Olddog,
Byron is correct that you have a factor unchipped PCM. MassFlo initially sold there system in stock form now he uses a piggy back chip to tune for displacement and injector size. I have not been able to tune the PCM to the new meter after massflo sent me the flow sheet as I have been out of the country for 3 months. I will say that when I first received the new meter withot a flow sheet we couldn't get the tune right as it was very rich. When I sent the meter to Chris at MasFlo he said that there must have been
oil contamination to the mete/intake which he suggested was from to much
oil on the filter. This was not the case as the filter hadn't been reoiled in a quite awhile. Where the
oil contamination came from was the PCV. I have since deleted the PCV and just put a filter on the valve cover. I will be returning to the states next month and will get the tune right then. I still think that your injectors are 1 size to big as I have had the motor running great and only making 340 WHP. This was with a 12yr friend that does this for a living tuning it over and over again to get the most out of the engine. I don't put to much faith in pc dyno numbers. JMHO. I'm not sure if I gave you the email or not to my tuner but he uses Diablo chip and has a tune for my car on file when it ran great.
brenth@dtpracing.com
He can give you his opinion as to which way to go either a Tweeker or Diablo or have MassFlo do it. I will say that if you go with MassFlo it will be a guess, if you go with Tweeker you will have to learn how to tune it and spend expensive time on the dyno or data log on the street. Brent should still have a good tune that will be very close for you setup as we have very similar engine but not perfect. Mac