Great Article on detonation/preignition
#74
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Joined: Jan 2011
Posts: 956
Likes: 2
From: NE Indiana
Grab a large coffee for this read. But I found it very interesting. Helps explain whats really going on inside a cylinder.
http://www.streetrodstuff.com/Articl...tion/index.php
http://www.streetrodstuff.com/Articl...tion/index.php
#75
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Joined: Feb 2011
Posts: 2,640
Likes: 4
#76
Great article, BTW. How many folks are running knock sensors on their engines to tell them if they are detonating? Even without FI, it would seem like a helpful thing to have, even if simply wired to a large red idiot light on the dash to tell you to back off if any detonation is picked up.
Page 20,23 http://www.boatfix.com/merc/Servmanl/16/16B4R2.PDF
http://www.amazon.com/ACDelco-216-47.../dp/B000C9K43M
http://www.ebay.com/sch/i.html?_odkw...56288&_sacat=0
http://www.amazon.com/ACDelco-PT2367.../dp/B00554624O
Last edited by Rookie; 11-06-2013 at 07:50 PM.
#77
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Joined: Jan 2006
Posts: 3,865
Likes: 793
From: St. Pete Beach, FL
I'll share what I am doing for knock monitoring. I am using ESC Knock Module 16128261 and Knock Sensor 10456288. The module supplies a constant 8-10v when no knock is present. When the module senses knock from the sensor it will drop out the 8-10v. I will have this voltage hooked up to a normally close relay. I will have the contact side of the relay to ground. When the knock module senses knock it will pull out the voltage closing my relay. This will then ground my knock retard on my Crane HI-6M knock signal wire and then the module will pull out my desired timing. This could be hooked up to other ignitions. Maybe start retard or something else. This will also close the circuit for the light on my dash to inform me knock has been sensed.
Page 20,23 http://www.boatfix.com/merc/Servmanl/16/16B4R2.PDF
http://www.amazon.com/ACDelco-216-47.../dp/B000C9K43M
http://www.ebay.com/sch/i.html?_odkw...56288&_sacat=0
http://www.amazon.com/ACDelco-PT2367.../dp/B00554624O
Page 20,23 http://www.boatfix.com/merc/Servmanl/16/16B4R2.PDF
http://www.amazon.com/ACDelco-216-47.../dp/B000C9K43M
http://www.ebay.com/sch/i.html?_odkw...56288&_sacat=0
http://www.amazon.com/ACDelco-PT2367.../dp/B00554624O
I'd be curious to know how quickly it reacts.
#78
#79
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Joined: Jan 2011
Posts: 956
Likes: 2
From: NE Indiana
I took apart my 350's last month and found two of my pistons with the four point scuffing damage, clearly damage that happened when we ran it with the timing too far advanced. Lucky for me, I did not run it much as there was no damage to the block or rings, just the start of it on two pistons. So I did some searching on knock sensors.... found this:
www.knockgauge.eu after doing a google search. Read about it in a thread from back in 2006 on using it for boost engines in cars, I think Miata's. Whatever, they had really good results with it. $50 each, couple week delivery from Europe.
Summit racing also sells the Casper knock gauges for around $80. Another one out there I read about, but was on Ipad and fell asleep, didn't save the page.
Brian
http://www.fastforwardsuperchargers....n-Device/page7
This was the thread that they discussed the device
www.knockgauge.eu after doing a google search. Read about it in a thread from back in 2006 on using it for boost engines in cars, I think Miata's. Whatever, they had really good results with it. $50 each, couple week delivery from Europe.
Summit racing also sells the Casper knock gauges for around $80. Another one out there I read about, but was on Ipad and fell asleep, didn't save the page.
Brian
http://www.fastforwardsuperchargers....n-Device/page7
This was the thread that they discussed the device
Last edited by befu; 11-10-2013 at 01:29 PM.




