[diceman50]

It took a lot of trial and error and fiddling around to get it to work but, eventually I got it to running well. I can tell you that you shouldn't expect much help from MSD's tech support. They were very willing to help but have little experience with inline engines. In fact they told me that I was the first one to try it as far as they knew.

The engine would start and stall several times before it would idle. (3-4 or sometimes 6-8 times) When it did idle it would stall again if you revved the engine. It drove OK if you could ever get it to idle but would stall almost every time you stopped. I wore the tech guys out at MSD and to their credit they tried very hard to help me even exchanging several parts including the throttle body itself which contains the computer. Nothing helped so I concluded that the problem was with the software.

The breakthrough came when I rebooted the computer for the 100th time or more. When you reboot the system it defaults to a 350 V8 engine. You have to reconfigure the computer to your engine size, # of cylinders, etc. On this particular reboot I forgot to do that. It started and idled better than it ever had. When I figured out what I had done I changed the tune from 8 cylinders to 6 but, I left the engine size at 350. Huge improvement. I then started experimenting with different engine sizes and finally used 360 cu. in. I also increased the pump shot by 15% and the VE enrich by 10%. This made the engine very happy and it starts and drives well.

I don't know if there is a problem with MSD's software or if there is an inherent difference in the fuel curve between V8 and inline 6 engines. I tend to believe it is the latter because on my 235 we started with a VE table for a V8 engine and ended up adding a lot of fuel to it. It would be interesting to do a similar engine with the FAST system and see if it suffered the same problems.

This is probably way more info than you wanted, but maybe someone will find it helpful.