Bigstuff3 injection???

[Fuelie Fan]

I basically agree with Andrew, the BS3 would be great on either Gen3 engines or turbo'd old-school small blocks, but probably overkill for a N/A small block.

I wouldn't worry about base fuel table resolution on either the BS3 or the Holley. anything bigger than 16x16 is just a marketing point, as unless you own a dyno you WON'T tune every point of your base fuel curve, not to mention the fact that, once you're off-idle it's incredibly easy to fill in most of the table once you have an established torque curve.

As mentioned before, the low impedance injector support MAY be an issue, depending on your engine and the selected injectors. To clear things up, the benefit of low impedance injectors is linear flow range; side by side with a high impendance injector of the same flow rating, the low impendance injector can be controlled down to lower flow rates. This translates into better idle quality. There is no real power gain.

However, high impendance injectors are improving. The "bosch style" (Delphi calls theirs "multec 1") were only reliable down to pulsewidths of around 2ms. Newer generations of injectors (multec 2, 3, and now 3.5) are down below 1.5ms at 12v and higher, which is nearing the performance of the low impedance injectors sold by most aftermarket companies (and are themselves relatively old design). I've tested the 3's, and have a 2 that I will be testing soon.

David, if you can send me an estimated torque curve I can give you a better idea of whether you will require low impendance injectors.



Remember, for a race car where idle isn't super critical, it's a lot cheaper to turn the screw in and idle it at 1100 RPM than to buy low impedance injectors and idle it at 700.