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Nissan 370Z Forum (http://www.the370z.com/)
-   Track / Autocross / Drifting / Dragstrip (http://www.the370z.com/track-autocross-drifting-dragstrip/)
-   -   Fuel starvation, who else? (http://www.the370z.com/track-autocross-drifting-dragstrip/9674-fuel-starvation-who-else.html)

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 (Post 1097214)
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 (Post 1097807)
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 (Post 1156012)
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 (Post 1104938)
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.


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