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Author Topic:   DUI vs. MSD Ignition
last-heat first-feature
posted December 26, 2001 08:03 PM
I'm thinking about buying a DUI Ignition System. I have ran an MSD with no troubles. What are everyone's thoughts?

posted December 26, 2001 09:29 PM
I have ran the DUI for about 5 years and never have had a problem, not even a module. I bought a spare distributor and it just collects dust. I think there will be about a 50-50 split on which one everybody prefers.

dirt mod 70
posted December 29, 2001 06:39 PM
i always run msd.....never had a problem!!!
why change ???

posted December 29, 2001 09:14 PM
I ran a DUI worked good for me. I will say with the DUI its a little hard to start.

posted January 01, 2002 08:05 AM
bought my DUI back in 1995. Never a problem with it. seen lots of msd guys miss races or engine starts popping with them breaking down. never missed a beat with the same DUI distributor running it 7 years now. Only maintenance was to change rotor and distributor cap once in 7 years. Have won lots of races with it. Can't get any better in performance or easy on the budget than that.

posted January 01, 2002 01:37 PM
Gary, Good to see your back. I like the MSD performance and theory but the new Jacobs electronics box has got me thinking.

posted January 01, 2002 07:37 PM
Stick with the MSD.If you have a problem the parts truck should have the parts or another racer.The DUI works well but its not the common ignition you will find at the track.Im sure most of you have had to find parts for that one odd part you bought, at the track with no luck and end up watching rather then racing.

posted January 01, 2002 08:29 PM
I run a stock HEI and I keep about 3 spare cap's and coil's wit me at all times. The HEI is real good if you have all racing part's in it though.

posted January 10, 2002 10:15 PM
I run HEI's that I build myself. I use the DUI coil (53000 volts), MSD module (the one with the circuit board), and lock out all of the advance. It starts fine, even with a bunch of timing. I have had no troubles other that burning the wires off the dist. when I left a fuel fitting loose and tried to have scorched greggie for a racenight snack.

posted January 16, 2002 01:32 PM
I agree with mod67. Almost every race you see one of the nascar drivers switching out ignition boxes. Of course, I had to experience ignition failure the hard way before I learned. I ran a MSD set-up this year and it worked great until it was time to fire up the engine for the biggest feature of the year - no spark. Watched the biggest race of the year from the pits.

posted January 16, 2002 10:31 PM
I too run the DUI. NEVER any problem. I enjoy the simplicity (NO BOXES) and the low maintenance costs. Here we run April thru early October which means air tempertures from 38 to 95 degrees. The DUI performs the same, all the time. Just my opinion.

posted January 20, 2002 07:41 PM
$1500 ? units start at $2500 and primo unit is $5000. Any other ones out there? and how much?

devil wrench
posted January 22, 2002 11:10 AM
I think you're going to see the price start to drop on those units as you can now do the same thing with the digital ignitions yourself with a computer.

posted February 02, 2002 02:12 PM
I ran HEI for a long time. When I switch to MSD the car just seemed to start better. I'm on alcohol when the weather warms up, and had trouble several times starting with the HEI (P.D.). Even on the coldest of nights the MSD seems to start better. But the HEI is in the trailer as a backup. I also try to always line up early in case there is a problem!

posted February 02, 2002 04:46 PM
one thing to think of is that the rated output of the msd box is based on a 14volt imput. so unless you plan on running an alt. you will not get full output, max battery output at best is 12.7 volts. personally ive run both, but tend to like the hei better, less wires to worry about!!! never had a problem with hei


posted February 03, 2002 09:52 AM
My MSD book says it will run at full power at 11 volts.An HEI will not turn 5000 at 10 volts.I have used both with success I think the MSD makes a difference under caution and in starting.So far haven't had a box fail.

[This message has been edited by race8k (edited February 04, 2002).]