Sunday, May 24, 2015

Ask for professional advice....And then don't take it...stick to your fantasy....

Had a guy mention an old Hot Rod article about a couple guys that ran a 440 powered '68 Charger in the Silver State classic and went like 185 mph. ( They were shooting for 200 mph ). He asked if I thought they could break 200 if they'd had a Hemi. I said no-the 440 they had was putting out like 600 hp-they didn't need more power-they needed a lighter and more aerodynamic car than a heavy, boxy '68 Charger. He asked what combination I would run if I wanted to try to go 200 in the Silver State classic or at Bonneville. I said I would use a 1982-90 Pontiac Trans-Am with a 454 Chevy for power as this would be the easiest and most econmical way to do it. Then he asks why not a '70's T/A with a 455 Pontiac. Here's why-# 1. Aerodynamics is just as much a factor in high-speed runs as power. A more aerodynamic car can go faster with less power because it slices through the wind easier. Why do you think a '79 Trans-Am can go 132 mph while a 454 powered GMC Stepside '78 1/2 ton pick-up can only go 118-even though they both weigh about 3,800 lbs and the truck had 20 more hp ( 240 vs 220 ) and catalyst-free exhaust?  Because the Firebird slices through the wind easier than the boxy truck. Very simple. Anyhow-I said-a '70's T/A has a drag coefficient of .048. The '82-90 model has a drag coefficient of .032-or .028 with the "Aero" package. That's about as low as your going to get with a production car. Even if they had the same amount of power-the '80's model would go way faster because of the aerodynamics. Secondly, the '70's T/A weighed about 3,800 lbs. The '80's model weighed about 3,200.  So with the aerodynamics and the weight advantage-the '80's model would go much faster with the same amount of power.  # 2. Bang for the buck. Like it or not nothing makes more power for less money than a big-block Chevy. Yes a Chrysler Hemi or Boss Nine Ford can make as much or more power-but at double or triple the cost. For example the GMPP 454 HO makes 440 hp and 500 lbs of torque for $5995.  The 465 hp 426 Hemi that Mopar Performance sells retails for $14,995. The 472 and 510 Hemis are way more expensive than the 502 or 572 GMPP Rat Motors. As for the guys question about a 455 Pontiac-yes Butler performance and other companies offer 600 hp Pontiac motors-at a cost of $15,000 or more. Then he asks if a Fox-bodied Mustang could do 200 with a 347 stroker?  Really?  I just said you'd have a hard time doing it with a slippery T/A with a pumped to the gills 454 Chevy. Why would you think a "barn door" Mustang could do it with a 347 small-block??  Really?? Mastermind  

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