Fuel starvation, who else?

phunk

when I first wanted to build a surge can setup for this car... my original idea as to build an external style surge can and plumb it as if it were external, but to simply have it hang inside the gas tank on the drivers side... I would have only had to add a level sensor mount for the stock level sensor over there, no big deal, and have an internal mount for a good fuel pump and a connector to get the wiring into the pump and level sensor. This would be the easiest solution.

What I ran into, was that I couldnt think of a great way to get the hoses over to it from the passenger side. I didnt want to go under the car and over the driveshaft... I didnt want to go through the cabin... and I was unable to fish any lines inbetween the gas tank and the chassis above it to have the lines laying across the top of the tank.. and there was no way I was going to make it so you had to drop the tank to do it.

that is how we ended up with that working prototype that mounts over there and has all the plumbing inside the tank.

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phunk

also, another thing you need to keep in mind about an external surge can is pressure regulation.

stock, the fuel pressure is regulated right off the filter housing that the OEM pump feeds.

If you run an external surge can, you are now feeding the surge can off this OEM assembly, and the pressure is regulated to 52psi there, but of course it would never build pressure because its pumping right into the surge can which will have an overflow back to the tank. Now you have a pump feeding the engine from the surge can, and a regulator will have to be added.

what our working prototype thats in that car is doing... part of the reason there are so many hoses going back and forth inside the tank, is because we have the surge cans pump feeding the stock filter housing with regulator, then out the stock port at the top. this was one advantage to doing all the plumbing inside the tank, we could reuse the stock regulator. To accomplish this with an external surge can would be having a T off the pressure output from the surge cans pump that goes back into the stock assembly to the filter housing and regulator. but now only the regulator fuel is filtered, and you will have to add an external filter after the surge can's pump.

i mean i could really go on for a good hour to two about the various configurations and different ways to accomplish a fuel surge solution in this car.

i can definitely say that we ended up deciding on our final solution for a reason, because everything else was just so hokey and unrefined and overall questionable. we figured, rather than band-aid and hack the problem away... lets just kill it right at the source.

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clintfocus

thanks for the explanations, still fully ready to purchase when done

stratburst

I don't understand how Nissan has been seemingly ignoring the issue. It's clearly a design flaw that could be potentially very dangerous even on the street.

sig11

I still don't know how people get this on the street...

stratburst

Several people on this forum have reported experiencing the issue. Usually on a on ramp with an extended curve.

wstar

Yeah that seems odd to me too, getting it on the street. But maybe they're really low on gas when they do.

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spearfish25

It's not that tough to have happen. Have less than 1/2 tank (even higher levels if you're a more advanced driver) and try to take a right hand clover leaf onto a highway in a 'sporting' style. It'll cut out.

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2013 Cadillac V-Wagon, RIP Z

sig11

I guess I've never been on a ramp that was long and smooth enough. :P

phunk

its definitely no problem to recreate the issue on the street, you just have to take a right-hander harder than most guys are willing to push on the street. i take similar routes every day and i only push it hard on turns that i am familiar with to reduce the chances of a wreck due to dusty roads or uneven surfaces upsetting the car. In the turns where I am comfortable and confident, I can pretty much make it happen on command. I love turning left because I can safely just nail the throttle when I see fit and the toyo r888s and 500rwhp feel awesome on exit!! where the same technique in a right hander would leave me stuttering and put'ing away and possibly with a damaged engine!

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MightyBobo

I've been able to get it on an off-ramp before. It wasnt even a long one - just took it hard.

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I don't own a car anymore.

cossie1600

You don't even have to take it hard, just a long sweeper will get you fuel starvation. I got it to kick on with a trailer in the back, not difficult at all.

_ace_

I've done it on the street on a certain very long right corner that exits the freeway. I have to be getting low on fuel.

With 1/8th tank I got fuel starvation going straight up a mountain road--no curve at all. I simply could not climb. I rolled the car around the other way, started it, then drove to the gas station. After filling up it had no issues at all.

travisjb

going upgradient makes it worse

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2009 370Z #104
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threeseventy

And/or an upgradient onramp with some ahole M3 with Rcomps (dude its not track day!) on your *** trying to prove his $80k moot point.