without it I am spending all that money for just 400hp.

f i'm spending $12k on turbos then i would have the top level Fast Intentions kit. thats just me lol

but again i realize he's in australia so options may be limited especially with shipping costs.

you guys are correct, dynapacks USUALLY read higher than dynojets.

based on the picture ride famous posted, looks like it actually is just a GTM kit.

The HKS manifolds that GTM copied dont have the 4 bolt flange on them... GTM added that to it for external gate option.

well that would get you the turbo's but what about the instal, and tune, and clutch, and fuel, and gauges?

clutch? im 7AT. it'll cost me about $5k more for that :tiphat:

but i think the base price on their kit is $9k. add in some upgrades and tune it's like 12K no install i believe. just saying numbers wasnt being literal kit for kit that he has listed.

that's correct; regardless you and I both know it would be hard to copy a mold and "alter" it to fit a new market which you of all people should know GTM ISNT foreign to doing...

I went to the shop today, they told me that they have purchased GTM TT kits long time ago. But it does not fit properly, the reason is mainly because of Australia is right hand drive. The kit in the picture is modified base on GTM.

Unfortunately, they normally just upgrade the fuel pump by itself.
They told me base on the kit they provided, they can make 420RWHP & 427ft-lbs for me.

Thx for your suggestion, it's really helpful.

Right hand drive, that is what they told me.. US brand kits can not directly bolt on :icon14:

I wish I am in US, anyway thx guys so far. I am appreciated

OK guys, I am familiar with this shop and their dyno and I can confirm that this dyno has always read LOW by comparison with others, epecially quotes from the US and even a couple of Sydney-based dyno's, which is why the OP needs to chill a little and not get too overwrought. He needs to do some more reasearch including speaking to local guys here in Melbourne with the kit ....

Revzone imported the first GTM TT kit into Oz back in 2009 (OP - check the posts by TAO on the AU Z Form - I'll PM you the details) and they had enormous trouble fitting the kit to a RHD car, so together with some more recent and well-covered GTM related issues covered in depth elsewhere on this forum, they now offer their own kit.

I know of at least 5 kits running at 420-450 rwhp on base tune, so I would strongly suggest that the OP contact some of the local owners as the dyno numbers being quoted do not replicate south of the equator .. in my experience, the numbers quoted on US dynos are rarely replicated here.

I have PM'd the OP with more information.

Great insight BGTV8.