hello, i am wondering if you need a wideband to accuratly look at the knock sum the car makes. now when i click on the knock sum there is none but i was wondering if i need a wideband to do it.

Thanks

 

no...

it might just be that you dont knock...

 

and if there is no knock then there is no chance of me blowing my motor any time soon?

 

i just checked and i have 1-2 counts around 6300 to 6400 rpms. is that bad or is it acceptable?

 

thats ok.... no knock is best, otherwise less than 4 is ok...

 

well id say its acceptable, my car is running weird, i have a vendor here working on the email flash, im going to have to lower my boost down to 21 again, otherwise leaving it at 23.5-24 im knocking as high as 18 counts around 7100rpm and a consistent 6-9 from 6300 rpms so id say 1-2 counts is good, or you can pull timing one degree and possibly get none

 

Thanks for the info

 

18 is very high - I wouldnt drive on boost in those areas until you get tuned!

 

To answer your original question regarding a wideband- it is used to measure your Air/Fuel Ratio, that is how many parts air: to 1 part fuel. This is extremely useful for tuning to adjust your High and/or Low Octane fuel maps.

However, without this guauge, one can look at knock sum to tune your high octane map- richening the mixture or adjusting timing when you see counts of knock.

If you see a count of 6+ knock, your evo's ECU will divert to the low octane fuel map as a safety net.

I'd say if you are not seeing any knock it is because you don't have any- meaning that your car is tuned well or perhaps you could lean it out more until you see knock counts and then adjust timing for maximum power.