Reply to "Conversion of Hilborn BOSS 302 FI to Pantera"

Jack,

My plan is to add EFI nozzles, and use an ECU with sequential capability. My understanding is that the problem with most mechanical FI conversions is that the throats at just too big to have a high enough air flow rate at low speed. However, the BOSS 302 is a little smaller than the current 351C Hilborn FI. The butterflies on the BOSS 302 FI are just over 2 inches (I think). I'm thinking that the sequential injection will make the most of whatever air velocity in achieved. Unfortunately, these ECUs aren't cheap, but I'm hoping they drop in price in the next year. I was thinking about using a Speedpro with the sequential firing and wide band O2 sensor options, which I think costs about $2500 these days (painful). I've the Motec is really good, but costs twice as much.

Hilborn sells a version of this manifold without the pump, fuel lines, etc., intended for EFI conversion for just under $700 (when I checked a few months ago. It's just a manifold with butterflies, and flanges to bolt velocity stacks on. They are basically selling off what they have left in their warehouse.

One advantage is that this is a really short setup. I think it will fit under the engine cover if I use velocity stacks with mediumly tight 90 degree bends, with 8 individual air cleaners sitting over the valve covers.

Having said all this, I'd still appreciate hearing from someone who is, or has, run this manifold. If anyone can ID the car in Chuck Milton's chassis stiffening section, that appears to have this manifold, it would be a big help.

Ken