Ignition Coil Dwell Testing and why cheaper isn’t better - Tuned By Shane T

[@harkyontrack865]

an original Bell ( helment ) add had the sales pitch “ if you’ve got a cheap head buy a cheap helmet “ it applies to SO many things

[@SuperbikeUnlimited]

1 dislike - that Amazon seller found your video. 😂

[@Bacongrease00]

First video of yours I’ve watched but great information appreciate your honest evaluation.

[@Shiznit304]

Great explanation and lab setup!

[@RGHTBrainDesignDrive]

Time and Time again, I can share this into new bickering arguments. Thanks Shane.

[@TunedbyShaneT]

RGHTBrainDesign welcome sir

[@ashteregg2133]

why have you not got 1mill views you are next level awesome work

[@superdve1]

Good job Shane. Gotta be careful with Amazon race parts for sure. Knock off coils might be ok for a normally aspirated Nissan Leaf, but not for 400 kPa heroes.

[@TunedbyShaneT]

Dave Buckshaw, Technical Film Producer zactly!!!

[@opera5714]

I really enjoyed that. Expensive is great, but I have a fondness for cheap. That entire test setup (minus pressure chamber) can be done by many for under $100. I'll have to build one for my guys. I designed the Dwell Spark LED retrofit for the Sun Distributor machine.

[@TunedbyShaneT]

I think the word you are looking for is valuable, not expensive.

[@4g63spdfreak]

Welp just got my race-grade coils installed based on this video, my tuner said they're great coils but I paid double cause haltech and aem coils are identical. live and learn RIP

[@kellyr9388]

Fantastic demo

[@tptrsn]

I'm not sure why you want to share all of this information with the world, but I'm glad you do! :) Would you mind maybe showing, or even just say real quick here, what the difference is that you see on the scope with the real coil?

[@TunedbyShaneT]

Hammerhaus Kennel output energy is less for same dwell charge time.

[@tptrsn]

TunedbyShaneT Thank you!!

[@aDaWaN]

That is the final conclusion, but I think you can even deduct more information from the graph shown after 6:40. The amount of energy stored in the primary side of the coil is 1/2*L*I^2. If the induction of both coils is the same (which it seems as the slope at the start is very similar), the amount of energy it can store is equal to the square of the current. For the cheap coil the current flat lines much earlier and lower. The final current of the good coils is double, meaning 4x the energy! The graph also shows that running longer dwell on the cheap coils will not increase current and thus spark energy. One last thing of note: if you do not need the spark energy, running shorter dwell times will reduce the current and thus the heating of the coils and can be beneficial to the lifetime of the coils. Last comment: cool setup and educational video!

[@opera5714]

@@aDaWaN Hope you have grabbed a copy of the book Gaseous Conductors by James Dillon Cobine. I use that book more than any other reference.

[@Teglove]

Good stuff,you should do more videos like this. Newbies like me even understand this lol

[@igqfresh]

curious what a flow chart will look like for an ignition coil failsafe options. if ignition coil dwell times are outside of required settings, set boost psi to 0, disable WOT, max rpm to 3000. curious what a fail safe setting will be when ignition coil temperatures are too hot. Mr. T as always i appreciate your sharing experiences! I am waiting for a tuners text book, author: Tuned by Shane T. will surely be SEMA's best seller!

[@flashtuner5716]

Good point there ShaneT, why save few dollars when spending thousands on a project.

[@TunedbyShaneT]

Flash Tuner precisely

[@greggreg6975]

Thanks mate!

[@macgyverdroid]

Hey Shane just a question. Does dwell decreases when rpm goes up? Or in the standalone ECU can be tune steady on any rpm? Or can be set higher dwell when on high rpm?

[@TurbineResearch]

Thanks for the videos 🙏 man a lab scope is an awesome tool.

[@darinlewis007]

Can you show how much different voltage effects the output? So say you lose an alternator when you are at the track and it’s running 12.2 volts during the run instead of 13.8 or so. Thanks

[@camaro69blk]

Wow. This is very thorough. You don't happen to have the optimal dwell time for stock k20 coils would you? I've heard they can only take about 1.8msec

[@graycenmashburn3]

Shane - I am curious, have you tested the IGN-1A coils supplied from Haltech against the Race Grade product? Thanks, Graycen

[@TunedbyShaneT]

Graycen Mashburn no sir only Racegrade against this “other” coil.

[@nathanrice1796]

Could you tell me what any of the name brands of any of those ignition systems are?

[@TheAnonymous1one]

Great video! You get what you pay for!

[@bradpittman5075]

This video is awesome. You’re smart. Just found you. Super cool video.

[@christopherwhite8877]

Dead on point.

[@idus]

Could this setup with a couple diodes and capacitor do ion sensing? Tuning for peak calendar pressure?

[@nathanrice1796]

Aren't there some kinds of ignition systems that allow you to 'set the dwell' versus RPM?

[@TunedbyShaneT]

Yes typically the main adjustment is by battery voltage with additional adjustments for RPM and sometimes engine load

[@novafreak69]

yo... how much to send you a set of 8 coils to test and send me back the results?

[@mrmete]

Hey Shane can you do one about dwell vs battery voltage vs rpm please

[@scottneels2628]

F-n Love it!

[@justins.2415]

More expensive is not always better some companies work on “perceived value”. If it’s more expensive you perceive it to be better even though they are just marking up the cheapest thing they can get there hands on.

[@johngrosso6631]

Hey Shane. Is dwell time reduced the higher the rpm that is present. Like on my turbo vr6 theres a dwell table and Im tryn to understand it to set it up. U seem like u kno wat ur talkin about and ur equiptment set up and testing shows it. So if my coils safe dwell time is 3.2 ms, should I set it at 3.2ms at 500 rpm give or take, and then at 8000rpm set that to 2.5ms, and then trend that through the rpm? or keep at 3.2 ms through the whole rpm? band?

[@TunedbyShaneT]

The dwell should be set to match the peak output of the coil based on the battery voltage. Because the charging time is a fixed value, it becomes a larger percentage of the “cycle time” as the engine speed goes up. In other words there is less resting time the higher you rev the engine. This could result in overheating the coil, which would be the only reason I can think of to reduce dwell with RPM.

[@johngrosso6631]

@@TunedbyShaneT K thanks shane.

[@johngrosso6631]

Hey and also so if the coil isnt charging enough the spark would be smaller or weaker right? Like say my coils max charge time is 3.2ms and I reduce that time to 2.5ms and test the spark, it would have a smaller spark right?

[@TunedbyShaneT]

If the peak output for a particular voltage is 3.2mS then yes anything less than 3.2mS will have reduced spark energy. You can think of the dwell time as a throttle for the spark output. The less you use under peak output, the less spark energy is available.

[@johngrosso6631]

@@TunedbyShaneT thank u very much and this is exactly wat I thought. Its weird cuz a lot of people think the spark will be the same and makes no sence to me. Thats y I asked u cuz I knew u would know the exact answer. Thanks man. Just a lot of people mis inform people.

[@flashtuner5716]

Shane, do you offer any kind of training?

[@TunedbyShaneT]

Flash Tuner not really, I’m not qualified to teach and I’m not setup for training. Try EFI University or High Performance Academy

[@rageauto1291]

this is the EXACT issue i have on my GTO right now

[@e34boat88]

very true!. even on low budged turbo build like 2 to 4k i would atleast get good ignition parts and fuel parts.

[@boyou2]

Haha Shane you made my day ^^ You get what you paid for :D

[@TunedbyShaneT]

boyou2 glad you liked it!!

[@antonioblack121]

Fucken legend!!!

[@johnb2614]

gREAT rANT

[@larryoakley8099]

You and ScannerDanner should work together.

[@Go4BrokeOffroad]

A broken aluminum rod and block are more expensive than correct parts.

[@MrSmokin04]

Man, that "stabilization feature" did NOT work. Great content but hard to watch.

[@1magnit]

You've got lots of things wrong with your test setup. Your plug at atmospheric pressure, it's sparking at only about 3KV. You connected the scope to the secondary side which you never do, it loads the circuit and distorts the numbers by 50%, you're over dwelling the coil and you don't even know what saturation is?

[@TunedbyShaneT]

1magnit the test setup, pretty clearly illustrates the difference between the good coil and the bad one, regardless of what you think of it.