9krpmrx8

iTrader: (46)

Ah, Ok. I'll look it up. Thanks.

TeamRX8

iTrader: (25)

did you ever check the high/low speed circuit like we discussed?

9krpmrx8

iTrader: (46)

I looked at the diagram you posted but I need to physically locate the resistor and bypass it. I kind of suck at electrical stuff so I may need some help on doing this.

TeamRX8

iTrader: (25)

It's at the bottom of the RH front shock tower underneath where the air pump is located, big silver metal block with cooling fins

9krpmrx8

iTrader: (46)

Oh **** . I knew that had something to do with the fuel pump, just didn't know it was a resistor. Thanks. So I just jump a wire across it to bypass it right?

TeamRX8

iTrader: (25)

You unplug it from the wiring harness, then jumper across the two pins in the wiring harness connector

The resistor reduces the voltage to the pump, by jumpering the two pins you are sending full voltage to the pump. Might run a bit rich at low rpms due to the higher pressure from the pump running at full speed, but you will be looking to see if the same pressure drop/jump occurs under the same conditions

9krpmrx8

iTrader: (46)

Gotcha, thanks.

TeamRX8

iTrader: (25)

because if it doesn't then this likely means it is the resistor kicking in and out, not the pump

the issue with the Aeromotive pump is that is is super high flow likely way beyond anything you need. It may be a good pump, but you will be bypassing excessively due to it being oversize. Aeromotive also makes a nice pulse-modulated speed controller to slow the pump down to minimize the bypassing, but it is another not so cheap price added to the equation. In theory running it slower will add to the lifespan. so as always ...

speed is only money, how fast can you afford to go?

9krpmrx8

iTrader: (46)

Well, not very fast . It's definitely a learning process and if it is needed then I will get it.

sauceyI986

Since I'm playing catch up I don't think the pump is a direct fit I had to change the fuel filter screen and a couple of things to make work properly. I will no how it runs tommrow.

olddragger

iTrader: (3)

Dude---save yourself some possible headaches and just get the S2 fuel pump assembly. Its solid and it works for our power level. I think Paul at Mazmart has a used one now.

RotaryMachineRx

iTrader: (1)

S2 pump assembly is a direct replacement.... same retaining ring and electrical as used in S1?

ASH8

Pretty sure it is not a "direct swap", it will fit with some mods, I am trying to think who put an S2 Fuel Pump in an S1??

I am not getting the same Part Numbers for the retaining Rings or Seals (also changed in S2).

Denny might know?

TeamRX8

iTrader: (25)

No it's not, it's been detailed on the forum before, classic OD commentary ... he did, that's why I don't understand why he makes it sound like a direct P&P fitment

olddragger

iTrader: (3)

all you have to do is to install a hose that fits between the tank siphon hose and the pump assembly--that a small piece of submersible hose with 2 worm claps. Then change the fuel tank level electrical connector that plugs into the underside of the pump assembly. The positive and negative wires have flipped sides between the models. Cut it, flip it and wire it--no problem. 15 minutes --its done
The ring and the gasket off the s1 works as it is still fitting the s1 tank? I have been running one for 2-3 years now. Its a much better pump assembly (cup, regulator, filter and siphon set up) AND its a better pump
Its designed to provide the oem fuel pressures and you dont have to modify the regulator.
Its the easiest solution that I know off for this level of power.

9krpmrx8

iTrader: (46)

I haven't had the fuel pressure issues again but I'm keeping an eye on it. I may swap in the extra stock pump I have, it's a low mileage unit out of an 07'.

olddragger

iTrader: (3)

every one of the Ga RX8 club members with the S1 model and that do hpde's have had to replace their fuel pumps at some point. Maybe we have dirty gas in Ga --IDK? But, still it has had to be done. They had good performance on the street , but they got the fuel starvation issues that have been discussed many times on this forum. Those that placed the s2 pump in their car have never had that problem to return. Those that continued to use the S1 design have had the problem return at some point.
Fuel supply is CRITICAL after you add FI to this engine. My advice is to not take chances with this. I know you are going to be canyon driving--(yeeHAW!) which is a lot like hpdes. So get that fuel system supply as rock solid as you can. I have no faith in the s1 fuel pump assembly.
Hell-- the cup was not even designed for the RX8--Mazda pulled it from somewhere. Who knows.

cavemancan

Can the assembly be sourced without the pump?

9krpmrx8

iTrader: (46)

Nope.

cavemancan

shadycrew31

iTrader: (6)

What was the issue with the aeromotive, it's too good?

TeamRX8

iTrader: (25)

oh man, don't cut the wires, just swap the pin positions in the connector with a tiny jeweler screwdriver

http://www.4shared.com/file/37942260...n_Removal.html

Brettus

iTrader: (2)

Just throwing this into the mix .... I wonder if premixing will aid in getting good pump life?

Still running the Walbro and have my fingers xd .

9krpmrx8

iTrader: (46)

This pump has seen premix since day one. I may pull it to see what the sock looks like, but IIRC a filthy sock still has not restricted flow at all.

TeamRX8

iTrader: (25)

I have never seen mine dirty, maybe I'm just lucky