I am surprised they didnt fix the oil temp by removing the gauge

^hmhmhmhmm


Phunk, keep up the good work man, we all appreciate it.

I've encountered this problem many times myself. It first started on a hard right hand on-ramp with an incline. I was at about 1/4tank, I starved the car so bad that it died. Couldn't get it re-started either.

Fuel gauge went completely to 0 dots, tow truck driver thought I had just ran it dry and was an idiot. After we got to Nissan, enough fuel had made its way back over to the other side that it started right up and I was at 1/4 tank again. (Only mods at this point was a tire upgrade to some 285up front and 305's in the rear)

Once I figured out the issue, I decided to do some testing. Turns out I could run into some hiccups on the on ramp with over 3/4ths a tank of fuel.

Add in some turbos, and now while Autocrossing I can get it on a sweeping right hand turn if I don't fill up every other lap. I initially thought it was my tune breaking up, until I decided to go get some more gas. Which solved the problem immediately. So below like 95% full I can make it happen.

I'm just going to end up going with an external tank and probably a return system. Any tips for that Phunk?

All I know is that it would piss me off if a civic blew by me because the Z was choking on air. I might do something crazy like sell the car and get an "S"!

last thing...
 

I completly agree with Phunk - the thing is, that the fuel starvation on 370z is too big and too sensitive. Something went wrong when design of fuel system was made. Thats why so many people encounter this problem. Top up and forget is the solution for weekend trackers, redesign is for daily trackers:)

In seriously thinking fuel cell now. It's about par for where I want to be anyways.

I'm seriously thinking this thread should just be closed as this 'fix' is very unlikely to ever materialize.

Once I have the extra $$ to finaly upgrade my fuel system ..
if the kit of Phunk is ready by the next 4 weeks
Im gonna take it

if not well I cannot wait any longer and will end up with Integrated Engineering Submerged 044 Billet Surge Tank WITH PUMP

Have you found someone to convert to a return system? Curious if you have any quotes on that.

Where do you plan on mounting? Inside the hatch, underneath where the stock muffler sits? I am all for this type of solution, but I cannot afford to have it in my hatch.

Me too. Which one? Ideas? I'm sick of the fuel starve issue. Has become even more of an issue for me with blower

I had a fuel starvation issue on turn 4 at Leguna Seca Monday. A more gradual but fast right hand turn. Very confusing. At first I thought I'd grabbed 6th gear, but it felt like I had hit some kind of rev limiter, I changed gears but that didn't help, then suddenly, through a left hand turn now, wham, the power was back. I was low on fuel, about a quarter tank. I should have paid more attention before I got back on the track.

im still undecided about the location , it will greatly depend once I have the unit in my hand with the fitting and everything...

has anyone had fuel starvation issues on a 2012? street or track? i didnt note year models as i read the thread, sorry

This affects all 370Zs.--the fuel tank design and pickups are the issue and they're the same for all 370Zs from 09-13.

Except the RC I guess.

This one right here.

Discovery Parts - Fuel Safe Complete Pro Cell Steel Container

Well, only my second HPDE event so I never thought this would happen to me, but yep fuel starve at a bit less than 3/4 tank. Damn even the newbies can get this car to fuel starve!

^ yup, it's not hard on the track, even on street tires. My rule of thumb now is to top off the tank every other session at HPDE's.

Plans on mounting? I would like to keep fuel outside interior of car.

It's very common practice and safe to install in the inside of the car. I've have briefly discussed this with a shop of cutting out the rear section bracing that mounts from strut tower to tower, put a brace up top and mount the fuel cell directly over the rear axle where weight needs to be anyways.

Not enough room forward of that bracing, up against it, with all the interior gone?

Must be nice. I have to top off after every session. :shakes head:

Yeah I have had race cars but I hate having fuel inside the car. Inevibly you will spill small amounts when working on car etc. Would you fuel by opening rear hatch? Even bing careful you will likely spill small amounts. Interiors tend to grab that gas smell too. if my car was a dedicated track car I probably wouldnt care but I will drive with windows closed on streets occasionally. I have had enough vintage racers that I like my street cars to be gas smell free. LOL!

I'd imagine he'll run a proper fuel filler hose out to the stock gas door location. Other than when working on the fuel system itself, it should be sealed all the time in the interior and not leaking/splashing/etc :).

I just want to say what a great product Phunk has made. It's helped me tremendously...

...in my wildest fantasies. The only thing worse than having no good solution to a problem is having someone dangle magical carrots in front of you and never deliver.

Ridiculous.

Well Travis said his guys are on to something. Or fuel cell and be done with it

No soup for you!!! ....lol

Maybe it's just me but on my 2012 I don't hit it until I get to 1/2 tank. Been tracking at bigwillowspring and button so there's tons of long right hard turns.

FYI....we removed the OEM saddle tanks and replaced it with our own Doran design fuel cell and it is a return system.
Dwnshift

So, on the first page of this thread (2+ years ago) someone suggested fuel cell foam. Has anyone tried/investigated filling the left side of the tank with fuel cell foam, or creating a barrier in the middle of the tank with fuel cell foam?

Don't quote me but I believe a member here (TravisJB) had done this. But only mild results from it. Can't remember.

Correct. My car had a combination of fuel cell foam and pickup pumps on drivers side and rear drivers side of tank.

The foam will control 'sloshing'... but I believe it will not control the fluid angle that occurs in a sustained right hand turn. Foam is not a solution to our problem but may help just a bit in certain situations.

I'm hoping that Doug at Z Fever gets on here soon to clarify how his fix is coming along.

^very interested in this. Travis were you also running the second fuel pump from the drivers side to feed the pot on the passengers side? I'd so how did that work?

Yes, I had a second and third fuel pump that fed back to the OEM pump. I pulled those out for safety reasons... they were getting hot when not soaked in fuel, ie when turning left and I didn't want to risk it... the other problem was that those secondary fuel pumps were not mounted they were just held down by the foam... they were bumping around a lot... the solution z fever is putting together will use a second pump but it will be soaked at all times I understand, and so less risk. The secondary pump will mount in the secondary access panel and will be integrated with an in-tank swirl pot... one simple unit that then feeds back over to the OEM pump, as I understand it.

In any event, I'm going to refrain from discussing it further until Doug can come in here and explain for himself. It's his product, not mine.

Ok sounds great and simple.

Anyone know if it's possible to simply swap the OEM pump and secondary sender from side to side? Won't fix the issue per se, but it would mitigate it due to the fact that the vast majority of tracks run clockwise.

the only certain fix that I know of is what jayfightmoves did and its a little extreme, plus you lose the fuel gauge. He took the tank out, cut it in half and welded the one side shut and just put half a tank in the car.

^ damn, not a bad idea for my car... but wait, what materials is our tank made out of?

aluminum, I think.

never say never.