More info ECT timing mod please

[parks5855]

Hi everyone, new to forum, first post, second valk, great site!     I am going to do the ECT mod on my bike but I have some questions first regarding the pot.  I don't understand how the position of the pot relates to the timing.  I would assume that all the way counter clockwise would be off, or zero advance?  And all the way clockwise would be full advance?  Is this correct?  And if not, how do you know what position on the pot relates to what timing effect?  Also without a pot, what is the effect on the timing then?  I appreciate any additional info you could give me, thanks, Brian

[John U.]

I think you are correct about clockwise being on and vice versa. The last approximately 1/4 turn in each direction doesn't have any effect. So the advance will be full on well before you run out of travel.
When the bike is in gear the ECT mod will cause an increase in idle speed of about 200rpm at full advance (which is 10 degrees). So we can assume that if you adjust the pot so that your idle speed increases by 100rpm (or 1/2 of the max increase) that your advance will be about 5 degrees.
Thats the easiest adjustment method. The other way would involve a timing light to figure out where to paint indicator marks to line up with the pot knob mark.
For me the rpm indicator is close enough.

[John U.]

By the way, welcome to the VRCC 

[DFragn]

When the bike is in gear the ECT mod will cause an increase in idle speed of about 200rpm at full advance (which is 10 degrees). So we can assume that if you adjust the pot so that your idle speed increases by 100rpm (or 1/2 of the max increase) that your advance will be about 5 degrees.

Question: Isn't there a difference between the Standard/Tourer & the I/S ICM integral cold advance maximum increase that the ECT takes advantage of?
I thought I had heard it was 2* between models. I could easily be wrong.

[John U.]

When the bike is in gear the ECT mod will cause an increase in idle speed of about 200rpm at full advance (which is 10 degrees). So we can assume that if you adjust the pot so that your idle speed increases by 100rpm (or 1/2 of the max increase) that your advance will be about 5 degrees.

Question: Isn't there a difference between the Standard/Tourer & the I/S ICM integral cold advance maximum increase that the ECT takes advantage of?
I thought I had heard it was 2* between models. I could easily be wrong.

[John U.]

DFragn, based on the advance curves I've seen I believe you are right, that would also be the reason a 4 degree trigger wheel is usually suggested for the I/S. I have the mod done on a Standard, but I keep the pot turned about 1/2 the way on. 10 degrees just seems like an awful lot of additional advance.

[Momz]

Just do the "simple ECT mod" and as long as you aren't using an I/S ICM, you're good to go!

Then replace your standard/tourer carb springs with I/S carb springs and you will notoce an immediate increase in response.

[parks5855]

Hey guys, thanks for the info, much appreciated!  I think I'm going to go with the pot, that way when I want to (easy cruisin days), I can turn it off and run regular gas instead of premium.  Now the next thing since this is a new (to me) bike is to figure out how to tell, or the easiest way to tell, if someone has installed a trigger wheel?  I prefer to run the ECT advance only as it won't kill my high end hp that way.  Thanks again for the info, Brian

[Davet261]

I am thinking about doing the ECT Mod over the winter too and I ran across this older post.  I am curious to know what the I/S ICM is. The I/s I can figure out, its the ICM I cant.....

[Blackduck]

Ignition control Module, The I/S has a little more advance than the tourer.
Cheers Steve

[Dirty Dave]

Good idea to use idle speed as a way to gauge degree of advance. I'm at about 300 rpm higher so I guess I'll tone it down a bit. BTW, as was mentioned, any dyno change with the ECT mod? Was wondering if Interstating my 97 Std with the ECT as well would change my previous 90 HP dyno result. Haven't been in to test since the mods.

[Ricky-D]

Hey guys, thanks for the info, much appreciated!  I think I'm going to go with the pot, that way when I want to (easy cruisin days), I can turn it off and run regular gas instead of premium.  Now the next thing since this is a new (to me) bike is to figure out how to tell, or the easiest way to tell, if someone has installed a trigger wheel?  I prefer to run the ECT advance only as it won't kill my high end hp that way.  Thanks again for the info, Brian

I think I understand your comment but I just want to point out that with no modifications you can run regular gas all the time in your bike. I'm sure you already know that!

I think if you have a trigger wheel that you can identify it easily since the stock wheel has cut-outs in it that make it look more wheel-like than the solid aftermarket trigger wheels.

If you do the etc mod and also have the trigger wheel you will surely be treading into dangerous territory, speaking motor-wise.

***

[98valk]

Good idea to use idle speed as a way to gauge degree of advance. I'm at about 300 rpm higher so I guess I'll tone it down a bit. BTW, as was mentioned, any dyno change with the ECT mod? Was wondering if Interstating my 97 Std with the ECT as well would change my previous 90 HP dyno result. Haven't been in to test since the mods.

http://timskelton.com/valkyrie/tech/trigger_wheel_plus_dyna3000.htm

anything above 26 Degrees at max rpm loses hp, both OEM ICMs do this @ 6000 rpm

using the I/S ICM with the ECT mod engage once the engine is above 150F is causing detnotion when RPMs are 2500rpms and lower. check the plugs with an eye piece. black spots =det.. silver spots severe det... SPs are from the piston top, both of these mild det... cannot be heard.