What engines are in supras and skylines?

I don't know anything about the skyline but my best friend is the original owner of a 1980 Supra which has dual turbos. You can't make it any faster. You can no longer buy them in the United States due to smog control laws. My advice is, don't drive an old car and try to make it faster. You'll just waster your money. Plenty of us tried that in the 1950's. Save your money. Buy new. You can have more speed than you can handle for under $30,000. The most important thing you can do is get your education, save money, get a good job and buy whatever new car you want.