TravisJB Journal

travisjb · 02-23-2014, 08:43 AM

Had some fun yesterday at Road Atlanta... mechanical issues ended things early (again), which I'll go into below... first, here are a couple videos

First one is chasing a blue GTR with license plate "FORGED"... ~2:00 getting more aggressive on those corners and making up time... 2:30 held up at turn 7 then lost a drag race... 3:25 missed 4th gear... 3:55 drafting... 4:10 mechanical failure #1 left front locked up despite ABS being on (so I thought)

I decided to keep going... couldn't figure out what happened to the brakes, nothing visually wrong... lots of traffic, was having a blast... 3:38 had to catch one! now I'm feeling good... then, 3:48 engine starting cutting out... 4:40 will I make it back?... nope, 4:58 engine cuts and I ditch it... see blinking light? that's oil pressure, so now I'm worried I dumped oil

Will move the camera up 6 inches in the future.

travisjb · 02-23-2014, 08:51 AM

So, here's what we think happened... brought the car to CIN in Charlotte late last night on the way home from Atlanta... the Engine Room Harness runs along drivers side fender and carries signals necessary for ABS and pretty much everything else... as it turns out, my brake failure and engine failure are related! the harness had come loose and dropped down so that it was making contact with left front tire... from there, everything went south

I think that's something to take note of for anyone that has removed their fender liners... make an extra effort to secure any wiring harnesses that pass through in that area. Hopefully this post saves someone from a similar situation.

Will try to post picture later.

Megan370z · 02-23-2014, 09:10 AM

good !!! if its only because of the wiring harness

The video brought me some old memories about an engine with a blown VVEL & Oil pump because it was acting similar to when your Z started to die.

travisjb · 02-23-2014, 09:12 AM

yeah, fingers crossed its just the wiring harness... jury is still out... the fact that the gauge was showing zero oil pressure was not a good sign, however, the oil temps were reasonable and suggest oil was flowing just fine

Megan370z · 02-23-2014, 09:17 AM

Quote:

Originally Posted by travisjb

yeah, fingers crossed its just the wiring harness... jury is still out... the fact that the gauge was showing zero oil pressure was not a good sign, however, the oil temps were reasonable and suggest oil was flowing just fine

so the car hasn't been started after you dropped it at the garage ?

because from what I remember the oil pressure gauge is connected via CAN with the main cluster then to the ECU and the electrical flow path goes from the passenger side wiring harness. and not the driver one which is mainly for the ABS/brake booster/lighting aera.

travisjb · 02-23-2014, 09:32 AM

I'm using an aftermarket oil pressure gauge with a dedicated pressure sensor...

It has not been started yet

It is possible there is something deeper involved. We're going to address the harness first, then we'll see!

wstar · 02-23-2014, 11:01 AM

Seems like the low oil flasher came on pretty much simultaneously with the engine dying. Engines make zero oil pressure at zero RPM, and hot oil at very very low RPM in the last split second of engine life might've had naturally low pressure, too. I bet after the wiring harness is fixed you're fine, especially given you had some cool-down time while the engine was dying. Good luck!

travisjb · 02-23-2014, 11:22 AM

Thanks! think / hope you're right

SPOHN · 02-23-2014, 07:28 PM

Yes I have no fender liners. I will be double checking that. Great video Travis I will be watching this a lot. Still going over my videos. My best time as of far is 1:46. I'm just happy to get threw the first weekend in 10 months with a hole different car.

Also nice to meet you again.

travisjb · 02-23-2014, 07:37 PM

That's a respectable time and I saw you out there consistently passing cars at start/finish, and moving your braking point downfield at turn 1. Nice driving!

Great to meet you and your dad! I owe you guys some beers for helping to push my z back in the trailer.

Mike · 02-23-2014, 08:20 PM

That was Sharif you were following. Glad to hear its probably just a harness. Spohn told me you had troubles.

Going to NASA next month?

travisjb · 02-23-2014, 08:27 PM

hey mike. not sure what my next track event will be - really want to get back to VIR to see how the new pavement works out... will miss the chin event in two weeks, unfortunately

carlitos_370z · 02-24-2014, 06:02 AM

Damn travis good runs bro!!! sorry to hear about the mechanical problems that you have!!!

wstar · 02-24-2014, 08:02 AM

So, what's the tradeoff on removing the fender liners? (well, aside from the now-obvious wiring caveat!). I hadn't considered it before. Better airflow around the brakes, but you get some more splash into the bay on wet track days? Doesn't screw up radiator airflow or general aerodynamics?

travisjb · 02-24-2014, 07:45 PM

Hey Brandon. I don't recommend removing them for the reasons you state relating to preserving oem flow through radiator and also because less airflow around the tires = less drag. Best to avoid for those and other reasons. In my case, reasons we removed because remove/replace choir was a PITA, were wearing them out, had been hacking them up for mods like 3" brake ducts and others constantly anyways, and a lot of the front end was redone so OE attach points gone, relocated, etc. They were hanging on for dear life and put them out of their misery.

02-23-2014, 08:43 AM	#1 (permalink)
travisjb A True Z Fanatic Join Date: Jan 2009 Location: GSO Posts: 2,803 Drives: VIR Rep Power: 189	Had some fun yesterday at Road Atlanta... mechanical issues ended things early (again), which I'll go into below... first, here are a couple videos First one is chasing a blue GTR with license plate "FORGED"... ~2:00 getting more aggressive on those corners and making up time... 2:30 held up at turn 7 then lost a drag race... 3:25 missed 4th gear... 3:55 drafting... 4:10 mechanical failure #1 left front locked up despite ABS being on (so I thought) I decided to keep going... couldn't figure out what happened to the brakes, nothing visually wrong... lots of traffic, was having a blast... 3:38 had to catch one! now I'm feeling good... then, 3:48 engine starting cutting out... 4:40 will I make it back?... nope, 4:58 engine cuts and I ditch it... see blinking light? that's oil pressure, so now I'm worried I dumped oil Will move the camera up 6 inches in the future. carlitos_370z likes this. __________________ 2009 370Z #104 For Sale

02-23-2014, 08:51 AM	#2 (permalink)
travisjb A True Z Fanatic Join Date: Jan 2009 Location: GSO Posts: 2,803 Drives: VIR Rep Power: 189	So, here's what we think happened... brought the car to CIN in Charlotte late last night on the way home from Atlanta... the Engine Room Harness runs along drivers side fender and carries signals necessary for ABS and pretty much everything else... as it turns out, my brake failure and engine failure are related! the harness had come loose and dropped down so that it was making contact with left front tire... from there, everything went south I think that's something to take note of for anyone that has removed their fender liners... make an extra effort to secure any wiring harnesses that pass through in that area. Hopefully this post saves someone from a similar situation. Will try to post picture later. __________________ 2009 370Z #104 For Sale

02-23-2014, 09:10 AM	#3 (permalink)
Megan370z A True Z Fanatic Join Date: Oct 2009 Location: Canada Posts: 1,156 Drives: 370z Rep Power: 24	good !!! if its only because of the wiring harness The video brought me some old memories about an engine with a blown VVEL & Oil pump because it was acting similar to when your Z started to die. __________________ Megan Journal Click Me ....................One Man Team Motorsport Click Me

02-23-2014, 09:12 AM	#4 (permalink)
travisjb A True Z Fanatic Join Date: Jan 2009 Location: GSO Posts: 2,803 Drives: VIR Rep Power: 189	yeah, fingers crossed its just the wiring harness... jury is still out... the fact that the gauge was showing zero oil pressure was not a good sign, however, the oil temps were reasonable and suggest oil was flowing just fine __________________ 2009 370Z #104 For Sale

02-23-2014, 09:32 AM	#6 (permalink)
travisjb A True Z Fanatic Join Date: Jan 2009 Location: GSO Posts: 2,803 Drives: VIR Rep Power: 189	I'm using an aftermarket oil pressure gauge with a dedicated pressure sensor... It has not been started yet It is possible there is something deeper involved. We're going to address the harness first, then we'll see! Megan370z likes this. __________________ 2009 370Z #104 For Sale

02-23-2014, 11:01 AM	#7 (permalink)
wstar A True Z Fanatic Join Date: Mar 2009 Location: Houston, TX Posts: 4,024 Drives: too slow Rep Power: 3595	Seems like the low oil flasher came on pretty much simultaneously with the engine dying. Engines make zero oil pressure at zero RPM, and hot oil at very very low RPM in the last split second of engine life might've had naturally low pressure, too. I bet after the wiring harness is fixed you're fine, especially given you had some cool-down time while the engine was dying. Good luck! __________________ 7AT Track Car! Journal thread / Car setup details

02-23-2014, 11:22 AM	#8 (permalink)
travisjb A True Z Fanatic Join Date: Jan 2009 Location: GSO Posts: 2,803 Drives: VIR Rep Power: 189	Thanks! think / hope you're right __________________ 2009 370Z #104 For Sale

02-23-2014, 07:28 PM	#9 (permalink)
SPOHN A True Z Fanatic Join Date: Feb 2010 Location: Covington, GA Age: 46 Posts: 14,844 Drives: Waiting on next Z Rep Power: 222	Yes I have no fender liners. I will be double checking that. Great video Travis I will be watching this a lot. Still going over my videos. My best time as of far is 1:46. I'm just happy to get threw the first weekend in 10 months with a hole different car. Also nice to meet you again. __________________

02-23-2014, 07:37 PM	#10 (permalink)
travisjb A True Z Fanatic Join Date: Jan 2009 Location: GSO Posts: 2,803 Drives: VIR Rep Power: 189	That's a respectable time and I saw you out there consistently passing cars at start/finish, and moving your braking point downfield at turn 1. Nice driving! Great to meet you and your dad! I owe you guys some beers for helping to push my z back in the trailer. SPOHN likes this. __________________ 2009 370Z #104 For Sale

02-23-2014, 08:20 PM	#11 (permalink)
Mike The370Z.com Sponsor Join Date: Jun 2009 Location: Loganville, GA Posts: 5,944 Drives: 370z Rep Power: 2186	That was Sharif you were following. Glad to hear its probably just a harness. Spohn told me you had troubles. Going to NASA next month? __________________ NISSAN: 75 280Z / 86 300ZX GLL /87 Sentra SE / 03 350Z / 23 Z Porsche: 93 968 / 23 Macan GTS / 93 968

02-23-2014, 08:27 PM	#12 (permalink)
travisjb A True Z Fanatic Join Date: Jan 2009 Location: GSO Posts: 2,803 Drives: VIR Rep Power: 189	hey mike. not sure what my next track event will be - really want to get back to VIR to see how the new pavement works out... will miss the chin event in two weeks, unfortunately __________________ 2009 370Z #104 For Sale

02-24-2014, 06:02 AM	#13 (permalink)
carlitos_370z A True Z Fanatic Join Date: Jul 2013 Location: Puerto Rico Posts: 7,157 Drives: 13 Nissan 370Z SP M6 Rep Power: 7586	Damn travis good runs bro!!! sorry to hear about the mechanical problems that you have!!!

02-24-2014, 08:02 AM	#14 (permalink)
wstar A True Z Fanatic Join Date: Mar 2009 Location: Houston, TX Posts: 4,024 Drives: too slow Rep Power: 3595	So, what's the tradeoff on removing the fender liners? (well, aside from the now-obvious wiring caveat!). I hadn't considered it before. Better airflow around the brakes, but you get some more splash into the bay on wet track days? Doesn't screw up radiator airflow or general aerodynamics? __________________ 7AT Track Car! Journal thread / Car setup details

02-24-2014, 07:45 PM	#15 (permalink)
travisjb A True Z Fanatic Join Date: Jan 2009 Location: GSO Posts: 2,803 Drives: VIR Rep Power: 189	Hey Brandon. I don't recommend removing them for the reasons you state relating to preserving oem flow through radiator and also because less airflow around the tires = less drag. Best to avoid for those and other reasons. In my case, reasons we removed because remove/replace choir was a PITA, were wearing them out, had been hacking them up for mods like 3" brake ducts and others constantly anyways, and a lot of the front end was redone so OE attach points gone, relocated, etc. They were hanging on for dear life and put them out of their misery. __________________ 2009 370Z #104 For Sale

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