Re: Ignition system recommendations for stroker BB - MSD?
[Re: 70Sbird]
#1085155
09/29/11 12:50 PM
09/29/11 12:50 PM
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Joined: Mar 2007
Posts: 3,287 West Coast, USA
jbc426
master
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master
Joined: Mar 2007
Posts: 3,287
West Coast, USA
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The Firecore guys have a nice system. They don't have the internal distributor corrosion issue the MSD probillet unit has either form what I hear. The big thing with any of the distributors that you may use is that you are able to limit the mechanical advance enough to run more initial advance with out getting too much total advance. Vacuum advance would like be a good feature if your on the street a lot.
1970 Plymouth 'Cuda #'s 440-6(block in storage)currently 493" 6 pack, Shaker, 5 speed Passon, 4.10's 1968 Plymouth Barracuda Convertible 408 Magnum EFI with 4 speed automatic overdrive, 3800 stall lock-up converter and 4.30's (closest thing to an automatic 5 speed going)
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Re: Ignition system recommendations for stroker BB - MSD?
[Re: 70Sbird]
#1085156
09/29/11 01:18 PM
09/29/11 01:18 PM
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Joined: Aug 2003
Posts: 43,308 Bend,OR USA
Cab_Burge
I Win
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I Win
Joined: Aug 2003
Posts: 43,308
Bend,OR USA
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The mopar kits work well, which box are you running now? wdo you know hat is going bad in yuor current distributor?Not much in there, pickup, reluctro, mechanical and vacume advance ![](/ubbthreads/images/graemlins/shruggy.gif) The Orange box has a built in RPM limiter, the Chrome boxes do not ![](/ubbthreads/images/graemlins/1343795-scratchchin.gif)
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
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Re: Ignition system recommendations for stroker BB - MSD?
[Re: Viol8r]
#1085160
09/29/11 02:24 PM
09/29/11 02:24 PM
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Joined: Jan 2003
Posts: 16,376
dogdays
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 16,376
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There is no magic ignition system. There is no power gain to be found from one properly-operating system to another. Years ago, Circle Track magazine tested ignition wires and found no power gain over a set of new carbon-impregnated-rope street wires, and they tried several major styles and brands. IIRC one super-trick set cost horsepower, but generally they were all clustered within measurement error. Not even straight copper conductors were any better. However, durability of spiral core wires is generally superior to the others. For wires I have used cheap Borg-Warner and MSW spiral cores with success, also MSD. But for quality of construction and general feel, you cannot beat Magnecor 8.5mm wires. They cost more, but it is rewarding just to install them. I have never used a better-feeling wire.
I am using the Direct Connection high perf breakerless distributor with a $40 'bay MSD 6 and a Jacobs chrome coil on my '64Dog. I really like the quick ignition curve in the distributor. The MSD box I substituted for a softly failing 20+ year old orange box. The coil I had bought to use with the orange box.
On every other regular driver I am using an Accel 300+ ignition box and coil. I have bought these used for as little as $42 and two brand new ones for less than $120 each, all on the 'bay. The Accel unit on my 93 suburban has been working in the engine compartment for more than 130,000 miles, without failure. This engine compartment is so hot that after driving you cannot lay your arm on the hood. The Accel is digital. It is small and has a built in rev limiter that you set with a screwdriver. The only problem I have had is that it makes rather loud clicks from the internal capacitor. I'd suggest either mounting it on the fenderwell or else using rubber mounts if it's on the firewall. I put rubber washers behind mine and quieted it down a lot.
You can use a Crane, MSD or Accel with success. Be sure to use the recommended coil. The boxes' specs are quite close to each other, and are beyond what your engine needs. Check out the specs of the older NASCAR-approved boxes, they were actually a little less powerful than the street versions. To my way of thinking, energy available per spark event is the major factor.
Several years ago, Car Craft ran a test of the different spark systems available at that time. Horsepower figures for each box were within the measurement error of the others. Fact is, a good point system would make your sparks just fine. I do prefer the simplicity and durability of the breakerless system, though.
The last point is, a better distributor advance curve will really make an improvement in how the car feels. So for this reason I encourage you to get a new breakerless distributor with easily adjustable ignition curve. This will make more difference than what kind of box or coil you are using.
R.
Last edited by dogdays; 09/29/11 02:30 PM.
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Re: Ignition system recommendations for stroker BB - MSD?
[Re: dogdays]
#1085161
09/29/11 04:03 PM
09/29/11 04:03 PM
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Joined: Jan 2003
Posts: 21,085 Niles , Ohio
therocks
oh wait.but hey.lets see.oh yeah.
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oh wait.but hey.lets see.oh yeah.
Joined: Jan 2003
Posts: 21,085
Niles , Ohio
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MSD all the way.I put mine in probally 10 years ago.My sons about 7 years.He had the MP all set up.He dropped .2 in the 1/4 with MSD.He runs the digital 6 I run the 6AL.No problems easy to set the curve.Just look at the track.Probally 90 % of the racers run MSD.Rocky
Chrysler Firepower
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Re: Ignition system recommendations for stroker BB - MSD?
[Re: 70Sbird]
#1085162
09/29/11 05:57 PM
09/29/11 05:57 PM
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Joined: Nov 2003
Posts: 36,041 Lincoln Nebraska
RapidRobert
Circle Track
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Circle Track
Joined: Nov 2003
Posts: 36,041
Lincoln Nebraska
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Quote:
For whatever reason the timing drops off to 0 or even + a couple degerees ATDC below about 1,000 rpm. we adjusted the vacuum advance all the way "in" but there is still a bunch of instability below around 1,100 RPM.
what are you running for springs and what initial. As said there's not much in there & unlike the old point dizzys that wore the bushings from the point tension, electronic ones last a long time. More info, might not need a new one. I say it's fixable EDIT what is your idle speed?
Last edited by RapidRobert; 09/29/11 06:04 PM.
live every 24 hour block of time like it's your last day on earth
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Re: Ignition system recommendations for stroker BB - MSD?
[Re: THESHAKERPROJECT]
#1085164
09/29/11 06:44 PM
09/29/11 06:44 PM
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Joined: Mar 2007
Posts: 3,287 West Coast, USA
jbc426
master
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master
Joined: Mar 2007
Posts: 3,287
West Coast, USA
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For my convertible. I bought a rebuilt Factory Mopar distributor from Napa for like $70, welded up the mechanical advance slots a bit, dialed it in with my dial back timing light, and am running a universal Accel 300+ box & coil. The motor loves the higher ignition energy over the stock point type ignition, especially at start-up and at idle, plus it has a built in rev limiter.
I keep a ready to go points distributor and coil in a small box in the trunk along with the tools to swap it out just in case of failure.
1970 Plymouth 'Cuda #'s 440-6(block in storage)currently 493" 6 pack, Shaker, 5 speed Passon, 4.10's 1968 Plymouth Barracuda Convertible 408 Magnum EFI with 4 speed automatic overdrive, 3800 stall lock-up converter and 4.30's (closest thing to an automatic 5 speed going)
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