Capacitive Discharge Ignition, Any benifits to using the MSD system? |
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Capacitive Discharge Ignition, Any benifits to using the MSD system? |
Driver174 |
Jul 30 2018, 08:33 PM
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#1
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Member Group: Members Posts: 106 Joined: 2-February 17 From: Nevada Member No.: 20,806 Region Association: None |
914-4 2L race engine, 10.3:1 compression ratio and twin Weber's
Anyone have experience with the MSD systems on a Type IV? I'm thinking there may be benifits to having the higher spark voltages when compression ratio is relatively high. MSD claims plug gaps of .050 - .060" are possible, and that multiple sparks at lower RPM's improve throttle response. Thus, makes sense, but does anyone have real world experience that support these claims? |
McMark |
Jul 31 2018, 11:07 AM
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#2
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914 Freak! Group: Retired Admin Posts: 20,179 Joined: 13-March 03 From: Grand Rapids, MI Member No.: 419 Region Association: None |
CDI and MSD are two different things:
CDI: Capacitive Discharge Ignition which is essentially an increase in spark voltage. MSD: Multiple Spark Discharge which fires the spark plugs multiple times instead of once. CDI setups will jump larger gaps, will more reliably fire at high compression ratios and at high RPM. MSD setups only function at lower RPM and multiple sparks mean multiple opportunities to ignite the mixture, so this really is best for engines that experience erratic idle and low rpm misfires. |
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