Originally Posted by arless
At least you know how to spend your money for good used parts. You better have some serious rear gears for that over carbed over or under camed big block And if you are talking you're closer to 500 hp than I am you should be closed to 650 hp with that tunnel ram and two fours on top. Thats what that intake carb is for with some at least 515 rear gears in a Ford nine in rear end. L@@ks good with that weiand tunnel ram and twin 600 cfm or 660 cfm Holleys. I'll bet that your engine is cold blooded until it worms up a bit with that tunnel ram
Well at least you got one thing right. Tunnel rammed engines are all a little cold blooded at first firing, but since I run a mechanical choke, that's not a problem. It only takes 5-6 minutes of driving to get warm enough.
I'd also guess you've done very little work with a BBC, or you'd never suggest 515 gears in the rear. A BBC with 515 gears would be around 5200 rpm at 80 mph. You'd have a tough time even finishing the 1/8 mile without winding too high, let alone do any 1/4 mile work! A BBC with it's great torque characteristics doesn't need gears anywhere near that low even for 1/8 mile drag racing.
And a tunnel ram can work extremely well at low rpm's and doesn't need to be wound up to the 6,000 rpm range to give plenty of low end grunt and power. I'm running 3.73 gears in my 8.8" Ford rear, and can easily break the slicks loose at most any speed/rpm in 1st or 2nd gear on my Super T10 4 speed.
You really should look at the build that Horsepower TV did on a 454 Chevy. They completely rebuilt it, plus swapped cams, and installed a hi rise intake and carb, with headers. They did a nice build and dyno'd it at 409 HP. Nowhere near 500hp.