How much knock is 0.4* retarded timing

[ChiGGz]

This is all I see, is it 5 degrees or .5 degrees that i should be worrying about? Im using dsmlink

 

[justin0469]

5* is your timing and its fine.

 

[ChiGGz]

5* is your timing and its fine.

* probably stands for degree without going into ascii characters and such right?

 

[justin0469]

that is correct

 

[ChiGGz]

Thanks for your help Justin.

One more question. 0.4* knock...what are the chances of this being phantom knock? I also noticed this same amount only once @ idle.

 

[justin0469]

correct me if im wrong but degrees is a measurement of how far the engine has rotated after TDC or how far it needs to go before it reaches TDC. knock is measured in counts and is just how many times it knocked. so they would only be whole numbers. thats how i understand it. so i could see 4 counts of knock at 5* ATDC (example) but i dont know what 5* knock is. and i dont know much about phantom knock but im sure just searching for "phantom knock" will reveal others' experiences with it and when it usually happens

 

[ChiGGz]

correct me if im wrong but degrees is a measurement of how far the engine has rotated after TDC or how far it needs to go before it reaches TDC. knock is measured in counts and is just how many times it knocked. so they would only be whole numbers. thats how i understand it. so i could see 4 counts of knock at 5* ATDC (example) but i dont know what 5* knock is. and i dont know much about phantom knock but im sure just searching for "phantom knock" will reveal others' experiences with it and when it usually happens

Hmm..interesting. Well the degrees of which im talking about I obtained from a DSMlink reading. What you say does make sense...can someone help clear this up?

TIA

 

[keymaster]

ChiGGz, you're talking about the DSMLink function of providing a knock sensor for 2G's, by telling you how much the timing has been retarded because of knock. yours is being pulled by 0.4*. I wouldn't say that's anything to worry about, but I'd add a bit of fuel just to be safe.

 

[justin0469]

so what i was saying was correct, just needed to be applied in the correct way.

 

[ChiGGz]

ChiGGz, you're talking about the DSMLink function of providing a knock sensor for 2G's, by telling you how much the timing has been retarded because of knock. yours is being pulled by 0.4*. I wouldn't say that's anything to worry about, but I'd add a bit of fuel just to be safe.

Thanks for clearing that up. But how does one translate 0.4* retarded into a knock count.

 

[justin0469]

such a small pull in timing implies an insignificant amount and severity of knock

 

[doug]

1 count of knock = .35 degrees of timing retard. So about 3 counts of knock is one degree of timing that gets pulled. Just log knock in conjunction with timing and you can see the correlation.