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

thangcu35 · 12-27-2014, 06:26 PM

Quote:

Originally Posted by sandersd

Great job! Just curious, have you done a cost comparison vs buying a prefabbed kit? As a fellow DIYer I know nothing can compare to the satisfaction and attention to detail you get when doing it yourself, and you did an outstanding job, but would you do it again or just buy a kit?

Beautiful welds, btw. I'm jealous...

I MAY have considered going BP's single turbo setup but with Comp's oil-less turbo. I didn't want to drop the motor or transmission to install the turbos and relocate wires and hoses, and I can't imagine servicing them would be any easier. I think the only reason why I went with twin is because of better boost response and higher efficiency overall, plus I may have been the first 370z with the turbos where they are. Cost wise, it came out to be about the same as BP's kit (without uprev, clutch, exhaust etc). I used top of the line products and materials and with each turbo costing $1650 did not help the budget at all. If I had a car lift and a better workshop, I wouldn't mind create some pre turbo down-pipes for other DIY'ers out there trying to do their own turbo kits.

I used a temporary boost gauge up and found that my max boost is only 7.5-8psi. It sure pulls harder than I thought though. I'm going to adjust the wastegate actuator rod and bring it to 10psi. Dyno tuning is on my list of things to do before New Year (hint hint).

On a fun account, my friend with a built G35 using Greddy TT and Haltech EMS requested my help in retuning his car to run pump gas. I initially tuned it on E85 in October and it made a hefty 696whp @19psi. Today I tuned it for 11psi daily driving on pump 93 and we went for a little "spirited" drive. Not sure on numbers but it did put a smile on my face

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

nvgtr35 · 12-30-2014, 09:38 AM

This is exactly what I've been looking for if you could mass produce the down pipes would be great. If not i would pay you to make me a set.

Whats the modle number for the turbo your using please? thanks and great Job!

thangcu35 · 12-30-2014, 11:55 AM

They are comp CT2 4747 billet triple ball bearing. Just call the number on their main website to inquire. They have great customer service.

thangcu35 · 01-01-2015, 12:06 AM

Here it is dyno tuned. 472whp & 421ft-lb @9psi

The combination of cold weather and worn out Michelin PSS gave me a hard time with traction on the rollers. 4th gear would not hook. I ended up having 2 of the guys sit on the trunk to give it traction.

My impression on the result is exactly how I intended for the kit to deliver. Instant throttle response, high mid range torque with a feasible powerband. The .64 AR housings are showing their limitation as torque is ramping down on top end, and they are not meant to make peak power. I did wanted to increase boost a bit and hit 500whp but I did not have any boost controller setup. Overall the graph is smooth and shows no sign of hiccup.

phunk · 01-01-2015, 05:10 PM

great work and follow-through!

thangcu35 · 01-02-2015, 08:01 PM

How I fixed no traction issue https://drive.google.com/file/d/0BzZ...lKSjM5ZkE/view

hurahn · 01-02-2015, 09:27 PM

Quote:

Originally Posted by thangcu35

How I fixed no traction issue https://drive.google.com/file/d/0BzZ...lKSjM5ZkE/view

Your MR2 is ridiculous. That must be a hoot to drive.

thangcu35 · 01-03-2015, 02:33 PM

Quote:

Originally Posted by hurahn

Your MR2 is ridiculous. That must be a hoot to drive.

Yes it was. It made 430whp and walked an E85 GTR that ran 10.7 @132mph. I sold it though. I chose to keep the Z since it's a more enjoyable street car.

Boost_lee · 01-02-2015, 09:27 PM

Sounds great!

G37Sam · 01-03-2015, 12:40 AM

Awesome work!

thangcu35 · 01-10-2015, 08:11 PM

Installed Apexi AVC-R boost controller. My plan: boost by gear to maximize traction in all gear, or at least get it close enough to allow traction control to actually work. Boost by RPM function will fix boost fall out problem at top end. Mounted the controller using a vent phone holder. The controller goes into the glove box when I need it out of the way.

YzGyz · 01-10-2015, 08:45 PM

hết xảy anh hai. That la het xay

Thangbom aka YzGyz

thangcu35 · 01-10-2015, 09:10 PM

Quote:

Originally Posted by YzGyz

hết xảy anh hai. That la het xay

Thangbom aka YzGyz

Hello dai ca

thangcu35 · 01-12-2015, 10:45 PM

I had the chance to re-tune the flex fuel sensor of my friend's built G35 Greddy TT kit on E85 and E10 (pump 93). I love working with Haltech EMS, much more user friendly than other standalone EMS I've played with. The car is honestly a beast. These VQs can really put down some power given the right setup. I'm planning on running E85 this summer, utilizing a flex fuel sensor and ethanol content gauge. The 5 switchable maps with uprev will be tuned accordingly to the ethanol content. It's going to be a manual input flex fuel setup. Here's a dynograph from the G35's tuning session.

jwick · 01-12-2015, 11:31 PM

Quote:

Originally Posted by thangcu35

I had the chance to re-tune the flex fuel sensor of my friend's built G35 Greddy TT kit on E85 and E10 (pump 93). I love working with Haltech EMS, much more user friendly than other standalone EMS I've played with. The car is honestly a beast. These VQs can really put down some power given the right setup. I'm planning on running E85 this summer, utilizing a flex fuel sensor and ethanol content gauge. The 5 switchable maps with uprev will be tuned accordingly to the ethanol content. It's going to be a manual input flex fuel setup. Here's a dynograph from the G35's tuning session.

That's ridiculous

12-30-2014, 09:38 AM	#2 (permalink)
nvgtr35 Base Member Join Date: Nov 2014 Location: piscataway nj Posts: 9 Drives: 13 370z Rep Power: 12	build This is exactly what I've been looking for if you could mass produce the down pipes would be great. If not i would pay you to make me a set. Whats the modle number for the turbo your using please? thanks and great Job!

01-01-2015, 12:06 AM	#4 (permalink)
thangcu35 Base Member Join Date: Mar 2014 Location: Fayetteville, NC Posts: 97 Drives: '12 Sport/Tour/Nav Rep Power: 17	Here it is dyno tuned. 472whp & 421ft-lb @9psi The combination of cold weather and worn out Michelin PSS gave me a hard time with traction on the rollers. 4th gear would not hook. I ended up having 2 of the guys sit on the trunk to give it traction. My impression on the result is exactly how I intended for the kit to deliver. Instant throttle response, high mid range torque with a feasible powerband. The .64 AR housings are showing their limitation as torque is ramping down on top end, and they are not meant to make peak power. I did wanted to increase boost a bit and hit 500whp but I did not have any boost controller setup. Overall the graph is smooth and shows no sign of hiccup. G37Sam, Boost_lee, phunk and 8 others like this.

01-01-2015, 05:10 PM	#5 (permalink)
phunk A True Z Fanatic Join Date: Mar 2009 Location: Chicago Posts: 3,669 Drives: 370 Rep Power: 974725	great work and follow-through! __________________ Charles @ CJ Motorsports : Website \| Facebook \| Instagram \| YouTube Home of the 9 second, stock longblock, stock drivetrain 6MT 370z. 9.91 @ 142mph

01-02-2015, 08:01 PM	#6 (permalink)
thangcu35 Base Member Join Date: Mar 2014 Location: Fayetteville, NC Posts: 97 Drives: '12 Sport/Tour/Nav Rep Power: 17	How I fixed no traction issue https://drive.google.com/file/d/0BzZ...lKSjM5ZkE/view Boost_lee likes this.

01-02-2015, 09:27 PM	#9 (permalink)
Boost_lee A True Z Fanatic Join Date: Feb 2009 Location: SATX Posts: 2,813 Drives: 09 370Z TT 6MT Rep Power: 31	Sounds great! __________________ My TT Z

12-30-2014, 11:55 AM	#3 (permalink)
thangcu35 Base Member Join Date: Mar 2014 Location: Fayetteville, NC Posts: 97 Drives: '12 Sport/Tour/Nav Rep Power: 17	They are comp CT2 4747 billet triple ball bearing. Just call the number on their main website to inquire. They have great customer service.

01-03-2015, 12:40 AM	#10 (permalink)
G37Sam A True Z Fanatic Join Date: Dec 2008 Location: Dubai, UAE Posts: 1,507 Drives: RB'd G37 Rep Power: 22	Awesome work! __________________ '14 Viper GTS '08 RB'd G37S - Sold

01-10-2015, 08:11 PM	#11 (permalink)
thangcu35 Base Member Join Date: Mar 2014 Location: Fayetteville, NC Posts: 97 Drives: '12 Sport/Tour/Nav Rep Power: 17	Installed Apexi AVC-R boost controller. My plan: boost by gear to maximize traction in all gear, or at least get it close enough to allow traction control to actually work. Boost by RPM function will fix boost fall out problem at top end. Mounted the controller using a vent phone holder. The controller goes into the glove box when I need it out of the way. Last edited by thangcu35; 01-10-2015 at 09:18 PM.

01-10-2015, 08:45 PM	#12 (permalink)
YzGyz A True Z Fanatic Join Date: Jun 2013 Location: Houston Posts: 1,449 Drives: 2010 Nismo Rep Power: 65	hết xảy anh hai. That la het xay Thangbom aka YzGyz

01-12-2015, 10:45 PM	#14 (permalink)
thangcu35 Base Member Join Date: Mar 2014 Location: Fayetteville, NC Posts: 97 Drives: '12 Sport/Tour/Nav Rep Power: 17	I had the chance to re-tune the flex fuel sensor of my friend's built G35 Greddy TT kit on E85 and E10 (pump 93). I love working with Haltech EMS, much more user friendly than other standalone EMS I've played with. The car is honestly a beast. These VQs can really put down some power given the right setup. I'm planning on running E85 this summer, utilizing a flex fuel sensor and ethanol content gauge. The 5 switchable maps with uprev will be tuned accordingly to the ethanol content. It's going to be a manual input flex fuel setup. Here's a dynograph from the G35's tuning session. vividracing, jwick, GaleForce and 2 others like this.

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