I'm thinking about using this ignition box in my 73 duster and also installing a EZ wiring universal wiring harness with a stock mopar electronic distributor. This will allow me to ditch the resistor correct? Any special coil I will need?
Summit ignition box
- Thread starter Dusted73
- Start date
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Don't know. You're going to have to find and read the instructions on that unit to be sure.
Scody21
Just send it
Most likely it is wired just like the MSD 6AL which does not use a resistor and just uses a normal 12V coil.
Most likely, but I would sure verify.
Scody21
Just send it
Agreeed. It is the summit knock-off of the MSD 6AL and will accept the MSD rev limit “pills”
j par
Well-hung Member
Summit doesn't make much stuff they just have other manufacturers make it and put their name on it and buy large quantities or promise to sell large quantities and don't even have to store them...
For example they have their own intellitronix stuff that they sell a little cheaper but only give a 1-year warranty instead of a lifetime warranty...
It's quite simple a coil that needs a ballast resistor will say it on it... You can just run your regular ignition and get a non-resistor coil and run without a resistor...
Also remember you're not going to gain any horsepower or anything like that I'm moving away from the factory stuff.... Maybe a rev limiter or something like that...
For example they have their own intellitronix stuff that they sell a little cheaper but only give a 1-year warranty instead of a lifetime warranty...
It's quite simple a coil that needs a ballast resistor will say it on it... You can just run your regular ignition and get a non-resistor coil and run without a resistor...
Also remember you're not going to gain any horsepower or anything like that I'm moving away from the factory stuff.... Maybe a rev limiter or something like that...
Rat Bastid
Dunamis Metron
That’s not quiet true. A good ignition system can and will make more power. You have to test for it. That means on an engine dyno where you can back to back test each one. That’s the only way to know for sure.
A old friend used one of those and it was excellent. It was in his mud truck that was abused on a regular. An upgraded coil was used but IIRC, (since I installed it) it didn’t require an aftermarket coil, but I honestly suggest it. There cheap enough! The mounting of the box was in a poor spot getting drenched and caked with water and mud. It did give out after a long while. In a car, I don’t see a problem with it lasting a very long while. YRMV.
pishta
I know I'm right....
consider an E-coil like a PS-93 for that box. No oil, mount it wherever you want.
j par
Well-hung Member
I'm sure maybe in some microscopic way on some expensive dyno he may find some kind of improvement but when I went for my factory stuff to complete full MSD everything I seen absolutely nothing on my time slip to show me that it was worth the money I paid for it.. I like the rev limiter...
Rat Bastid
Dunamis Metron
Define microscopic. If 15 HP at peak and 12 average is microscopic then it is what it is. And that was without much time to do real testing. It was an A-B-A-B test.
That's enough to win or lose races.
Also, I still recommend finding the instructions for that and verify whether it is supposed to have a resistor. Otherwise, he's really flying blind. I'm pretty confident it doesn't require one, but without being 100% sure, I'm not going to recommend one way or the other.
[1] MSD 6A does not require resistor removal or bypassing it. Not sure about Summit box.
[2] Unlikely to notice any benefit from this 'box' if the engine is stock or near stock.
[3] A proper CD E core ign coil should be used if the max benefit is to be gained from the ign system.
[2] Unlikely to notice any benefit from this 'box' if the engine is stock or near stock.
[3] A proper CD E core ign coil should be used if the max benefit is to be gained from the ign system.
The wiring to Chrysler ignition instructions show that it wires in like an MSD 6A. Original positive wire from coil switches box on and off and coil wires directly from ignition box.
https://static.summitracing.com/global/images/instructions/sum-850610.pdf
https://static.summitracing.com/global/images/instructions/sum-850610.pdf
And there you have it.
j par
Well-hung Member
Had to look and make sure I wasn't on the race forum.... Win a race? ... I thought the OP just wanted to ditch a resistor not win a race?...
After the near non-existent or flat out non-existent change in my ET on my 73 duster I say no more than the advantage of having a rev limiter... And I can tell you with a cam with Will over 267° of duration and over 600 lift I wasn't getting any good idle quality under three grand either way or... LOL... Now when I built the street stroker for my power wagon I just got a cheap speedmaster in electronic ignition distributor and a cheap speedmaster coil and it runs flawlessly. I don't need a choke and there's no problems anywhere... All of which didn't cost me a hundred bucks on Black Friday....
From what I can gather from the race forum 99% of the people race bracket anyways so that's just consistency...
I can see I'm missing plenty of posts here from people I probably have blocked but all I can do is just give my personal experience...
The op wants to ditch his resistor... Will the summit box help him do that?... Is it necessary?... Or are we drag racing heads up against a equally equipped opponent with equal cars equal experience and the other car has a factory ignition with the resistor?...
I have found there is little to zero benefit in feel of the pants improvement on a MSD or like system on the street/strip car. I make this statement against a Chrysler Chrome box ignition.
What the multi spark did do over the Chrysler box was just what MSD claimed it would do. And only these three things as observed from the drivers seat.
Easier start up. A most minor improvement.
More mileage. It was about 2 mpg on a stock 360.
More power was there on the low end with the multi spark boxes. It’s noticeable. Not a huge gain. Worthy though.
Once your last that 3K rpm area, you couldn’t find a difference worth shouting about. Was it there? I couldn’t tell. My butt dyno is t that super sensitive.
It’s been an easy decade and a half since I installed that Summit box. It was an easy install, nothing trick, weird or complicated.
What the multi spark did do over the Chrysler box was just what MSD claimed it would do. And only these three things as observed from the drivers seat.
Easier start up. A most minor improvement.
More mileage. It was about 2 mpg on a stock 360.
More power was there on the low end with the multi spark boxes. It’s noticeable. Not a huge gain. Worthy though.
Once your last that 3K rpm area, you couldn’t find a difference worth shouting about. Was it there? I couldn’t tell. My butt dyno is t that super sensitive.
It’s been an easy decade and a half since I installed that Summit box. It was an easy install, nothing trick, weird or complicated.
I've been using DC electronic distributor, chrome box with Accel super coil for years.
The only upgrade I've done is add the FBO limiter plate a few years ago.
With good wires and plugs, fire in the hole at the proper time. lol
The only upgrade I've done is add the FBO limiter plate a few years ago.
With good wires and plugs, fire in the hole at the proper time. lol
That right there has always been a rock solid ignition system for me.
Me too! But when you start preachin it, there's always somebody runnin it down.
I was speaking in general terms. Not necessarily about the OP's car. A well sorted ignition OF ANY TYPE can make the difference between won and lost races. And as I've said multiple times now, I don't know 100% whether that unit takes a resistor or not. That's why I recommended him downloading the instructions to be SURE. I've used MSD before. I've not used the Summit box before. Have you used this exact Summit box?
True
j par
Well-hung Member
I'd be shocked to find out that the summit box is not a relabeled MSD box...
As would I, but I don't know and I'm not giving advice based on "I DON'T KNOW".
j par
Well-hung Member
I'm giving advice on what I do now and that is I went from a factory ignition with ballast resistor and everything to full MSD and did not pick up or drop anytime on my time slip... Others results may differ but this is my experience...
Real world at the racetrack...
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