James92TSi

10-10-2002, 02:27 AM

Yes, I http://www.dsmtalk.com/forums/images/top_search.gifed to my heart's content. 7 pages worth, no real definitive answers.

I'm looking to make a comparison between the MSD DIS-2-HO, and the Crane HI-6DI2 ignition boxes. Here are some relevant specs from the manufacturer's sites (I deleted useless things like dimensions and operating voltage):

MSD:

- Spark Energy: 170 milliJoules Per Spark

- Primary Voltage: 470 Volts

- Output Voltage: 43,000 Volts (Stock Coil)

- Current Draw: DIS-2 HO, 5.3 amps@10,000 rpm

- RPM Range: 12,500 rpm w/14.4 Volt Supply

Crane:

- Current draw: 3.0 amps max at 10,000 RPM

- RPM operating range: 20,000+ RPM (with rev limiter disabled)

- RPM limiter range: 500 to 9,900 RPM in 100 RPM increments for each stage

- RPM limiter accuracy: ±30 RPM

- Multiple Spark Duration: Approximately 20° crankshaft rotation below 3,600 RPM. Maximum 12 sparks per seq. with 1 millisecond interval between sparks.

- Primary voltage output: 450 volts

- Primary energy output: 1200 millijoules/sequence

- Trigger inputs: Module trigger (12 volt square wave)

Now this is where it gets interesting. My observations from comapring these specs:

- Energy output: Crane is 1200 mJ/sequence, MSD is 170 mJ/spark. I need to find out how many sparks are in a "sequence" to be able to compare these specs. Dammit.

- The MSD draws more current at 10k RPM (5.3 amps vs. <2.0 amps). Makes me wonder if the MSD is putting out more spark than the Crane, or if there's just more waste in the MSD circuitry.

- Primary output voltage: MSD 470 volts, Crane 450.

- Although not listed in the MSD's short rundown of specs, the Capacitive Discharge is also for 20° of crank rotation. MSD does not specify an RPM at which it goes to single spark... Crane uses CD under 3600 RPM, and single spark over 3600.

- Crane rev limit and stage limit is adjustable in 100 RPM increments to 9,900. MSD is adjustable in 250 RPM increments to as high as the unit will fire (12.5k). Advantage to Crane for the smaller increment, I'm not revving higher than 9900.

Any other ideas anyone has about these two boxes are welcome, as well as hands on experiences with them. Thanks for any input..

I'm looking to make a comparison between the MSD DIS-2-HO, and the Crane HI-6DI2 ignition boxes. Here are some relevant specs from the manufacturer's sites (I deleted useless things like dimensions and operating voltage):

MSD:

- Spark Energy: 170 milliJoules Per Spark

- Primary Voltage: 470 Volts

- Output Voltage: 43,000 Volts (Stock Coil)

- Current Draw: DIS-2 HO, 5.3 amps@10,000 rpm

- RPM Range: 12,500 rpm w/14.4 Volt Supply

Crane:

- Current draw: 3.0 amps max at 10,000 RPM

- RPM operating range: 20,000+ RPM (with rev limiter disabled)

- RPM limiter range: 500 to 9,900 RPM in 100 RPM increments for each stage

- RPM limiter accuracy: ±30 RPM

- Multiple Spark Duration: Approximately 20° crankshaft rotation below 3,600 RPM. Maximum 12 sparks per seq. with 1 millisecond interval between sparks.

- Primary voltage output: 450 volts

- Primary energy output: 1200 millijoules/sequence

- Trigger inputs: Module trigger (12 volt square wave)

Now this is where it gets interesting. My observations from comapring these specs:

- Energy output: Crane is 1200 mJ/sequence, MSD is 170 mJ/spark. I need to find out how many sparks are in a "sequence" to be able to compare these specs. Dammit.

- The MSD draws more current at 10k RPM (5.3 amps vs. <2.0 amps). Makes me wonder if the MSD is putting out more spark than the Crane, or if there's just more waste in the MSD circuitry.

- Primary output voltage: MSD 470 volts, Crane 450.

- Although not listed in the MSD's short rundown of specs, the Capacitive Discharge is also for 20° of crank rotation. MSD does not specify an RPM at which it goes to single spark... Crane uses CD under 3600 RPM, and single spark over 3600.

- Crane rev limit and stage limit is adjustable in 100 RPM increments to 9,900. MSD is adjustable in 250 RPM increments to as high as the unit will fire (12.5k). Advantage to Crane for the smaller increment, I'm not revving higher than 9900.

Any other ideas anyone has about these two boxes are welcome, as well as hands on experiences with them. Thanks for any input..