We made a few pulls today. It made 870 power at 6800 and 760 torque at 5400. Found a few items to work on. Not sure if we'll put it back on the dyno or just make the changes and put it in the car. Depends on what the owner wants to do. No doubt in my mind that it would easily make 900 hp with some minor changes.
Just putting larger dia headers on it should make more peak HP. About how long are those 2" dyno headers? maybe 34" ???
I don't have a good feel for the torque peak RPM, so it is nice to know 5400. I could only guess 5500-5700. Do you think that is mostly a Super Victor intake function, and a Indy 440-3X would push the peak higher?
I think the 2 inch headers are 32 inches long. I had Stahl build them for me 20+ years ago. I've used them on 900+ hp engines before but the engines were smaller. If I was trying to wring everything out of this 572 then I'd have a larger set of headers built. PipeMax recommends 2.25/2.375 step headers with a 4 inch collector.
Andy, i am surprised pipemax came up with 2 1/4 to 2 3/8 tubes. Pipemax gave me 2 1/8. To 2 1/4 for a 550 cube 1050 hp build. The 550 with 440-1 heads made 926 hp with 2 1/4 dyno headers and only lost 7 or 8 hp using my chassis 2 1/8 headers.
