When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.
I've searched and searched and theres "talk" about adding a fuel tank equalizer hose but has anyone actually done it? From what I've found our gas gauges are most accurate on first start up when fuel tanks are equalized so fuel gauge readings shouldn't be an issue. Any disadvantages to adding a lower crossover hose?
It's a 2004 twin turbo Z06 making 800+whp. Constantly having issues with the siphon jet system so I'd like to do away with it. I have no issue customizing the tanks, I just want to make sure I'm not over looking something and creating another problem. As long as the gauge reads correctly with both fuel level senders staying equal I think I should be good no?
Last edited by c5maniac2; Nov 20, 2015 at 08:54 PM.
St. Jude Donor '03-'04-'05-'06-'07-'08-'09-'10-'11-'12-'13
Originally Posted by c5maniac2
It's a 2004 twin turbo Z06 making 800+whp. Constantly having issues with the siphon jet system so I'd like to do away with it. I have no issue customizing the tanks, I just want to make sure I'm not over looking something and creating another problem. As long as the gauge reads correctly with both fuel level senders staying equal I think I should be good no?
You will have to do more than that.
That is why we did the fuel system the way we did on big power cars.
You would find almost that entire assembly inside of the fuel cell in the ALMS car pictured above. Running fuel cells in a normal street car however is a bit more costly than just adding in the fuel system like we did.
This is roughly what it looks like inside.
While a cross over at the bottom would help, it wouldn't solve it all.
Last edited by Anthony @ LGMotorsports; Nov 21, 2015 at 10:50 AM.
St. Jude Donor '03-'04-'05-'06-'07-'08-'09-'10-'11-'12-'13
Originally Posted by dadaroo
Is NASA missing some engine pump parts? Very impressive to say the least.
Mr. Sam
Of course each one of those has multi pumps for different reasons.
On the kit we sell the stock pump feeds the bigger tank which in turn supplies fuel to one of the Bosch pumps, the second Bosch is powered up when the car sees boost and you have both of them running.
On the ALMS car it actually had four pumps. A lift, or supply, pump that fed a separate chamber in the cell (reserve) which overflowed into another chamber (main) that each one of the Bosch pumps pulled from. So the car would run off the main pump until it was on fumes to which the driver switched to reserve and pulled from all four pumps at once to make it back to the pits if you were dragging a pit stop out for more than you thought.
Either way...yes to do the fuel system in these cars correctly for big power or for racing takes a bit of work, more so than just changing the fuel pump in the tank.
I wonder the same as the OP. Adding an equalizer would be easy. But does this create other problems? I've taken the jet pump out and cleaned it and the gauge problem hasn't returned for 6 months. It does seem like GM didn't think the system through. A -8an line connecting the two tanks would under normal driving keep the tanks close to equal. Just a thought from a guy who turns wrenches but hates the digital age. Rod
My fuel system works just fine for the power it makes and has been for years. ALL im after is removing the jet siphon and want to know if my gauge will read correctly. Does the ECM read each sender individually or combined?
My fuel system works just fine for the power it makes and has been for years. ALL im after is removing the jet siphon and want to know if my gauge will read correctly. Does the ECM read each sender individually or combined?
It reads combined. There are many operational descriptions on the Web. Google. One problem with a bottom equalizer is the fuel pump in the left tank. If you pull over to a curb that leans to the right the fuel will gravitate to the right tank and the vehicle may not restart after being parked. The Ferrari 308 suffers from this condition.
Does anyone have a wiring diagram specifically for a 2004 Z06? May help shed some light on the situation. I'm thinking if both senders run in series, the total voltage read by the PCM would be the same.
Fuel tank equalizer
