somebody help me detect knock
Jamie
jhosick at sympatico.ca
Tue Nov 21 06:54:52 GMT 2000
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Bruce,
Reading the plugs won't help much if the crank's buried in the road. I =
never dyno'ed the old motor but it would break loose in 4th with 3.73's =
and 255's. The thing that killed it was the ACT function adding timing =
when the NOS was on. I pulled extra timing in my nos program only to =
have the EEC add more than I had pulled when the intake went cold. I =
was hoping I could easilly use a sensor to kill the spark. How do these =
sensors work? Do they use something to convert the sensor's output into =
something meaningful? I just didn't think it would be a big pain to set =
one up, MSD sells a knock alert for just over 100 bucks.
----- Original Message -----=20
From: Bruce Plecan=20
To: diy_efi at diy-efi.org=20
Sent: Tuesday, November 21, 2000 1:01 AM
Subject: Re: somebody help me detect knock
Your out of luck.
If your making that HP, and not reading plugs your way over your head =
IMO.
the oems and MSD use acoustic devices, they are not absolutely fool =
proof.=20
They just listen for a noise that sounds about like knock.
Only good system that makes sense to me is the Saab Ion stuff, and =
that is a saab only so far.
Lacking anything else though look at the 89 Third Gen =
Camaros/Firebirds for one of there K/S and ESC contol module. Then use =
the output from that as a trigger for a light (thru addition drivers)
Bruce
I want to throw together a knock sensor for my mustang. I have no =
experience with them at all. Anybody know how I should go about this? =
What sensor, where to mount it, how to hook it up etc. I was thinking =
about rigging it up to kill the power to the MSD box.
Next spring I'll be well past the point where knock not only blows the =
gasket or pistons, but could split the block. I'm moving to a T-Trim =
with new heads and custom cam. Add the EEC tuner to the mix and I'm a =
keystroke away from accidentally killing the fresh motor.
Even a suggestion as to which sensor I should use and possibly a data =
sheet for it would be helpful.
Thanks for any help.
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<META http-equiv=3DContent-Type content=3D"text/html; =
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<META content=3D"MSHTML 5.50.4522.1800" name=3DGENERATOR>
<STYLE></STYLE>
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<BODY bgColor=3D#ffffff>
<DIV><FONT face=3DArial size=3D2>Bruce,</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT> </DIV>
<DIV><FONT face=3DArial size=3D2>Reading the plugs won't help much if =
the crank's=20
buried in the road. I never dyno'ed the old motor but it would =
break loose=20
in 4th with 3.73's and 255's. The thing that killed it was the ACT =
function adding timing when the NOS was on. I pulled extra timing =
in my=20
nos program only to have the EEC add more than I had pulled when the =
intake went=20
cold. I was hoping I could easilly use a sensor to kill the =
spark. =20
How do these sensors work? Do they use something to convert the =
sensor's=20
output into something meaningful? I just didn't think it would be =
a big=20
pain to set one up, MSD sells a knock alert for just over 100=20
bucks.</FONT></DIV>
<BLOCKQUOTE dir=3Dltr=20
style=3D"PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; =
BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px">
<DIV style=3D"FONT: 10pt arial">----- Original Message ----- </DIV>
<DIV=20
style=3D"BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: =
black"><B>From:</B>=20
<A title=3Dnacelp at bright.net href=3D"mailto:nacelp at bright.net">Bruce =
Plecan</A>=20
</DIV>
<DIV style=3D"FONT: 10pt arial"><B>To:</B> <A =
title=3Ddiy_efi at diy-efi.org=20
href=3D"mailto:diy_efi at diy-efi.org">diy_efi at diy-efi.org</A> </DIV>
<DIV style=3D"FONT: 10pt arial"><B>Sent:</B> Tuesday, November 21, =
2000 1:01=20
AM</DIV>
<DIV style=3D"FONT: 10pt arial"><B>Subject:</B> Re: somebody help me =
detect=20
knock</DIV>
<DIV><BR></DIV>
<DIV><FONT face=3DArial size=3D2></FONT> </DIV>
<DIV><FONT face=3DArial size=3D2>Your out of luck.</FONT></DIV>
<DIV><FONT face=3DArial size=3D2>If your making that HP, and not =
reading plugs=20
your way over your head IMO.</FONT></DIV>
<DIV><FONT face=3DArial size=3D2>the oems and MSD use acoustic =
devices, they are=20
not absolutely fool proof. </FONT></DIV>
<DIV><FONT face=3DArial size=3D2>They just listen for a noise that =
sounds about=20
like knock.</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT> </DIV>
<DIV><FONT face=3DArial size=3D2>Only good system that makes sense to =
me is the=20
Saab Ion stuff, and that is a saab only so far.</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT> </DIV>
<DIV><FONT face=3DArial size=3D2>Lacking anything else though look at =
the 89 Third=20
Gen Camaros/Firebirds for one of there K/S and ESC contol =
module. Then=20
use the output from that as a trigger for a light (thru addition=20
drivers)</FONT></DIV>
<DIV><FONT face=3DArial size=3D2>Bruce</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT> </DIV>
<DIV><FONT face=3DArial size=3D2></FONT> </DIV>
<DIV><FONT face=3DArial size=3D2>I want to throw together a knock =
sensor for my=20
mustang. I have no experience with them at all. Anybody =
know how I=20
should go about this? What sensor, where to mount it, how to =
hook it up=20
etc. I was thinking about rigging it up to kill the power to the =
MSD=20
box.</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT> </DIV>
<DIV><FONT face=3DArial size=3D2>Next spring I'll be well past =
the point=20
where knock not only blows the gasket or pistons, but could =
split=20
the block. I'm moving to a T-Trim with new heads and custom =
cam. =20
Add the EEC tuner to the mix and I'm a keystroke away=20
from accidentally killing the fresh motor.</FONT></DIV>
<DIV><FONT face=3DArial size=3D2>Even a suggestion as to =
which sensor I=20
should use and possibly a data sheet for it would be =
helpful.</FONT></DIV>
<DIV><FONT face=3DArial size=3D2>Thanks for any=20
help.</FONT></DIV></BLOCKQUOTE></BODY></HTML>
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