stony Posted September 14, 2002 Share Posted September 14, 2002 has anyone ever dynoed using sds? for some reason im losing my rpm signal (to the dyno) on each run. we originally thought it was rf interference but with that illiminated and car running fine on we are at a loss. the timing just breaks up all thru the run and only registers randomly on the screen. The dynojet uses 2 leads 4 inches apart on a spark plug wire. we tried different wires, changed leads and also hooked into the green and black wires ( tach and ground) all of these gave us a good idle rpm indication but as soon as we get on it the siganl breaks up. without the timing siganl i have no torque or rpm indication. I would really like to have these available. any suggestions? i have allready emailed sds no reply yet Quote Link to comment Share on other sites More sharing options...
SHANE Posted September 15, 2002 Share Posted September 15, 2002 wow i just dynoed for the first time ever friday. i have an SDS and about half way through the dyno session we lost the tach signal also. we were getting the signal from a plug wire too. they put a piece of reflective tape on the crank pulley and use some kind of a light that reads the tape. this is supposed to be more accurate. but it still did not work. we just thought there was something wrong with the dyno so most of my runs show MPH instead of RPM. Quote Link to comment Share on other sites More sharing options...
stony Posted September 15, 2002 Author Share Posted September 15, 2002 hmmm anyone else on the dyno have problems with sds? Quote Link to comment Share on other sites More sharing options...
Ron240zxt Posted September 15, 2002 Share Posted September 15, 2002 Negative, No problems, I actually used a mustang dyno, with a clamp on number one cyl plug wire (simular to timing gun light) it worked fine. No problems even thought I went up to 5500rpm level Later Ron Quote Link to comment Share on other sites More sharing options...
240Z Turbo Posted September 15, 2002 Share Posted September 15, 2002 Same problem as with the tech. You can try getting a signal from the #1 injector clip. Or you can try getting a signal from the power wire. Quote Link to comment Share on other sites More sharing options...
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