3 gallons or less in your tank!!

[DMCTurbo]

The fuel pick-up lines in the tank do not connect to the pump. They dump into the cup the pump sits in.
It works on the scavage system dumping fuel into the pump cup and them the pump sucks the fuel out of the cup to the engine.
This cup can be sucked dry from the pump.
Re locating the fuel return line to dump into this cup helps ensure their is no starvation of fuel from the pump.

Great explanation.

 

[0degC]

Yamaha grommet and black elbow.
Also purchased 6 feet of 1/4" fuel injection hose and three clamps. I just cut the old fuel return line at the top of the tank and put a bolt in it with a clamp around it.
View attachment 159044

This is where the fuel return should go for sure. I am likely overthinking this but are you concerned with fuel leaking with this setup? I know the grommet is used at top of tank. Just wondering if this worked ok for you? No leaks?

 

[1nc 2000]

This is where the fuel return should go for sure. I am likely overthinking this but are you concerned with fuel leaking with this setup? I know the grommet is used at top of tank. Just wondering if this worked ok for you? No leaks?

I have ran one full season like this and no leaks.
Others in the beginning of this thread have been running it also.
Just make the hole the same size as the original location and its quite difficult to install the elbow thru the grommet.

 

[jonlafon1]

I know you guys are speaking of the pick ups and location. One thing Thats as important is the stock pump is okay on stock and or smaller tunes but if your going 17 pounds or more a different/ better pump is a must. AND the return line going into the slipper/banana cup where the pump sits should be done also. I might even go as far as saying any “tune” should have a upgraded stronger pump.

 

[jonlafon1]

I ran 4K miles on the return line mod. Be CARFUL where you drill your hole and size. Keep it tight. I was worried about leaks also. No problem.

 

[jonlafon1]

 

[VX1R]

I've got no skin in this game but while checking out the Precision EFI site recently I noticed that they've got a fuel upgrade kit this year for the Turbo 998 motors:

FUEL SYSTEM UPGRADE KIT - 998T

FUEL SYSTEM UPGRADE KIT Since the oem fuel pump is not enough to feed more than our stage 3, the fuel pump upgrade kit will make sure you will not run out of flow with our higher power packages. Our kit also include our special venturi system to eliminate the common fuel starvation problem...

precisionefi.com

 

[Phatboyc]

According to them even in stock form there is fuel starvation when tank is low...?

Our kit also include our special venturi system to eliminate the common fuel starvation problem caused by the design of the oem fuel system.
The oem design made a stock sled go into starvation when the fuel level is running under half of the tank and under hard acceleration. This situation results in your air/fuel ratio going leaner and harming your motor.

 

[jonlafon1]

That’s a pretty expensive kit. The TD fuel pump and some fuel line and a grommet and rubber washer. I don’t doubt it’s probably a great kit and definitely works. I think I’m staying clear of product from these guys. Seems way over priced and the tunes cause deto. No pun VX1R!

 

[Turboflash]

I've installed a number of these PEFI kits. It comes with a new all-billet tank cap with stock-type quick connect fuel fittings. The return line is 5/16" fuel injection hose. Under the machined tank cap, the return line has a 5/16" diameter tube that extends downward about 2" putting it directly into the middle of the basket and below the top of the basket. The basket will always be full until you literally run out of gas. As previously stated, the fuel pump pulls gas from inside the basket. With this system, the fuel pump will always be submerged in gas until you run out completely.
Also, based on the numbers on the pump, I believe it's a 155 liter/hour pump which is about 50% higher volume than a stock pump. It's longer and bigger diameter than stock pump. These kits are very nice but expensive ($620). But, what are we willing to pay to keep engine safe from starvation?

 

[1nc 2000]

I've got no skin in this game but while checking out the Precision EFI site recently I noticed that they've got a fuel upgrade kit this year for the Turbo 998 motors:

FUEL SYSTEM UPGRADE KIT - 998T

FUEL SYSTEM UPGRADE KIT Since the oem fuel pump is not enough to feed more than our stage 3, the fuel pump upgrade kit will make sure you will not run out of flow with our higher power packages. Our kit also include our special venturi system to eliminate the common fuel starvation problem...

precisionefi.com

Wow, They sure are proud of their products!

If a person was concerned about the yamaha grommet and elbow leaking they could go to Summer Racing catalog and buy a fuel tank fitting.

 

[1nc 2000]

A high volume fuel pump GS342 can be bought for under a $100 from Summit racing catalog.

 

[GodSpeedSWE]

Been running the same setup as jonlafon1 for a year now without a single surge. Before modifications it was another story... Since I run a lot in the backcountry I used to have problems when less than ½ a tank doing prolonged right hand dognuts. Or sled beeing tilted on its right side, simply would not start unless I rocked violently from side to side. (Opening the ports in bottom of the cup)

 

[NYTurbo]

Hurricane sells the grommets

 

[jonlafon1]

Had this in my box of goodies for new sled. 1/4 fuel return line.
TD fuel pump right from get go on this 2022.