So while I debate the tuning option and wait for a stock header to show up, I started to tackle some of the smaller projects. I had emailed Extreme Creations about their fuel pump unit. They got back to me....As i suspected, their regulator is a fmu style which explains how they get away with stock injectors. FMU's are old school, from back in the day before guys could crack stock computers to tune for larger injectors. They raise fuel pressure (a lot) with boost pressure to add fuel. While they are ok from low boost applications, nothing matches the tuneablity and consistency of a properly tuned ecu with larger injectors. Then there's the fact that Extreme Creations fancy billet fuel pump unit costs 1000USD. yikes
So after finding that the stock pump would suffice for my goals, I ran with it. By using about 60 bucks worth of hardware and a rising rate (1:1) fuel pressure regulator I had laying around, I got the ball rolling. I started by taking this ford style Aeromotive regulator I had from a 5.0 swapped 240sx and drilled the orifices for 1/8npt fittings, easy and mostly free.
At this point I felt comitted to the project and drilled a big ol' hole in my sending unit for a return fitting.
In order to put a nut on the backside of the bulkhead fitting, I had to grind away a bit of plastic that holds the oem fuel regulator in. Later this week I will be using my neighbors lathe to make up a plug to block the stock regulator hole, Ill have to make it a bit longer so it rests against that bulkhead fitting and doesn't fall out lol. I'll also try to make a plug that will replace the stock fuel pressure damper that I can drill and tap for a npt to barb fitting for my return line. Theres a piece available for the Nytro snowmobile that i think will work, but its 50 bucks. Since I have the aluminum stock and fittings, Ill try making one before I buy it. Ill have another update this weekend sometime.