Fuel starvation, who else?

ban25 · 02-23-2010, 04:00 PM

Quote:

Originally Posted by ChrisSlicks

As long as you're not trying to re-create any movie scenes by accelerating full throttle up the hill as you fly over the cross roads I think you'll be just fine. And just to be safe fill the tank before it reaches 1/4.

Nah, wrong car for that.

Ok, thanks!

travisjb · 02-23-2010, 12:08 AM

No

ZForce · 02-23-2010, 02:22 AM

None here and I drive Hwy 49 near Foresthill, CA which has a steep incline and switchbacks.

JB-370z · 02-27-2010, 06:47 PM

This happend to me at the track when I was drifting. BAM the car shuts off with about a quarter tank. It happend to me on a left turn. The car started right back up. Scared th holly hell outa me. What can I buy to fix this issue??

teejnut · 03-14-2010, 12:29 PM

Saw this problem at Willow Springs (Big Track) after the #2 sweeper. The throttle would not respond, started happening when I had less then 3/5 of a tank.

B1nks · 04-11-2010, 01:32 PM

Anyone know if someone is working on a replacement tank with better baffling or something for this issue ?

Valentino · 04-11-2010, 05:28 PM

fuel system upgrades

it's been 20 days since he last updated his thread.

I would give him another 10 days before asking for updates, and maybe pictures (if possible).

travisjb · 04-11-2010, 05:31 PM

Quote:

Originally Posted by Valentino

fuel system upgrades

it's been 20 days since he last updated his thread. I would give him another 10 days before asking for updates, and maybe pictures (if possible).

darn, hadn't even seen that... will follow along, sounds like he's on the right track

travisjb · 04-11-2010, 05:29 PM

this is a big priority and I'm surprised we don't have a vendor stepping up yet... four options

1. traditional external swirl pot
2. 'internal swirl pot' that was discussed here a couple mos ago
3. internal baffling
4. complete fuel system replacement, ie fuel cell, new pumps lines, etc

Option 4 may be necessary for those doing real racing or TT setups . Option 3 should be the cheapest but no idea how effective this will be when the tank gets low. I'm planning to give this a try. Basically a coffee can with holes that surrounds the fuel pump in the tank and partially resists flow away from the pump in corners. Option 2 should be the effective but more expensive and would require some engineering specific to this car.

B1nks · 04-11-2010, 07:58 PM

Quote:

Originally Posted by travisjb

this is a big priority and I'm surprised we don't have a vendor stepping up yet... four options

1. traditional external swirl pot
2. 'internal swirl pot' that was discussed here a couple mos ago
3. internal baffling
4. complete fuel system replacement, ie fuel cell, new pumps lines, etc

Option 4 may be necessary for those doing real racing or TT setups . Option 3 should be the cheapest but no idea how effective this will be when the tank gets low. I'm planning to give this a try. Basically a coffee can with holes that surrounds the fuel pump in the tank and partially resists flow away from the pump in corners. Option 2 should be the effective but more expensive and would require some engineering specific to this car.

I have plans for TT, though a full build will take some time, so I hope my only option is #4 but for #1, would it fit in my spare tire area ? I don't plan on putting a sub in so that's a possibility. I wish #3 would work and the thing with the coffee can would it resist both ways really ? What I mean is, if it kept the fuel from flowing away from the pump wouldn't it also partially resist flow to the pump as well ?

PS: Thanks for the link Valentino !

travisjb · 04-11-2010, 09:44 PM

Quote:

Originally Posted by B1nks

...if it kept the fuel from flowing away from the pump wouldn't it also partially resist flow to the pump as well ?

yes, but the idea is that there are extended periods of time between lateral loading where it could fill back up... and you could also pattern the holes so that it resists flow out more than flow in... imagine the angle of the fuel in a hard right hand corner vs straight line braking / accel

pgrmstr · 04-12-2010, 10:21 AM

I think I experienced this for the first time this weekend at an autox. Oil temps were starting off at 220 before my run, but were 245 at the end of the run. I was getting some momentary "cut outs" mid way through the course and was thinking it was limp mode, but having read this post this morning, pretty sure I was getting fuel starvation. The point of cutout was at the turn around of the course, a sweeping uphill right hander...and it cut out on two separate runs in the same place. I was running about 1/2 tank of fuel so looks like people are getting starvation even between 1/2 and 3/4 so looks like I'll need to run 3/4 to full to be safe.

That's a fair amount of extra weight to have though...

travisjb · 04-12-2010, 10:48 AM

exactly... this will be the best weight reduction mod we can make, once we solve it

import111 · 05-29-2010, 11:14 AM

Anyone have new news on this subject?

Zxces50 · 06-26-2010, 06:07 PM

Did Monticello yesterday- last session died on right hander- clearly fuel starvation- could not re-start- course red flagged and I towed off- disconnected battery and restarted fine- like nothing ever happened- about 1-2 dots below half tank. Oddly 2010 Nismo was in group after me he had exact same problem but managed to get off track - we each had about same # laps and both gauges just about half full- other than fuel starvation all else good- great track

02-23-2010, 12:08 AM	#2 (permalink)
travisjb A True Z Fanatic Join Date: Jan 2009 Location: GSO Posts: 2,803 Drives: VIR Rep Power: 189	No __________________ 2009 370Z #104 For Sale

02-27-2010, 06:47 PM	#4 (permalink)
JB-370z A True Z Fanatic Join Date: Apr 2009 Location: Houston, Tx Posts: 1,859 Drives: Stage 2 Twin Turbos Rep Power: 20	This happend to me at the track when I was drifting. BAM the car shuts off with about a quarter tank. It happend to me on a left turn. The car started right back up. Scared th holly hell outa me. What can I buy to fix this issue?? __________________ ll Baker Tuning ll GTM ll Powerhouse Amuse ll HKS ll Up-Rev ll iForged ll AP Racing ll Pioneer ll SPL ll Bride ll Top Secret ll OS Giken ll GTM Stage 2 Twin Turboed 370z (First in Texas, Thanks To Baker Tuning)

03-14-2010, 12:29 PM	#5 (permalink)
teejnut Base Member Join Date: Sep 2009 Location: Burbank, CA Posts: 206 Drives: 09 Z34 Sport/6MT Rep Power: 16	Saw this problem at Willow Springs (Big Track) after the #2 sweeper. The throttle would not respond, started happening when I had less then 3/5 of a tank. __________________ \|KW v3\|SSR Type F\|Invidia\|Berk\|Stillen\|Kenwood/Focal/Image Dynamics/Alpine\|

04-11-2010, 05:28 PM	#7 (permalink)
Valentino Enthusiast Member Join Date: Jan 2009 Location: RaceTrack Posts: 349 Drives: SOLD 09,370z,M6 Rep Power: 306	fuel system upgrades it's been 20 days since he last updated his thread. I would give him another 10 days before asking for updates, and maybe pictures (if possible). __________________ Lou Fusz Nissan \| KW V3 \| SPL rear camber and toe bolt \| OS Giken LSD \| Nismo Diff cover \| Engine Oil cooler \| F.I. TDX Cat Back 18" Resonators \| F.I. Resonated Test Pipes \| Injen cold air intake \| COBB AccessPORT \| JWT Clutch Flywheel \| Last edited by Valentino; 04-11-2010 at 05:32 PM.

04-11-2010, 05:29 PM	#9 (permalink)
travisjb A True Z Fanatic Join Date: Jan 2009 Location: GSO Posts: 2,803 Drives: VIR Rep Power: 189	this is a big priority and I'm surprised we don't have a vendor stepping up yet... four options 1. traditional external swirl pot 2. 'internal swirl pot' that was discussed here a couple mos ago 3. internal baffling 4. complete fuel system replacement, ie fuel cell, new pumps lines, etc Option 4 may be necessary for those doing real racing or TT setups . Option 3 should be the cheapest but no idea how effective this will be when the tank gets low. I'm planning to give this a try. Basically a coffee can with holes that surrounds the fuel pump in the tank and partially resists flow away from the pump in corners. Option 2 should be the effective but more expensive and would require some engineering specific to this car. __________________ 2009 370Z #104 For Sale

02-23-2010, 02:22 AM	#3 (permalink)
ZForce A True Z Fanatic Join Date: Jul 2009 Location: Roseville, CA Posts: 2,359 Drives: 09 370Z Tour + Sport Rep Power: 22	None here and I drive Hwy 49 near Foresthill, CA which has a steep incline and switchbacks.

04-11-2010, 01:32 PM	#6 (permalink)
B1nks Track Member Join Date: Apr 2009 Location: Houston,Tx Posts: 721 Drives: 2009 370Z Base 6MT Rep Power: 508	Anyone know if someone is working on a replacement tank with better baffling or something for this issue ?

04-12-2010, 10:21 AM	#12 (permalink)
pgrmstr Base Member Join Date: Mar 2009 Location: PA Posts: 131 Drives: 09 BS 370z Sport 6MT Rep Power: 17	I think I experienced this for the first time this weekend at an autox. Oil temps were starting off at 220 before my run, but were 245 at the end of the run. I was getting some momentary "cut outs" mid way through the course and was thinking it was limp mode, but having read this post this morning, pretty sure I was getting fuel starvation. The point of cutout was at the turn around of the course, a sweeping uphill right hander...and it cut out on two separate runs in the same place. I was running about 1/2 tank of fuel so looks like people are getting starvation even between 1/2 and 3/4 so looks like I'll need to run 3/4 to full to be safe. That's a fair amount of extra weight to have though...

04-12-2010, 10:48 AM	#13 (permalink)
travisjb A True Z Fanatic Join Date: Jan 2009 Location: GSO Posts: 2,803 Drives: VIR Rep Power: 189	exactly... this will be the best weight reduction mod we can make, once we solve it __________________ 2009 370Z #104 For Sale

05-29-2010, 11:14 AM	#14 (permalink)
import111 Track Member Join Date: Feb 2009 Location: Tucson, AZ. Posts: 622 Drives: 09 Nissan 370Z Rep Power: 192	Anyone have new news on this subject?

06-26-2010, 06:07 PM	#15 (permalink)
Zxces50 Base Member Join Date: Jan 2009 Location: Boston, MA Posts: 208 Drives: 15 C7 Stingray Z51 Rep Power: 17	Did Monticello yesterday- last session died on right hander- clearly fuel starvation- could not re-start- course red flagged and I towed off- disconnected battery and restarted fine- like nothing ever happened- about 1-2 dots below half tank. Oddly 2010 Nismo was in group after me he had exact same problem but managed to get off track - we each had about same # laps and both gauges just about half full- other than fuel starvation all else good- great track

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