Todays date is 4/25/2024





MSD RPM Chips



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Here's a list of resistance values for anyone interested in making their own MSD chips. 1/4 watt resisters work just fine.



RPM Kilo-OHMS
1400  =    .491
1500  =    .639
1600  =    .819
1800  =    .947
2000  =    1.161
2200  =    1.364
2400  =    1.50
2500  =    1.58
2600  =    1.70
2800  =    1.78
3000  =    1.906
3200  =    2.062
3400  =    2.222
3600  =    2.385
RPM Kilo-OHMS
        
3800  =    2.551
5000  =    3.63
5200  =    3.82
5400  =    4.02
5600  =    4.20
5800  =    4.41
6000  =    4.62
6200  =    4.82
6400  =    5.04
6600  =    5.26
6800  =    5.46
7000  =    5.72
8000  =    6.96


To make an adjustable RPM switch get a 6 position rotory switch with detents from an electronics store. Then solder in the resistors for the desired RPM levels. Use it in conjuction with a two step to control launch RPM. It works great. I found that when you launch the car 1,000 RPM below converter stall the car hits real hard as you take advatage of the flashing.

Below is the resistance ratings for Autometer chips for their shift lights.




As Posted by Tim Corcoran on PY Online Forums

Created on ... July 27, 2004