Sorry for bringing this back up after months, but I got a PM asking me to answer a few questions.Sweet build! I actually started to gather parts ~3 months ago to build a similar engine hehe... I'll be using a mitsu 13g from a volvo 850/S70 with a built-in BOV.
I was planning on going megasquirt, to use bigger injectors without having to mess with the stock ecu. I understand the stock AFM output is current-based, instead of voltage based. This will not work with the apexi units (or any other aftermarket piggyback unit out there fyi...)
Another member here had a similar setup (jardamuth), and he had a custom made piggyback unit build to work with his setup. However, at ~$250 for the piggyback, I figured Id just use megasquirt and have a fully programmable ecu.
Also, my G16B has the newer style coil & igniter built-into-the distributor assy. This makes using a MSD BTM almost impossible, since it needs to be connected between the igniter and coil.
Anyway, quick question for you: you said you are running ~7psi of boost, with the stock injectors and stock FI system, except for less timing advance and the fuel press regulator, right? Any other changes youve made to run 7psi safely?
It also seems from your first post that you didnt had the press reg installed on the first few days, am I right? If so, you pretty much had everything stock except for the ign timing changed and @7psi. That'd be VERY impressive for a stock FI system to handle...
The coil and igniter in the distributor can actually be rewired for external components very easily.
That is correct.... I am running 7 psi with the stock computer, stock, wiring, stock injectors, & stock fuel system and ran it that way for the first few weeks with no issues. All I did at that time was to adjust the timing. I installed an AEM UEGO to meter the Air Fuel Ratio (AFR) and saw that it was leaning out at above 6 psi so I added the Rising Rate Fuel Pressure Regulator (RRFPR) for added protection. This made it run a little rich and instead of lean so it was safer at higher boost.
So yes, the stock motor and components can safely handle 5-6 PSI with no issues and I ran it really hard even before I installed the RRPFR and the AFR meter.
I am certain that with the right tuning this could be even faster! If you get to the point where you have a Megasquirt setup ready for the 1.6 16 valve motor just let me know....I'd love to test one out!
Sean (Pulling all this TURBO stuff out and selling it! ..Making room for the new 2.3 Liter!) DeVinney