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Nissan 370Z Forum (http://www.the370z.com/)
-   Forced Induction (http://www.the370z.com/forced-induction/)
-   -   Another DIY Twin Turbo kit (COMP oil-less turbos) (http://www.the370z.com/forced-induction/98318-another-diy-twin-turbo-kit-comp-oil-less-turbos.html)

Chuck33079 12-16-2014 08:14 AM
Quote:
Originally Posted by thangcu35 (Post 3057453)
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 02:33 PM
love DIY mods! well done!

CDepp 12-16-2014 02:45 PM
Quote:
Originally Posted by thangcu35 (Post 3057453)
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...

:gtfo2::rofl2:

thangcu35 12-16-2014 02:51 PM
Quote:
Originally Posted by Chuck33079 (Post 3057823)
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 02:54 PM
Quote:
Originally Posted by CDepp (Post 3058229)
Can build a nice turbo setup, can only film vertical...

:gtfo2::rofl2:
:owned:

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

thangcu35 12-25-2014 04:22 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

https://lh6.googleusercontent.com/Av...=w1096-h822-no

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.

https://lh3.googleusercontent.com/-q...o/IMG_0635.JPG

https://lh3.googleusercontent.com/Pc...=w1096-h822-no

phunk 12-25-2014 07:12 PM
Thats some mighty fine work youre doing there!

jwick 12-25-2014 08:31 PM
I don't get any sound on the clip

jwick 12-25-2014 08:32 PM
Why aren't you running an undershroud?

ATLz 12-25-2014 09:23 PM
Great job on the build...

thangcu35 12-25-2014 09:41 PM
Quote:
Originally Posted by jwick (Post 3065559)
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 10:26 PM
Great job on the build!!! very inspiring to all of us DIY people out here

jwick 12-25-2014 10:37 PM
Quote:
Originally Posted by thangcu35 (Post 3065613)
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 10:38 PM
BTW beautiful build :tup:

Rob298mx 12-25-2014 10:48 PM
Car sounds sick!


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