What is Knock Retard?
#1
Senior Member
Posts like a Turbo
Thread Starter
Join Date: Nov 2002
Location: Greenville, SC
Posts: 421
Likes: 0
Received 0 Likes
on
0 Posts
What is Knock Retard?
What is Knock retard? I've heard about it in many posts.. Tried to find the info myself, but had no luck.
#3
Senior Member
Posts like a Corvette
Join Date: Jan 2003
Posts: 1,250
Likes: 0
Received 0 Likes
on
0 Posts
And just to clarify knocking is when the gas in the cylinder explodes before top dead center and therefore doesnt help the spinning at all (and can damage the engine)... If im wrong someone say something, im purty sure, but not 100%
#4
Guest
Posts: n/a
Originally Posted by bmsgaffer86
And just to clarify knocking is when the gas in the cylinder explodes before top dead center and therefore doesnt help the spinning at all (and can damage the engine)... If im wrong someone say something, im purty sure, but not 100%
#6
Senior Member
True Car Nut
Join Date: May 2003
Location: Holt, MI & Lima, OH
Posts: 3,022
Likes: 0
Received 0 Likes
on
0 Posts
Just to add to this, knock is because of a warm condition or "hotspot" in the cylinder. When your engines knock sensors "hear" knock, the PCM will pull ignition timing depending on the amount of knock it "hears." 7 degrees of KR is supposed to pull 7 degrees of ignition timing. Since knock is caused by heat anything you can do to help intake air temps or anything like that will give you less KR, and if you open up the intake and exhaust it will do the same because the engine will be able to breathe easier.
Here is a knock retard write up written by a Grand Prix owner. It will explain just about anything you need to know about KR.
http://www.migpc.com/Email/Club_Bene...technical.html
Click on the link titled Knock Retard Document
Hope this helps.
Shawn
Here is a knock retard write up written by a Grand Prix owner. It will explain just about anything you need to know about KR.
http://www.migpc.com/Email/Club_Bene...technical.html
Click on the link titled Knock Retard Document
Hope this helps.
Shawn
#7
Senior Member
Posts like a Turbo
Join Date: Dec 2002
Location: Upper Left Coast
Posts: 299
Likes: 0
Received 0 Likes
on
0 Posts
Re: What is Knock Retard?
Originally Posted by Wolfedog50
What is Knock retard?
It was called 'discipline' back then.
Now, it'* called 'child abuse' and the world is full of disrespectful little ***** that are growing up to run the world amok and asunder...
OH. WAIT.
You mean the other kind of knock retard.
:P
#8
Senior Member
True Car Nut
Join Date: Aug 2003
Location: Salina, KS
Posts: 5,246
Likes: 0
Received 0 Likes
on
0 Posts
It'* also called "pinging" or more accurately called "detonation". I had that in my 1971 Ford Torino with a 351 Cleveland. Just had to back the timing off a bit, which on that engine, just turn the distributor clockwise a bit. But detonation can burn a piston or valves, so it'* important to keep tabs on. Now, you don't have to listen for it. A computer takes care of it! BTW, I traded that Torino for my 93 SSEi!! I miss 'er, but I LOVE my Bonnie!!!!
Thread
Thread Starter
Forum
Replies
Last Post
2000SilverBullet
Performance, Brainstorming & Tuning
35
04-10-2004 08:08 PM