God damn.....

I've been playing with these units for 2yrs now and i can't believe all this time I was under the impression that when you disable the knock sensor error in Romeditor, that you are not actually disabling the knock sensor timing retard, only the errors!!!

That can explain alot when I've been tuning cars and getting all sorts of strange occurances at high boost and then looking back at the timing advance on the Datalogger seeing so much timing pulled.

Well, you learn something new every day!

 

Good to know.

 

Ah the beauty of P28's. I saw this occuring before as well on a p72 that I tuned, but didnt make the connection either.

 

yea, p28s are nice and thats what i used to run since i had a skunk 2 mani.
but for those who want to keep their stock dual runners and use the p72, unless you physically unplug the knock sensor, it will pull timing and i'm talking lots of timing. here's a graph.....



here's another that looks as it should:

 

there's all sorts of weirdness going on there in the timing. This car would run a couple strong runs (500HP at 18psi) then all of a sudden would run like crap! I don't know if he has a bad sensor somewhere or if his ignition is bad. i'll have to look at more stuff

 

For P72 roms, change the BYTE at address 5467 to 00 to TOTALLY disable the knock

If you dont kno what i'm talking about, open up the hondata rom bin with a hex editor, goto address 5467 (hexadecimal), and change that byte to 00.

 

Why on gods green earth is their more than 30 degrees of ignition timing under boost? Thats crazy! Isn't their preignition?

 

that timing there is total advance. distributor + ignition. so subtract 16 deg to get the ignition advance. highest timing in boost is about 22 deg ign advance

 

If the distributor is set to 16 degrees base and teh ecu advances 30 degrees why do you subtract it? I could see if the distributor was set 16 degrees retarded and the ecu then advances 30 degrees from their. Is that what is going on?

 

ur subtractign cuz hondata already added the base timing to the ecu's timing in the graph.

 

hmmmk, dont thank me for the knock sensor disabling code Noone likes me

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by UberTeg &raquo;</TD></TR><TR><TD CLASS="quote">hmmmk, dont thank me for the knock sensor disabling code Noone likes me </TD></TR></TABLE>

I think its neat that you know that. but doubt that many will try.

 

damn uberteg u sounded smart.........heheheh just messing with u.....how the hell did u know that? what book u been reading?

 

I might try that after I re-route my oil return line into my dipstick tube.

 

good info here! it's good to know the facts mentioned about the ECU's and Hondata.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by UberTeg &raquo;</TD></TR><TR><TD CLASS="quote"> Noone likes me </TD></TR></TABLE>


best post ever!

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by G2 Pilot &raquo;</TD></TR><TR><TD CLASS="quote">


best post ever!</TD></TR></TABLE>

-werd-

 

Thanks uberteg

it is good to know, I have my knock sensor disabled.

knock sensors are not fun

 

Thats good to know but i would just hook up the knock. unless it was a lsvtec in a 88 91 or lsvtec in a 2-5 with a gsr ecu. also if you actually connect the knock some how to the block?? any input that?? i am curious.

 

you lost me at knock sensor.. but good to know youre on top of things.

 

WHy disconnect the knock sensor? Its their to pull timing and save the engine when detonating right? WHy not tune out the detonation?

 

Cus it also likes to pull engine timing when there's loud noises, etc....like big turbos spooling like a madman.

Suprdave

 

With the AEM you can log how much knock your engine makes under normal conditions. Then when the knock sensor goes above the knock threashold you can set it to pull as little or as much timing as you like.

Bottoz

 

Easy solution to this, pull the knock sensor plug off the sensor or use a p28 ecu. Even using the binary code in the hexidecimal like Uber said will work. Now that I have realized this I am just going to pull off the knock sensor plug when I tune p72 ecu's.

BTW, the knock sensor pulls back timing in unwanted amounts. You dont have any control over it at all. If you are detonating its already to late, the knock sensor wont save your ***.

 

Thats good to know but i would just hook up the knock. unless it was a lsvtec in a 88 91 or lsvtec in a 2-5 with a gsr ecu. also if you actually connect the knock some how to the block?? any input that?? i am curious.
_______

Go to this link: http://www.c-speedracing.com/h...c.php
They show an LS/Vtec build up, and they show how they put the knock sensor into the block.