Fuel starvation, who else?

cossie1600

its probably a non issue unless you track the car

jaxxx

I do drive agressive at times and will be tracking about twice a year

nismo09

The problem is that it happens now on a full tank so unless I can get someone to hang off the side of the car with the fuel jugs I am still screwed!!!!

cossie1600

i find it odd you have pick up problem with full tank, maybe try replacing the pump and modify the pick up line, also i would assume stiffer suspension might help as you eliminate some of the lean

ChrisSlicks

With sticky tires and the wrong track configuration I've had it happen with 1 dot of fuel burned, but never with a completely full tank. I really don't understand how the stock setup can be this craptacular.

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nismo09

I have had the car to the dealer lying through my teeth telling him this is happening on the street and the system checks out perfectly. I drive a Nismo so you can’t get any stiffer suspension than that. The problem is that the pickup is at the top of the tank and not at the bottom so any splashing on tight right hand turns is going to cause it. I have seen some baffle configurations for RX7’s and the 350’s but not the 370’s. I have been chasing this for over a year and no luck. I am trying to find a solution without spending $1k plus for a pressurized secondary tank. Running the tank full every session worked for awhile but now I am going too fast for even that to work. Oh well. I will just keep looking.

RX7Club.com - View Single Post - Group Buy: Fuel Anti-Surge System

cossie1600

i am not sure what the 370 setup looks like, but if it was setup like the fc rx7 or miata. you should be able to extend the pickup tube lower into the bowl by getting a barb fitting and fuel hose. it should just be a 3/8 hose from the bottom of the pump

flashburn

I'm really surprised no one has figured out a somewhat elegant but cheap solution for this with our car.

edit: Or any solution short of having to send our tank to a company to have it modified.

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cossie1600

without tearing apart, its hard to see if it is a tank problem or a pump problem. since we cant really reach inside the tank, i still think a t fitting with a tube or something might work

nismo09

Here is a diagram of the fuel tank if it will help anyone. The problem as it has been explained to me is that the pickup is at the top of the tank and not the bottom. Any help is always appreciated.

172 Fuel Tank :: Fuel & Engine Control :: Genuine Nissan Parts :: 370Z Parts (Z34) 2009-2011 :: Nissan Parts, NISMO and Nissan Accessories - Courtesyparts.com

ChrisSlicks

From that diagram it looks like the pump is installed from the top of the tank, but extends down towards the bottom of the tank. It isn't very clear where the actual pickup is on the pump (appears integrated) and if it can be extended. Some kind of dual pickup with float's on each side would probably work. From the tank layout it would appear that it would be easy to configure dual pumps as well, but that would be more difficult to get working.

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cossie1600

do a search on 370z fuel pump replacement, i just saw it on my phone and i couldnt pinpoint the details. you can see where the pump is

kkruel55

Experienced fuel starvation at the track this Saturday; tank was only 1/3 down. Only happened on right hand turns. Anyone have a surge tank or dual pumps or another way to solve this?

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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.

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MightyBobo

Whatever happened w/ this, Travis?

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