Mass Flo EFI Inc

[olddog]

Originally Posted by Ronbo

I had Kieth Craft supply the entire driveline: MassFlo, Engine, Clutch, and transmission.

My comparison was based on an idenical engine of one of the members here (590Hp) and Kieth's sheet on his web site (580Hp). The Hp / Tq plots were consistantly higher across the RPMs measured.

I honestly don't see myself pushing this engine near it's limits as I just don't have the skills to contol it (maybe one day ). My main reason for avoiding a carb is, well, they're a PIA. (especially Holleys)

As far as "tweeking" I doubt I could do better than Kieth or Chris, but I may may fool with it at some point.

I have to agree that you have more than anyone actually needs on the street and most types of tracks. A conservative tune buys safety factor. I think I would leave it alone too, if it were mine.

O yea, did Chris do a custom chip or did Kieth do the tuning?

[Ronbo]

As I understand it Chris has specific maps that he burns in depending on application. Obviously depending on the engine different firing order and injector sizes as well.

Chris has been building these for some time now so I'd imagine working with builders like Keith it's about as good as it'll get.

Biggest advantage to the system is also it's biggest problem, the mass air meter is not in a good spot right on top of the throttle body. The oxygen sensors are located at the collectors in mine, again not ideal, but side pipes aren't real O2 sensor friendly (or headers for that matter).

About the only real problem I've heard of is that the system doesn't adapt itself real well to altitude changes (although it does have a barometric sensor). This may not be an issue anymore as the system has evolved over time.