kellygnsd
08-07-2013, 11:00 PM
I have a 2007 Subaru STi with a fully built 2.34L motor, Borg-Warner EFR 7670 turbo, and FMIC all controlled by a Link G4 Extreme ECU. I live in California where we only get crappy 91 octane and I never really had the desire or the fuel system capacity to run E85 so I've contemplated meth injection.
I'm looking at the HSF-2 system specifically as I don't need the flow gauge but I still would like the failsafe feature. I was thinking of adding the turbine flow sensor to my order and performing the low and high flow failsafe logic in the ECU itself.
I already have dual fuel, ignition and boost maps in the ECU and I can trigger the second map to activate when I get the injection signal from the HSF-2/3 controller and when flow is between the low and high flow limits I set in the ECU.
I'm pretty sure I can make all that work as long as the HSF-2/3 controller has the necessary outputs. I'm all out of analog outputs but my ECU can accept digital speed inputs(frequency) that I can use for flow indication. Does the HSF-2/3 controller have an output for that?
I can also output a PWM signal that mimics IDC, can that be used as a trigger to start injection? If not what are my options for injection start and what kind of signal is required?
I'm running 1100cc injectors and plan on running around close to 28-30 psi of boost when all said and done so I need around 880cc of injection. I was going to go with two nozzles, a 1.2 and a .8 size to give me the required flow but I had a question about nozzle placement. I was thinking of putting the .8 nozzle pre intercooler and the 1.2 nozzle post intercooler. The post intercooler is still about 2.5 feet from the throttle body. What's your opinion on that nozzle placement? Is there any benefit to putting a nozzle pre intercooler or would it be best to have both nozzles on the cold side piping? Thanks for all the help.
Kelly
I'm looking at the HSF-2 system specifically as I don't need the flow gauge but I still would like the failsafe feature. I was thinking of adding the turbine flow sensor to my order and performing the low and high flow failsafe logic in the ECU itself.
I already have dual fuel, ignition and boost maps in the ECU and I can trigger the second map to activate when I get the injection signal from the HSF-2/3 controller and when flow is between the low and high flow limits I set in the ECU.
I'm pretty sure I can make all that work as long as the HSF-2/3 controller has the necessary outputs. I'm all out of analog outputs but my ECU can accept digital speed inputs(frequency) that I can use for flow indication. Does the HSF-2/3 controller have an output for that?
I can also output a PWM signal that mimics IDC, can that be used as a trigger to start injection? If not what are my options for injection start and what kind of signal is required?
I'm running 1100cc injectors and plan on running around close to 28-30 psi of boost when all said and done so I need around 880cc of injection. I was going to go with two nozzles, a 1.2 and a .8 size to give me the required flow but I had a question about nozzle placement. I was thinking of putting the .8 nozzle pre intercooler and the 1.2 nozzle post intercooler. The post intercooler is still about 2.5 feet from the throttle body. What's your opinion on that nozzle placement? Is there any benefit to putting a nozzle pre intercooler or would it be best to have both nozzles on the cold side piping? Thanks for all the help.
Kelly