Thread: Evo X
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Old 10-04-2007   #25
Shane@DBPerformance
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Re: Evo X

Just search for pics of STi, Honda, and 4G63 short blocks. The 4G63 has a fully closed deck. Most Honda engines like a GSR(B18C1), D16, NSX, Type-R, later H22s, etc have an open deck block. To make decent power with the Honda engines, you need to sleeve the blocks, which usually involves totally boring out the stock sleeves and replacing them with a supported sleeve or one close to a semi-closed deck. The STi has a semi-closed deck design, which lets them handle some power compared to the WRX that has an open deck design and is a fairly weak motor.
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