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Location:
Brisbane
Registered:
May 2002
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Re: boosting high comp
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Sun, 18 July 2004 13:04
 
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Boost means higher cylinder pressures, and higher cylinder pressure means harmful detonation is far more likely to occur. There are many ways to counteract this, but reducing the compression ratio is the simplest way from a mass production perspective. As mentioned above things are improving; early turbo engines ran very low compression (7.0:1 or thereabouts was the norm in the early 80's) but most turbo engines these days are above 9.0:1. This is mostly because of improvements in cylinder head design and engine management technology.
As for the 350 Chev with 11.5:1 and 35psi, I'm not sure where you got this idea about there being "no room" for detonation (whatever that means), but the only way those figures are possible is if it's running methanol, which is far more resistant to detonation than petrol. There's no way a petrol engine will hold together with that sort of compression and boost.
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| | Subject | Poster | Date |
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boosting high comp
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jesseT18 | Sun, 18 July 2004 09:38 |
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Re: boosting high comp
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Siktoy ra23 | Sun, 18 July 2004 11:40 |
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Re: boosting high comp
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jesseT18 | Sun, 18 July 2004 11:44 |
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Re: boosting high comp
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Alainve | Sun, 18 July 2004 12:14 |
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Re: boosting high comp
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Norbie | Sun, 18 July 2004 13:04 |
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Re: boosting high comp
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SeptemberSquallIndustries | Mon, 19 July 2004 05:32 |
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Re: boosting high comp
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fatts | Sun, 12 September 2004 10:14 |
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Re: boosting high comp
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SeptemberSquallIndustries | Sun, 12 September 2004 10:39 |
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Re: boosting high comp
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oldcorollas | Sun, 12 September 2004 10:47 |
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Re: boosting high comp
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Allan | Sun, 12 September 2004 10:54 |
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Re: boosting high comp
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jesseT18 | Sun, 12 September 2004 09:35 |
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Re: boosting high comp
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MS-75 | Mon, 13 September 2004 00:12 |
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Re: boosting high comp
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batteryman | Mon, 13 September 2004 03:27 |
