Another DIY Twin Turbo kit (COMP oil-less turbos)

thangcu35

Hi, I'm relatively a new member here. I bought my 2012 Sport/Tour/Nav 370z back in May 2014 and I've pulled the trigger to make my own twin turbo kit. I've been building engines/turbo kits for a couple of cars that I've owned in the past. I'm also a seasonal tuner that have experience with AEM EMS, Haltech, Power FC, Megasquirt and now most recently Uprev. What inspired me to make my own instead of purchasing a kit for the Z is due to a few reasons. First, I do not wish to remove my engine to install/remove the turbos. I will make an extention to the OEM manifolds and mount the turbos in OEM cats location. The 2nd reason is that I want to retain the factory crash bar. I'm aware that GTM is among the few company that offers a kit to retain the factory crash bar, however their reputation has been FUBAR. The 3rd reason is that I can TIG weld (amateur level) and I enjoy working on my own car.

Here is the project car with 2014 Nismo converted theme.



Some of the parts I have collected. Thanks BBRspeedworks for the custom SS 3 bolt flanges.



After careful consideration, I've decided to use COMP oil-less turbos (equilvalent to GTX2863r) 430bhp. This is my first time using these oil-less turbos, but I've only seen good results from them. The cartridge is internally lubricated with a special type of grease and require no source of oil. This allows me to mount the turbo at any level and any where that I can squeeze it in. It is water cooled (mandatory), and has a grease fitting that can be use to re-grease every 3000-5000 miles (oil change intervals).




They machine Garrett turbine housing to fit their turbine wheels.




Grease fitting to be use with any grease gun.







My goal for this build is 500-550whp daily driveable on pump gas, full boost before 3.3k rpm, and fun instant response. The turbos will be easily serviceable, and routing will work with any cat back exhaust.

The rundown:

- Stock VQ37
- Uprev tuner
- Comp oil-less billet turbos, .64AR turbine, compressor rated for 430hp.
- Treadstone's high density IC cores 12.5"x6"x3.5" support up to 500hp each.
- All stainless construction, 11g thick tubing.
- Internal wastegates set at 10psi (save space and cost vs external)
- 2" pre IC piping, 2.75" post IC piping, high rise MAF adapter
- Synchronic R35V BOV
- 850cc Bosch EV14 PnP injectors
- Aeromotive 340lph fuel pump + CJM install kit, stock returnless

Currently my car drives on Zspeed CSC, Southbend flywheel, Exedy pressure plate, and ACT 6 pucks. Yes, this is a very complicated clutch setup, but I want the most reliable/softest performance pressure plate for driving comfort. The pedal feels almost stock like but it grips like a mad mother. This has to be my favorite combination in any car I've driven.

Once I'm done welding up the IC cores, I can work on mounting the turbos. I managed to get uprev running great on 850cc injectors, but a full retune is in order once I upgrade to 2.75" MAF piping along with the bigger fuel pump. Stay tuned.