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:The NA Z31s run 9:1 compression, that is the ONLY difference between the two blocks. 9:1 is fine for boost. There are SEVERAL people running 450+RWHP/TQ on stock NA blocks, pump fuel, and using them as daily drivers. The NA block dosnt run much more compression then your TT blocks, and is nearly as strong. It seems like every time a clueless poster pollutes the forum with a total lack of knowledge, his occupation is "student". Please, stop talking about that which you have no clue about, and begin learning. This isn't a high school or college cafeteria where you can pretend to know what you're talking about by spouting nonsense and get away with it- you're going to get gang raped here. You're comparing compression ratio of two totally different engines. If you knew anything about cars, you'd know that you cannot do that. Just because one car can get away with using forced induction on 9:1 doesn't mean that another car with a 9:1 CR will be able to do the same. Different combustion chamber designs will allow differing amounts of compression without detonation on the same gas. Nissan's engineers, which surely know more than you, felt the need to lower the compression ratio to 7.8:1 when they used forced induction on the Z31. If they thought they could have met their desired power goals by running 9:1 on that engine, they would have. But they didn't. Newer cars, with their more advanced combustion chamber designs, can get away with running compression ratios that were considered pretty damn high for unleaded pump gas 20 years ago. New Toyota Corollas have a 10:1 CR on 87 octane gas, and have a 11.5 CR to be used on 91 octane gas. Nissan couldn't have ran an 11.5 compression ratio on the Z31, there'd be detonation. Bad things happen to dumb people. And it has nothing to do with luck. Go ahead and run 15 psi on your 9:1 compression Z31, with undersized injectors and improper "student-style" mods. It won't be me who's crying when your engine grenades.
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20:51:07 07/21/06
