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?

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

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 :)

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

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!!

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.

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?

they know, they judt dnt care to give a $hit

has anyone with a 2011 been out to the track experienced this issue?

I doubt they've fixed the problem in the 2011's.

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...

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?

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.

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...

according to mike bonanni at 370Z starts fuel starving at 7/8 tank. Surge tank would be good.

question is, where can you put it? who is stupid enough to run fuel lines into the cabin

Hey guys, I've had this problem about 4 times now. Ran out of gas turning a corner. Mine did it at 1/4 of a tank though. I just had the dealer install a brand new 'Fuel Sending Unit' and a 'Sub Sending Unit' under warranty. The whole thing costs $400 without warranty. They also calibrated my gas tank to properly read gas levels. I don't know what they did there. But in doing this, my car tells me EXACTLY how much fuel I have left now. I even decided to run it down til the tank told me I had "---" miles left and I took a hard turn and it seemed to be okay. Granted I rarely get it that low, I just wanted to test it out. If you are still having problems, give this a try. I haven't tracked my car yet but it's way better driving on roads now.

Yeah, but I've gotten to where I can't run longer than fifteen minute sessions before it happens to me now.

It all depends on the tires. On street tires you are okay for 20 minutes, on race tires the extra G loads pushes even more fuel away so it happens sooner.

15 minutes was on AD08s at VIR and about 20 minutes at Barber

If I recall correctly, I started getting fuel cut 2-3 laps into my second session at VIR. I am on stock suspension, maybe that helps as I can't pull the same G's.

With the in-tank pump setup from nothotwire, I am able to run deep into my third 15-20 min session now before I get any cut... with hoosier slicks

I wish that kit was available for you guys!

Yeah, I never heard back from him, but I'm talking to others about a solution

I am very happy right now.... we have this issue taken care of... we had a project in the works for a really long time, and then just the other day had a total stroke of genius on an even better way to solve the problem. within a couple weeks i will have it all ready for you guys with test data. it is awesome, its almost plug and play, and its all concealed within the factory fuel tank.

actually planning to build 4-5 more of them this weekend, so could be available as early as next week

awesome ! :tiphat::tup:

Sweet! Paypal at the ready!

why dont they just do something similar to aircraft and make the tube exiting the pipe have a venturi effect and have a low pressure high velocity point in the tube leading to an extra pump that is connected to the fuel tank that will increase the chance of fuel starvation and maybe save a little on weight depending on the size of the suction tube. idk just a thought.

i cant make any sense at all of what you just wrote. i want some of what youre smoking :)

:iagree: Punctuation goes a long way. :tup:

I thought my typing was bad....

lol well luckily we developed a solution that didnt require having to decode that post. i want to give more details but honestly want to protect the product until its available to ship. but if all goes well with the test fit, i think you guys will be absolutely in love with it. i dont even like posting about unready products anymore because there is so much room for things to have to be changed before production, but i am rather excited about this one. i dont even care if anyone else is working on a solution, i know we have the best one right here! just gotta get it all pretty and ready!

we have been laying low in the 370z community, but have done endless business for years in the Z33 world and older platforms in the past. we have been in the middle of moving across our building and setting up some new stuff and finishing up some projects, and we hope to be able to debut this product as an introduction of our business to the Z34 community. perhaps mention some other trick components we have in the works, and maybe show off our twin turbo 370z... if I dont blow it up first trying to finish up the tuning!!! (im new to UPREV Osirus software lol, my 350z ran on a FCON).

and yes i know my punctuation sucks too! too many years on forums have destroyed my proper english writing!

Same here Mike. On AD08's at TWS it happens on the 2nd lap with a full tank. :shakes head:

Ok, where do I sign up?????? :happydance:

I am tracking this weekend and I know it is going to be brutal. :shakes head:

Same here. At least I have a trailer now so I'll be bringing lots of fuel cans in the future but running without the extra weight all the time would be really really nice. Each gallon of gas is 6 pounds, running an unnecessary 12 gallons is 72 pounds. Thankfully it is in the rear and low.

Had to rebuild the prototype to accomodate a few things. Its pretty much done, was supposed to finish today but for sure will be done tomorrow afternoon. Then it has to go through some testing. I cant sell them until I verify the entire theory of the whole thing works, although I am very confident in it. We have already thought of several improvements over this prototype as well, so we started CAD designing an even better model today... after the prototype tests the theory, we are going to construct the final products off the new CAD design. Its coming out really awesome! I hope to have the retail model ready ASAP.

Due to limited space and access inside the gas tank, installation is rather tedious. Part of the product has to be assembled inside the tank since the completed assembly would not be able to pass through the opening. I would probably want to give someone 2-3 evenings after work to get it all squared away. An experienced tech could probably sort it out in one evening.

Very cool. Look forward to the results of your testing.

phunk, my setup consists of both in-tank baffling and in-tank pumps... there are two pumps in fact, and they feed to the main fuel pump. one at the rear, one on the drivers side. in addition there is baffling to help control the fuel from rolling around.

two things to note if you are going this route:

1) wiring! you need to use wiring that is specific to operation while submersed in fuel. if there is a short, can be bad news!

2) operation of the fuel level gauge. for whatever reason, mine no longer works now that i have this setup... please try to keep it operational in your kit

also, price... if you value price this, you can probably get people to pay you a lot for it given no one else is offering a solution to this problem... don't do that - it'll not help your rep long-term... the bill of materials for my kit is about $500, add in a reasonable margin and that's your target :)

good luck

travis: no worries about us there, fuel system design and products have been a focus of mine and our company for several years. Fuel level gauge is fully functional. Our material cost is quite a bit under yours, but we have expensive machinary manufacturing the components and a dealer network to support. While we have taken an entirely different approach to this product than we have ever seen done before, its substance is comparable to products existing on the market for other vehicles. We have found, even with ours being a bit more complex, our price will not be quite as high.

LoL!
-Phunk@CJM is an Icon within the z33 community.. He knows the "runnin's", and is quite successful at what he does.
(IIRC, he holds the stock block, TT, whp record for the z33) - he must be doing something right! :tup: