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Old 08-28-2003, 06:48 PM   #1
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Default 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.
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Old 08-28-2003, 07:07 PM   #2
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Its your computer sensing spark knock and it retards your engine(timing) until it goes away....
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Old 08-28-2003, 08:23 PM   #3
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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%
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Old 08-28-2003, 11:21 PM   #4
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Quote:
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%
actually you are wrong. knock is when the fuel/air mixture ignites before the spark plug ignites it. the spark plug goes off before TDC, if someone says they are running 25 degrees of timing that means that the spark plug goes off 25 degrees before TDC and so on. get the idea?
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Old 08-28-2003, 11:55 PM   #5
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Thanks, now i knows more i was actually not too far off, that good to hear
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Old 08-29-2003, 12:52 AM   #6
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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
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Old 08-29-2003, 02:52 AM   #7
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Default Re: What is Knock Retard?

Quote:
Originally Posted by Wolfedog50
What is Knock retard?
This is what MY Dad used to do to me when I fukked up.
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
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Old 08-29-2003, 10:15 AM   #8
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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!!!!
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Old 08-29-2003, 07:19 PM   #9
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Mmmm....351 Cleveland....sexy.....
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Old 08-31-2003, 09:45 PM   #10
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Best engine Ford had, in my opinion. My Dad'* Torino would do 0-60 in 4.8 sec. and a 1/4 in the high 12'*. With no turbo, no SC, just raw power.
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