Any noticeable gains in MPG from anything you've tried? Headers?
02-01-2018, 12:08 AM
#41
Either some people have 10x better hearing that I do because rarely can I ever hear ping unless it's some old school engine that can't yank ignition timing in a fraction of a second upon spark knock.
I can't hear it knock on 87 in my truck but it does anyway, then does little to none on 89 octane. Half time it's lifter/rocker clatter that sound exactly the same to me.
I can't hear it knock on 87 in my truck but it does anyway, then does little to none on 89 octane. Half time it's lifter/rocker clatter that sound exactly the same to me.
02-01-2018, 03:38 AM
#42
TECH Apprentice
Either some people have 10x better hearing that I do because rarely can I ever hear ping unless it's some old school engine that can't yank ignition timing in a fraction of a second upon spark knock.
I can't hear it knock on 87 in my truck but it does anyway, then does little to none on 89 octane. Half time it's lifter/rocker clatter that sound exactly the same to me.
I can't hear it knock on 87 in my truck but it does anyway, then does little to none on 89 octane. Half time it's lifter/rocker clatter that sound exactly the same to me.
02-01-2018, 08:44 AM
#43
Either some people have 10x better hearing that I do because rarely can I ever hear ping unless it's some old school engine that can't yank ignition timing in a fraction of a second upon spark knock.
I can't hear it knock on 87 in my truck but it does anyway, then does little to none on 89 octane. Half time it's lifter/rocker clatter that sound exactly the same to me.
I can't hear it knock on 87 in my truck but it does anyway, then does little to none on 89 octane. Half time it's lifter/rocker clatter that sound exactly the same to me.
In my Toyota endeavors, the KR either sucks so bad, or the damn thing just KRs all the time, because its always like 20-40cts but I can never hear or feel it.
02-01-2018, 12:31 PM
#44
Either some people have 10x better hearing that I do because rarely can I ever hear ping unless it's some old school engine that can't yank ignition timing in a fraction of a second upon spark knock.
I can't hear it knock on 87 in my truck but it does anyway, then does little to none on 89 octane. Half time it's lifter/rocker clatter that sound exactly the same to me.
I can't hear it knock on 87 in my truck but it does anyway, then does little to none on 89 octane. Half time it's lifter/rocker clatter that sound exactly the same to me.
Lifter noise is a slightly heavier sound, like a tick/clack, and usually a less rapid noise. Ping is a lighter sound, a clatter type sound, and usually really rapid. Bottom end bearings for example are usually a clunk/knock.
In the 2000's I had tons of Fords come through that pinged, they do it really commonly and a carbon clean helps them stop, but thanks to them I have that keen sense for the sound now.
When diagnosing sounds and vibrations you also have to consider the speed of it to help narrow the source, and how heavy the metal clunk sound, sounds. Typically lifter and bearing knocks are slower speed than pre ignition because you will usually only have one bad lifter or bearing. If you ever replace an entire set of lifters on initial start it'll sound more similar to ping because all of the lifters are ticking. Bad bottom end bearings are a deeper louder clunk than a lifter tick because it's the rod banging the crank instead of the push rod banging the lifter. Pre ignition tends to hit all cylinders at the same time so it'll be very rapid clattering under acceleration only. That's also how you usually know it's pre ignition/spark knock/ping, it happens under acceleration/revving.
I just watched about 15 videos on youtube that were labeled spark knock and ping and none of them showed the sound to where you could hear it, and most were actually engine knocks and not ping.
02-03-2018, 12:54 PM
#49
TECH Apprentice
On my 2017 Silverado Double Cab Z71 I ran both 93 and e85 and was going for performance and mpg was not a concern. With my 93 tune I average 19mpg and on a trip from Michigan to Kentucky and back I averaged 22mpg. I run e85 for the performance gains. I average 13 mpg and on a trip to Chicago and back I average 16mpg with e85. That is with AFM disabled. With the cost of 93 here versus e85 even with the MPG loss I still save money using e85 which is a bonus since I run e85 for the performance. Now in a week it won't matter being the truck is getting a Circle D 3200 rpm converter installed. 
Klug Performance HP Tuners tune on my truck btw.
Klug Performance HP Tuners tune on my truck btw.