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In a message dated 11/18/2003 8:35:39 PM Eastern Standard Time, eanderson@carolina.rr.com writes:
My personal opinion is that you can probably gain the same power out of a 13B if you have the rotors lightened, heavy duty bearings/harden gears and the entire rotating assembly dynamically balanced so you can wind to higher RPMs. Would also need the right induction and exhaust system. I mean the racing guys can get over 250 HP with the NA 13B, however, their reliability might be less than you would entertain for an aircraft application.
Lynn could probably address what you can get out of a 13B better than anybody on the list
Lynn??
As of last September, The bridge ported 13B in GT-2 was 305 HP at 9,300 RPM with two 44MM chokes in a Webber 48 IDA, as in GT-2 cars. Darryl Drummond. Probably needed 325 to be competitive. For street ported 13Bs (bigger stock looking port). as in E production cars, 235 HP at 9000 RPM with 38MM chokes.
Stan Lusarski or Darryl Drummond.
The E engines use the stock 2 piece seals. No problems. Peak power available for about 2 hours. So a fresh engine per weekend. Or if you have no money, (like my operation) a fresh engine every summer.
At 6,500 RPM with good oil temps and pressure, these engines will outlast the airplane.
Lynn E. Hanover
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