Perf increases w/MSD style systems
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Race Director
Joined: Sep 2002
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From: San Diego - Deep Within The State of CONFUSION!
Perf increases w/MSD style systems
What are they? My stroker has been dyno tuned with the factory HEI ignition system (accel coil though) and I've been tossing around the idea of installing the MSD Pro Billet design, or Crane's version.
My stroker is healthy but fairly mild ... what kind of bennies am I gonna get and is it worth the effort over the standard HEI?
My stroker is healthy but fairly mild ... what kind of bennies am I gonna get and is it worth the effort over the standard HEI?
Burning Brakes
Joined: Sep 2004
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From: Vernon British Columbia
St. Jude Donor '05
First C3 General Poster!
5-15hp probably...that would require a fairly beef ignition setup. The hardcore MSN Pro Billet, Digital 6, HVC II coil, Wire, Plug type setups are usually for high compression, high output motors. They need the double spark and high voltage to ensure full burn. Smaller motors will benefit just the same from increased combustion efficiency and thus youll get better power, reving, and mileage.
Thread Starter
Race Director
Joined: Sep 2002
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From: San Diego - Deep Within The State of CONFUSION!
Originally Posted by 81 Vette
5-15hp probably...that would require a fairly beef ignition setup. The hardcore MSN Pro Billet, Digital 6, HVC II coil, Wire, Plug type setups are usually for high compression, high output motors. They need the double spark and high voltage to ensure full burn. Smaller motors will benefit just the same from increased combustion efficiency and thus youll get better power, reving, and mileage.
Burning Brakes
Joined: Sep 2004
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From: Vernon British Columbia
St. Jude Donor '05
First C3 General Poster!
Originally Posted by SanDiegoPaul
Thanks. What I'm running is a 10:1 383, but with cast iron heads. Pocket porting and Stainless 1.94 valves /// cam is Comp Cams 270 duration with .492 lift but with 1.6 roller rockers. 795CFM Edlebrock Qjet on a Performer manifold that has been port matched to the heads. The heads are my setup's bottleneck. I have true duals with magnaflow mufflers and Hedman hedders.
Race Director
Joined: Apr 2000
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From: Who says "Nothing is impossible" ? I've been doing nothing for years.
I'll have to agree there, for the money you will get more bang for the buck in doing other mods such as porting the heads. The MSD ignition is a good ignition and will spark reliably higher than stock HEI but for mild buildup that sees 5500RPM you get will 0, nada nothing zippo.....ask me how I know 
Some say you will get a better idle, gas milage etc. but that stuff does nothing for me
Some say you will get a better idle, gas milage etc. but that stuff does nothing for me
Race Director
Joined: Nov 2002
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From: Taylor Michigan
Originally Posted by SanDiegoPaul
What are they? My stroker has been dyno tuned with the factory HEI ignition system (accel coil though) and I've been tossing around the idea of installing the MSD Pro Billet design, or Crane's version.
My stroker is healthy but fairly mild ... what kind of bennies am I gonna get and is it worth the effort over the standard HEI?
My stroker is healthy but fairly mild ... what kind of bennies am I gonna get and is it worth the effort over the standard HEI?
Le Mans Master
Joined: Mar 2004
Posts: 7,502
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From: Little Rock AR
I doubt you would see any HP benefit over the HEI unless you turn more RPM. The HEI as delivered is supposed to begin to drop sparks at around 4800 RPM if I remeber right. Not much of a deal for mild motors but might need a little upgrade if you want to spin it.
-Mark.
-Mark.
