[Jim Vander Wal]

I have a PS 780 double pumper, runs well. Also played with a 940 from Patrick, it was too big. Great after 5,000 and made more power than the 780. The 780 made more power under 5,000 and drove better. With the 780 power is leveling off at about 6,200 and remains pretty flat to 7,000.

Patrick is great to deal with.

I had a Holley 770 Street Avenger that was old but set up well with lots of dyno tuning. It took us a lot of work and time to make more power with the PS 780 but it did and it had better throttle response right away.

But I've seen Roush 427s make more power with the switch to the ProSystems carbs. The tuner has a lot to do with what you'll get from the carb. Nothing against Roush but a good tuner will get more power from their engines some of this may come from a carb change.

Chokes are over rated but they do make the first 3 minutes of operation easier.

Engine: RDI aluminum Windsor 427, 34 degrees advanced, 230-240 degrees at .050, .610" lift I&E. Vic Jr, AFR 225s, 1/78" custom headers & sidepipes from Firefly Performance. 450hp/425tqe at the wheels on a Mustang dyno.

Jim