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

thangcu35 · 12-15-2014, 07:16 PM

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

Chuck33079 · 12-16-2014, 08:14 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?

thangcu35 · 12-16-2014, 02:51 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 · 12-25-2014, 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

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.

CDepp · 12-16-2014, 02:45 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, 02:54 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

12-15-2014, 07:16 PM	#1 (permalink)
thangcu35 Base Member Join Date: Mar 2014 Location: Fayetteville, NC Posts: 97 Drives: '12 Sport/Tour/Nav Rep Power: 17	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 gbrettin, CDepp, Mbreese and 1 others like this. Last edited by thangcu35; 12-15-2014 at 07:35 PM.

12-25-2014, 04:22 PM	#4 (permalink)
thangcu35 Base Member Join Date: Mar 2014 Location: Fayetteville, NC Posts: 97 Drives: '12 Sport/Tour/Nav Rep Power: 17	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.

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