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

Chuck33079 · 12-16-2014, 09:14 AM

Quote:

Originally Posted by thangcu35

Turbos initially are sooooo laggy, cant even hear blow off valves go off. Then after a couple of pulls to soften up the grease in the center housing, it became so much better in response and noise!

Is that how those are supposed to be, or do they just need miles to break in?

Cbtech · 12-16-2014, 03:33 PM

love DIY mods! well done!

CDepp · 12-16-2014, 03:45 PM

Quote:

Originally Posted by thangcu35

1st and 2nd gear ~ 70% throttle with traction control on. Running off wastegate pressure around 9-10 psi (dont have gauge to verify). Timing is fairly conservative at 17. Got air fuel to be around 11.5-12 still rough but I only spent an hour to street tune it. Turbos initially are sooooo laggy, cant even hear blow off valves go off. Then after a couple of pulls to soften up the grease in the center housing, it became so much better in response and noise! Im guessing full boost is before 3.5k right now in 4th gear, but it will get better once I break it in further. It will go sideways with half throttle in 2nd if traction control is off. Just insane.

http://youtube.com/watch?v=bi1NHBzcx...e_gdata_player

Can build a nice turbo setup, can only film vertical...

thangcu35 · 12-16-2014, 03:51 PM

Quote:

Originally Posted by Chuck33079

Is that how those are supposed to be, or do they just need miles to break in?

The turbos were tightly packed with grease from Comp. I could barely spin the shaft with hand when it was off the car. However after about 100 miles or so the grease will spread out and the shaft will spin effortless. I have seen a video documenting at 100 miles the turbo continues to spin for 10 seconds after shut off, and after 500 miles it spun for 25s. I will have to do a quick regrease every 4000-5000 miles or so. Their special high speed grease is expensive as hell though.

thangcu35 · 12-16-2014, 03:54 PM

Quote:

Originally Posted by CDepp

Can build a nice turbo setup, can only film vertical...

Iphone 6 is slim as hell its hard to hold it around the edges

thangcu35 · 12-25-2014, 05:22 PM

Rewelded the Y pipe. Transition is much smoother and welds are fairly decent looking. Also deleted resonators.

Here's a sound clip I recorded. I had to hear how it sounds from the outside.

https://www.youtube.com/watch?v=BSjq...ature=youtu.be

I had some spare aluminum bars laying around so I added two braces for the front bumper since I'm not running any undertray. This added significant rigidity to the bumper.

phunk · 12-25-2014, 08:12 PM

Thats some mighty fine work youre doing there!

jwick · 12-25-2014, 09:31 PM

I don't get any sound on the clip

jwick · 12-25-2014, 09:32 PM

Why aren't you running an undershroud?

ATLz · 12-25-2014, 10:23 PM

Great job on the build...

thangcu35 · 12-25-2014, 10:41 PM

Quote:

Originally Posted by jwick

Why aren't you running an undershroud?

Did Nismo conversion but didn't get the undertray. I actually removed the base oem undertray on my first oil change. Thought it was ridiculous on how many bolts and pins I had to remove to get to the drain plug. I know Z1 has a nice aluminum alternative but I'm not convinced to put one on yet. It's been 9k miles and I haven't notice any negative effect. Does the youtube link not work for you?

Mbreese · 12-25-2014, 11:26 PM

Great job on the build!!! very inspiring to all of us DIY people out here

jwick · 12-25-2014, 11:37 PM

Quote:

Originally Posted by thangcu35

Did Nismo conversion but didn't get the undertray. I actually removed the base oem undertray on my first oil change. Thought it was ridiculous on how many bolts and pins I had to remove to get to the drain plug. I know Z1 has a nice aluminum alternative but I'm not convinced to put one on yet. It's been 9k miles and I haven't notice any negative effect. Does the youtube link not work for you?

I just clicked the in post video and it didn't have any sounds

I'm running the ZSpeed undershroud and love it

jwick · 12-25-2014, 11:38 PM

BTW beautiful build

Rob298mx · 12-25-2014, 11:48 PM

Car sounds sick!

12-16-2014, 03:33 PM	#77 (permalink)
Cbtech A True Z Fanatic Join Date: Feb 2013 Location: Sacramento, CA Posts: 1,372 Drives: 40th Anniversary Rep Power: 15	love DIY mods! well done! __________________ Are U in Sacramento or Central Valley California? Click here! Foglight Hardwire in less than 10 minutes! DIY: Automatic VDC off

12-25-2014, 05:22 PM	#81 (permalink)
thangcu35 Base Member Join Date: Mar 2014 Location: Fayetteville, NC Posts: 97 Drives: '12 Sport/Tour/Nav Rep Power: 15	Rewelded the Y pipe. Transition is much smoother and welds are fairly decent looking. Also deleted resonators. Here's a sound clip I recorded. I had to hear how it sounds from the outside. https://www.youtube.com/watch?v=BSjq...ature=youtu.be I had some spare aluminum bars laying around so I added two braces for the front bumper since I'm not running any undertray. This added significant rigidity to the bumper. Nixlimited and gbrettin like this.

12-25-2014, 08:12 PM	#82 (permalink)
phunk A True Z Fanatic Join Date: Mar 2009 Location: Chicago Posts: 3,668 Drives: 370 Rep Power: 974723	Thats some mighty fine work youre doing there! __________________ Charles @ CJ Motorsports : Website \| Facebook \| Instagram \| YouTube Home of the 9 second, stock longblock, stock drivetrain 6MT 370z. 9.91 @ 142mph

12-25-2014, 09:31 PM	#83 (permalink)
jwick A True Z Fanatic Join Date: Dec 2010 Location: Houston Posts: 14,532 Drives: '10 G37 6MT Rep Power: 2465056	I don't get any sound on the clip __________________ '10 G37T 6MT Graphite/Graphite - BP - G37T Build

12-25-2014, 09:32 PM	#84 (permalink)
jwick A True Z Fanatic Join Date: Dec 2010 Location: Houston Posts: 14,532 Drives: '10 G37 6MT Rep Power: 2465056	Why aren't you running an undershroud? __________________ '10 G37T 6MT Graphite/Graphite - BP - G37T Build

12-25-2014, 10:23 PM	#85 (permalink)
ATLz Banned Join Date: Nov 2014 Location: atl Posts: 19 Drives: 370z Rep Power: 0	Great job on the build...

12-25-2014, 11:26 PM	#87 (permalink)
Mbreese Enthusiast Member Join Date: Dec 2012 Location: Cartersville,Ga Posts: 331 Drives: Metalic-Gray,09 370Z Rep Power: 31	Great job on the build!!! very inspiring to all of us DIY people out here

12-25-2014, 11:38 PM	#89 (permalink)
jwick A True Z Fanatic Join Date: Dec 2010 Location: Houston Posts: 14,532 Drives: '10 G37 6MT Rep Power: 2465056	BTW beautiful build __________________ '10 G37T 6MT Graphite/Graphite - BP - G37T Build

12-25-2014, 11:48 PM	#90 (permalink)
Rob298mx Base Member Join Date: Aug 2014 Location: NH Posts: 91 Drives: 2010 Nissan 370z Rep Power: 11	Car sounds sick! thangcu35 likes this. __________________ 2010 Nissan 370z F.I. TT

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
[FOR SALE] Twin GT35 .63 A/R turbos $800 shipped	Vq'd240z	Parts for sale (Private Classifieds)	6	04-15-2014 05:42 PM
GTM Performance Engineering: Stage 2 Twin Turbo V2 w/GTX Turbos - CARB app submitted	SAM@GTM	Forced Induction	85	02-04-2014 02:30 AM
GTM MHI Twin Turbo vs. Fast Intentions Twin Turbo	isayimandrew	Forced Induction	26	05-29-2013 09:47 PM
FS: 2007 G35S Sedan, Prem, Nav, Tech Packages – GTM Installed and Tuned Twin Turbos	terrycs	Other Vehicle For sale	1	04-09-2013 07:25 PM
GTM Motorsports Twin Turbo vs Greddy Twin Turbo Kit	Nismo221	Forced Induction	57	08-16-2011 05:44 PM