[Diy_efi] Timing injectors with an oscilloscope ?
Ray Roberts
rroberts2 at charter.net
Thu Apr 24 16:06:07 GMT 2003
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Hi
Just wondering if any of you have ever used a a scope to sync the =
injectors with the ignition ?
MSD has a Chevy cam sync(hall effect) unit that fits in the distributor =
hole so you can adjust
the injector sync just like adjusting the timing. Since we're building a =
high rpm engine we
want the utmost performance from our sequential fire setup.
I am planning on using a 2 channel scope & calculate the degrees between =
the injector
pulse & the ignition pulse by using the rpm & the milliseconds between =
the injector pulse &=20
the ignition pulse. I realize it's going to be hard tokeep a steady =
enough rpm to get a close=20
degree setting based on the milliseconds between the injector/ignition =
pulses.
Also I've wondered if it would be a lot easier to use a 3 channel scope =
& set the #1 injector=20
pulse about halfway between the two corresponding ignition pulses ? Any =
thoughts/ideas any=20
of you have on this would be greatly appreciated.=20
One more thing----has anyone had any experience with Russ Collins =
injectors ? All of his=20
products/services seem very nice but very expensive.
Ray Roberts
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<DIV><FONT face=3DArial size=3D2>Hi</FONT></DIV>
<DIV> </DIV>
<DIV><FONT face=3DArial size=3D2>Just wondering if any of you have ever =
used a a=20
scope to sync the injectors with the ignition ?</FONT></DIV>
<DIV><FONT face=3DArial size=3D2>MSD has a Chevy cam sync(hall effect) =
unit that=20
fits in the distributor hole so you can adjust</FONT></DIV>
<DIV><FONT face=3DArial size=3D2>the injector sync just like adjusting =
the timing.=20
Since we're building a high rpm engine we</FONT></DIV>
<DIV><FONT face=3DArial size=3D2>want the utmost performance from our =
sequential=20
fire setup.</FONT></DIV>
<DIV> </DIV>
<DIV><FONT face=3DArial size=3D2>I am planning on using a 2 channel =
scope &=20
calculate the degrees between the injector</FONT></DIV>
<DIV><FONT face=3DArial size=3D2>pulse & the ignition pulse by using =
the rpm=20
& the</FONT><FONT face=3DArial size=3D2> milliseconds between =
the injector=20
pulse & </FONT></DIV>
<DIV><FONT face=3DArial size=3D2>the ignition pulse. I realize it's =
going to be hard=20
to</FONT><FONT face=3DArial size=3D2>keep a steady enough rpm to get a =
close=20
</FONT></DIV>
<DIV><FONT face=3DArial size=3D2>degree setting based on the =
milliseconds=20
between</FONT><FONT face=3DArial size=3D2> the injector/ignition=20
pulses.</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT> </DIV>
<DIV><FONT face=3DArial size=3D2>Also I've wondered if it would =
</FONT><FONT=20
face=3DArial size=3D2>be a lot easier to use a 3 channel scope & set =
the #1=20
injector </FONT></DIV>
<DIV><FONT face=3DArial size=3D2>pulse about halfway between</FONT><FONT =
face=3DArial=20
size=3D2> the two corresponding ignition pulses ? Any thoughts/ideas any =
</FONT></DIV>
<DIV><FONT face=3DArial size=3D2>of you have on this would =
be</FONT><FONT face=3DArial=20
size=3D2> greatly appreciated. </FONT></DIV>
<DIV> </DIV>
<DIV><FONT face=3DArial size=3D2>One more thing----has anyone had any =
experience=20
with Russ Collins injectors ? All of his </FONT></DIV>
<DIV><FONT face=3DArial size=3D2>products/services seem very nice but =
very=20
expensive.</FONT></DIV>
<DIV> </DIV>
<DIV><FONT face=3DArial size=3D2>Ray Roberts</FONT></DIV></BODY></HTML>
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