- Oct 21, 2006
- 409
- 15
- 29
My car died last week and I tested a bunch of things along with my TFI Coil.
I thought my MSD TFI Blaster Coil was bad.
Read this before discarding your after market coil !!!!!
The Haynes Manual says to replace it if doesn't meet the following.
My Haynes Manual states the following for Ignition Coil Resistance.
Primary resistance................... 0.3 to 1.0 ohms
Secondary resistance..............8.0 to 11.5k ohms
MSD TFI Blaster Coil Resistance (from their web site)
Primary Resistance: 0.44 ohms
Secondary Resistance: 3.1K ohms
Maximum Voltage:
48,000 volts
Inductance: 7 mH
Turns Ratio: 85:1
Peak Current: 300 mA
Spark Duration: 250 Us
The MSD Coil doesn't meet the secondary resistance, but now I see that the lower resistance must be part of how it delivers higher voltage
I thought my MSD TFI Blaster Coil was bad.
Read this before discarding your after market coil !!!!!
The Haynes Manual says to replace it if doesn't meet the following.
My Haynes Manual states the following for Ignition Coil Resistance.
Primary resistance................... 0.3 to 1.0 ohms
Secondary resistance..............8.0 to 11.5k ohms
MSD TFI Blaster Coil Resistance (from their web site)
Primary Resistance: 0.44 ohms
Secondary Resistance: 3.1K ohms
Maximum Voltage:
48,000 volts
Inductance: 7 mH
Turns Ratio: 85:1
Peak Current: 300 mA
Spark Duration: 250 Us
The MSD Coil doesn't meet the secondary resistance, but now I see that the lower resistance must be part of how it delivers higher voltage