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Author Topic:   MSD style ignitions dyno results?

Posts: 123
From: Toronto, Ontario, Canada
Registered: Feb 2003

posted 02-13-2003 04:42 AM     Click Here to See the Profile for jeffstar   Click Here to Email jeffstar     Edit/Delete Message   Reply w/Quote
I have a warmed over 351W, Windsor senior heads, proflow valves, x303 roller cam, tourqerII, holley 650, headman shorty headers
and stock rebuilt ford electronic distrubuter from a seventy something ford. Gtech says its making 330HP@rear wheels.

Has anyone done before after dyno tests on warmed over motor to see how much power you actually get with a MSD style box vs stock electronic? Thanks in advance for your help

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Posts: 1333
From: Charlotte NC usa
Registered: Apr 2001

posted 02-13-2003 08:03 AM     Click Here to See the Profile for Mpcoluv   Click Here to Email Mpcoluv     Edit/Delete Message   Reply w/Quote
My experience is that the MSDs boxes (6As) help keep the idle clean and maybe give a little better off idle performance.
I have never noticed any additional top end power.
In fact many roundy round guys around here have dumped the MSD type of boxes and run a
modified stock distributor with a pertronix and a hot coil.
Check out for the setup.

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Posts: 1724
From: Athens,GA
Registered: Jul 2001

posted 02-13-2003 10:45 AM     Click Here to See the Profile for bluestreek   Click Here to Email bluestreek     Edit/Delete Message   Reply w/Quote
Tests have shown about a 1-2% improvement in power and economy over weak stock ignitions. I'm not so sure if it's because of the Box or the hotter coils being used. I think the major advantage of multi-spark-discharge in racing is when you run large amounts of air & fuel at varying temperatures and need to keep the burn clean and dependable. The coil design and ignition accuracy is what makes the most difference at high rpms. I guess you could think of it as spark insurance.

I'll get a chance to make a 6000 rpm comparison on the strip sometime this spring. I'm gonna start out with the stock distributor with Pertronix and work my way up to MSD digital to see if it's worth anything in the 1/4 mi.

1966 Mustang Coupe: Custom glass hood and BIG scoop sits atop a 289 stroked to 331 c.i., Steel crank and girdle, 5.4 H-beams, Forged slugs, ported TFS alum. heads, ported Stealth 8020 intake, CompCams Xtreme Solid Roller, Holley 750 HP, long tubes, 4speed, 9" 3.50 posi, BFG Drag radials..

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