What exactly is knock and ping?
07-22-2002, 10:26 AM
#1
Honda-Tech Member
Thread Starter
What exactly is knock and ping?
I feel like I should know this 
"Search" didn't help much. Could someone please point some info out to me! 
"Search" didn't help much. Could someone please point some info out to me!
07-22-2002, 11:39 AM
#2
Honda-Tech Member
Join Date: Oct 2000
Location: Philadelphia, PA, USA
Posts: 413
Likes: 0
Received 0 Likes
on
0 Posts
Re: What exactly is knock and ping? (legendboy)
Detonation results when part of the unburned fuel mixture explodes violently. because the pressure rises so quickly that parts of the engine vibrate. hence, engine knock.
preignition results when an overheated surface in the combustion chamber ignites the fuel mixture. now, ping is a light tapping sound that can be heard during preignition.
preginition is similar to detonation, but the actions are reversed. detonation begins AFTER the start of normal combustion. preignition begins BEFORE the start of normal combustion.
i hope i didn't confuse you more
preignition results when an overheated surface in the combustion chamber ignites the fuel mixture. now, ping is a light tapping sound that can be heard during preignition.
preginition is similar to detonation, but the actions are reversed. detonation begins AFTER the start of normal combustion. preignition begins BEFORE the start of normal combustion.
i hope i didn't confuse you more
02-23-2003, 10:48 AM
#4
Member
Join Date: Aug 2001
Location: Starbucks Most, Likely
Posts: 5,664
Likes: 0
Received 0 Likes
on
0 Posts
Re: What exactly is knock and ping? (zeno)
Very good explanations --- from my limited experience I would have to lean towards Detonation as being much more destructive....very hardcore detonation can blow a motor nicely....and has, many times.
[Modified by neo1z, 2:53 PM 2/23/2003]
[Modified by neo1z, 2:53 PM 2/23/2003]
02-23-2003, 10:52 AM
#5
Join Date: Jan 2003
Location: Los Angeles, ca, US
Posts: 258
Likes: 0
Received 0 Likes
on
0 Posts
Re: What exactly is knock and ping? (neo1z)
I found out recently that the knocking noise is actually the cylinder walls vibrating, I use to think it would either be the rods or the pistons or something of that nature, go figures.
Trending Topics
02-23-2003, 11:16 AM
#8
Join Date: Aug 2002
Posts: 84
Likes: 0
Received 0 Likes
on
0 Posts
Re: What exactly is knock and ping? (NightmareApex)
no thats cheap gas/ low octane the gas is not burning clean and is still trying to combust.
02-24-2003, 05:58 AM
#9
Re: What exactly is knock and ping? (zeno)
Another question; why do I hear that knocking sound coming from the engine after I turn off the car? Is it related to knock and preignition?
02-24-2003, 09:10 AM
#10
Join Date: Aug 2002
Posts: 84
Likes: 0
Received 0 Likes
on
0 Posts
Re: What exactly is knock and ping? (JimBlake)
Another question; why do I hear that knocking sound coming from the engine after I turn off the car? Is it related to knock and preignition?
Describe what you mean by a knocking sound AFTER YOU TURN OFF THE CAR. Knocking, preignition, detonation all are happening while the engine is running. After you turn off the engine its normal to hear some creaking & tapping noises which are just the parts of the engine moving as they cool off.
Describe what you mean by a knocking sound AFTER YOU TURN OFF THE CAR. Knocking, preignition, detonation all are happening while the engine is running. After you turn off the engine its normal to hear some creaking & tapping noises which are just the parts of the engine moving as they cool off.
Thread
Thread Starter
Forum
Replies
Last Post
caleb423
Engine Management and Tuning
5
06-22-2011 06:45 PM
TsunamiZC
Acura Integra Type-R
19
12-10-2002 12:10 PM