Fuel Starvation Control Product

phunk

The fuel level you were at was well into the fuel starvation risk area. Basically, once the gauge no longer reads topped off, you are at risk, and the risk increases the lower you go.

you often will not realize that you are in the middle of fuel starvation while in the right hand turn, and then you will encounter it as soon as you go to give it gas. it feels as if the gas peddle is not connected to anything because the trans is in gear, the engine is spinning, but it is not responding to giving it gas. at this point, the engine is only spinning because you are in gear, if you took it out of gear, the engine will die unless the fuel pump happens to grab some fuel as youre letting off.

when you make the hard or long right, the fuel sloshes over to the drivers side of the tank. If the turn was aggressive enough, you can get nearly all the fuel to go over there. so even though you have straightened out after the turn... most the fuel is over on the other side of the tank, and when you go to give it gas there is such a little amount that the pump cannot meet the engines needs.

it takes the system time to recover the fuel from over there. there is a little siphon that is powered by a venturi effect in the fuel leaving the fuel pressure regulator. it is constantly, and slowly, transferring fuel from the driver side to the passenger side where the pump resides. since it is required that the fuel pressure regulator be allowing fuel to bypass, if you are even low on fuel pressure, the siphon will die. this means you can actually transfer all the fuel to the other side, have the engine die, and there will be nothing you can do (short of adding more fuel into the tank) to get the fuel back to the passenger side. the car can actually be stuck on the side of the road until you bring it gas.

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phunk

Shamu forgot to mention, my product should add in the area of 5#. Ill give you exact weight tomorrow. It's minimal and of course is extremely countered by the weight savings in fuel quantity

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Mike

Shamu,
I have gone down to bone dry with no issues. I don't see how it can affect fuel air ratio, its just another pump on the other side of the tank. The fuel pump doesn't meter fuel to the engine.

threeseventy, I haven't checked times for that. All of my times are pretty consistent with full or empty tank though.

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NISSAN: 75 280Z / 86 300ZX GLL /87 Sentra SE / 03 350Z / 23 Z
Porsche: 93 968 / 23 Macan GTS / 93 968

DR_

I could have really used it this weekend at CoTA. I began fuel starving 12 minutes into a 25 minute session. What is worse is that I was starving at three different corners by the end of the session. This will be my next modification!!

nismo09

I hear you brother - I started starving in turns 16/17/18 after 2 laps on a full tank. When the rear end popped up it was hold on for dear life. Thank god that track is wide and smooth.

O&G

how does a surge tank / extra pump affect A/F ratio?

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O&G's Build/Journal <---(1st lowmount single turbo treeseventy)
Built Engine Thread
2011 F-250 Build/Journal

phunk

Reconfiguration of a fuel pump setup could only change A/F ratios if the new pump has an output that is too much for the re-used regulator and return system to handle. In the configuration that we sell this product, it uses a 255lph pump, which the OEM regulator is tested and proven to be able to keep within specification.

This product CAN be upgraded to much higher LPH output for forced induction cars, and if doing that, it will require additional modifications to the fuel system to be able to regulate fuel pressure properly.

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bmcd308

Keeps it from going to infinity unintentionally.

Rusty

In simple terms. Without it. Fuel moves away from the pump. Pump starts to suck air. A/F goes lean. Motor shuts down.

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浪人 - 殺し屋
"The Difficult Anytime, The Impossible By Appointment Only"
http://www.the370z.com/members-370z-...o-journal.html

O&G

Have yall thought about designing fuel rails to go with your VHR return system? I know the VHR rails are bigger than the DE/HR rails but not too sure at what power level they would need to be changed. I had the CJM full return system on my TT VQDE and loved it. Also, whats your fuel pressure look like on your current TT e85 build? Sorry to swing it off subject a bit...

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O&G's Build/Journal <---(1st lowmount single turbo treeseventy)
Built Engine Thread
2011 F-250 Build/Journal

phunk

We already have VHR rails. They are currently out of stock, but we have made them and sold them. They dont sell much because the stock rails and fuel system can keep up with the stock engine.

My fuel pressure is completely stock, and so is my fuel system. I just have injectors and CJM fuel pump install kit with an Aeromotive 340

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wstar

Fedex just dropped mine off today, thanks Charles



Unfortunately given I'm swamped with move-in stuff on a new house, and my next event is a week away, I'll have to wait until after that event to install and test. Feels good just having it here ready to go though

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7AT Track Car!
Journal thread / Car setup details

phunk

glad it has arrived safe and sound

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SPOHN

Awesome. ^

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Mike

Nissan wouldn't even know about it. I doubt the dealer is going to tear out the interior and inspect the gas tank if your motor blows.

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NISSAN: 75 280Z / 86 300ZX GLL /87 Sentra SE / 03 350Z / 23 Z
Porsche: 93 968 / 23 Macan GTS / 93 968