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

Boosted Performance · 11-19-2014, 09:22 AM

Looking forward to this build...I think I know exactly how this will be plumbed (I have done the same on a VQ35DE a long time ago).

The only thing I would do differently is the selection of the turbine housings. You will find that the .64 T25's have a very low flow limit. They will be efficient (EBP less than 2:1) up to 500whp, but after that they will become a bit of a restriction.

I also talked to the guys at COMP at SEMA a couple of weeks ago about the greasing of these turbos. And like Rusty, I had the same questions, where does the grease go. I thought that 3-4 pumps of grease is actually a lot for such a small centre section. If I was to guess, I would have thought 1-2 pump worth of grease per oil change would have been sufficient.

Nixlimited · 11-19-2014, 05:35 PM

Look forward to seeing results of another homebrew kit.

vividracing · 11-19-2014, 05:42 PM

Quote:

Originally Posted by thangcu35

this is my 2nd time welding aluminum but I made sure the welds are leak proof.

They look pretty good to me for only being your second time. Nice job

thangcu35 · 11-19-2014, 06:29 PM

Thanks! I'm working on a steady hand for more consistent beads.

Nothing too crazy today, got some time to test fit the intercooler and plumbing. I'm going to bring out the front crash bar by 1/4" using aluminum spacers to give the IC some more room to play with. Currently the 3.5" core barely fits in between the crash bar and radiator support. I'm thinking of mounting the IC with the bolt holes circled in red. It's too bad that I have to do my work outside since the one car garage is currently occupied by the welder and tools. Winter is going to kick my *** real soon.

I'm still thinking of where to relocate the powersteering cooler to.

thangcu35 · 11-22-2014, 12:24 PM

It's a good day out so I've gotten more progress. Figured out how to relocate the OEM powersteering cooler without making any major mod. I simply switched the OEM brackets around and that allows me to place the cooler inside toward the AC condenser out of the way of the IC. Extended the lines with 3/8 hose and refilled powersteering with DEX VII ATF.

I also got the IC brackets welded on.

Got all the post-IC pipings sorted out. Still need to weld on MAF adapter and BOV flange.

Test fit front bumper

Rusty · 11-22-2014, 01:12 PM

Where you putting the oil cooler at?

thangcu35 · 11-22-2014, 03:12 PM

If i decide on adding one, ill put it behind the right IC. Do i need one if the car is not going to be tracked?

Rusty · 11-22-2014, 03:26 PM

Yea you do. With the heat from the extra power, and where you live. A 34 row unit.

Luciano13 · 11-23-2014, 04:05 PM

Sub'D for everything!!!

TerribleONE · 11-23-2014, 04:14 PM

Oil cooler is a must!

swiss370Z · 11-24-2014, 12:18 PM

Quote:

Originally Posted by TerribleONE

Oil cooler is a must!

I'm only supercharged
But is "A MUST"

Luciano13 · 11-24-2014, 03:14 PM

jwick · 11-24-2014, 03:48 PM

I'll jump on the cooler bandwagon. I can spike oil temps 30deg just with a few good boosted pulls on the freeway. That's with an oil pan spacer and 30 row cooler. Temps max out around 210-215degC so no high heat issues but I can only imagine the temps I'd see without the cooler and 8.5qrts of oil cycling.

1slow370 · 11-24-2014, 04:07 PM

well he may have a slight difference in oil temps due to not having oil circulated through his turbos. but yeah the car still needs at least a small cooler.

Edit: Except mine I need to remove my cooler. Dry sump + 12.5qts

elperuano · 11-24-2014, 04:50 PM

^ what kinda kit you running?

11-19-2014, 09:22 AM	#16 (permalink)
Boosted Performance The370Z.com Sponsor Join Date: Feb 2010 Location: Edmonton, AB Posts: 1,629 Drives: Z's Rep Power: 3383	Looking forward to this build...I think I know exactly how this will be plumbed (I have done the same on a VQ35DE a long time ago). The only thing I would do differently is the selection of the turbine housings. You will find that the .64 T25's have a very low flow limit. They will be efficient (EBP less than 2:1) up to 500whp, but after that they will become a bit of a restriction. I also talked to the guys at COMP at SEMA a couple of weeks ago about the greasing of these turbos. And like Rusty, I had the same questions, where does the grease go. I thought that 3-4 pumps of grease is actually a lot for such a small centre section. If I was to guess, I would have thought 1-2 pump worth of grease per oil change would have been sufficient. __________________ 750WHP starting @ $7,500 to the door FOR DETAILS VISIT: http://www.the370z.com/members/boosted-performance.html FB: https://www.facebook.com/Boosted-Per...6303179791462/ IG @boostedperformanceyeg

11-19-2014, 05:35 PM	#17 (permalink)
Nixlimited A True Z Fanatic Join Date: Aug 2009 Location: San Diego Posts: 1,235 Drives: 15 GT-R / 11 Prius Rep Power: 26	Look forward to seeing results of another homebrew kit. __________________ Car Sold! Pleasure being a part of the Z community. New ride: 2015 GT-R - 647 WHP / 641 WTQ (e85) & 543 WHP / 519 WTQ (91)

11-19-2014, 06:29 PM	#19 (permalink)
thangcu35 Base Member Join Date: Mar 2014 Location: Fayetteville, NC Posts: 97 Drives: '12 Sport/Tour/Nav Rep Power: 16	Thanks! I'm working on a steady hand for more consistent beads. Nothing too crazy today, got some time to test fit the intercooler and plumbing. I'm going to bring out the front crash bar by 1/4" using aluminum spacers to give the IC some more room to play with. Currently the 3.5" core barely fits in between the crash bar and radiator support. I'm thinking of mounting the IC with the bolt holes circled in red. It's too bad that I have to do my work outside since the one car garage is currently occupied by the welder and tools. Winter is going to kick my *** real soon. I'm still thinking of where to relocate the powersteering cooler to. DIGItonium and BBRSpeedWorks like this.

11-22-2014, 12:24 PM	#20 (permalink)
thangcu35 Base Member Join Date: Mar 2014 Location: Fayetteville, NC Posts: 97 Drives: '12 Sport/Tour/Nav Rep Power: 16	It's a good day out so I've gotten more progress. Figured out how to relocate the OEM powersteering cooler without making any major mod. I simply switched the OEM brackets around and that allows me to place the cooler inside toward the AC condenser out of the way of the IC. Extended the lines with 3/8 hose and refilled powersteering with DEX VII ATF. I also got the IC brackets welded on. Got all the post-IC pipings sorted out. Still need to weld on MAF adapter and BOV flange. Test fit front bumper DIGItonium, cdoxp800 and Luciano13 like this.

11-22-2014, 01:12 PM	#21 (permalink)
Rusty Ronin Samurai - Assassin Join Date: Dec 2011 Location: Fayettenam,Pennsyltucky Age: 69 Posts: 35,489 Drives: 2011 Nismo GM 6M Rep Power: 2684438	Where you putting the oil cooler at? __________________ 浪人 - 殺し屋 "The Difficult Anytime, The Impossible By Appointment Only" http://www.the370z.com/members-370z-...o-journal.html

11-22-2014, 03:12 PM	#22 (permalink)
thangcu35 Base Member Join Date: Mar 2014 Location: Fayetteville, NC Posts: 97 Drives: '12 Sport/Tour/Nav Rep Power: 16	If i decide on adding one, ill put it behind the right IC. Do i need one if the car is not going to be tracked? Luciano13 likes this.

11-22-2014, 03:26 PM	#23 (permalink)
Rusty Ronin Samurai - Assassin Join Date: Dec 2011 Location: Fayettenam,Pennsyltucky Age: 69 Posts: 35,489 Drives: 2011 Nismo GM 6M Rep Power: 2684438	Yea you do. With the heat from the extra power, and where you live. A 34 row unit. DIGItonium, KaienZ34, Dembflyr and 2 others like this. __________________ 浪人 - 殺し屋 "The Difficult Anytime, The Impossible By Appointment Only" http://www.the370z.com/members-370z-...o-journal.html

11-23-2014, 04:05 PM	#24 (permalink)
Luciano13 A True Z Fanatic Join Date: Mar 2013 Location: Canada Posts: 2,130 Drives: 2016 Solid Redz Rep Power: 246	Sub'D for everything!!! __________________ http://www.the370z.com/members-370z-...lid-red-z.html

11-23-2014, 04:14 PM	#25 (permalink)
TerribleONE A True Z Fanatic Join Date: Jan 2009 Location: Socal Posts: 10,203 Drives: WOT Rep Power: 5851	Oil cooler is a must! KaienZ34, swiss370Z, GaleForce and 1 others like this. __________________ 638WHP 541WTQ @ 13.5PSI Build thread

11-24-2014, 03:14 PM	#27 (permalink)
Luciano13 A True Z Fanatic Join Date: Mar 2013 Location: Canada Posts: 2,130 Drives: 2016 Solid Redz Rep Power: 246	__________________ http://www.the370z.com/members-370z-...lid-red-z.html

11-24-2014, 03:48 PM	#28 (permalink)
jwick A True Z Fanatic Join Date: Dec 2010 Location: Houston Posts: 14,532 Drives: '10 G37 6MT Rep Power: 2465057	I'll jump on the cooler bandwagon. I can spike oil temps 30deg just with a few good boosted pulls on the freeway. That's with an oil pan spacer and 30 row cooler. Temps max out around 210-215degC so no high heat issues but I can only imagine the temps I'd see without the cooler and 8.5qrts of oil cycling. GaleForce likes this. __________________ '10 G37T 6MT Graphite/Graphite - BP - G37T Build

11-24-2014, 04:07 PM	#29 (permalink)
1slow370 A True Z Fanatic Join Date: Aug 2009 Location: In the D Posts: 3,732 Drives: v8 74 260z ;) Rep Power: 7251	well he may have a slight difference in oil temps due to not having oil circulated through his turbos. but yeah the car still needs at least a small cooler. Edit: Except mine I need to remove my cooler. Dry sump + 12.5qts __________________ ANSWER PRICE LIST Answers - - - - - - - - - - - - - - - - $0.75 Answers (requiring thought) - - - - $1.25 Answers (correct) - - - - - - - - - - $12.50

11-24-2014, 04:50 PM	#30 (permalink)
elperuano A True Z Fanatic Join Date: Oct 2011 Location: Southwest FL Posts: 1,374 Drives: G37S Rep Power: 29	^ what kinda kit you running?

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