Now that the temperature is heating up and my engine seems to be running hotter, I’m reading all kinds of stuff on the internet about different coolants. I’ve also seen claims about additives you can just pour in and the engine will run cooler. Do any of these work? D.P. Jeff Smith: Over the years,
The U.S. Environmental Protection Agency seems to love its ethanol. Farmers love it, too. But if you’re a hot rodder–particularly a hot rodder with a carbureted or older-style fuel system–ethanol isn’t exactly your friend. Ethanol blends can corrode your carburetor, fuel tank, and other fuel system components and damage engine seals and O-rings, according to industry experts. And
Got questions? We’ve got the answers—the Summit Racing tech department tackles your automotive-related conundrums. This week, we’re answering some important questions about swapping gears. E.B . • Lake Ronkonkonia, NY Q: I have a 1987 Pontiac Trans Am with a 305 TPI engine, a TH-700R-4 transmission, and 2.73 rear axle gears. I want to upgrade to 3.42
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