[greg schroeder]

Pro-Systems carb being used in video at bottom with Roush 427R single plane intake. Rear wheel corrected HP dyno chart in my gallery.

I put the Pro-Systems mechanical secondary carb on my Roush 427R single plane intake manifold with 3.73 rear gear and 28 inch tall drag radials, .64 5th TKO. The carb was the 1040 cfm. There have been many posts about how this can't be done and drive on the street. I'm not quite sure what the resistance is about, it hammers street or strip and pulls 5th gear farting along at 1800 RPM too. Just ask Patrick what to do and he'll set you up.

My original carb that came on the engine as delivered was a mechanical secondary Holley 750 double pumper. The engine installer jacked that one up pretty bad leaving me looking for new ideas. You'd think it wouldn't be hard to send out the engine for a given DA, car weight and purpose. Anyway I did get the Holley 870 Avenger next as recomended by the Superformance dealer that sold the car with the Roush engine. I don't think they had a clue looking back at the situation. The Avenger went in the trash can after trying to make it work half way decent for a good month.

Get the Pro-Systems and don't look back.