Fuel starvation, who else?

import111 · 01-17-2010, 08:22 AM

Yesterday was my 2nd track day in the 370Z. 1st track day I did not experience any fuel starvation...probably because I kept the tank very full due to the rumors. Yesterday They did a time attack event at the end of the day and I had 3/4 of a tank left and thought, "4 laps is not worth going to the gas station and back, I should be good". I was wrong. Hard fuel cut coming out of right hand corners. I am going to have to keep the tank full at the track until a solution is found for this.

travisjb · 01-17-2010, 08:46 AM

I'm still planning to try and work up an inexpensive in-tank solution next 2-3 weeks... hopefully someone else tries the external swirl pot solution and we can compare notes

ZForce · 01-18-2010, 06:33 PM

import111...that sux
travisjb...keep us posted

CrownR426 · 01-18-2010, 09:37 PM

Always remember to fill tanks only 90%

matrix_square · 01-18-2010, 10:48 PM

why 90% ?

travisjb · 01-18-2010, 11:47 PM

perhaps you mean no less than 90% ?

zinistr · 01-20-2010, 03:16 PM

Interesting topic, amazing how many glitches a sixth-generation Z can still experience. Looking forward to hearing about a fix to this.

Bluemeanie · 02-09-2010, 08:58 AM

My last time out at ACS I experienced a cut out just as I was leaving the staging area and not in a turn and with a 1/2 tank. The car just cut out. I'd let off and give it gas and then it would cut out again. I'm not sure which RPM. I went back to the pits and filled up and when I tried to start it it would not start as easily as it used too. At one point I wasn't sure if it would start at all. After awhile it started like normal and everything was ok. Funny thing is, I've run the car at Willow almost on empty and didn't have a problem.

Stan

travisjb · 02-09-2010, 09:45 AM

where you going CW or CCW at Willow ? I'm guessing CCW... issues arise in hard right hand turns

Bluemeanie · 02-10-2010, 09:14 AM

Quote:

Originally Posted by travisjb

where you going CW or CCW at Willow ? I'm guessing CCW... issues arise in hard right hand turns

I had no issues at the Big track at Willow CW or the streets CW. At ACS I was just starting to leave the starting area and didn't get 100ft when it cut out. I pulled to the left and let everyone pass by me and then backed up to get off the starting grid. I wasn't even on the track yet. It was flat and straight. Go figure.

Stan

boosted180 · 02-10-2010, 12:52 PM

my car will cut out at *every* track day if i dont keep it at least 75% full. at first i thought it was limp mode kicking on too early (260 degrees), but it's the fuel starvation. it's a hassle to always have to keep it close to full, but as long as i do that, no problems.

cant wait for someone to come up with a real fix.

RCZ · 02-11-2010, 09:16 AM

Oh man...I haven't had this happen to me yet since the track i usually run goes ccw, but Im thinking about PBIR and the back corner, its a very long banked right hander. When I looked at it the other day I thought "fuel starvation city" and didnt put that thought and my car together till right now. Someone please figure this out.

phunk · 02-14-2010, 02:56 PM

We have been working on a prototype for an in-tank surge can / fuel pump assembly that is specifically intended for road racing.

We are in Chicago, so there is no way for us to do any field testing. However, if there is a reputable member here that is actively taking their 370z to track days and experiencing the fuel starvation issue, and has the means to install a new fuel pump assembly on their own.. I would be interested in sending a prototype to test in roughly 2 weeks. PM me if so.

travisjb · 02-14-2010, 07:31 PM

I'm your man! Next event is march 6/7

Travisjb@gmail.com

RCZ · 02-14-2010, 07:54 PM

^ haha, he's definitely the man for you.

If you need a non race car for testing stuff out, let me know. I go on the track too

01-17-2010, 08:46 AM	#32 (permalink)
travisjb A True Z Fanatic Join Date: Jan 2009 Location: GSO Posts: 2,803 Drives: VIR Rep Power: 188	I'm still planning to try and work up an inexpensive in-tank solution next 2-3 weeks... hopefully someone else tries the external swirl pot solution and we can compare notes __________________ 2009 370Z #104 For Sale

01-18-2010, 09:37 PM	#34 (permalink)
CrownR426 A True Z Fanatic Join Date: Nov 2008 Location: South Korea Posts: 4,676 Drives: Manual Rep Power: 847	Always remember to fill tanks only 90% __________________ Love + Hardwork + Passion RIP SVTRacer

01-18-2010, 10:48 PM	#35 (permalink)
matrix_square Enthusiast Member Join Date: Dec 2009 Location: Atlanta Posts: 452 Drives: Evo9-S2K-RSX-S-Z370? Rep Power: 15	why 90% ? __________________ 2004 Honda S2000 GPW 2005 Honda S2000 Suzuka Blue 2005 Acura RSX Type-S PWP 2006 Mitsubishi Lancer EVO 9 MR Graphite Gray Nissan 370Z Monterrey Blue Sport/Touring/Nav package

01-18-2010, 11:47 PM	#36 (permalink)
travisjb A True Z Fanatic Join Date: Jan 2009 Location: GSO Posts: 2,803 Drives: VIR Rep Power: 188	perhaps you mean no less than 90% ? __________________ 2009 370Z #104 For Sale

01-20-2010, 03:16 PM	#37 (permalink)
zinistr Premium Member Join Date: Jul 2009 Location: Chardon, Ohio Posts: 127 Drives: 2009 Nismo - Silver Rep Power: 15	Interesting topic, amazing how many glitches a sixth-generation Z can still experience. Looking forward to hearing about a fix to this. __________________ 1970 Datsun 240z (HLS #201) & '71 240z "Zuns Z" 1991 300zx TT 'ZINISTR' & '93 300zx Vert TT "MASTR" 1994 300zx Vert 'BREEZZY' & 1995 300zx Z32 Coupe 2009 NISMO Edition 370Z, Silver #196

01-17-2010, 08:22 AM	#31 (permalink)
import111 Track Member Join Date: Feb 2009 Location: Tucson, AZ. Posts: 622 Drives: 09 Nissan 370Z Rep Power: 191	Yesterday was my 2nd track day in the 370Z. 1st track day I did not experience any fuel starvation...probably because I kept the tank very full due to the rumors. Yesterday They did a time attack event at the end of the day and I had 3/4 of a tank left and thought, "4 laps is not worth going to the gas station and back, I should be good". I was wrong. Hard fuel cut coming out of right hand corners. I am going to have to keep the tank full at the track until a solution is found for this.

01-18-2010, 06:33 PM	#33 (permalink)
ZForce A True Z Fanatic Join Date: Jul 2009 Location: Roseville, CA Posts: 2,359 Drives: 09 370Z Tour + Sport Rep Power: 20	import111...that sux travisjb...keep us posted

02-09-2010, 08:58 AM	#38 (permalink)
Bluemeanie Base Member Join Date: Nov 2009 Location: same as it always was.. Posts: 81 Drives: '09 370Z Rep Power: 15	My last time out at ACS I experienced a cut out just as I was leaving the staging area and not in a turn and with a 1/2 tank. The car just cut out. I'd let off and give it gas and then it would cut out again. I'm not sure which RPM. I went back to the pits and filled up and when I tried to start it it would not start as easily as it used too. At one point I wasn't sure if it would start at all. After awhile it started like normal and everything was ok. Funny thing is, I've run the car at Willow almost on empty and didn't have a problem. Stan

02-09-2010, 09:45 AM	#39 (permalink)
travisjb A True Z Fanatic Join Date: Jan 2009 Location: GSO Posts: 2,803 Drives: VIR Rep Power: 188	where you going CW or CCW at Willow ? I'm guessing CCW... issues arise in hard right hand turns __________________ 2009 370Z #104 For Sale

02-10-2010, 12:52 PM	#41 (permalink)
boosted180 Base Member Join Date: Jul 2009 Location: long beach Posts: 188 Drives: '09 370z sport 6m Rep Power: 15	my car will cut out at every track day if i dont keep it at least 75% full. at first i thought it was limp mode kicking on too early (260 degrees), but it's the fuel starvation. it's a hassle to always have to keep it close to full, but as long as i do that, no problems. cant wait for someone to come up with a real fix.

02-11-2010, 09:16 AM	#42 (permalink)
RCZ A True Z Fanatic Join Date: Nov 2008 Location: Miami Posts: 6,403 Drives: '09 370Z Rep Power: 1118	Oh man...I haven't had this happen to me yet since the track i usually run goes ccw, but Im thinking about PBIR and the back corner, its a very long banked right hander. When I looked at it the other day I thought "fuel starvation city" and didnt put that thought and my car together till right now. Someone please figure this out.

02-14-2010, 02:56 PM	#43 (permalink)
phunk A True Z Fanatic Join Date: Mar 2009 Location: Chicago Posts: 3,654 Drives: 370 Rep Power: 944523	We have been working on a prototype for an in-tank surge can / fuel pump assembly that is specifically intended for road racing. We are in Chicago, so there is no way for us to do any field testing. However, if there is a reputable member here that is actively taking their 370z to track days and experiencing the fuel starvation issue, and has the means to install a new fuel pump assembly on their own.. I would be interested in sending a prototype to test in roughly 2 weeks. PM me if so. __________________ Charles @ CJ Motorsports : Website \| Facebook \| Instagram \| YouTube Home of the 9 second, stock longblock, stock drivetrain 6MT 370z. 9.91 @ 142mph

02-14-2010, 07:31 PM	#44 (permalink)
travisjb A True Z Fanatic Join Date: Jan 2009 Location: GSO Posts: 2,803 Drives: VIR Rep Power: 188	I'm your man! Next event is march 6/7 Travisjb@gmail.com __________________ 2009 370Z #104 For Sale

02-14-2010, 07:54 PM	#45 (permalink)
RCZ A True Z Fanatic Join Date: Nov 2008 Location: Miami Posts: 6,403 Drives: '09 370Z Rep Power: 1118	^ haha, he's definitely the man for you. If you need a non race car for testing stuff out, let me know. I go on the track too

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