Brian.. nothing wrong with power down low.. this is a 529 (4.375x4.400) I built about 10 years ago. The issue is that with these new heads, and bigger bores, we are now moving into much more powerful engines, that should propel a 32- 3500 lbs basic backhalf GS into the 150-160+ MPH zone in the 1/4... so to do that, we need the trap rpm, and in this motor, we worked hard to keep that HP peak to 7000.. This 3000 lbs GS ran 151MPH at best, at 6800 in the traps. If the peak was 7800 say, then we could use deeper gears to launch the car even harder, and run faster ET, and trap at 8000-8200.. The lighter tube chassis cars can dial back on gear, they don't need it so much to get moving, and they are going to need rpm capability at 160-170mph.. Hi Trap rpm you just could not do with an iron block.. they would self-dissasemble in short order at that kind of rpm. JW
Yea,I wouldn’t try that with a factory block,but those numbers are similar to what I’m after. I like to drive everything. No roller skates or potato chip cars for me,but they are still cool though.
Mach1, What is your ring stack? I run an .043,.043,3mm,and keep everything above the pin. Hellfire rings,CP pistons.
Mine is 1/16, 1/16, 3/16. They are Total Seal rings on Probe Pistons. My oil control rings are into the piston pin, so there's a support ring under the bottom oil ring, too. Rods are 6.800.
JW, I think you have hit the nail on the head, for me anyway. I think I'm more interested in the results than I am in manner in which they are achieved! If you tell me that engine (A) should give you xxx HP and yyy ft/lbs at whatever rpm, and that should take my car that weighs 3100 lbs and has this trans and that rear, and that will equal 1/4 et of bbb and mph of ddd, then I would be satisfied! I don't really care how we get there. If it's two dominators or EFI or two turbos or one big Procharger or three kits of NOS...fine. Now that may be contrary to what a lot of racers on here think but it works in my world. I don't need to break new ground or come up with a Star Trek motor, that's what people like JW and Mike T. and many others on here are for. If I can benefit from the years of knowledge and experience represented by the many specialists on this board, beautiful!! Isn't that really what this board is for anyway?!?!
