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| Z Chassis Technical discussion related to the Z Chassis such as the S30, S310, Z31, Z32, Z33 and Z34. |
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01-26-2012, 07:38 PM
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#1 |
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Leaky Injector
 
Join Date: Dec 2010
Location: Portland
Age: 37
Posts: 124
Trader Rating: (0)
 Feedback Score: 0 reviews
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DOC Race 350Z turbo kit in the making!!
Hey there guys, I'm working on a single turbo kit for my 350Z and wanted to show some progress. I wanted to build a kit that was simple yet effective making it user friendly and can be installed with just regular tools. You will see that the kit was built and installed on jack stands, no pulling motor needed. I did tons of research before even attempting to design and have came up with a kit that fits my needs perfectly. Here are a few key points I wanted to incorporate when building the kit.
- Must use T4 flange - Capable of making 450whp with base turbo kit - Upgradable to twin turbo - Keep heat to a minimal (deathly afraid of engine fires) - Simplify kit without sacraficing quality and function Talking to techs at Horsepower Freaks and Precision Turbo, they suggested using a PT6766 CEA. It is a 935hp capable turbo that uses similar size housings as GT35R. I wanted to make sure the kit can make 450hp and still have room to play so the 6766 should be plenty for now. It's a small turbo that packs a big punch. After seeing some of the front mounted turbo setups, I chose to go towards rear due to my fear of engine fire. I have seen turbos and piping get red hot on dyno pulls. It scares the hell out of me to think of something that creates that much heat stuffed into such a tight area. Off to some pics. The main piece connects the left bank header to the turbo, we'll call this the turbo elbow. It also has a v band to connect the right bank exhaust. I wanted to make sure exhaust flow was not compromised so I did my best to make a T4 exhaust housing work. Turbo placement is not final but it gives me a good starting point. So far I've been daily driving with this exhaust housing on for 3 weeks with absolutely no scratches. I am lowered 1.75" btw. |
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01-26-2012, 07:39 PM
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#2 |
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Leaky Injector
Join Date: Dec 2010
Location: Portland
Age: 37
Posts: 124
Trader Rating: (0)
Feedback Score: 0 reviews
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Here are some shots of the downpipe. I figured I would build it with check engine light eliminators in case I wanted to mess with them down the road.
Some shots of the turbo elbow installed with the downpipe. As you can see I capped off the wg and turbo cartridge because this is my daily driver and I have to keep it on the road as I build the kit. With the wastegate so close to the downpipe, it makes doing a dumptube or recirc simple and out of the way. After the elbow and downpipe were done I started on the crossover pipe. I wanted to make sure it flowed enough to make some power so I used 2.25" stainless tubing. Paying close attention to available room and performance, we reworked the wiring harness to give extra room. This made it possible for a crossover pipe with no extra bends or kinks and it won't melt your wire harness. |
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01-26-2012, 07:40 PM
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#3 |
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Leaky Injector
Join Date: Dec 2010
Location: Portland
Age: 37
Posts: 124
Trader Rating: (0)
Feedback Score: 0 reviews
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Some pics of the pipe installed
And one showing the path it takes to get to the other side. Should be able to make some good power with different headers installed |
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02-01-2012, 02:39 PM
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#7 |
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Leaky Injector
Join Date: Dec 2010
Location: Portland
Age: 37
Posts: 124
Trader Rating: (0)
Feedback Score: 0 reviews
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Started building the intercooler for the 350Z turbokit. We're using a vertical flow core
This core will still support up to 800hp We made our own brackets for the intercooler to mirror the factory bumper support for strength and a factory fit. Some minor changes were made to allow the PS cooler, horn and airbag sensor to still fit factory. We designed a relocation bracket for the cooler and also modified a few other components to work (more details are logged @ D.O.C. Race | The Opportunity to Perform I'll have some more update pictures this evening. We also started designing the DOC VQ Intake Manifold to complement the newly found boost.... Last edited by T.O.D.; 02-01-2012 at 10:13 PM.. Reason: Added picture |
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02-09-2012, 12:41 AM
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#10 |
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Leaky Injector
Join Date: Dec 2010
Location: Portland
Age: 37
Posts: 124
Trader Rating: (0)
Feedback Score: 0 reviews
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The entire turbokit build and more is here DOC 350Z and is continuing to move along well.
Since then we mounted the oil scavenge pump and actually slipped the turbo cartridge on so everything is lubricating and functioning correctly. Next will be the upper intercooler inlet pipe and installing the blow-off valve... |
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02-10-2012, 10:33 PM
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#11 |
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Post Whore!
 
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Some clever ideas. I hope it pans out and is inexpensive. There is a lot on the market anymore in the $4,000 - $6,000 range.
Also, if you really are targeting the "cheap" crowed, IIRC 400whp is the recommended max for a stock VQ motor. That would be more than enough to bring the car to life considering a stocker is in the 240whp range. Good luck - keep us updated. |
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02-14-2012, 08:16 PM
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#13 |
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Leaky Injector
Join Date: Dec 2010
Location: Portland
Age: 37
Posts: 124
Trader Rating: (0)
Feedback Score: 0 reviews
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Been keeping busy on the Z kit, got the upper intercooler pipe finished and added the blow-off valve flange. Everything is plumbed in boosting 4lbs on wastegate spring, next will be the fuel surge tank, some custom fuel rails and dyno tuning!
DOC Race Turbo Z Last edited by T.O.D.; 03-02-2012 at 08:52 PM.. |
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03-02-2012, 07:24 PM
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#14 |
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Leaky Injector
Join Date: Dec 2010
Location: Portland
Age: 37
Posts: 124
Trader Rating: (0)
Feedback Score: 0 reviews
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Ordered up the ECU for the Z, should be here in about a week.
In the meantime, we started to build the VQ35DE Headers. These are going to be an upgrade to our Turbokit, but will have plenty of benefits for guys staying NA... |
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03-06-2012, 07:25 AM
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#17 | ||
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Zilvia Junkie
 
Join Date: Jan 2011
Location: Mililani, Hawaii
Age: 38
Posts: 459
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where's the HR love?
__________________
#0191 "Lin'da" 2AMR>  2AMR>Quote:
Quote:
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03-19-2012, 04:05 PM
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#22 |
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Leaky Injector
Join Date: Dec 2010
Location: Portland
Age: 37
Posts: 124
Trader Rating: (0)
Feedback Score: 0 reviews
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Were starting to work on the fuel system now, we did some tuning at 4psi with the factory system. We took a little video of the low boost stuff i'll put that up this week
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04-11-2012, 01:10 AM
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#28 |
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Leaky Injector
Join Date: Dec 2010
Location: Portland
Age: 37
Posts: 124
Trader Rating: (0)
Feedback Score: 0 reviews
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Fuel system is still in development, but had a chance to get some full undertray shots of the kit layout..
Car has been scraping framerail ride height to road test all the components clearance Cross-over pipe is nice and heat cycled |
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