Nissan 370Z Forum  

oil starvation problem?

I would like to challenge any of you who have done over 10 track events to tear down your motors and show us your rod bearings. Talking to those who

Go Back   Nissan 370Z Forum > Nissan 370Z Tech Area > Track / Autocross / Drifting / Dragstrip


Like Tree38Likes

Reply
 
LinkBack Thread Tools Display Modes
Old 03-05-2014, 09:56 PM   #1 (permalink)
A True Z Fanatic
 
Shamu's Avatar
 
Join Date: Jan 2011
Location: Nor Cal
Posts: 1,059
Drives: 370Z Racecar
Rep Power: 21
Shamu has a reputation beyond reputeShamu has a reputation beyond reputeShamu has a reputation beyond reputeShamu has a reputation beyond reputeShamu has a reputation beyond reputeShamu has a reputation beyond reputeShamu has a reputation beyond reputeShamu has a reputation beyond reputeShamu has a reputation beyond reputeShamu has a reputation beyond reputeShamu has a reputation beyond repute
Default

I would like to challenge any of you who have done over 10 track events to tear down your motors and show us your rod bearings. Talking to those who build VQ race motors it's known that the lack of lead content in bearings starts to break down with oil temps above 240. We also know stock oil pan allows oil starve when cars are generating high Gs at high RPMs.

I was very easy on my motor no track events over stock redline and only ran a couple autocrosses with 8000 rpm redline and my rod bearings were shot. That's with a aM performance pan and big oil cooler. My motor felt great too but feeling great and causing real damage to rod bearings aren't too far apart.
Megan370z and KapitalZ like this.
__________________
Grant

Last edited by Shamu; 03-07-2014 at 07:10 AM.
Shamu is offline   Reply With Quote
Old 03-05-2014, 10:02 PM   #2 (permalink)
Track Member
 
clintfocus's Avatar
 
Join Date: Jan 2011
Location: los angeles
Age: 40
Posts: 933
Drives: 370z, EK Civic, F150
Rep Power: 17
clintfocus will become famous soon enough
Default

Quote:
Originally Posted by Shamu View Post
I would like to challenge any of you who have done over 10 track events to tear down your motors and show us your rod bearings. Talking to those who build VQ race motors it's known that lead content in bearings starts to break down with oil temps above 240. We also know stock oil pan allows oil starve when cars are generating high Gs at high RPMs.

I was very easy on my motor no track events over stock redline and only ran a couple autocrosses with 8000 rpm redline and my rod bearings were shot. That's with a aM performance pan and big oil cooler. My motor felt great too but feeling great and causing real damage to rod bearings aren't too far apart.
im sure my rod bearings are not in the best shape, from both tracking and the fact i have 65k miles, but i do what i can to keep things under 240. Its actually that our bearings have NO lead content since nissan stopped doing that since like 2000, the lead content helped for a more ridig bearing, the bearings we have NOW are more so soft and get even softer at 250+, my close friends (one of which is a mechanical engineer and has alot of Nissan race experience, and my other friend builds Nissan race engines) both tell me do what i can to stay under 250 oil temp. So yeah, im sure things arent all rainbows and cheese inside my motor, i think ill prolly have a rebuild done after this year, just check everything out and fresh/better engine bearings
clintfocus is offline   Reply With Quote
Old 03-06-2014, 12:56 AM   #3 (permalink)
A True Z Fanatic
 
cossie1600's Avatar
 
Join Date: Jun 2009
Location: californee way
Posts: 5,380
Drives: 370, Leaf
Rep Power: 31
cossie1600 has a reputation beyond reputecossie1600 has a reputation beyond reputecossie1600 has a reputation beyond reputecossie1600 has a reputation beyond reputecossie1600 has a reputation beyond reputecossie1600 has a reputation beyond reputecossie1600 has a reputation beyond reputecossie1600 has a reputation beyond reputecossie1600 has a reputation beyond reputecossie1600 has a reputation beyond reputecossie1600 has a reputation beyond repute
Default

You are so right. I just found the dyno sheet showed I made 3 HP less on my third run compare to the first one, except I should mention car was already over 220F oil temp from the first run since the guy had to make 4 runs prior to the official runs to get the RPM readings correct. The three runs were also done within a matter of a minute if you see the time stamp. Oh yeah, maybe the AFM has nothing to do with it. Three hard pulls in 4th gear from a stationary position must do wonder for the AFM too. As Clint said, the car is basically 220F as soon as you start driving on track. So maybe we all have a lemon that doesn't make full power on track.



Quote:
Originally Posted by Megan370z View Post
I was waiting for you to start arguing on me again

there it is;

I will answer to this losing power starting at 220F because this is what I found during dyno testing different stuff 2011.

this picture show 4 lines starting at 90C to 104C which is the last one (pink/purple)




soo now where is YOUR Data and facts ?????






EDIT; before you argue that my dyno sheet is false because it show over800 ft/pds wel take the number and divide it by the gear ratio
I am sure my motor isn't as good as it was new. At the same time the car made enough power after 500+ autox runs (2.5 years), 25-40 track days (don't remember exactly) on the dyno. I am not going to worry or complain about it. Oh yeah it made 84% of the rated power with a bad clutch too, I will take that anyday at 29K miles. Similarly, my old 350 didn't have any noticeable power drop at 49K miles either (yes had dyno done too).

Quote:
Originally Posted by Shamu View Post
I would like to challenge any of you who have done over 10 track events to tear down your motors and show us your rod bearings. Talking to those who build VQ race motors it's known that lead content in bearings starts to break down with oil temps above 240. We also know stock oil pan allows oil starve when cars are generating high Gs at high RPMs.

I was very easy on my motor no track events over stock redline and only ran a couple autocrosses with 8000 rpm redline and my rod bearings were shot. That's with a aM performance pan and big oil cooler. My motor felt great too but feeling great and causing real damage to rod bearings aren't too far apart.
Quote:
Originally Posted by clintfocus View Post
im sure my rod bearings are not in the best shape, from both tracking and the fact i have 65k miles, but i do what i can to keep things under 240. Its actually that our bearings have NO lead content since nissan stopped doing that since like 2000, the lead content helped for a more ridig bearing, the bearings we have NOW are more so soft and get even softer at 250+, my close friends (one of which is a mechanical engineer and has alot of Nissan race experience, and my other friend builds Nissan race engines) both tell me do what i can to stay under 250 oil temp. So yeah, im sure things arent all rainbows and cheese inside my motor, i think ill prolly have a rebuild done after this year, just check everything out and fresh/better engine bearings
cossie1600 is offline   Reply With Quote
Old 03-06-2014, 05:43 AM   #4 (permalink)
A True Z Fanatic
 
Megan370z's Avatar
 
Join Date: Oct 2009
Location: Canada
Posts: 1,156
Drives: 370z
Rep Power: 25
Megan370z has a reputation beyond reputeMegan370z has a reputation beyond reputeMegan370z has a reputation beyond reputeMegan370z has a reputation beyond reputeMegan370z has a reputation beyond reputeMegan370z has a reputation beyond reputeMegan370z has a reputation beyond reputeMegan370z has a reputation beyond reputeMegan370z has a reputation beyond reputeMegan370z has a reputation beyond reputeMegan370z has a reputation beyond repute
Default

Quote:
Originally Posted by cossie1600 View Post
You are so right. I just found the dyno sheet showed I made 3 HP less on my third run compare to the first one, except I should mention car was already over 220F oil temp from the first run since the guy had to make 4 runs prior to the official runs to get the RPM readings correct. The three runs were also done within a matter of a minute if you see the time stamp. Oh yeah, maybe the AFM has nothing to do with it. Three hard pulls in 4th gear from a stationary position must do wonder for the AFM too. As Clint said, the car is basically 220F as soon as you start driving on track. So maybe we all have a lemon that doesn't make full power on track.
).
OHHH SORRY I MADE A MISTAKE
COSSIE 16 00 will you forgive me my dearly god !
you see I'm not afraid to mention it when I'm wrong not like some peoples ! I don't have that ego.


its not oil temp but water temp !
its been a while (3 years)I didn't talk about that subject somehow when I mentioned previously in this thread I was sure it was about the oil..... oups..... my bad

now if you want to argue on this, believe what you want !
but there was a reason why I wrote those temp on the sheet
__________________
Megan Journal *Click Me* ....................One Man Team Motorsport *Click Me*

Last edited by Megan370z; 03-06-2014 at 05:52 AM.
Megan370z is offline   Reply With Quote
Old 03-06-2014, 11:02 AM   #5 (permalink)
A True Z Fanatic
 
cossie1600's Avatar
 
Join Date: Jun 2009
Location: californee way
Posts: 5,380
Drives: 370, Leaf
Rep Power: 31
cossie1600 has a reputation beyond reputecossie1600 has a reputation beyond reputecossie1600 has a reputation beyond reputecossie1600 has a reputation beyond reputecossie1600 has a reputation beyond reputecossie1600 has a reputation beyond reputecossie1600 has a reputation beyond reputecossie1600 has a reputation beyond reputecossie1600 has a reputation beyond reputecossie1600 has a reputation beyond reputecossie1600 has a reputation beyond repute
Default

Water temp makes more sense yes. Oil temp I don't see it
Chuck33079 likes this.
cossie1600 is offline   Reply With Quote
Reply

Bookmarks


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
Hit fuel starvation tonight NitrousZ34 Engine & Drivetrain 28 04-07-2017 07:25 PM
Fuel starvation, who else? Mike Track / Autocross / Drifting / Dragstrip 556 12-14-2016 03:44 PM
Yet another Fuel Starvation Thread Cheech Nissan 370Z General Discussions 16 07-01-2013 09:28 AM
Fuel Starvation Problem Solved? ResIpsa Track / Autocross / Drifting / Dragstrip 7 03-01-2012 05:50 PM


All times are GMT -5. The time now is 05:06 AM.


Powered by vBulletin® Version 3.8.4
Copyright ©2000 - 2026, Jelsoft Enterprises Ltd.
Search Engine Optimization by vBSEO 3.6.0 PL2