F355 ignition upgrade

You may find this interesting. Jeff Davison began this thread in 2004 and only a few weeks ago reported it is still going strong.
Entire project is 100% reversable

https://www.ferrarichat.com/forum/threads/f355-coil-on-plug-conversion.36012/

I am in the process of installing and Qavion has created schematics to make it easier. Will post soon.

 

I'd love to hear any updates on the CoP project.....really enticing if it actually improves performance.

 

I will be happy to report my findings on Jeff's original thread, but I think your question was answered by Jeff in post #13 back in 11/2004:

"OH BABY! LIGHT MY FIRE!!!!!

Just did an initial shake down. Great results. Start up is faster, idle is much smoother, off idle acceleration smoother. overall the engine has much crisper acceleration at all rpms. NO check engine lights. Bosch 5.2 Motronic is happy.
Comes "on song" quicker and sings in a purer tone! Maybe a few, seat of the pants, horsepower as well

me so happy"

and again, as he reported just a few weeks ago in post 324:

"It's been a while since I logged onto my thread, but as of today 3/12/2022 all is still well and functional and no glitches.
JD"

That's impressive after 18 years! Hoping to replicate his findings. (also, a few cool updates...)

 

Sounds good to me. MSD makes great stuff, I have their 6AL CD box on my early 911 with carbs. I'm always inherently skeptical of anecdotal claims people make on car forums after mods, because it's so unscientific and there is such a strong desire to believe that something we worked hard on achieved the results we wanted. Not saying it's not real, but I'm not sold...yet.

 

A skeptic is a man of science. This is the correct way to examine these mods. Unfortunately, I will not be doing any before and after dyno runs, so my input will also be subjective. However, the logic behind the project seems sound.

 

An "upgraded" coil can improve performance only if the original coil was a bit "tired". I would say that this MSD coil has certainly well upgraded looks.

 

Interested in learning more myself including reviewing schematics and parts info for those interested in sharing. Sounds like a solid no nonsense upgrade.


Sent from my iPhone using FerrariChat

 

Nice upgrade does that coil have multi strike spark build in or is it just a high voltage coil ???


Sent from my iPhone using FerrariChat

 

Ok, I'm a little naive on this but what's the benefit of a higher voltage coil? You have a gas in the plug gap (air/fuel mix) which is compressed. The pressure and temperature and the geometry of the plug all factor into the plasma break down voltage. If the voltage applied to the plug exceeds the break down voltage a plasma is generated and a spark occurs. The spark ignites the mixture and at that point it's job is done. From there the flame front propagates across the combustion chamber. I understand that the break down voltage increases with higher compression so higher voltage coils may be needed on turbo charged engines. But what is the advantage for an engine that is currently running correctly? Higher voltage will result is higher current through the plasma, hotter spark, but if the spark is sufficient to ignite the mixture in the first place why would matter? Some of what I have read seems contradictory. Example, "Higher voltage allows for a wider gap." follower by "Higher voltage yields more current." But if the gap is wider, the plasma resistance is higher so the current won't necessarily be higher.

Educate my dumb a$$.

 

Maybe a higher voltage coil is able to maintain a proper voltage at higher rpms? Here's the blurb on MSD's capacitive discharge system, not the updated coil:

Image Unavailable, Please Login

Or maybe their updated coil has capacitors in it, too?

 

You have to put the lime in the coconut first

MSD is nice of you want to flood it with fuel and pressure and make big explosions.
On first hand experience it cleans up the damage a crappy carb or fuel system makes. Cleans up a few flat spots, idle, mid range. Never seen it fix high rpm.

Boy did I dance around that not to make someone madddd LOL

Herr's a msd box I had for a while when I was playing with their stuff running at different rpms

 

BTW I did the same "mod" on my MIG welder with a big capacitor LOL

 

I think we are conflating two different topics: The OP was about an upgraded MSD branded dual coil pack v. MSD capacitive discharge ignition module.
Two different monkeys.