Hello, I'm new here but my name is Matt from Jattus Performance.
Working on twin turbocharging a 2003 Infiniti G35 Coupe, so figured I would make a topic to post pictures, progress, ideas, etc. And also to hopefully get some feedback, to see what you guys think or how it could be better.
Here is the game plan so far:

2x TD05-big16g water and oil cooled turbos
2x 38mm external wastegates
water to air intercooler system
2" charge pipes from each turbo merging into 2.5" to water intercooler, then to 2.75" to throttle body.
2.25" intakes, putting both of the cone filters in each fender well.
perfect power smt8t fuel controller used to fire a 7th injector (80lb injector)
2.5bar external map sensor paired up with smt8t

We are going to set both of the wastegates to 4psi for starters and tune like that. After that is dialed in then up to 8psi, which is where we will most likely keep the boost pressure (our goal is around 400whp).

I also want to utilize the OEM exhaust manifolds, and have the turbos bolt inbetween the OEM exhaust manifold flange, and the remaining exhaust. This will put the turbochargers a bit lower than normal, and will require an oil pump spliced in for the oil return correct? (Where is a good location for this now that we have a pump? Just oil pan?).

So far my only concerns is the space restrictions for charge piping, and oil return, but other than that it seems that it will work out pretty good.

One of the other main goals is to build a turbo kit for the car thats more easily bolted on to existing parts (e.g. bolts to exhaust manifolds), more of a universal approach to the fuel system (e.g. the 7th injector), and get reasonable power out of the kit.

 

Seems kinda overkill on just 400whp.

 

the guys on my350z are gonna have fun with this one

 

That's alot of work and money just to get the goal of 400whp. Plenty of kits out there which will meet your goals and spend less$$$. If you tryin to do all this you might as well go full custom and build the engine.. Just from experience.. the 2003 engine will last longer and sustain increased pressure if you build it. Don't waste your time on going FI on a Stock block.

my .02

 

guys read "Jattus Performance" I guess he wants to develop his own kit.

 

good luck with that...
http://www.jattus.com/Performance/home.html

 

So your selling your kit for $4,000 but you have yet to design, fit or test it . Another dreamer thread where are you putting the 7th injector why are you using an air to water intercooler. Your designing a kit but you don't know where to put an oil scavenge pump or how to wire it.

 

Uhm, where do you see me selling any Infiniti kit? Let alone for 4K? lol your mistaken.
Also, where did I say I don't know how to wire a scavenge pump? That statement also makes no sense...

I would prefer people to be constructive with me.

I like the water to airs because there is less volume of air to fill up before boost builds, so you get less turbo lag. Water to air intercooler cores are also much more efficient (e.g. thermal conductivity is much greater between air/water than air/air), the cores are much smaller, and the pressure drop across the core is minimal compared to air/air.

The 7th injector goes in front of the throttle body. I also like the 7th injector because of its simplicity and cost. Sure I can swap out all 6 injectors, fuel pump, and get an ecu reflash, or use a piggy back to tune it, but its less expensive to just put a 7th injector. Off boost the car will drive like stock this way also, and a sub injector works great at low boost levels (which is what this car is going with anyways).Plus those OEM injectors paired up with one 80lb injector is a good amount of fuel supply for the power level.

 

Do you think i am your mom or something.... you need people to be constructive with you join a support group!!!


So you do not plan to reflash the ECU or use a piggy back system? Your also keeping a stock OEM fuel pump for 400whp??

I just read that you sell a Tiboron kit not a G35 kit my mistake

Where are you going to put a air to water IC there is minimal room under the hood of the car

Ok so you didn't ask who to wire in a scavenge pump you asked where to put it you actually seem unsure about the whole return pump idea?? Really you can design a turbo kit but can't figure out where to place and oil scavenge pump.

 

Wow, this is good stuff here. Like Gord said, have you ever looked under the hood of a Z/G? Turbo lag???? Do you relize how fast a turbo will fill an air to air intercooler? Water to air intercoolers are good for one run at the track with a good amount of ice, and that is all. After that heat soaking becomes a huge issue.

If you are looking at simplicity and cost, VQ is not for you.


Maybe I can sell him a complete package with a bracket and pre wired plug'n play harness:








$500 each, $480ea for an order of 10. Considering the pump alone is $350, I'd say it's a good deal



.

 

Well, in my very first post I said I'm using a perfect power smt-8t fuel controller........

I already have the water/air core, water reservoir, pump, and heat exchanger mounted in the car, hopefully soon I can get some pics up.

Oil can be returned to multiple places on the engine, I'm wanting to discuss a couple of options is all. This setup keeps the turbos too low, so I cannot go the normal rout of having the drain gravity feed into the pan. I'm also debating on weather or not to CAD an oil pan spacer for an oil return and using a scavenge pump to put oil return back into pan (nice bolt on option, and you don't have to drill/tap your current pan). I've also seen people run the return up to the valve covers. One question I had that no one seems to know is if oil has to run downward to the pump, or if the pump can be located above the turbos, and it will suck oil up to it? What I can't design a turbo systems because I'm curious of a rating on a pump? lol your kidding right?

Not really sure why your fishing for reasons to drop my credibility down? Kinda weird if you ask me considering the purpose of this forum/topic is to discuss G35's and forced induction..... anyways...

 

How I am I trying to discredit you by asking questions about how you are going to do things/make certain things work.....that is a discussion not "trying to discredit you".

 

There are a ton of reasons why a water to air turbo setup benefits air to air. We can debate it if you want....but thats not really the purpose of this..... but like I stated earlier I already posted the pros. Heat soak is never an issue if you have the system designed properly. Also, lots of super cars use them such as the Bugatti Veyron, did they use them for their 4 turbochargers so they can only do a 1/4 mile pass then have heat soak? I don't think so. The only con to a water to air system is the complexity and cost, thats it (assuming its set up properly, e.g. correct size reservoir, water flow rate, size of heat exchanger, and size of core). Otherwise it beats an air to air in other aspects. Plus its nice to have different stuff out there.

 

I like how you mounted the pump, looks nice and clean. It looks like your mounting it to the support bracket location that supports the dual exhausts?

 

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