Well I have tuned the S&S 124 with there efi and it was not much fun but I had heard that the new program has gotten better. The first one was hard to get low speed correct with out over fueling or under fueling very tempremental. Poor street manners ran great at WOT but was not street freindly. S&S did know and was of no help or even caring " stating the 124 was a high performance engine and that was a how they ran and that the exhaust was to blame" Being that we where not running drags in fact we where using a white brothers pipe I was not going to listen to them. I tweeaked with fuel PSI and the Map sensor hole size and was able to get better results again not great just better.
