80 octane mexican gas & pinging
Mar 2, 2001 | 02:28 PM
#11
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Mar 3, 2001 | 12:43 AM
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Mar 3, 2001 | 10:50 AM
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Aug 30, 2001 | 08:21 PM
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well, better a half year late than never, while sealing the cement in our shop i seen the can of mexican gas and rembered that I never did the video. I sent the video just now, but the mic on the cam didnt really pick up the ping. Trust me, its as loud as banging on the bottom of a empty coffie can with a hammer!
Aug 31, 2001 | 02:38 PM
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Too bad about that clip, maybe I can make one next time I have an engine do that, but just so everyone knows, there is NO mistaking an aircooled 4 cycle knock(detonation.)
MHO It litterally sounds like a nice 16 oz hammer hitting the aircooled flat L head from the inside on mower type engines( this happen with regular gas when the flywheel key get sheared from hiiting a stump or the like)...
If it doesn't sound like a hammer in an aircooled motor it's probably not pinging, and certainly not knocking.(very light pinging doesn't hurt a thing and in fact is the proof that you are achieving the limits of that motor combination/condition. Also of note: many modern car engines have sensors to tell if the engine is knocking, if it detects enough pinging or a single knock it'll istantly retard the timing a few degrees 'on the fly')
MHO It litterally sounds like a nice 16 oz hammer hitting the aircooled flat L head from the inside on mower type engines( this happen with regular gas when the flywheel key get sheared from hiiting a stump or the like)...
If it doesn't sound like a hammer in an aircooled motor it's probably not pinging, and certainly not knocking.(very light pinging doesn't hurt a thing and in fact is the proof that you are achieving the limits of that motor combination/condition. Also of note: many modern car engines have sensors to tell if the engine is knocking, if it detects enough pinging or a single knock it'll istantly retard the timing a few degrees 'on the fly')
Sep 1, 2001 | 02:21 AM
#19
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Cars and trucks 1995 and newer with OBDII will pull the timming back before it is even herd, but on my 90' toyota truck V6 it lightly pings when i pull 4th gear threw town and it doesnt pull it back. I think the new cannondale with EFI has a knock sensor
Sep 1, 2001 | 06:42 AM
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