Without a surge tank that will result in the HP pump starving and a pressure drop out just like using the OEM pump as a primary...so not a lot of help

There needs to be enough reserve in whatever encloses the primary pump to prevent the pump from running out of fuel

I think I have tried about 8 different setups....that's why I can tell you what didn't work...I think I tried almost everything humanly possiblebefore I said F it and did the surge tank setup

And if anyone thinks there setup works..post it up..but remember I'm talking about a track setup that is pulling over 1.5G's when it causes issues...not slow assed track day stuff

 

bonus of using a fuel filter - need not be certified. A pure surge tank needs to meet the same ratings that a fuel cell does.

 

And as long as you stay NA...you don't even need that

 

Dannobre, post some pics of your surge tank setup - I'm curious to see it! Also, are you running a fire suppression system in your car?

 

No fire supression...other than a halon extinguisher mounted where I can get at it easily I still have a stockish interior so they don't work too well anyway

 

assuming it's allowed period, in my case not.

 

hellO!
i have a rx8 rew !
but i see you install a 2nd pump in passenger side!
in my car i have a walbro 400 in driver side ! but i have problem to suck from passenger side!
i planning to install a oem rx8 fuel pump with oem canister in passenger side (i think the complete housing feet) to send fuel to driver side@ and change the fuel return to passenger side! you think that work?

 

You will lose the fuel level sensor, need some plumbing and electrical work but will work. Not perfect solution but will work. Best solution is a stock pump feeding a surge tank. I might try 034motorsport surge tank with a 044 inside the tank. Radium is nice too but expensive

 

The fuel level sensor will still work...needs a small bit of fiddling to keep it working. The issue is more how you hook things up....and if you plan on track driving or not

 

why lose the level sensor .I keep the wiring OEM . I don't mod that part

 

How did you mount the walbro 400 inside the canister

 

I buy Walbridge400 for e85 is short like 400regular . and some mods in canister. I have a picture comparative OEM rx8 pump and walbro 400 e85

 

here
walbro 400e85 and rx8 2004 factory
https://www.dropbox.com/s/b5mf5bvrb1...1502774191.jpg

 

the level sensor comes off the pedestal in the passenger side...you just need to rewire the plug and add the power wires and attach the sensor to the side of the pump housing to get the OEM pump to work and the sensor

 

I planned to install other OEM driver side canister with OEM pump in the passenger side. I see the level sensor connector and fit to OEM connector in the canister. the only unknown is when use OEM pump in passenger side goes empty .for that problem I get relocate the return fuel from engine to feed passenger side

 

I just put in a switch so I can shut it off when I am not on track

I also left the OEM suction assembly hooked up and attached the pickup to the pump body...
Be careful how you plumb the returns so the fuel stays in the cups as much as possible...thats where you will have problems.

Are you running return style system?

 

I have aero motive1@1 with return to the driver side tank

 

You will have problems with the pickup like that. ... the pump will pump out the canister faster than it can be refilled or stay full. A return system really should have a surge tank to prevent that.

 

the return go direct to canister feeding fuel . i think if the rx8 pump feed much fuel faster to the driver side of the tank i regulate the pump with a reaistance en positive cable or instal a low press fuel pump.

 

I did it that way first... that's why I said something

 

ohk.so exactly what problem you have when do that mod.

 

I found the pump starved earlier with a return system...especially with a higher thn OEM capacity main pump....

Especially on the track where the fuel would spill out of the cup more than on the street

 

OK you said the passenger tank goes empty with the OEM pump in the passenger tank with feeding the return fuel inside the passenger tank?

 

No
I said that the fuel cups tend to empty faster than they are refilled when there is a high cap pump and a return style system. That you need to be very careful how you set up the returns so you don't make it worse than the stock returnless system
And that it didn't work for me on the track

 

Surge tank is the way to go