Todays date is 6/1/2026
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.
- RPM kohms
- 3000 = 1.897
- 5600 = 4.22
- 5800 = 4.44
- 6000 = 4.64
- 6200 = 4.85
- 6400 = 5.08
As Posted by Tim Corcoran on PY Online Forums
Created on ... July 27, 2004
