Geneqco

I think by ML3.1 he means the version of Motronic the 951 uses and 15us I think would mean 15 micro seconds... I'm sure he will let us know for sure when he reads your post.

Transaxle

Thanks...

No. As I tried to explain, there is a final stage or amplifier onboard of the DME, that controls the coil. You may want to replace this with external output stages like those used in the later M2.1 (944 S/S2) if you need to remove the DME. Don't connect the KLR directly to the coil...

But why do you want to replace the DME ? It is very flexible and very easy to program.

gt37vgt

yeh i think i will go piggy back its mainly the cheapest way to go data log anitlag and multi coil

gt37vgt

and i think we need to talk about "easy to programe" perhaps i will go that way

Geneqco

So Transaxle, How many degrees is the three teeth... or how many teeth on the flywheel?

Thanks.

gt37vgt

well think i'm going to cop out of this research I found an easire solution . in the klr and some ecus there is a magic little module that listens for the knock and then sends an out put . legend has it that you can get it out of various cars . but here it is cheap as chips .
http://www.viatrack.ca/ so if your ecu has a auxilery input your done my auxillary input will be set up in Nitros mode so when its triggered it will add feul and take timing

Geneqco

Not sure how effective it would be at filtering out noise and tuning in to the specific frequencies... that's the main reason I'm trying to stick with the KLR. I think I'v egot it pretty much sorted but just need to work out how many degrees the three teeth Transaxle was talking about equate to.

Do you know how many teeth on the flywheel?

gt37vgt

i think you will find it has a simmilar active ingrediant to the klr I will hook it up while my car still has the klr and check that it signals as well as the klr does . i may loose the multi stage affect the klr has .
so does the klr send the knock event signal for any knock or just for the big knocks.
or one signal if it detects 20 knocks ?
my main concern is will my set up respond fast enough.

If you the KLR to avance or delay the crank pick up or the unamplified ignightion trigger i'm sure you will be fast enough.
and i believe there is 132 little blocks / teeth for the speed sensor didn't we go through this eirlier in this thread?

Geneqco

Yes, sorry, I just looked back and found that - I knew i saw it somewhere.

As for outputs from the KLR for knock... i believe it outputs for all knock events but you must have a sample rate of at least 1000 per second. Transaxle postd soemthing in another thread showing the output from Pin 15 of the KLR for an engine with bad knock (low octane fuel). It had mostly 5v spikes but also had some at 2.5v.

132 teeth... so 3 teeth would be 360 / 132 x 3 = 8.18 degrees?

gt37vgt

hmmm and the little box i linked you gave out 5 volt spikes they say you can overlay it on your temp guage for data logging as temp is pretty flat i'll just need amp it up a tad to get it to trigger the input on my ecu or even set up a timer on it so it engages for a second while you sweap through Max torque (ping land) .
you know that most tuners believe that O2 sensors and knock sensors are only safe running cosed loop at modest load not high load .

Geneqco

My understanding is that TQ generally peaks around 2 degrees before the onset of knock. So, i'm really looking at having a properly tuned engine and generally not venturing into knock land. I really see the KLR as a 'just in case' protective device.

Geneqco

I guess the only thing left to answer is what type of output to use... it needs to be at least 15 micro seconds, but is there anything else about its form someone can tell us... voltage etc

Thanks

gt37vgt

i will check it out with my new occiliscope but if you cant wait buy one your self for 100 bucks

Geneqco

Where do you get a scope for $100?

Oh, and Happy Birthday for Monday!

gt37vgt

http://cgi.ebay.co.uk/ws/eBayISAPI.d...2972943&rd=1,1
ebay item number 180122972943 he has no listing at the moment but i think this is email dv38@btinternet.com.
cheers got my self a few pressies seems i've now got a 400hp bolt on set up for the 2.5 to tide me over til the 3.0 is done