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7 Jun 2000, 21:56 (Ref:16195) | #1 | ||
Racer
Join Date: Jul 1999
Posts: 326
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I note that the current Champ Cars engines such as Honda's are now revving to 15,000rpm which is amazing for steel spring valves. Now the question I have is the engines produce about 850-900bhp with the pop value on. How much could they produce without that restrcitor?
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8 Jun 2000, 02:26 (Ref:16219) | #2 | ||
Racer
Join Date: Mar 2000
Posts: 272
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The popoff doesn't 'restrict', it limits maximum boost pressures.
I asked that of a Ford engineer a while back - he figured 2000 hp with unlimited boost & a redesign of some components would be reletively easy to obtain, but not for very long! |
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8 Jun 2000, 05:15 (Ref:16260) | #3 | ||
Veteran
Join Date: Aug 1999
Posts: 9,208
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Shoot!
Where's Franklin with his jet engines now? |
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8 Jun 2000, 11:55 (Ref:16294) | #4 | ||
Racer
Join Date: Jul 1999
Posts: 326
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Enzo surely to limit something is to restrict?
If your road car will not rev above 7500rpm it is restrcited to that amount, as the engine will go higher? |
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8 Jun 2000, 13:00 (Ref:16298) | #5 | ||
Racer
Join Date: Mar 2000
Posts: 272
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Sorry - when I hear "restrict' in this context, I think of meaning a flow restricter like a venturi.
Just a matter of semantics, I guess ! C'est la vie! |
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8 Jun 2000, 14:00 (Ref:16305) | #6 | ||
Veteran
Join Date: Sep 1998
Posts: 2,762
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According to RaceTech Engineering, the valve springs used in CART have been the most studied and tested components on the cars. Honda, Ford-Cosworth, Mercedes-Ilmor, and Toyota have spent many hours and tons of money developing the current lot of titanium mult-coil springs used to limit valve float at the insane rpms turned.
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8 Jun 2000, 14:54 (Ref:16310) | #7 | ||
Racer
Join Date: Apr 2000
Posts: 211
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CART cars are only slightly lighter than the Porsche 917/30 Can-Am car (a 1,300 to 1,500 horsepower car).
If CART had engines producing 1,500 to 2,000 horsepower but were restricted to two-wheel drive and current size tires there would be a lot less incentive for building 15,000 rpm engines. |
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