Well I went from a FAST system and I am probably going with ECtune. My FAST system only needed the cam and crank trigger from the dizzy so I pulled out the coil and ignitor. Well the MSD wants to you run the trigger from the white/blue that went to the negative side of the stock coil. Well that isn't there now. The only white/blue wire is coming straight from the negative side of the TDC sensor which I am assuming does the same thing that it would have on the negative side of the coil. So without having to buy another dizzy how would I wire this thing up. I think running the msd trigger to the white/blue negative side of the TDC sensor should work but I have two concerns. Will the stock computer need to see that negative input from the TDC for anything? Will it cause any issues not seeing it? From what I can tell it only uses that TDC sensor for startup but I definately will need the car to start, haha. Also is the signal from that white/blue wire coming out of the dizzy to the ecu or is the ecu sending a signal into the dizzy like a pulsated ground etc for the negative side of the TDC sensor? Any input would be awesome guys, thanks.

 

I would just leave the fast system in the car

 

Honda based ecu needs to see the negative sides of the TDC, CYP and CKP to work properly.

Keep the FAST in the car or get ready to do it right.

 

I loved the FAST system but I just felt it was time for a change and a lot of people are using ECtune now and loving it. The main reason I was going that way too was the new chassis I got has a JKOBD harness already wired into the car and is done real nice. So I figured I would take this chance to switch it up a little. What would a stock dizzy be good for hp wise. Prob gonna shoot for about 600ish. I could keep the external coil as well with the stock dizzy if that would bump up the limits of a stocker.

 

YEah, I made over 700 with MSD HVC coil, digital 6 plus and old S200. Get the distributor setup for your car and wire it in.