infernosg's S5 N/A Build

infernosg · 05-11-2012, 10:29 AM

Progress has been slow. With Spring comes lots of stuff to do around the house...

I made a battery tray for the ETX18L I picked up a while back. It bolts to the floor in the passenger's side storarge bin.

I decided to replace the entire stock fuel system (not just the FPR and fuel pump). Originally I was just going to add a new bulkhead connecter (thanks Force13B) for the new fuel pumo but I quickly discovered the fuel lid for the FC was already crammed tight. I decided to hack off the stock feed and return lines and add my own AN fittings so I fit the connector. With a little modification to the fuel pump support the new fittings go right in.

No one sells a female 6 AN to 5/16" barb fitting so that's why there is a female-to-female adatpor in there. 5/16" is required because that is the outlet diameter of the fuel pump (Aeromotive Stealth 340). The new bulkhead connector should fit on the other side of the feed line just behind the existing connector. The fuel pump, submersible fuel line and fuel-safe clamps are ordered and that will complete the fuel pump assembly and then I get to make the lines.

Fuel question: I'm hoping for about 225 whp when all is said and done. Right now I have two ID1000 injectors mounted downstream of the TB to accomplish that goal. I know I can bump up fuel pressure but is this still feasible or am I going to need more fuel flow? The other option I've devised is to run four ID725's staged in a primary/secondary setup: two in the stock primary location (need aftermarket fuel rail) and the other two just downstream of the TB (secondary). My concern would be not enough fuel getting into the secondaries as the TB feeds all four runners.

05-11-2012, 10:29 AM	#11
infernosg IT'S ALIVE! Join Date: Dec 2009 Location: Richmond, VA Posts: 811 Rep Power: 16	Progress has been slow. With Spring comes lots of stuff to do around the house... I made a battery tray for the ETX18L I picked up a while back. It bolts to the floor in the passenger's side storarge bin. I decided to replace the entire stock fuel system (not just the FPR and fuel pump). Originally I was just going to add a new bulkhead connecter (thanks Force13B) for the new fuel pumo but I quickly discovered the fuel lid for the FC was already crammed tight. I decided to hack off the stock feed and return lines and add my own AN fittings so I fit the connector. With a little modification to the fuel pump support the new fittings go right in. No one sells a female 6 AN to 5/16" barb fitting so that's why there is a female-to-female adatpor in there. 5/16" is required because that is the outlet diameter of the fuel pump (Aeromotive Stealth 340). The new bulkhead connector should fit on the other side of the feed line just behind the existing connector. The fuel pump, submersible fuel line and fuel-safe clamps are ordered and that will complete the fuel pump assembly and then I get to make the lines. Fuel question: I'm hoping for about 225 whp when all is said and done. Right now I have two ID1000 injectors mounted downstream of the TB to accomplish that goal. I know I can bump up fuel pressure but is this still feasible or am I going to need more fuel flow? The other option I've devised is to run four ID725's staged in a primary/secondary setup: two in the stock primary location (need aftermarket fuel rail) and the other two just downstream of the TB (secondary). My concern would be not enough fuel getting into the secondaries as the TB feeds all four runners. __________________ '86 Mazda RX-7 Base '79 Mazda RX-7 GS