Emissions stuff. The coil/plug fires once to ignite the charge, then again on the exhaust stroke in an effort to reignite/burn off any remaining fuel/air before it exits the cylinder.
Thoughts on MSD Ignition Coil Rail?
- Thread starter Amberfire01Tj
- Start date
Emissions stuff. The coil/plug fires once to ignite the charge, then again on the exhaust stroke in an effort to reignite/burn off any remaining fuel/air before it exits the cylinder.
I think the points being made against are primarily around what scientific principle is at play that would cause us to need to try it? It is established that the existing coil is more than powerful enough to jump a large gap. The PCM is in control of when & how long the spark will be, so what possibly could the MSD being doing to improve the performance?
We're not (necessarily) not arguing with your results, we're asking how could it possibly do what you claim given how the OEM unit already works?
Kered Nella
New Member
I work in the automotive industry in Detroit, an engineer friend at Ford once told me that ignition coils don't put out at 100% forever over time they can weaken from extreme heat and cold I know of one instance where someone wrote about misfire and coil failure in an 05 tj. I don't know what the failure rate is however, I would be curious.
Stop trying to claim or infer you have ignition system expertise because you "work in the automotive industry". There are many including janitors, assembly line workers, secretaries, accountants, suspension engineers, tire specialists, etc. who also work in the automotive industry but they sure wouldn't try to claim expertise in ignition system technology.
It's abundantly clear you're not an ignition system engineer or you'd easily have understood by now what we've been trying to tell you why replacing the OEM coil rail with one from MSD won't make a performance improvement in a TJ. You totally ignored the several reasons given why it wouldn't help and never responded to any of those points. That you recently decided to add that you "work in the automotive industry" clearly, in your case, clearly doesn't mean you have any technical knowledge of ignition systems.
It will be within a few data points of how long the MSD product lasts and likely more than a lot better. I typically see 200,000 out of the OEM coil rail and even then it is never a diminished performance issue, it is an outright failure.
So, you had your engine stroked and blueprinted - and you gained six HP on the dyno? You must have been quite dissapointed…
Or perhaps you just need to learn to write a bit more clearly.
There you go again, trying to flex on us with your 10+hp gain.
Was that from 8 E3s and a Fram filter?
Don't get me started on E3 spark plugs either, they're right up there with throttle body spacers on the TJ and tornado air intakes which are all pure snake oil products lol.There you go again, trying to flex on us with your 10+hp gain.
I love how they market their plugs as some special, new design.
Here's just a few pre-WWII designs.
Kered Nella
New Member
First of all I never mentioned anything about being an expert, my field is on board data systems. As a hobby I have had four jeeps from tj to lj and I know them from from all points from build to teardown. I will reiterate, sitting back and making statements about a product that clearly you have not purchased, tested or tried is just a speculative talking point.
Furthermore, considering mopar no longer makes an OEM ignition coil for the tj a part that is over fifteen years old there will be substitutes made to fulfill the need of jeep owners. In most cases those parts will be better constructed and in many cases meet or exceed oem specs. I will end with this yes I have worked in automotive 17 years now, some departments have teams to research, develop, improve and revise parts and ideas. Trial-and-error is a major part of anything to be produced and mass manufactured again buy it and try it before saying it's not any good.
Not entirely true, I've got a collection of lovely tickets and they're both printed and official...speed verified by radar to boot!
OK.. I can't lie. I have the MSD ignition rail. I have zero ignition system expertise. There. I said it.
Traded a set of Toyota Koito H4 headlight housings, a cheap Amazon shift boot and a cheaper Amazon leather steering wheel wrap, for a new, sealed box MSD Ignition rail plus a bag of Doritos and six pack of Sam Adams... only because it's red. And I like red. The Doritos and Sam Adams were red too.
Truth. The rail made zero change in performance either way, but it makes my balls swing a little lower when I look at it so.. I'll keep it for a while. I still have the OE rail in the event the MSD unit shits the bed or my balls begin to retract when I open the hood..
Traded a set of Toyota Koito H4 headlight housings, a cheap Amazon shift boot and a cheaper Amazon leather steering wheel wrap, for a new, sealed box MSD Ignition rail plus a bag of Doritos and six pack of Sam Adams... only because it's red. And I like red. The Doritos and Sam Adams were red too.
Truth. The rail made zero change in performance either way, but it makes my balls swing a little lower when I look at it so.. I'll keep it for a while. I still have the OE rail in the event the MSD unit shits the bed or my balls begin to retract when I open the hood..
Kered Nella
New Member
I have been running an MSD coil for two years now with no problems however, if your setup is pure stock there will not be any noticeable gains and it will look nice. I have a stroked 4.0 with a super charger and there are definite benefits with the MSD compared to the stock rail.
Is that benefit actually listed on the tin? If not, I feel like they've missed out on a marketing angle...
^^^^^^^^ That there is funny..Is that benefit actually listed on the tin? If not, I feel like they've missed out on a marketing angle...
A stroked 4.0 with a supercharger might have similar results, but likely cost a shit-load more...
Are you running an intercooler with that setup?
I’d love to see the charts from the dyno runs you mentioned. Post them up if you have them.
Kered Nella
New Member