04-02-2011, 07:52 PM
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#10 (permalink)
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A True Z Fanatic
Join Date: Jul 2010
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Quote:
Originally Posted by BalanBro
Not necessarily. There is almost always a good bit of headroom in modern engines. It's just that some folks expect too much and start thinking that 12 psi on stock motor with cast pistons is safe. If they have a good tune and stick with the wastgate spring (7-8 psi), modern motors hold up just fine.
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Most modern motors don't really have much headroom, and there often isn't aftermarket support for modifications. Even if there is, there are usually severe limitations with nearly every component along the way. It's a pretty big deal to be able to buy a car that doesn't require replacing the trans, rear end, etc, along with massive headwork, just to get decent FI numbers.
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