Schumi,
I bet I could swap it back in 15-20 min if I was taking my time (sipping on a cold one). If I was in pit crew / crew chief mode I bet I could do it in more like 5-7 min. It really is that simple!!
Things I would do to make the swap fast.
Put a switch in line to the stock coil or quick connects.
Have a tray big tray set up with all the tools needed for each part grouped with the part and the needed fasteners.
Have a collection of extra fasteners just in case.
The actual trigger wheel is just one bolt. I welded the trigger wheel / gear to the retainer that holds the gear in place on the cam (the piece that the stock rotor is attached to). I did this for two reasons. The biggest was that it would be a real PITA to try to keep the wheel aligned while tightening up the bolt and since the cam gear retainer is keyed to the cam and the cam gear it can only go on one way. This means that there is no alignment or fiddling with it. Porsche did a precision fitment to this making it a very precise fit. This was a huge plus to this installation. It literally is virtually idiot proof. Once fabricated it is really just a bolt on deal. You can only put it on one way and it will always be in the corect alignment every time.
The other thing that you would not have to deal with is all the wiring. The original installation of this takes some time. In fact if you were to brake down the actual on car work time this is by far the longest part of the job You have to take your time with it and double check it. But in a swap you can just leave it in place. Tag it and bag it if you know what I mean.
I should take some photos of it now that I have all the wiring cleaned up. I am not sure I would call it "factory" but it looks darn good. What I really need to do is clean up the modified cam cover and put a guard / cover over the trigger wheel.
I hope to get to the dyno. My life is getting crazy at the moment. The only time I have been able to "test and tune" has been driving in and out of Boston to the office and home. I data logged my whole drive home tonight. I though this was cool until I realised that I will never get a chance to go through all the data.. . What was I thinking but I now have an hours worth of data logged to play with when I have nothing else to do.
I would really like to do a comparison on the dyno. This would be very interesting. I would probably do a base line "stock pull" and then swap everything over to the EDIS/megajolt system system and spend the rest of the session tuning. I could probably get 6-10 pulls in an hour if we were hustling. We got 10 the last time we were there with the race car. This is a case where a couple of helpers would be a huge benefit.
As for actual HP I am not really sure that I am getting all that much more. I bet at the most 15-20.(You really can not feel anything less than that in the car) What I do think is that the torque curve has been chanced and by eliminating the fall off of timing in the upper rpms that the stock set up has you probably actually are pulling and building HP all the way to red line instead of having that "sweet spot round 5500-5700 in stock form
Just one more thing to add to the list.
We should do a new england 944 dyno day. Having people familiar with the cars making the changes between runs really makes for much more efficient use of dyno time! And it is just a fun time!!
I thought I had posted this but here is a link to a kind of, sort of, build documentary.
http://www.autosportlabs.org/viewtopic.php?t=2026
Believe it or not I stated with the idea that I would build a coil on plug system with an EDIS8 that was cam fired. I still think this is do-able BUT the firmware on the megajolt needs to b modied and I think the EDIS would have a problem with the low rpms (around 400 at idle and only 100 when you were trying to start it. Anyway you can see me babble and laugh at my mistakes and there are a lot of photos of my trials. There were/are several things that I fabricated up and never made it to the car. I have a second complete trigger set up all but completed. I just have to weld up another trigger wheel to a cam fear retainer and purchase about $5. in nuts bolts and washers and spacers.