01ssreda4

iTrader: (96)

You and our versions of "cursing someone out" seem to vastly differ At any rate, seems he is on the right track to getting it sorted out.

Racetronix

iTrader: (2)

To set the record straight here the outlet port of the module must be looped back into the return for this test to work.

The venturi will not function unless the fuel pressure is close to the integral regulator's factory pressure set point of 58PSI. The venturi system has a finite replenishment capacity so much of the return fuel must be reintroduced back into the bucket.

If the fuel volume exiting the bucket exceeds the combined volume of the return fuel + venturi/jet system + equalization check-valve the bucket will be sucked dry.

This is why people who use external regulators and set the fuel pressure too low or have motors which demand too much fuel will suck the bucket dry.

Customers have also been know to have:
- Leaks in the module's fuel tube
- Leaks in the regulator housing (properly seated)
- Fuel returned external to the bucket (not routed through factory regulator which passes through leg of module and back into the bucket)

01ssreda4

iTrader: (96)

What returns fuel back into the bucket, the regulator itself or the t fitting under the driver rear seat where the filter is? Or both?

Racetronix

iTrader: (2)

It is a loop with a branch to the front.
Outlet - T - Module return port - integral regulator - bucket
----------L - rail feed (engine)

tech@WS6store

iTrader: (2)

We had him loop it back afterward the first test but he didnt video that one. Same results.

01ssreda4

iTrader: (96)

Reason I asked was I'm plumbing my car with -8 for e85 and noticed the t fitting under the car and knew it was a return loop, however my new fpr has the return outlet actually on it. So I was just mentally comparing the two variations of the same type system.

Racetronix

iTrader: (2)

If you are using E85, do not use any of the factory lines or fittings.

MikeMs01TA

iTrader: (2)

Thanks for the info WS6Store and Racetronix! BTW, I found this other thread that has a cutaway of the fuel bucket for reference: https://ls1tech.com/forums/fueling-i...placement.html

01ssreda4

iTrader: (96)

Right, it's dash 8 ptfe line. But having to design the system from scratch had me mentally comparing the two out of curiosity.

tech@WS6store

iTrader: (2)

Racetronix does cary an entire kit with 8 feed 6 return, all fittings an new filter and adj fpr with rails also.

Lonnies Performance

iTrader: (16)

The venturi will not work with out sufficient backpressure on the system.
In a free flow situation like shown, the bucket will empty.

If you hold 58psi with a regulator & pump from the return of the regulator the venturi should work.

Also putting a pump in a bucket of fuel like shown is a good way to get an ambulance ride.
One spark from the alligator clip & you have a big fire on your hands.

tech@WS6store

iTrader: (2)

Adding a loop of fuel hose provides the restriction ie the regulator. Plus returns the fuel back to the module as well. (He added the loop later upon us telling him to like racetronix said as well just did not video, same results)

Liquid fuel doesnt burn or combust the fumes/vapor will of course, so they should be safe on that end, but always do it in an open area of course or with proper ventilation and make sure your leads are long enough and connect it to the battery side if just touching wires to the terminal. Also make sure to use a fused jumper to prevent damage to the pump.

It may be somewhat "redneck" or shade tree style, but short of cutting a trap door in the fuel tank, is really the only option.

We do offer cheap pigtails as do most local auto part stores so you are not stuck with using alligator clips inside the connector to make the connections and possibly cause an issue.

01ssreda4

iTrader: (96)

The liquid fuel would not burn, but an open bucket of gas surely would because of the massive amount of fumes that would be radiating off of it. Gas is a funny thing, you can put a cig out in the liquid but one live spark and boom, a small amount of gas can cause reverbs that you can feel in your chest. Pretty amazing and dangerous stuff.

G Atsma

Understatement of the year, and amazingly accurate!