ignition system for my 520 stroker

[jordan]

I am currently having my 440 based 520 stroker built this week and finished within the next 2 weeks.  I need a complete ignition system.  I want a stock appearing system, and no big business or foreign stuff.  Sorry MSD, I have had problems in the past.  I am leaning toward the Rev-n-nator ignition for its near stock appearance, digital control, and a rev-limiter.  I am ready to buy a distributer from Custom wire sets and performance products, as seen in Mopar Collector guide Dec. 11.  I think I will go with the adjustable mechanical advance billet distributor and a set of fire core wires.  I just need a hot coil, suggestions anyone?  My biggest questions are do I need a multiple spark discharge for low rpm and big displacement?   I was given advice about the Daytona Sensors CD1 ignition box for its tune ability, but it may be more than I really need.  I have been given multiple opinions that vary from stock with a hot coil, to full computer controlled stuff that is potentially complicated.  Does my goal of stock appearance using the rev-n-nator, and the stock height distributer match well enough to actually perform with a high performance stroker big block.  Any suggestions for me since I have to get something yet this week?  Thanks for your replies.     

[Chryco Psycho]

I have not used a reva nator system
 multiple spark system like MSd generally cannot generate spark fast enough to do do more then one spark above 3000 rpm & below that you are barely into the powerband anyway , not sure what the best high output coil is , there are a lot of the newer coils that use no oil , just solid state windings etc .

[jordan]

Hi Chryco, it sounds as if you don't think I need a msd.  I have heard  many opinions about this, but I am leaning towards single big spark type of ignition like stock.  Do I need to be worried about the engine loading up at cruising speed/low rpm with out msd?  Isn't this more of a fuel jetting issue? I don't have any experience with a stroker big block, so I am worried about potential problems that could be no problem if I have the right equipment. I appreciate your help.  Jordan

[Chryco Psycho]

the stroker is no harder to tune but once it is tuned a decent ign will run it fine with no problems like loading up etc , multi spark is no better really , if it fires the fuel on the first spark with a good ign a second spark will not help . Jetting timing mixture etc is all important in tuning .

[dodj]

if it fires the fuel on the first spark with a good ign a second spark will not help

But if it doesn't fire on the first spark, the second, and/or third spark, makes a world of difference. 

[Chryco Psycho]

true up to 3000 rpm when the multi spark quits , where you make the real power you still have 1 spark to get it lit

[jordan]

does a stock type ignition system have the potential for having problems in the lower rpm range while just cruising?  I have a six pack ready to go on the motor, with jet plates in place of the metering plate.  If I set up the center carb, with a proper jet size, the motor should run fine, i.e., not loading up because it is too rich.  My next question is how will the ignition timing change when the outboard carbs open up?  I understand I will have to advance the curve, but that should all coincide with the jetting, right?  I plan on jetting the carbs before I start working the timing in.  So if I don't jet the center too rich, will the motor load up at lower rpm under normal driving without the multiple spark?  I am feeling paranoid about low rpm loading up because I had a guy warn me about this, so I am trying to avoid issues before it occurs.  Was this just a scare tactic to get me to buy a more expensive product?   Thanks guys.    J

[Chryco Psycho]

the six pack will work fine just jet it at 64 or so , adjust the outboard mixture screw & there is no reason to load up

[jordan]

Chryco, thanks for the feedback.  I don't know enough about building cars and engines to be certain about tuning, so I start wondering about things I don't know about.  Thanks for reinforcing the ideas I do have going.  My plan is to tune the engine on the dyno for drivability more so than for that last digit of h.p. on a piece of paper.  Once I get the motor finished, I will post my results in the engine thread.  Jordan

[thertgarage]

The Rev-n-nator would work perfect in your application. Would recommend the blaster 2 coil.