Fuel starvation, who else?

Zeto

1) That's not very smart.

2) That just lessens the issue since you have a low grip on your tire. (since you say that they are on wires)

3. Get some stickier tires and hit the track. That is the true test.

ResIpsa

Check this out!

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ChrisSlicks

I'd say that is almost worn out.

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Hotchkis ARB | Stillen CAI | Art Pipes | Berk CBE | Stillen AP Racing Brakes | AE Performance Oil Cooler | BC Racing ER Coilovers | Doran Control Arms

Zeto

What kind of tires?

phunk

it sounds like you are talking about an entirely separate issue.

i run my Z until there are no dots of gas left just about every single tank. the car runs and drives fine.

the fuel starvation issue that this particular thread is discussing is unrelated to the calibration of the fuel level sending units and their accuracy.

we are all talking about fuel placement control inside the gas tank. when making a hard right, the gasoline shifts to the left side of the tank. the fuel pump cannot draw in the fuel momentarily until it settles and also siphons some over, so the engine starves of fuel and cuts power for a few seconds. the lower your fuel level, the more prone to this issue you become.

in some cases it can be worse. if you manage to relocate nearly every last bit of your fuel over to the left side of the tank (you could even have a gallon or two over there), the car is dead and will not run until you put more gas in it. that is because the siphon that pulls the fuel from the left side of the tank to the right side (this gas tank is divided in half by the driveshaft, shaped like saddle-bags) is a venturi that is powered by the fuel dumped out from the fuel pressure regulator inside the fuel pump sending unit. if the pump isnt pumping fuel, then the venturi dies, and there is no more siphoning action.

this can leave you stranded on the side of the road, it happened to me once. with 1/4 tank of gas according to the gauge.

no replacement sending units from nissan are going to fix this issue. this is not actually a concern of theirs. nearly all factory vehicles have this issue, in some cars it worse than others. ours is pretty bad due to some of the specifics of our fuel system layout.

but alas, i have the answer.

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Synack

I've definitely had this problem at the track, drifting. More than a quarter tank and it just dies. No fun.



I was at the track on my Hankook's and after the session the tires had wires coming out, because I used every damn bit of tread. I have more tires on my porch.

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NO LONGER OWNS A 370
Turbo FR-S

spearfish25

RE-11 slicks. Cool.

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2013 Cadillac V-Wagon, RIP Z

WWJD

After I read through 16 pages, it doesn't seem like there's any plug and play solution available yet? I bet whoever makes it first and put in market will sell a bunch in no time.
The Z had this problem at Buttonwillow and Big willow even on stock shitty tires. Damn it...

Elysium

So I've been exchanging pm's with Phunk and expressing interest to be one of the first to get his new setup. How many others are interested?

1. Elysium

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2010 370Z stillen supercharged.....will be missed

ChrisSlicks

I'm definitely interested as long as there isn't too much added weight.

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phunk

Chris: I put most of it on the scale and then tossed in some extras to attempt to simulate the components that arent ready to be weighed themselves yet. It looks like we will be 4-7 pounds. I believe under 5, but leaving room for the unknown.

9 Gallons down is pretty good, quite a length from stock. Thats about 10 left in the tank. We will see how far our product lets everyone go. As with anything, its not an easy comparison as every car and track is different. The more aggressive the car and the more wild the track, the more it will be working this product. Only time will tell what limits people find. Our hope is to get just about everyone to a pretty low tank level. I like to stay modest on our expectations and then surpass, rather than make promises and fall short. I am pretty good at this stuff, so I hope this one is another home run. We are very close now to track testing of the pre-production unit.

One thing that people DO need to keep in mind, is their poor stock fuel pump assembly. Our product targets resolving fuel pressure starvation to the engine. It DOES have a built-in secondary function that helps put more fuel back to the stock fuel pump assembly to keep that pump wet, but its focus is on the engine and only whats left over goes back to the stock pump assembly. Fuel pumps are not a fan of running dry. Starvation to the stock fuel pump assembly could shorten the life span of the factory pump. This is, of course, a relevent issue with any compariable type of surge solution for any vehicle. Its more just a heads up rather than a prediction of impending doom.

We are working on pricing more today. I am not sure when I quoted who what.. but we have gone through 3 different styles of solutions before picking this one, all of which have gone thru a few versions... so I cant recall at what point I estimated. I do know that the depth and refinement we have decided to take to the final product is going to make it cost a little more than we originally anticipated. We are going to build a little bit of detail into some of the "installation" components as well to try and make this as easy as possible to install correctly.. because there is room for error in making fuel line connections wrong, and in any combination other than "correct", will result in an unhappy driver.

We wont sell it if it doesnt!

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ChrisSlicks

Sounds good, keep us updated.

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Hotchkis ARB | Stillen CAI | Art Pipes | Berk CBE | Stillen AP Racing Brakes | AE Performance Oil Cooler | BC Racing ER Coilovers | Doran Control Arms

travisjb

you are dead on here... at the track this weekend, the cheap OEM fuel sending unit on my car basically broke in half and sent the pump flying around inside my tank... and of course all the lines got pulled lose, and I lost all fuel delivery...

It is possible that there were errors when the assembly was reinstalled in my vehicle that contributed to the structural failure of the sending unit... also possible that it is a cheap plastic part and doesn't hold up to g-loads and the mass connected to it

hopefully you are including some reinforcement to the strength of the sending unit assembly

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2009 370Z #104
*For Sale*

zinistr

I am ready...assuming the cost isn't astronomical.

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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

nismo09

Count me in.