Fuel starvation, who else?

sarmyth · 05-08-2011, 08:09 PM

I ran into this issue this weekend at the track, just below half full on gas with a particular long sweeping right hand turn.... Happened three laps in a row exact same spot and symptom, engine pegs at 6k for a couple seconds then releases. Filled up and no problems... On goodrich r1s about 100 degrees out, oil at 260.

For those who've blazed this trail already, any solutions short of a surge tank?

travisjb · 05-08-2011, 08:13 PM

Sorry guys, I'm laying low... new job, new house, etc... haven't been putting this tank setup to test, and last few times I did, it allowed me to get to about 1/2 a tank with no fuel starvation... keep in mind, I'm pulling some very heavy G's with race slicks... I think it is good enough for most especially if tweaked... I don't represent the vendor - someone is going to have to call him and prod him a bit to get him to fully commercialize it... richard@nohotwire.com... he'll probably say he's waiting on me to document the install some more, but I just don't have time right now, unfortunately

MightyBobo · 05-08-2011, 08:43 PM

YOU THINK YOUR LIFE PROBLEMS ARE OF OUR CONCERN, TRAVIS?! GET OUT THERE AND TEST, GOD DAMNIT!

Just kidding, sounds like its a start at least

cossie1600 · 05-08-2011, 11:06 PM

Quote:

Originally Posted by spearfish25

There is no way the pickup is at the top of the tank. You'd 'run out' of fuel every time you used a few gallons.

Much more likely is the pickup is at the bottom, but either the tank design or the pump internals have a problem with lateral g's. Tank design would suggest all the fuel sloshes away from the pump and the pickup can grab air. Pump design would be more difficult to assign blame (aside from pickup location), but raises my suspicion as the reason when fuel starvation occurs with a full tank. I don't know how a full tank can slosh enough for the bottom of the pump to be exposed to air.

I was chatting with my buddy about this. How about wire a regular fuel pump on the fuel sending unit side and just dump the outlet back on the passenger side for the fuel pump. It would just be a constant recirculating fuel pump and cost virtually nothing

KORRUPT · 05-11-2011, 08:01 PM

Wish I would have seen this thread before tonight. Just had my 09 towed after buying it 3 weeks ago. Took and right turn onramp agressively, then accelerated hard to merge into traffic on an uphill straight with about 1/4 tank of gas. Apparently the " perfect storm ," the car completely died and as I was parked on an incline the car wouldn't start no matter how many times I tried. Oh well its at the dealership now I guess I'll let them check it out anyway just in case. Sucky!!

spearfish25 · 05-11-2011, 09:27 PM

Quote:

Originally Posted by cossie1600

I was chatting with my buddy about this. How about wire a regular fuel pump on the fuel sending unit side and just dump the outlet back on the passenger side for the fuel pump. It would just be a constant recirculating fuel pump and cost virtually nothing

It could work, but modding in the fuel tank with new pumps and wiring makes me nervous. You'd also need a float switch for the auxillary pump so it doesnt burn out running dry.

ArtVandaleigh · 05-22-2011, 07:34 PM

Ha, glad I saw this thread... I had the same issue for the first time today doing a time trial event. I have not experienced this yet owning the car for over 2 1/2 years now, but it happened to be on a right hand sweeper, with oil temps around 255 and mid-rpm 3rd gear. Same fuel cut each time on the same corner... definitely a bummer though, I had well over a half tank too. I initially thought the car was going into limp mode, but after a few seconds of nothing, I could accelerate again. Odd that Nissan never caught this in testing?

cossie1600 · 05-22-2011, 08:23 PM

they know, they judt dnt care to give a $hit

batboyvaj · 06-07-2011, 08:06 AM

has anyone with a 2011 been out to the track experienced this issue?

MightyBobo · 06-07-2011, 01:08 PM

Quote:

Originally Posted by batboyvaj

has anyone with a 2011 been out to the track experienced this issue?

I doubt they've fixed the problem in the 2011's.

cossie1600 · 06-07-2011, 09:55 PM

Quote:

Originally Posted by spearfish25

It could work, but modding in the fuel tank with new pumps and wiring makes me nervous. You'd also need a float switch for the auxillary pump so it doesnt burn out running dry.

Basically anything is difficult because the gas tank is a sealed unit with two peepholes. Short of replacing the gas tank or modifing the pickup point (which I dont think you can), you are better off carrying a 5 gallon jug...

RCZ · 07-15-2011, 10:33 AM

Hey guys, I dont know where this ended up, but I was talking to a fabricator yesterday who said he could make me a surge tank with twin racing Bosch pumps for near $1500 all said and done. That would completely fix this problem. Anyone interested?

ChrisSlicks · 07-15-2011, 12:17 PM

Where would he locate the surge tank? Per club rules I'm not allowed any fuel lines in the passenger compartment, which in the case of the Z includes the trunk.

cossie1600 · 07-15-2011, 01:04 PM

How about an external surge tank, is there enough space underneath the car?

$1500, i can buy tons of $5 gallon jug and a dedicated trailer...

corner3garage · 07-15-2011, 01:41 PM

according to mike bonanni at 370Z starts fuel starving at 7/8 tank. Surge tank would be good.

05-08-2011, 08:09 PM	#121 (permalink)
sarmyth Base Member Join Date: Apr 2010 Location: CA Posts: 96 Drives: 370z Roadster Rep Power: 15	I ran into this issue this weekend at the track, just below half full on gas with a particular long sweeping right hand turn.... Happened three laps in a row exact same spot and symptom, engine pegs at 6k for a couple seconds then releases. Filled up and no problems... On goodrich r1s about 100 degrees out, oil at 260. For those who've blazed this trail already, any solutions short of a surge tank? Last edited by sarmyth; 05-08-2011 at 08:12 PM.

05-08-2011, 08:13 PM	#122 (permalink)
travisjb A True Z Fanatic Join Date: Jan 2009 Location: GSO Posts: 2,803 Drives: VIR Rep Power: 188	Sorry guys, I'm laying low... new job, new house, etc... haven't been putting this tank setup to test, and last few times I did, it allowed me to get to about 1/2 a tank with no fuel starvation... keep in mind, I'm pulling some very heavy G's with race slicks... I think it is good enough for most especially if tweaked... I don't represent the vendor - someone is going to have to call him and prod him a bit to get him to fully commercialize it... richard@nohotwire.com... he'll probably say he's waiting on me to document the install some more, but I just don't have time right now, unfortunately __________________ 2009 370Z #104 For Sale

05-08-2011, 08:43 PM	#123 (permalink)
MightyBobo A True Z Fanatic Join Date: Feb 2009 Location: Las Vegas, NV Posts: 8,465 Drives: No cars; only bikes Rep Power: 52	YOU THINK YOUR LIFE PROBLEMS ARE OF OUR CONCERN, TRAVIS?! GET OUT THERE AND TEST, GOD DAMNIT! Just kidding, sounds like its a start at least __________________ I don't own a car anymore.

07-15-2011, 12:17 PM	#133 (permalink)
ChrisSlicks A True Z Fanatic Join Date: Mar 2009 Location: North East Posts: 6,203 Drives: 09 370Z Sport M6 Rep Power: 653	Where would he locate the surge tank? Per club rules I'm not allowed any fuel lines in the passenger compartment, which in the case of the Z includes the trunk. __________________ Hotchkis ARB \| Stillen CAI \| Art Pipes \| Berk CBE \| Stillen AP Racing Brakes \| AE Performance Oil Cooler \| BC Racing ER Coilovers \| Doran Control Arms

07-15-2011, 01:41 PM	#135 (permalink)
corner3garage The370Z.com Sponsor Join Date: Oct 2009 Location: Laguna Hills, CA Posts: 9,879 Drives: 240sx, 350z, 370z Rep Power: 34	according to mike bonanni at 370Z starts fuel starving at 7/8 tank. Surge tank would be good. __________________ Corner3motorsports.com

05-11-2011, 08:01 PM	#125 (permalink)
KORRUPT Base Member Join Date: Apr 2011 Location: Ottawa Posts: 75 Drives: 09 MB 370Z Rep Power: 14	Wish I would have seen this thread before tonight. Just had my 09 towed after buying it 3 weeks ago. Took and right turn onramp agressively, then accelerated hard to merge into traffic on an uphill straight with about 1/4 tank of gas. Apparently the " perfect storm ," the car completely died and as I was parked on an incline the car wouldn't start no matter how many times I tried. Oh well its at the dealership now I guess I'll let them check it out anyway just in case. Sucky!!

05-22-2011, 07:34 PM	#127 (permalink)
ArtVandaleigh Base Member Join Date: Jan 2009 Location: NE Ohio Posts: 227 Drives: 09 PW 370Z Rep Power: 675	Ha, glad I saw this thread... I had the same issue for the first time today doing a time trial event. I have not experienced this yet owning the car for over 2 1/2 years now, but it happened to be on a right hand sweeper, with oil temps around 255 and mid-rpm 3rd gear. Same fuel cut each time on the same corner... definitely a bummer though, I had well over a half tank too. I initially thought the car was going into limp mode, but after a few seconds of nothing, I could accelerate again. Odd that Nissan never caught this in testing?

05-22-2011, 08:23 PM	#128 (permalink)
cossie1600 A True Z Fanatic Join Date: Jun 2009 Location: californee way Posts: 5,380 Drives: 370, Leaf Rep Power: 29	they know, they judt dnt care to give a $hit

06-07-2011, 08:06 AM	#129 (permalink)
batboyvaj Base Member Join Date: Jun 2011 Location: mn Posts: 111 Drives: 2011 370z Rep Power: 13	has anyone with a 2011 been out to the track experienced this issue?

07-15-2011, 10:33 AM	#132 (permalink)
RCZ A True Z Fanatic Join Date: Nov 2008 Location: Miami Posts: 6,403 Drives: '09 370Z Rep Power: 1118	Hey guys, I dont know where this ended up, but I was talking to a fabricator yesterday who said he could make me a surge tank with twin racing Bosch pumps for near $1500 all said and done. That would completely fix this problem. Anyone interested?

07-15-2011, 01:04 PM	#134 (permalink)
cossie1600 A True Z Fanatic Join Date: Jun 2009 Location: californee way Posts: 5,380 Drives: 370, Leaf Rep Power: 29	How about an external surge tank, is there enough space underneath the car? $1500, i can buy tons of $5 gallon jug and a dedicated trailer...

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