Plug & Play Megasquirt? Reply #15 – April 01, 2008, 09:50:27 AM Pretty sure it was EDIS. Quote Selected
Plug & Play Megasquirt? Reply #16 – April 01, 2008, 08:56:34 PM What's the difference? Quote Selected
Plug & Play Megasquirt? Reply #17 – April 01, 2008, 09:12:13 PM simplification of integration. Quote Selected
Plug & Play Megasquirt? Reply #18 – April 01, 2008, 10:11:39 PM Is a standalone really needed? The TwEECer with the BE/EA software can do most of what is needed - and does batch firing really fire all the injecors on one side simultaneously?I like my second dashboard :D Quote Selected
Plug & Play Megasquirt? Reply #19 – April 01, 2008, 10:51:27 PM Quote from: Cougar5.0;212095- and does batch firing really fire all the injecors on one side simultaneously?No, batch fire fires TWO injectors on each bank(side) of the engine at once or four total... A V6 fires one and two in a batch fire configuration(not that the question was asked)... Quote Selected
Plug & Play Megasquirt? Reply #20 – April 01, 2008, 11:02:38 PM That sucks - how do you dial in the injector timing so that you aren't potentially passing fuel into the exhaust at low RPM's with a large overlap cam? Quote Selected
Plug & Play Megasquirt? Reply #21 – April 02, 2008, 05:57:54 PM tuning. connect a pc, data log all the sensors while the car is running, revving, driving, whatever... print that off and it'll tell you where it's rich, lean, etc... adjust those rpm and save it to the MS system. Quote Selected
Plug & Play Megasquirt? Reply #22 – April 02, 2008, 09:56:29 PM I know about tuning (sorry if I wasn't clear here as I datalog and tune with the TwEECer now). With the EEC IV computer & the TwEECer, you can adjust the injector timing so that the injector won't fire until the exhaust valve is closed. You can do this at idle and low RPM's & light load only so it won't effect power production. It's possible with a large overlap cam to fire the injector while the intake is opening and the exhaust valve is not closed yet - thus passing some fuel into the exhaust. It just wastes fuel and can effect the AFR readings and skew what the engine thinks is stoich. There may be other issues with evaporation off the runner walls over time that effect burn consistency and transient fuel calculations. Perhaps I take this stuff too seriously :hick: Quote Selected
Plug & Play Megasquirt? Reply #23 – April 02, 2008, 10:16:33 PM Quote from: Cougar5.0;212293I know about tuning Understatement of the week! Quote Selected
Plug & Play Megasquirt? Reply #24 – April 03, 2008, 07:38:05 AM Quote from: Cougar5.0;212293I know about tuning (sorry if I wasn't clear here as I datalog and tune with the TwEECer now). With the EEC IV computer & the TwEECer, you can adjust the injector timing so that the injector won't fire until the exhaust valve is closed. You can do this at idle and low RPM's & light load only so it won't effect power production. It's possible with a large overlap cam to fire the injector while the intake is opening and the exhaust valve is not closed yet - thus passing some fuel into the exhaust. It just wastes fuel and can effect the AFR readings and skew what the engine thinks is stoich. There may be other issues with evaporation off the runner walls over time that effect burn consistency and transient fuel calculations. Perhaps I take this stuff too seriously :hick:This is exactly why I would prefer an SEFI type aftermarket setup as opposed to batch fire. People will argue that it really won't matter much at high RPM's, but when I'm slogging along the interstate for 3 hours @ 1800-2000 RPM's I'd bet it does.Looking at the TwEECer RT package the price is comparable. When the time comes the RT in fact looks to be the way I will go:burnout:BTW, Diggin the new sig with those rims;) Very Nice! Quote Selected
Plug & Play Megasquirt? Reply #25 – April 03, 2008, 01:59:03 PM Quote from: Cougar5.0;212293I know about tuning (sorry if I wasn't clear here as I datalog and tune with the TwEECer now). With the EEC IV computer & the TwEECer, you can adjust the injector timing so that the injector won't fire until the exhaust valve is closed. You can do this at idle and low RPM's & light load only so it won't effect power production. It's possible with a large overlap cam to fire the injector while the intake is opening and the exhaust valve is not closed yet - thus passing some fuel into the exhaust. It just wastes fuel and can effect the AFR readings and skew what the engine thinks is stoich. There may be other issues with evaporation off the runner walls over time that effect burn consistency and transient fuel calculations. Perhaps I take this stuff too seriously :hick:Is this bank fire or sequential? If it's bank fire, there will always be one exhaust valve open.If it's sequential, just set it at 450 degrees before bottom dead center Intake stroke accross the board to start with. You may need to lower it to 350-400 at idle if it stumbles a bit. This is cause by the heat of the engine causing the fuel to vaporize back into the manifold and into other cylinders, so you inject later to absorb less heat. You can move it around at WOT and get a couple more ft-lbs, but you probably wouldn't even notice the diff. Don't go over 500 degrees. If your system references TDCCompression for injection timing subtract 180 degrees from numbers. Quote Selected
Plug & Play Megasquirt? Reply #26 – April 03, 2008, 02:34:17 PM It runs off your main processor and allows you to make adjustments to it, so it's SEFI. Quote Selected
Plug & Play Megasquirt? Reply #27 – April 03, 2008, 10:48:14 PM Yeah, the TwEECer just intercepts & replaces the functions, tables etc. while the code is still stock Ford EEC IV. The TwEECer software is kind of limited, so I and many others use EEC buttstuffyzer to buttstuffyze datalogs and Binary Editor which takes the place of the TwEECer programming software but anybody can modify the definition files & he supports it regularly. Also, his program will datalog and now has the buttstuffog dashboard (pic posted earlier) that lets you see your sensors etc live as you drive. Here is a shot of EA on the cam tab that helps you decide on injector timing:Here is binary editor - this is my actual injector timing: Quote Selected
Plug & Play Megasquirt? Reply #28 – April 04, 2008, 09:04:29 AM Quote from: V8Demon;212367It runs off your main processor and allows you to make adjustments to it, so it's SEFI.Isn't EEC-IV batch fire? It has no cam and crank sensor (like the explorer) to discern where #1TDC is to begin the "Sequential". Quote Selected
Plug & Play Megasquirt? Reply #29 – April 04, 2008, 10:17:47 AM EEC IV uses a signal from the TFI module in the distributor to time all events called the "PIP" - see description below. QuoteThe EEC gets one and only one timing signal from the TFI unit. It is called thePIP (Profile Ignition Pickup). The PIP signal is 45 - 55Hz @ 1000 RPM, for 4, 6and 8 cylinder engines and, with the exception of SEFI, has a duty cycle of 50%.SEFI uses Signature PIP where the #1 vane on the PIP reluctor is roughly 35%duty cycle and the rest are roughly 50%. The EEC uses this to detect cylinder#1. On a stock car, the leading edge of the PIP signal is @ 10 BTDC. Quote Selected
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