I think Jon was refering to finishing soldering and assembeling the megasquirt board and has it working on the bench with the stimulator which is quite an accomplishment (I hated soldering those 4 little transistors). Congratulations! If he has a runing car this would be too much for me to bear as I have over a year into mine
I have a big hump on my throttle body behind the throttle switch which interfears with trying to adapt another TPS.
Can I ask why you decided to abandon the Ford throttle body? For me the cost of the Mustang throttle body and not knowing it is going to work is prohibitive.
While you guys are working on TPS's remember that the actual range of movement and the start and stop points of the TPS are not signifigant to megasquirt. Megatune has a real nice TPS range adjustment feature where you sit in your car with the gas pedal out and you just hit a button in megatune telling it that the TPS is at idle. Then you put the gas pedal to the floor and hit another button telling megatune that you are at WOT (wide open throttle) it then figures out everything from this. You can even have the wiring on the TPS backwards and megatune will work.
If you decide to go with a off the shelf potentiometer (variable resistor) the only thing you need to look out for is that the potentiometer is "linear taper" and not "audio taper". "Audio Taper" potentiometers change resistance exponentially with the movement of the shaft and a linear tapper potentiometer changes resistance linearly. I had a radioshack 10K potentiometer working but the cheap stamped sheet metal nut proved to be too flimsey. Maybe I will try e-bay'ing a quality built potentiometer.
Don't get too hung up on the TPS issue. My engine was running very nicely without any TPS enrichment at all. The TPS enrichment "fine" tunes the AFR for maximum power during acceleration. Without TPS (acceleration) enrichment you will still be miles ahead of the CIS injection system which could never get in the same ballpark of this type of fine AFR tuning. We are talking about tuning a few tenths of a point of AFR. CIS would be real lucky to get with in 4 or 5 points of stoich (14.7AFR). The main variables for tuning megasquirt are manafold vacuum (MAP) and RPM. TPS is is a very minor variable in comparison.
Making the fuel rails is just a matter of drilling holes in the right place and not breaking a drill bit off in the process. If you guys get stuck on the fuel rails let me know. I would be happy to drill a set of rails for you if you wanted to send me the fuel rail stock and pay for shipping both ways. The only cravet is I could make no guarentee that they would work on your vehicle. I would like to see you guys progress so you can tell me where to mount the relay board in the engine bay
Hbar, I would really like to see your pictures but don't sweat getting them up. There are only so many hours in the week and personally I would rather spend them working on my install than messing around with trying to figure out where to host the pictures.
