My92

Yep, there the ones that most of us use. I myself am running a set of 1.8l injectors and a fmu also just retarded my timing and im im 7ish psi right now

EO2K

iTrader: (37)

Please read:

Fuel Injectors - Miata Turbo FAQ
Adjustable Fuel Pressure Regulator - Miata Turbo FAQ
Fuel Pump - Miata Turbo FAQ

But don't stop with those pages. TONS of stuff on there you need to read up on before you go any further.

firefaux

If I got bigger injectors, would a fmu be necessary?

firefaux

The FAQ says stock injectors are good up to 6 psi.. Could I do that without a fmu?

My92

You need the FMU to raise the fuel pressure with boost. That increases your fuel flow or cc`s. With out a FMU its not gonna work

My92

You need the FMU to raise the fuel pressure with boost. That increases your fuel flow or cc`s. With out a FMU its not gonna work

dustinb

Just out of curiosity, what manifold are you running?

firefaux

plan to weld together a custom 304 ss manifold

firefaux

Theres so many holes, how do i know which ones the oil drain and feed and such?

firefaux

I see. Corct me if im wrong, but it uses the pressure in the intake to boost the fuel pressure?

dustinb

[Wille=firefaux;959264]Theres so many holes, how do i know which ones the oil drain and feed and such?[/quote]

Are you sure you should be installing a turbo? The oil drain will be easy, it has two bolts. The oil feed is exactly opposite. The remaining two are water. They are not directional. And yes you will probably have to clock the turbo (rotate it).

My92

Yes, in a round about kinda way it work just like a Rising rate fuel pressure regulator, for every lb of boost it will increase fuel pressure by a said amount.

firefaux

ok. sweet. One more question: given that the exhaust port for my turbo is a 3 bolt and the wastegate recirculates the gases back to the turbine, would i have to setup my system differently in any way or is it all pretty standard?

dustinb

You have an internal wastegate. You just need to have a downpipe made with the proper flange.

My92

All the wastegate does in a dumbed down manner is allow exhaust gasses to BYPASS the exhaust turbine so you only make the appropiate boost (in this case what ever boost pressure your wastegate is set at) with out it the turbo would just spin till it popped.

firefaux

just got some 97 injectors and a procharger fmu.
now as for the installation, the top goes to the intake pressure, the middle goes to the gas input and bottom goes to gas return???

NOTE: THIS PICTURE IS UPSIDE DOWN

firefaux

just got 1.8 injectors, procharger fmu, 255lph hp fuel pump, and a cheap ebay cast iron mani im planning to cut relief lines on. would a MSD Boost Control sufficient for low boost mods? if so how much boost?

firefaux

would one of these work? or even needed? MSD Boost Ignition Timing Unit for Miata 1990-1997

sixshooter

iTrader: (12)

Is that a 1:1 FMU or a rising rate FMU ? I don't know anything much about FMUs but know that the rising rate FMU raises the fuel pressure by 8 or 12 lbs (or something) for every pound of manifold air pressure increase and that you can change an internal part to adjust how much it rises per pound of manifold pressure to change the fuel air ratio.

Do you have a wideband oxygen sensor or are you going to run a small hose up to the cabin to smell the exhaust under boost to tell if it is rich or lean?

firefaux

ya i plan to have a wideband sensor