Hearing conflicting things about knock sensor + esc pairings

I went from 305 to 355 and am now logging LOTS of knock. I am told by some to move to 350 knock sensor, others say I need 350 knock sensor + matched esc module. I've also been told there is no difference in the sensors...


Looking for specifics. I want a properly functioning knock system - if its real knock (which I cannot tell) - I want to know, but want to remove the false knock.

I'd prefer not to spend the $100 on a new sensor + esc, but if thats the fix, then I will gladly do it.

Anyone have references on this topic you can point me to - thanks!

 

The acoustic signature that represents detonation, is in large part a function of cylinder bore. If your an oem and splitting hairs with the EPA you have to be pretty close with it's calibration.

For the C3 series of ecms, they listed like 5 different sensors, and a few different modules. After playing with all of them and spending alot of time, it seems like there was 2-3d between them. I wound up with the sensor, and module from a 3.8 to get what I wanted.

And even the tune can mask it's proper operation.

If you want a known then get all new.
If you want to experiment, get a new sensor, and then some modules from the junkyard, and see what you get.

When you're done, you need to check plugs anyway, since the K/S system is by no means perfect.

 

The knock sensor part is true

the 305 and the 350 use a different KS. When you install it, do not use teflon tape, do torque it to 15 ft lbs. If you over tighten it, you will pick up false knock

I have not heard of the ignition module being paired with the KS. I didn't pair my up when I did my 305 to 350 swap.

Hope that helps

 

Thank you for the quick responses!

 

not to hijack the thread, but what k/s would one use for a 406?