OMG! ConeDodger's Engine Case, is now ventilated |
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OMG! ConeDodger's Engine Case, is now ventilated |
McMark |
Apr 18 2009, 09:00 AM
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#1
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914 Freak! Group: Retired Admin Posts: 20,179 Joined: 13-March 03 From: Grand Rapids, MI Member No.: 419 Region Association: None |
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Rob just called me. Engine let go this morning in Stockton, on the way to the autocross. (IMG:style_emoticons/default/sad.gif) Sounds like a piston skirt broke off and trapped itself between the crank and case, and then blew its way out. Now he's got to wait for a tow truck. Ooooooh man. Poor Rob. I'm sure he'll have some pictures (with garbage cans) when he get's it back to his place. (IMG:style_emoticons/default/hissyfit.gif) (IMG:style_emoticons/default/barf.gif) |
Katmanken |
Jul 16 2009, 06:19 PM
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#2
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You haven't seen me if anybody asks... Group: Members Posts: 4,738 Joined: 14-June 03 From: USA Member No.: 819 Region Association: Upper MidWest |
This will probably come as a big surprise, but high performance engines have been tuned to run at light knock for years
Why? It's where the max power point is. Harry Ricardo noted this in the 1920's.... When you minimize engine part strength to minimize reciprocating part weight (ricer engines), you have to pay way more attention to the knock. Knock sensors were designed to run those engine at the hairy point of knock and to back it off slightly. That being said, seen any 30 year old Honduh engines lately??? No? It's because they all went boom and there ain't any left...... Aircoolds are a bit more succeptable to knock because they run hotter. Ugly melt on that piston JP |
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