Nissan 370Z Forum  

GT-R turbos on the VQ37

I think I got super lucky on this one but time will only tell. Just ran the car through 4 oil changes (cheap oil) just Incase there's any objects but

Go Back   Nissan 370Z Forum > Tech Area > Engine & Drivetrain

Like Tree478Likes

Reply
 
LinkBack Thread Tools Display Modes
Old 07-09-2017, 07:08 PM   #316 (permalink)
Base Member
 
Join Date: Mar 2015
Location: West Bloomfields, MI
Posts: 226
Drives: '13 DART, '12 370Z
Rep Power: 21
husam2012 has a reputation beyond reputehusam2012 has a reputation beyond reputehusam2012 has a reputation beyond reputehusam2012 has a reputation beyond reputehusam2012 has a reputation beyond reputehusam2012 has a reputation beyond reputehusam2012 has a reputation beyond reputehusam2012 has a reputation beyond reputehusam2012 has a reputation beyond reputehusam2012 has a reputation beyond reputehusam2012 has a reputation beyond repute
Default

I think I got super lucky on this one but time will only tell.

Just ran the car through 4 oil changes (cheap oil) just Incase there's any objects but looks good so far.
Oil pressure is approx 100psi on a cold start and 45-50 psi at 2000rpm when warm.

I'm going for a final oil change just after the base tune with M1 0w-40 (GT-R spec oil). I'm thinking that it's a little better for an engine on boost.

Currently I'm just waiting for some 2.25 piping so I can finish the inlets and install everything back on. Base tune should be next week with Ecutek.


Sent from my iPhone using Tapatalk
Rusty, Hotrodz, Jayhovah and 3 others like this.
husam2012 is offline   Reply With Quote
Old 07-09-2017, 07:41 PM   #317 (permalink)
Base Member
 
Join Date: Oct 2016
Location: OKC
Posts: 168
Drives: 2010 touring
Rep Power: 2
SG4247 has much to be proud ofSG4247 has much to be proud ofSG4247 has much to be proud ofSG4247 has much to be proud ofSG4247 has much to be proud ofSG4247 has much to be proud ofSG4247 has much to be proud ofSG4247 has much to be proud ofSG4247 has much to be proud of
Default

This is good news!

But, I am still confused on the Mocal therm plate. I just put one on my car a few weeks ago. The valve is partially open most of the time, and if it stuck in either position you should still have oil pressure.

More info on the filter and sandwich plate failure would be helpful for those of us who run it.
husam2012 likes this.

Last edited by SG4247; 07-09-2017 at 09:38 PM.
SG4247 is offline   Reply With Quote
Old 07-09-2017, 10:04 PM   #318 (permalink)
Base Member
 
Join Date: Oct 2016
Location: OKC
Posts: 168
Drives: 2010 touring
Rep Power: 2
SG4247 has much to be proud ofSG4247 has much to be proud ofSG4247 has much to be proud ofSG4247 has much to be proud ofSG4247 has much to be proud ofSG4247 has much to be proud ofSG4247 has much to be proud ofSG4247 has much to be proud ofSG4247 has much to be proud of
Default

Husam, reading your posts makes me belive you have removed the mocal plate and the oil pressure problem has been resolved?

I was a hydraulics system design engineer for over a decade.

I am thinking that there are two failure modes in the the mocal oil cooler/ filter system that could explain your low oil pressure concerns.

1. Blocked oil cooler or oil cooler lines. If partially blocked, only a small volume of oil would flow back to the filter inlet side (across the thermo bypass valve), effectively causing a big pressure drop in the system.

2. Blocked or damaged oil filter. Definately this condition would be a problem. Cutting the filter open would reveal any malfunctions or manufacturing problems with the filter. Filters designs have an internal bypass to prevent pressure loss in case of element blockage, so this does not happen very often.

I would check these two items out before reinstating the oil cooler system.
husam2012 and Z Runner like this.
SG4247 is offline   Reply With Quote
Old 07-09-2017, 10:07 PM   #319 (permalink)
Base Member
 
Join Date: Mar 2015
Location: West Bloomfields, MI
Posts: 226
Drives: '13 DART, '12 370Z
Rep Power: 21
husam2012 has a reputation beyond reputehusam2012 has a reputation beyond reputehusam2012 has a reputation beyond reputehusam2012 has a reputation beyond reputehusam2012 has a reputation beyond reputehusam2012 has a reputation beyond reputehusam2012 has a reputation beyond reputehusam2012 has a reputation beyond reputehusam2012 has a reputation beyond reputehusam2012 has a reputation beyond reputehusam2012 has a reputation beyond repute
Default

Quote:
Originally Posted by SG4247 View Post
Husam, reading your posts makes me belive you have removed the mocal plate and the oil pressure problem has been resolved?

I was a hydraulics system design engineer for over a decade.

I am thinking that there are two failure modes in the the mocal oil cooler/ filter system that could explain your low oil pressure concerns.

1. Blocked oil cooler or oil cooler lines. If partially blocked, only a small volume of oil would flow back to the filter inlet side (across the thermo bypass valve), effectively causing a big pressure drop in the system.

2. Blocked or damaged oil filter. Definately this condition would be a problem. Cutting the filter open would reveal any malfunctions or manufacturing problems with the filter. Filters designs have an internal bypass to prevent pressure loss in case of element blockage, so this does not happen very often.

I would check these two items out before reinstating the oil cooler system.


Sorry I haven't had the time nor patience to dig in deeper considering I have probably over 150 hours in this project. I'm going to assume installed error before calling it a failure on the Mocal plate since it's very hard to literally get 0 pressure with it installed.

I did try two filters on the sandwich plate and both had exactly 0 pressure. I even unbolted the sensor and started the engine, but nothing more than a few drops came out until I took off the sandwich plate.

I will let you know as soon as I figure it out.


Sent from my iPhone using Tapatalk
husam2012 is offline   Reply With Quote
Old 07-09-2017, 10:14 PM   #320 (permalink)
Base Member
 
rovert's Avatar
 
Join Date: Nov 2015
Location: Australia
Posts: 23
Drives: 08 Skyline 370GT
Rep Power: 2
rovert is on a distinguished road
Default

With a Mocal sandwich plate, oil flow to the engine cannot be stopped.
The thermostat only restricts flow to the cooler, it does not restrict flow to the oil filter.
If the valve is jammed open oil will flow directly to the filter, by passing the cooler, then back to the engine. If it is jammed shut it will flow through the oil cooler first, then back to the engine via the oil filter.
In either scenario the oil returns via the oil filter.
The filter would be my first suspect in this situation.
Husam, did you change the filter when you swapped sandwich plates?
Just a bit concerned for you that the fix was a coincidence & it may happen again with catastrophic results.
Here is a link that explains how these sandwich plates work, it probably explains it a bit better than I do.
Cheers.

https://www.youtube.com/watch?v=l6Z2q-ttyOA
__________________
08 Skyline 370GT SP Coupe 5AT: Whiteline,Transgo,SPL,DBA,PWR,Setrab,Mocal,Project Mu,Z1

Last edited by rovert; 07-09-2017 at 10:19 PM.
rovert is offline   Reply With Quote
Old 07-09-2017, 10:21 PM   #321 (permalink)
Base Member
 
Join Date: Mar 2015
Location: West Bloomfields, MI
Posts: 226
Drives: '13 DART, '12 370Z
Rep Power: 21
husam2012 has a reputation beyond reputehusam2012 has a reputation beyond reputehusam2012 has a reputation beyond reputehusam2012 has a reputation beyond reputehusam2012 has a reputation beyond reputehusam2012 has a reputation beyond reputehusam2012 has a reputation beyond reputehusam2012 has a reputation beyond reputehusam2012 has a reputation beyond reputehusam2012 has a reputation beyond reputehusam2012 has a reputation beyond repute
Default GT-R turbos on the VQ37

I already watched that video among countless others researching this problem.. The only thing I can see is that I might of used a wrong oil filter stud causing the oil to never flow back to the engine after it is filtered. I did try 3 filters of varying brands before taking the Mocal plate off and it worked instantly afterwards.

Last edited by husam2012; 07-09-2017 at 10:23 PM.
husam2012 is offline   Reply With Quote
Old 07-10-2017, 02:09 AM   #322 (permalink)
Base Member
 
Optimiser's Avatar
 
Join Date: Mar 2013
Location: Australia
Posts: 221
Drives: 2012 Nissan 370Z MT
Rep Power: 5
Optimiser is on a distinguished road
Default

Quote:
Originally Posted by husam2012 View Post
I already watched that video among countless others researching this problem.. The only thing I can see is that I might of used a wrong oil filter stud causing the oil to never flow back to the engine after it is filtered. I did try 3 filters of varying brands before taking the Mocal plate off and it worked instantly afterwards.
Wouldn't it be better to just delete the Mocal plate for now and go without it?
Also having to trial and error 3 different oil filters and not being sure about a stud seems risky to try and fix this problem.
Perhaps you might just need to take it to and expert shop at this stage so as not to risk anything further. Just a suggestion now you've got this far on this project.
Optimiser is offline   Reply With Quote
Old 07-13-2017, 08:24 AM   #323 (permalink)
Base Member
 
Join Date: Feb 2017
Location: Christiansburg Virginia
Posts: 36
Drives: 2017 370z Sport
Rep Power: 1
Korstix is on a distinguished road
Default

Hey man, get your base tune yet?
Korstix is online now   Reply With Quote
Old 07-15-2017, 01:24 PM   #324 (permalink)
Base Member
 
Join Date: Mar 2015
Location: West Bloomfields, MI
Posts: 226
Drives: '13 DART, '12 370Z
Rep Power: 21
husam2012 has a reputation beyond reputehusam2012 has a reputation beyond reputehusam2012 has a reputation beyond reputehusam2012 has a reputation beyond reputehusam2012 has a reputation beyond reputehusam2012 has a reputation beyond reputehusam2012 has a reputation beyond reputehusam2012 has a reputation beyond reputehusam2012 has a reputation beyond reputehusam2012 has a reputation beyond reputehusam2012 has a reputation beyond repute
Default

The tuner finally came back from vacation and my base tune is tomorrow afternoon. I pretty much finished everything I hope and just waiting for smaller inlet filters as the ones I bought are too tight of a squeeze.




Sent from my iPhone using Tapatalk
Hotrodz, Jayhovah, YzGyz and 4 others like this.
husam2012 is offline   Reply With Quote
Old 07-15-2017, 02:01 PM   #325 (permalink)
Enthusiast Member
 
Join Date: May 2014
Location: Riverside
Posts: 465
Drives: 40th 370Z
Rep Power: 4
lj909 is on a distinguished road
Default

So excite!
__________________
PW 07 HR350Z R.I.P. Totaled by 82yr old woman
2010 40th Anniversary 370Z
lj909 is offline   Reply With Quote
Old 07-16-2017, 06:44 PM   #326 (permalink)
Base Member
 
Join Date: Mar 2015
Location: West Bloomfields, MI
Posts: 226
Drives: '13 DART, '12 370Z
Rep Power: 21
husam2012 has a reputation beyond reputehusam2012 has a reputation beyond reputehusam2012 has a reputation beyond reputehusam2012 has a reputation beyond reputehusam2012 has a reputation beyond reputehusam2012 has a reputation beyond reputehusam2012 has a reputation beyond reputehusam2012 has a reputation beyond reputehusam2012 has a reputation beyond reputehusam2012 has a reputation beyond reputehusam2012 has a reputation beyond repute
Default

Finally finished my base tune and ran the car with boost. I will be buying his GTR map sensor to SD tune it also (good idea?)

The car runs awesome and i will be tuning it more on the street as soon as my new filters come in. Ran it on wastegate boost (4psi) and it was awesome!

Dyno tune is in a week or two depending on the dyno's availability.
Rusty, Hotrodz, Elmo370z and 13 others like this.
husam2012 is offline   Reply With Quote
Old 07-16-2017, 09:30 PM   #327 (permalink)
Premium Member
 
Z Runner's Avatar
 
Join Date: Sep 2015
Location: Puerto Rico
Posts: 228
Drives: 2016 370Z KAD M Base
Rep Power: 2
Z Runner is on a distinguished road
Default

Grate job! Glad that it worked out.
Z Runner is offline   Reply With Quote
Old 07-17-2017, 09:29 AM   #328 (permalink)
Wat
 
Jayhovah's Avatar
 
Join Date: May 2013
Location: St. Pete, FL
Posts: 2,186
Drives: 520whp Fire Breather
Rep Power: 3239
Jayhovah has a reputation beyond reputeJayhovah has a reputation beyond reputeJayhovah has a reputation beyond reputeJayhovah has a reputation beyond reputeJayhovah has a reputation beyond reputeJayhovah has a reputation beyond reputeJayhovah has a reputation beyond reputeJayhovah has a reputation beyond reputeJayhovah has a reputation beyond reputeJayhovah has a reputation beyond reputeJayhovah has a reputation beyond repute
Default

Quote:
Originally Posted by husam2012 View Post
Finally finished my base tune and ran the car with boost. I will be buying his GTR map sensor to SD tune it also (good idea?)

The car runs awesome and i will be tuning it more on the street as soon as my new filters come in. Ran it on wastegate boost (4psi) and it was awesome!

Dyno tune is in a week or two depending on the dyno's availability.
CONGRATS man!!!!! Really impressive build.

As far as your question - my tuner (JTRAN) did not, to my knowledge, upgrade my MAP sensor so I think I am on a straight MAF tune. I think that choice is up to the tuner you choose... but it looks like Seb@SpecialtyZ prefers SD and people have had great results with his tunes.
__________________
2013 Gun Metallic Sport - Gamma V3 Twin Turbogized
First DIY Gamma V3 TT Install * Jayhovah's Gamma V3 TT Install Pic'Z and Vid'Z * DIY: Washer Reservoir for the Boosted
Quote:
Originally Posted by OptionZero View Post
i think its worth taking an extra minute to make your post a bit more coherent
Jayhovah is online now   Reply With Quote
Old 07-17-2017, 09:43 AM   #329 (permalink)
Base Member
 
Join Date: Mar 2015
Location: West Bloomfields, MI
Posts: 226
Drives: '13 DART, '12 370Z
Rep Power: 21
husam2012 has a reputation beyond reputehusam2012 has a reputation beyond reputehusam2012 has a reputation beyond reputehusam2012 has a reputation beyond reputehusam2012 has a reputation beyond reputehusam2012 has a reputation beyond reputehusam2012 has a reputation beyond reputehusam2012 has a reputation beyond reputehusam2012 has a reputation beyond reputehusam2012 has a reputation beyond reputehusam2012 has a reputation beyond repute
Default

Quote:
Originally Posted by Jayhovah View Post
CONGRATS man!!!!! Really impressive build.



As far as your question - my tuner (JTRAN) did not, to my knowledge, upgrade my MAP sensor so I think I am on a straight MAF tune. I think that choice is up to the tuner you choose... but it looks like Seb@SpecialtyZ prefers SD and people have had great results with his tunes.


Thank you! I can't wait till I can finally go WOT on this car but just hearing it spool is awesome.

Unfortunately I was trying to be stealthy but it looks like that's impossible as the turbos spool so loud and the BOVs are also really loud haha

husam2012 is offline   Reply With Quote
Old 07-17-2017, 10:12 AM   #330 (permalink)
Now a Ronin Samurai
 
Rusty's Avatar
 
Join Date: Dec 2011
Location: Pennsyltucky
Age: 61
Posts: 6,100
Drives: 2011 Nismo GM 6M
Rep Power: 2338
Rusty has a reputation beyond reputeRusty has a reputation beyond reputeRusty has a reputation beyond reputeRusty has a reputation beyond reputeRusty has a reputation beyond reputeRusty has a reputation beyond reputeRusty has a reputation beyond reputeRusty has a reputation beyond reputeRusty has a reputation beyond reputeRusty has a reputation beyond reputeRusty has a reputation beyond repute
Talking

Running around the neighborhood with no front bumper showing off the intercooler is not stealth.
__________________
After Mods-334HP-279Tor. STD.|F.I. LTH|CBE/12" Resonators|Stillen Gen3|285/35-19, 345/30-19 Mich PSS on 9.5x19 and 12x19 ForgeLine Rims, Nismo RC Brake Ducts,|UpRev Tuned|http://www.the370z.com/members-370z-...o-journal.html
Rusty is offline   Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
[FOR SALE] Turbos NIZZING Parts for sale (Private Classifieds) 1 10-16-2016 09:03 PM
[FOR SALE] Turbos NIZZING Parts for sale (Private Classifieds) 0 08-11-2015 03:30 PM
[FOR SALE] Someone please buy my turbos! NIZZING Parts for sale (Private Classifieds) 3 11-12-2014 08:47 PM
EFR Turbos frydrce Forced Induction 34 08-30-2012 09:43 AM
somebody who knows a lot about turbos please help kevin1985912 Forced Induction 15 10-05-2010 11:00 AM


All times are GMT -5. The time now is 07:49 AM.


Powered by vBulletin® Version 3.8.4
Copyright ©2000 - 2017, Jelsoft Enterprises Ltd.
Search Engine Optimization by vBSEO 3.6.0 PL2