Re: Friendly 377 vs 406 bet!
Give that 406 a lot of SR cam, a lot of gear, and a lot of converter.
There are only three ways to make Horse Power. Increase your Brake Mean Effective Pressure, Reduce Friction losses, Raise your RPM.
As you can see, you only have one option, which is raising RPM. You will both make about the same BMEP and friction losses. So the winner must increase RPM range to make more HP. SO, you MUST be able to COMPETE with him with RPM's. If you don't also choose Solid Roller, you will be throwing away at least 5% power, and probably 10%.
You must be able to out RPM the competition. A HR won't do that. If you are building a steel rod engine, you must have them prepped for high RPM's. Talk to your builder about that. If you really want to beat the other guy, you are going to have to spend more money.
Not that the Comp HR cam is a bad choice, BUT it is not a race cam, just a hot street cam. I consider my SR 255/263@.050" /109 LSA cam to be middle/high end cam for a hot street 406. With 4400 Stall, it leaves well, but it's still more street than strip. (Can't believe I'm saying this. It is not a daily driver cam. If you pick the same cam, you won't be disappointed.) At least to my thinking. Mine is a stock crank, 4 bolt block. Nothing fancy. It also pulls well to 7000, but that's about it. If I were going racing, my engine wouldn't work. Built too cheap.
I've seen some very good running 377's, and for racing, that's a good deal. They are easier to build with aluminum rods so you can turn some good RPM's, like 8500 or so. The 400 blocks breath a little better, and they hold up well with shorter strokes. IMHO. (I don't like the bearing problem thing with 377's, but it doesn't seem to hurt when done right.)
406 SB, Original Bill Thomas '63 Rochester FI
AFR 210, Lunati 501C2LUN, 255/263@.050", .628"
10:1, TH400, 3.31's, 4400 SS
"Life is too short to not run a solid roller cam."
"Nothing is impossible; if you don't know what you're talking about."