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

BalanBro · 12-10-2014, 11:31 PM

^ Exactly what I was thinking. A wastegate actuator skid plate...WASTEPLATE!

Luciano13 · 12-13-2014, 06:03 PM

couldn't the turbos get really hot if the plate/shield is blocking air flow passing on the turbos?

TopgunZ · 12-13-2014, 07:27 PM

On a top mount kit the turbo doesnt have any air blowing by it and its sitting in the hot engine bay.

Luciano13 · 12-13-2014, 07:36 PM

Quote:

Originally Posted by TopgunZ

On a top mount kit the turbo doesnt have any air blowing by it and its sitting in the hot engine bay.

Don't most sit under or in front of the engine, right behind the bumper?
Im only asking.... Usually systems are designed a certain way for most air flow possible....

GaleForce · 12-13-2014, 08:35 PM

Quote:

Originally Posted by Luciano13

Don't most sit under or in front of the engine, right behind the bumper?
Im only asking.... Usually systems are designed a certain way for most air flow possible....

Most twins for this platform (Z34) have the snails coming off the headers right next to the motor. *Think between the strut towers and the motor block.

*this is just an approximate area and not exact. It will give you a good idea where most twins are mounted.

TopgunZ · 12-14-2014, 02:55 PM

Quote:

Originally Posted by Luciano13

Don't most sit under or in front of the engine, right behind the bumper?
Im only asking.... Usually systems are designed a certain way for most air flow possible....

In mine it sat right there under the bov.

thangcu35 · 12-14-2014, 03:56 PM

Well boys, shes back down on the ground and I went for a quick spin off boost. Needless to say Im thrilled this project is coming close to be done. More pictures are on the way later.

TopgunZ · 12-14-2014, 04:26 PM

Damn! That was quick. Monday dyno then vids? :-)

thangcu35 · 12-15-2014, 05:02 AM

Top speed pro 1. I dont recommend this exhaust to anyone since fitment was shitty, the driver side tip sat 1.5" lower than the passenger. I had to reweld the hanger to get the height even on both sides.

Then my charge pipes were made.

I modified the Y pipe to fit the turbo discharge. However I made the mistake of welding one of the o2 bung at the wrong angle and ended up unable to install the sensor. I will plug up the bungs for now and weld another Y pipe down the road.

Question for uprev users: if i disable the catalyst o2 sensors so that the code doesnt trip the CEL, will I still be able to pass inspection? Wishful thinking but I want to eliminate the post cat sensors all together.

Cell · 12-15-2014, 01:19 PM

For emissions, it depends what state and county you are in. Here in Chicago, I would fail emissions with the O2 sensors turned off. I would have to turn them on and drive it till it is OBDII ready. Right when it is ready is when there is a small window of opportunity to pass.

thangcu35 · 12-15-2014, 08:16 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

LNATKFRNG · 12-15-2014, 08:41 PM

Good looking work man! Any dyno/tuning plans?

firulice · 12-15-2014, 08:54 PM

Sick

thangcu35 · 12-15-2014, 09:36 PM

Quote:

Originally Posted by LNATKFRNG

Good looking work man! Any dyno/tuning plans?

I will have to wait until I get the oil cooler installed. I cant do repeated pulls especially when the car isnt moving on the dyno. I still need to add bracings for the turbos and make a skid plate. On top of that, I will have to reweld my Y pipe. My budget isnt exactly unlimited, so things will tend to be slowed down from here on.

Masterbeatty · 12-16-2014, 09:11 AM

Damn your back must be killing you now. Good job dude, im sure you will need rear tires here pretty soon.

12-10-2014, 11:31 PM	#61 (permalink)
BalanBro Enthusiast Member Join Date: Apr 2009 Location: NJ Posts: 318 Drives: 40th Anniv. 370Z Rep Power: 1111	^ Exactly what I was thinking. A wastegate actuator skid plate...WASTEPLATE! TopgunZ likes this. __________________ 2012 Mercedes C63 AMG P31 Sedan, ROW, aFe, Eurocharged Dyno Tune. 438WHP/415WTQ 2010 SOLD: 40th Anniversary 370z

12-13-2014, 06:03 PM	#62 (permalink)
Luciano13 A True Z Fanatic Join Date: Mar 2013 Location: Canada Posts: 2,130 Drives: 2016 Solid Redz Rep Power: 245	couldn't the turbos get really hot if the plate/shield is blocking air flow passing on the turbos? __________________ http://www.the370z.com/members-370z-...lid-red-z.html

12-13-2014, 07:27 PM	#63 (permalink)
TopgunZ A True Z Fanatic Join Date: Jun 2012 Location: Minneapolis Posts: 2,651 Drives: 06 350Z , 09 370Z MT Rep Power: 6834	On a top mount kit the turbo doesnt have any air blowing by it and its sitting in the hot engine bay. __________________ ROTREX SUPERCHARGER TUNER KITS - $6799/ CUSTOM STILLEN AIR TO AIR KITS -$2100/ 700+ WHP!! WWW.TOPGUNSPEEDWORKS.COM

12-14-2014, 03:56 PM	#67 (permalink)
thangcu35 Base Member Join Date: Mar 2014 Location: Fayetteville, NC Posts: 97 Drives: '12 Sport/Tour/Nav Rep Power: 15	Well boys, shes back down on the ground and I went for a quick spin off boost. Needless to say Im thrilled this project is coming close to be done. More pictures are on the way later. GaleForce and ATLz like this.

12-14-2014, 04:26 PM	#68 (permalink)
TopgunZ A True Z Fanatic Join Date: Jun 2012 Location: Minneapolis Posts: 2,651 Drives: 06 350Z , 09 370Z MT Rep Power: 6834	Damn! That was quick. Monday dyno then vids? :-) __________________ ROTREX SUPERCHARGER TUNER KITS - $6799/ CUSTOM STILLEN AIR TO AIR KITS -$2100/ 700+ WHP!! WWW.TOPGUNSPEEDWORKS.COM

12-15-2014, 05:02 AM	#69 (permalink)
thangcu35 Base Member Join Date: Mar 2014 Location: Fayetteville, NC Posts: 97 Drives: '12 Sport/Tour/Nav Rep Power: 15	Top speed pro 1. I dont recommend this exhaust to anyone since fitment was shitty, the driver side tip sat 1.5" lower than the passenger. I had to reweld the hanger to get the height even on both sides. Then my charge pipes were made. I modified the Y pipe to fit the turbo discharge. However I made the mistake of welding one of the o2 bung at the wrong angle and ended up unable to install the sensor. I will plug up the bungs for now and weld another Y pipe down the road. Question for uprev users: if i disable the catalyst o2 sensors so that the code doesnt trip the CEL, will I still be able to pass inspection? Wishful thinking but I want to eliminate the post cat sensors all together. jwick likes this.

12-15-2014, 01:19 PM	#70 (permalink)
Cell A True Z Fanatic Join Date: Jan 2010 Location: Chicago Posts: 1,449 Drives: A Garbage Truck Rep Power: 21	For emissions, it depends what state and county you are in. Here in Chicago, I would fail emissions with the O2 sensors turned off. I would have to turn them on and drive it till it is OBDII ready. Right when it is ready is when there is a small window of opportunity to pass.

12-15-2014, 08:16 PM	#71 (permalink)
thangcu35 Base Member Join Date: Mar 2014 Location: Fayetteville, NC Posts: 97 Drives: '12 Sport/Tour/Nav Rep Power: 15	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 08:35 PM.

12-15-2014, 08:41 PM	#72 (permalink)
LNATKFRNG Base Member Join Date: Jun 2013 Location: Ocala Posts: 158 Drives: 370z pearl white Rep Power: 12	Good looking work man! Any dyno/tuning plans? __________________ '09 sport package

12-15-2014, 08:54 PM	#73 (permalink)
firulice Enthusiast Member Join Date: Nov 2014 Location: utah Posts: 277 Drives: 40th Rep Power: 1105	Sick

12-16-2014, 09:11 AM	#75 (permalink)
Masterbeatty A True Z Fanatic Join Date: May 2012 Location: Whales Vagina Posts: 4,586 Drives: the speed limit... Rep Power: 122867	Damn your back must be killing you now. Good job dude, im sure you will need rear tires here pretty soon. __________________ 2011 MB 6MT Masterbeatty journal

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