20B-biggest turbo that'd fit on?
Super Snuggles
Joined: Feb 2001
Posts: 10,091
Likes: 34
From: Redmond, WA
Originally Posted by Maxthe7man
Its called compound turbocharging and even 20 years ago they were running manifold pressures of 250 psig.. The blades don't care its just a pressure ratio that is multiplied...Its a way of achieving very high boost pressures while maintiaing compressor efficiency.. Water and methanol are often injected interstage to intercool...
Perkins and cummins both used and some still use it on highway tractors, and power plants.. Some race cars have tried it, a variation on the theme is twin charging, which some mr2/corrolla people do...
Basically the heat of compression of the air is reduced by doing the compression in stages rather than all at once...max
Perkins and cummins both used and some still use it on highway tractors, and power plants.. Some race cars have tried it, a variation on the theme is twin charging, which some mr2/corrolla people do...
Basically the heat of compression of the air is reduced by doing the compression in stages rather than all at once...max
boy, you guys must be bored. Staged compression is completely unnecessary in a gasoline rotary engine. It really only adds efficiency if the turbo is way out of its range. Anything under 45psi is well within the range of a properly designed turbo, and since all but a very few 20Bs will blow apart long before that, not to mention that at 45psi you would be making over 2000hp, its kind of a moot point.
as far as the triple small turbos, it is a neat idea, but i personally don't expect it to work very well. One large turbo is much more efficient than 3 small ones, in spool time and compression efficiency. The only gain would be the lack of flow losses in the collector, but only if a divided intake was used as well, and even so doubt it would make up for the flow losses in the smaller turbos.
as far as the triple small turbos, it is a neat idea, but i personally don't expect it to work very well. One large turbo is much more efficient than 3 small ones, in spool time and compression efficiency. The only gain would be the lack of flow losses in the collector, but only if a divided intake was used as well, and even so doubt it would make up for the flow losses in the smaller turbos.
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