MSII,EDIS, AND Knock-Sensing-retard

tony2ltr · Post by **tony2ltr** » Tue Dec 20, 2005 9:12 pm

I have a MSII setup with EDIS that I have been running on the bench, but I will finally be wiring it into the car next week.
1. If I want active detonation control with this setup, can I wire in the "Experimental" knock circuit from msns-e?
2. Is there any way I can add to this circuit so that it makes a jump in the coolant temp datalog like Boris' knocksense?
3. I have an all aluminum block, should I use a knocksensor from a similar sized, aluminum engine, or will a standard GM knock sensor work?

Tony

IcantDo55 · Post by **IcantDo55** » Tue Jan 10, 2006 9:00 pm

Bump for ya, like to hear more on this too.

78Spit1500Fed · Post by **78Spit1500Fed** » Wed Jan 11, 2006 4:50 am

tony2ltr wrote:...1. If I want active detonation control with this setup, can I wire in the "Experimental" knock circuit from msns-e?

Yes, but it won't do anything. There's no software (yet) to handle knock. You can just log it.

tony2ltr wrote:2. Is there any way I can add to this circuit so that it makes a jump in the coolant temp datalog like Boris' knocksense?

I guess you could... it would be easier to log it by itself. There are instructions in MegaTune on how to do this.

tony2ltr wrote:...3. I have an all aluminum block, should I use a knocksensor from a similar sized, aluminum engine, or will a standard GM knock sensor work?

I'm not sure that the block material matters. What I understand about knock sensors is that they're tuned to the cylinder dimensions. (The resonance of the cylinder, not the material around it.)

-Brian

tony2ltr · Post by **tony2ltr** » Wed Jan 11, 2006 7:15 am

I just figured the metal would affect the way the sound is transmitted.

Is there any planning for knock retard for MSII?

Tony

Post by **grippo** » Wed Jan 11, 2006 7:17 am

Lance is bench testing it (version 2.53) now.

tony2ltr · Post by **tony2ltr** » Wed Jan 11, 2006 7:19 am

Wow that was a fast reply! It should work ok for first batch MSII right?

IcantDo55 · Post by **IcantDo55** » Wed Jan 11, 2006 8:29 am

grippo wrote:Lance is bench testing it (version 2.53) now.

Put me on the list! What knock sensor does it use and what knock censor controler?

Thanks!

78Spit1500Fed · Post by **78Spit1500Fed** » Wed Jan 11, 2006 10:34 am

tony2ltr wrote:I just figured the metal would affect the way the sound is transmitted.

I thought the same thing, but if you think about it, the block will have no natural resonance that is meaningful when compared to all the other "noise" in the system.

Sure, the block will resonate... put it on a stand and whack it with a mallet and it will ring, but compare that tiny amplitude to the explosion in the cylinder! The resonance is determined by the dimensions of the cylinder and the sound is simply transmitted through the block.

-Brian

tony2ltr · Post by **tony2ltr** » Thu Jan 12, 2006 4:29 pm

so, using a knock sensor from an engine with a similar bore and stroke would be the best way to go then.

Anyone know what engines our there use a 3.530 bore?

TONY

Post by **grippo** » Thu Jan 12, 2006 9:08 pm

tony2ltr wrote:Wow that was a fast reply! It should work ok for first batch MSII right?

2.x code will not work with the non-CAN MS II - there is not enough memory and the fuel pump and idle are on different pins. The best you can do is extract the knock retard code from 2.5 and put it in 1.3

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MSII,EDIS, AND Knock-Sensing-retard

MSII,EDIS, AND Knock-Sensing-retard

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