Offshoreonly.com - Great Article on detonation/preignition

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i like turtle sundays.

Found a great deal on a used car for all you turtle lovers:

http://i.cnn.net/money/popups/2006/f...turtle_gal.jpg

In my best Shelby Stanga voice....... We having Turtle soup tonight junior!!!

Quote:

Originally Posted by MILD THUNDER (Post 4018369)

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

Thank you for posting this, very interesting. The first 1 1/2 pages of this thread are interesting and helpful also. Beyond that, the turtle mating picture was the only other thing I learned, even if was very disturbing! Gotta tell the wife, we have to try it turtle style

Quote:

Originally Posted by befu (Post 4020548)

I've always said that it's just amazing the things you can learn from OSO! :)

Quote:

Originally Posted by Budman II (Post 4018576)

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.

Quote:

Originally Posted by ICDEDPPL (Post 4018730)

You read my mind.. thats on the winter project list!

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

Quote:

Originally Posted by Rookie (Post 4022899)

awesome

I'd be curious to know how quickly it reacts.

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Originally Posted by korvetkeith (Post 4022914)

awesome

I'd be curious to know how quickly it reacts.

Almost instantaneous, it's solid state electronics except for the Bosch relay. And a relay is almost as fast.

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