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Ignition suggestions for a 340 street engine. Distributor, coil, etc.

Started by soccernut43, August 15, 2020, 07:39:01 AM

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FIAARMN

1970 AAR Cuda Limelight Green,White Interior, - Hamtramck Built 36k miles, Verified All Numbers Match - Broadcast Sheet, Warranty Card & Window Sticker!

b5cuda

FBO is great.  If you're not concerned with staying 100% pure, you can also look at the GM HEI module.  Bypasses ballast resistor, cheap and reliable.

Scooter

Quote from: b5cuda on August 16, 2020, 02:42:27 PM
FBO is great.  If you're not concerned with staying 100% pure, you can also look at the GM HEI module.  Bypasses ballast resistor, cheap and reliable.

I looked into this as well.

There is a guy makes a Mopar HEI Conversion Bracket so you can install the module right under your stock dizzy.
http://designed2drive.com/

Perronix makes a "multi spark" HEI module with a rev limiter
https://www.summitracing.com/parts/pnx-d72000

Of course there would be some additional wiring mods and an new HEI coil like this you would need.
https://www.summitracing.com/parts/sum-850500

Always nice to have options and as noted above.... those stock GM modules are a dime a dozen.




Fern

Quote from: JonH on August 16, 2020, 04:08:07 PM
Here ya go...
U
https://progressionignition.com/

That looks interesting,  I wonder how reliable that system is?
Does it need an ecu or is everything built in?

Scooter



FIAARMN

still looking for option.....   thinking I'll pass on the FBO
1970 AAR Cuda Limelight Green,White Interior, - Hamtramck Built 36k miles, Verified All Numbers Match - Broadcast Sheet, Warranty Card & Window Sticker!

nsmall

Not all the reviews of FBO are positive.  Why not just buy two of these https://www.manciniracing.com/mreelcoun.html

$24 and you got a spare in case of a failure.

I am stealing this idea from Neil P.

Thanks Neil

Neil

Scooter

Bumping oldish' thread.

On the FBO kit they bypass the ballast and give full 12v to the Petronix coil, claim their box is calibrated to work with this coil only.

I already had a Petronix (40011) on the shelf from my Ford that I upgraded to a MSD 6AL box setup, so I tossed it in my Challenger.

There was a notable improvement over the stock coil.

I did not give any considerations to bypassing the ballast at that time. 

Would it be safe to bypass the ballast and give a solid 12v to the coil with the stock electronic ignition box?

Petronix installation guide says to bypass the ballast: http://www.pertronix.com.au/assets/pdf/Pertronix_Flame-Thrower_Coil_Installation_Instructions.pdf

I'm actually leaning toward converting to the the GM HEI module, already purchased the adapter plate to mount to the bottom of the dizzy.

Be interested to see if 12v to the coil makes any notable difference if possible without destroying it.


mopartaz

Anyone using MSD or Jacobs stuff anymore? or is it outdated? I used to run the 6AL box with rev limit chip.


Scooter

Quote from: mopartaz on August 29, 2020, 11:30:55 AM
Anyone using MSD or Jacobs stuff anymore? or is it outdated? I used to run the 6AL box with rev limit chip.

Have a full MSD multi-spark setup on my Fairlane. Billet dizzy, blaster coil & 6AL box with rev limiter. Pricey but no complaints and extremely easy to set, restrict or lockout mechanical timing advance in dizzy. 


Re-read the Petronix installation and it calls for 12v.. bypass the resistor.

Did not feel like hacking up the stock harness so I improvised a 50c bypass that took 5 minutes to assemble.

Step 1, shave down eye lugs:



Step 2, crimp in 14ga wire:


Step 3... profit


I zip tied the harness to the ballast for the test run. Engine runs a bit smoother at idle and no more idle irregularities when the electric fans kick in.

RTFM FTW...  :bigthumb:


Solarguy

I've been using MSD 6 with blaster2 coil and MSD distributer.  Runs flawlessly for 15 years.  The timing curve is very easy to set up on the old billet distributors using easily changeable  bushings and springs.