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Re: combustion chambers on 2.1/2.3 are bigger...
Posted by Eric van Spelde [Email] (more from Eric van Spelde) on Mon, 17 Dec 2001 09:16:03
In Reply to: Re: 2.0 L to 2.1L Head whats needed., Ragnar, Sun, 16 Dec 2001 17:20:10
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... so static compression ratio will be somewhat lower rather than higher vs. stock. When using the stock 16vT pistons, lowering the c.r. down to somewhere in the 8.x:1 range is considered a fine compromise between low-down unblown power and fuel efficiency vs. attainable max boost/power levels. If you, however, already use 8vT pistons in your 16v to achieve this (like Damien Shulock did at some point, don't know about his current engine config) or like me, have custom pistons to do the same with the stock 2.0 16v head (93 mm pistons, cast Mahle like the originals, supllied by Gasparatos, Hamburg giving about 8.25:1 with the 2.0-16v head and 8.5:1 on the 8 valver) slapping on a 2.1 or 2.3 head will drop static compression ratio to 7.7 or thereabouts, which makes for a _really_ noticeable decrease in low end torque and throttle response. Remember those 7.2:1 B20T engines? Those made just about 83 hp as a NA engine...
posted by 213.116.154.2...
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