Knock Sensor Test

[BloodBath]

I have a Nissan 240sx with an RB25DET. It has an AEM Stand alone EMS. I have had it lean under boost and never seen Knock...

I was wondering the procedure for testing the knock sensor circuit before I put in race gas and start adding timing.

Thanks

[89CAL]

AFAIK they have to be removed and tested with an oscilliscope, but you must know the frequency at which the sensors register knock as well

[Rolls]

Buy knock ears, the only 100% reliable way to tune a car and listen for knock.

[JonnoHR31]

lean mixtures wont always induce knock, timing has a much bigger effect.

[Room42]

lean mixtures wont always induce knock, timing has a much bigger effect.

Exactly right.

[Rolls]

lean mixtures wont always induce knock, timing has a much bigger effect.

Especially when it is winter and the temps are cool.

[BloodBath]

thanks guys. It was very hot out side, like 105 and 12.8 afr, stock turbo 12 psi. didnt register any knock. I have changed my intake air calibration since then.

[STATUS]

I doubt the EMS is connected to the knock sensors....

[BloodBath]

Its gotta be. its plug and play.

[mattis96]

Aren't the haltechs plug and play and they don't use the knock sensors as well?

[STATUS]

Its gotta be. its plug and play.

Most plug and play dont use the knock sensors, what model ems?

[BloodBath]

its an aem ems, series 2 for the r33 rb25. It has knock charts on the program on my laptop. it just always reads 0. Ill mess with it and see if I can get a fast stock turbo video up for you guys. I wish I was playing around at sea level!!!

John

[Beer Baron]

lol. it always read 0.... guess what that means.........

[STATUS]

its an aem ems, series 2 for the r33 rb25. It has knock charts on the program on my laptop. it just always reads 0. Ill mess with it and see if I can get a fast stock turbo video up for you guys. I wish I was playing around at sea level!!!

John

Sorry here in AUS we have AEM stinger and motorsport ecu's which are different from the US based AEM version 2.. in fact they are not even similar. I JUST NOTICED your location is USA or similar.

The AEM Version 2 is an AWESOME ecu and we tune a fair few turbo hondas and some bigger hp supra stuff with them, YES it does have knock control and feedback engines but ive not had a play with one in a R33, it worked awesome on a turbo S2000 we did.

I have a feeling it wont be compatible with the std RB25 sensors, but send Aem an enquiry as to whether ot not they are supported as its a great feature in the Version II.

Aem Version II

http://www.importpartspro.com/306621r33rb26dett.html

our Local AEM product range:

http://www.enginemanagement.com.au/product_info.php?products_id=107

Its kinda like comparing apples to oranges

[BloodBath]

lol. it always read 0.... guess what that means.........

I guess that means no knock??? haha

[BloodBath]

Sorry here in AUS we have AEM stinger and motorsport ecu's which are different from the US based AEM version 2.. in fact they are not even similar. I JUST NOTICED your location is USA or similar.

The AEM Version 2 is an AWESOME ecu and we tune a fair few turbo hondas and some bigger hp supra stuff with them, YES it does have knock control and feedback engines but ive not had a play with one in a R33, it worked awesome on a turbo S2000 we did.

I have a feeling it wont be compatible with the std RB25 sensors, but send Aem an enquiry as to whether ot not they are supported as its a great feature in the Version II.

Aem Version II

http://www.importpar...33rb26dett.html

our Local AEM product range:

http://www.engineman...products_id=107

Its kinda like comparing apples to oranges

Yea it is definitely a very cool program. I have done all the tuning myself so far, just by data logging runs at the strip and third gear pulls. The weather is kinda shit right now. but I am very excited to see what this rb 25 has got in the future.