rb25/30

[GreyBeard]

M600 + Safeguard = FTW??????????????

Translation: Get a Safeguard to take care of knock and don't worry about a lack of knock control in current ECU's.
In my case, M800 + Safegaurd.
I forget phee, do you have an M600?

[phee]

Yeah I do.

[GreyBeard]

I don't know how skyline ignitions are setup, but J&S should have a compatible unit.

[Rz]

the reason these knock detectors/controllers dont work very well , or not accurately is that every engine has its own unique 'noises' going on.
very hard to design a box that knows exactly when knock is present over the general noise of everything else.
car companys spend big dollars on designing ecus & knock sensors that can pick up knock on a particular engine , most aftermarket ecu manufactors simply dont have the resources to do the same.
guy that tunes my car uses the good old microphone / headphones to listen for it.
supposed to be a very distinctive sound , allthough it fucks me how he hears anything over my noise my shitbox puts out.

[10sec rx7]

guy that tunes my car uses the good old microphone / headphones to listen for it.
supposed to be a very distinctive sound , allthough it fucks me how he hears anything over my noise my shitbox puts out.

you would be suprised what you can hear with these things on your head

[fatgts]

cant wait to get my 3 litre into the silvia

hope it goes half as well as that thing

[Rz]

you would be suprised what you can hear with these things on your head

haha i bet.
prolly hear lots of impending doom ....

[TonyJZX]

i heard you can hear the sound of $50 notes being torn up

[10sec rx7]

hahahah yep pretty much!!!

[BigMuz]

Translation: Get a Safeguard to take care of knock and don't worry about a lack of knock control in current ECU's.
In my case, M800 + Safegaurd.
I forget phee, do you have an M600?

I never knew there was such a thing. Cylinder specific advance and retard without programming. If it hears a knock, it retards that cylinder for the next cycle and then starts winding advance back in. You only have to set how quickly it comes back, and how much it should take out.

I'm fascinated.

Dale: Have a look at this box of tricks...
http://www.jandssafeguard.com/knockfinder.html

[GreyBeard]

They have a few nifty bits.
http://www.jandssafeguard.com/monitors.html

[KDog]

The J&S units are pretty good.


Aftermarket ECU knock controll is extremely difficult to get working. Knock is far to engine specific. Unless you use DSP and have records of every different engine setup.

I still prefer to tune properly using the old copper pipe and hose method.

[lukevl]

phee its pretty easy to build a stout twin cam RB- print the PM out I sent you and take it to someone who has a brain. Then you are well on your way.

[Rz]

needs a bf whos a mechanic , or at least had some experience in building motors ... would save bigtime on labour
otherwise its probably going to cost more than the cars worth to achieve what she wants performance wise.

[AxGT]

That'd be an interesting research project - using a DSP to try and isolate the pre-ignition in a lot of motors - obviously the human ear can do it.

Any EE's want to get on it - would be a good thesis project