I always loved to race Briggs 5hp at the kart track! I knew some guys in the unlimited class that we're getting 18hp out of the blocks! Lol the only stock part of the engine was the block... And even then "stock" was a pretty subjective term
Warped Perception would have been nice to put the original head and sparkplug back on to finish off the engine. And see what actually fails not just the plastic head! One more episode??😬
I think the best part about this is the problems you ran into are legitimate problems the automotive industry ran into when they started. Really getting back to the basics
Regardless of size or HP, Briggs & Stratton engines are tough, reliable, and virtually indestructible. This engine however deserves an A+ in quality! Best in the world! #1!
You impressed me with your resourcefulness. The engine would stop, you would quickly figure out why, easily resolve the problem and have it running again soon after. You made electrodes from bolts! You are MacGuyver!
8:08 With high speed camera and transparent air intake you can adjust optimal timing for fuel injection! Note that it was not injecting at the same time the air flows into cylinder.
respect+ for this dude to stick onto this project for such a long time. absolutely loved this series. binged watched all 8 eps in the whole night. its 5am now. gn!
The engines on most modern day cars are incredibly reliable. It’s all of the electronics that are the problem, this Briggs engine is a tank because it’s is very simple.
flat head designed engines died out in the 40's or 50's for cars the reason lawn mowers still use them is because they don't need a lot of power and it's a lot cheaper
@@scenicdepictionsofchicagolife yes and I'm currently working on the second version of that rotary engine which was initially supposed to be the first episode but I ended up going with the simpler smaller design instead so everyone can understand.
cabbage I cry my heart, that this episode is the last of the series of this turbo engine, thank you for your explanations that you gave us about this engine, I do not see now that the second season of the turbo engine is coming out immediately
Been a great run Matt. I’ve watched each episode from the first upload to now and can’t say that I’m not pleased! Great work, awesome videography, ad killer content brother!
Thanks man, appriciate all the effort you have put in. I will always remeber the first time I saw HOW IT ALL WORKED. I am an automobile engineer and makes me soo happy seeing this never really knew how it worked practically, it was always theory or prectical but this real time see through , blew my mind. God bless you, wish you and ur family good luck and fourtune.
Your determination is admirable. I like how you kept trying and trying. It was very awesome to watch. Only thing I can think of is to use a nut on the bottom side so you could thread a regular spark plug through the top, but it would require more work. Like I said, excellent video and thanks for pushing all the way through.
Brilliant Series! A way to get around the turbo not wanting to boost more is to use nitrous to spool the turbo or just using nitrous without the turbo. Should be able to inject enough nitrous to cause the engine to blow without much effort. A come back with nitrous would make a brilliant episode...
i got a suggestion, why not use compressed air from a compressor to charge the engine since the turbo is not making much boost. usually a engine internal can take way more then 5 psi
Yo man. Your ingenuity is the reason why I watched EVERY episode of this series. All the fights, struggles, and issues really kind of forced you (and us) how to learn about mechanical engineering. So cool. I hope the next project is just as ridiculous and as home made as this one is.... I'm hoping for a supercharger episode for christmas
Thank you, I also find that to be true and that's why I like doing these episodes this way, as we figure out solutions for unforeseen problems we learn a lot that we didn't expect to about things that we didn't expect
Thank you for all you do.!! I enjoy your videos. They are extremely educational and entertaining. I can’t wait for the next 2.0 or next see thru engine videos to come. ⚙️
@@WarpedYT ay i got an semi old predator 212, though postage would be more expensive than you just buying one straight from the usal suspects. (harbor freight special)
The entire season I was freaking out. Not over the anticipation of the engine exploding; that had me on the edge of my seat in excitement! I was freaking over that $140,000+ dollar Phantom Flex 4k high speed camera setup you were using. It was so close to the engine I thought any minute kaboom and the camera would be toast or covered in oil, etc. Seeing that would be the equivalent to witnessing a wreck of an exotic or rare antique car. I hope it's insured! 😉
The see-through head was certainly cool and all and quite a bit can be learned about the combustion process but it was ultimately the Achilles heel of the main objective to blow it up. The head was going to fail every time before any hard parts would or could.
I think your main issue is the length of spark gap which is allowing the voltage to spike much higher than intended which in turn creates large electromagnetic interference spikes - these will induce current spikes in any nearby wiring or sensors. The fix is to shorten the spark gap back to same as speced for standard spark plug, maybe add an extra grounded bolt at an angle which will make the spark gap adjustable
Thank you.... And on to the next. That's one of the reasons I had to bring it to an end no matter what, gotta move to the next projects which are bigger and better.
The amount of work, time, knowledge and skills you've put into this thing and all this just to show it in this episode is incredible! The next episode should be to make it run on diesel - that would be quite challenging... but you wouldn't need that stupid spark! :D
Thank you, yeah I started doing that because previously I used to turn the volume way down, but then people complained that they couldn't hear the sound of the engine, but then if you're wearing earbuds it's a completely different story..lol like you said pop an eardrum!
Great video and i do like how in depth you go without getting over the top....only problem i had with whole thing is the injector not being aimed downstream so fuel keep atomised
I wouldn’t mind seeing him deject a air compressor into the intake of the turbo just to really get it spooling and put the original head on. The see thru head is what’s causing the issues
This entire series is so brilliant. It reminds me of a drunken idea i'd have with a friend and then never follow upon...good job on not only doing this series, but doing it really well. Excellent execution, amazing production, ect. Well done sir!
@@WarpedYT and you respond to comments! next level dude.....hey as a follow up, what's your background? just wondering where you got all these highly developed tinkering skills...
I loved the series man keep it up! To help the ECU receive proper input make sure you have a ground probe spaced .035 away from the spark lead, gives it a place for the spark to jump to and a proper ground. Not having a ground to the coil will cause all sorts of issues within the ignition system
I'm surprised the cast acrylic has worked as well as it has. While cast acrylic can easily handle the pressures at that thickness the temperatures are another thing. In lab settings, I was under the impression that sapphire glass or quartz glass was used which can handle the temperatures and crazing far better.
I out of all your design and engineering was bang on the weak link was the actual head itself and hey you didn't make the plexiglass or polycarbonate that was made out of otherwise everything was perfect hey it was fun watching it it was great it was brilliant I am a 69 year old retired machinist,tool & die maker and mold maker. I can see all the work you've done I have fabricated for years if I didn't have parts I'd make them thank you
Issues with the crank sensor may be caused by the stock ignition flywheel magnet. When i installed a electronic ignition to my lawnmower engine, i put a sensor to outside of the flywheel and it was giving a messy signal, then i moved it to near centre of the flywheel and the signal was all nice and stable. All n all cool experiment and a good effort !
if you follow my advice, please buy number of samples, so when you tighten them into the frame and they crack, you may have spare. the spark will have to go through copper frame, not through sapphire. the copper is because it is soft to make tight connection without cracking the glass.
Nice video dude! Keep up the great work! Also, just wondering: How do you protect your high-speed camera and other equipment from getting damaged when the being blows up? Do you place them behind a sheet of Plexiglas or something? Again, great video man!
I might have gone for broke with the iron head, but you did a great job with this series. I look forward to more of your videos on all of your channels.
I got a idea on why it failed in the end, The screw for the ignition spark looked like the hight of the threads was too small, What I mean is the bite of the screw was not so strong If you used a more aggressive screw to bite into the plastic for more grip, also heat management so be careful on your depth so its not so much in the inferno, another would be the mass of the screw/bolt so add a nut or two for a heat sink, also more technical help in future would be to use a buttress thread its use is for large forces in one direction, the thread has one flat side on one of the flanks or ise a ACME. Love your videos btw
Too bad I couldn't be there giving you more terrible advice - could have welded a nut onto the electrode bolt, and let it run way harder - but for all that effort, you'd still end up with erosion right next to the head gasket that finally punched through. Seriously one of the best endorsements of a Briggs & Stratton setup, and seeing it run so well at the end just tells me everybody who supported this effort makes awesome stuff. Can't wait to see the next generation of motor running on full anti-lag in 4K slow mo.
Thank you, I totally agree it was definitely a combination of a lot of good companies that made good products. Yes that engine will be up very soon... it's going to show its face in the next episode which is going to be a see-through catalytic converter. Boy was that a tough project to build that.
Awesome series! I would've like to had seen the OEM head on it and seen what it would've done! Any see-thru head just isn't going to hold up long enough to destroy the engine.
Thank you, yes but unfortunately it seems to be causing quite a bit of electromagnetic interference. My goal originally was to keep the combustion area free of any so we can see it in its entirety.
@@WarpedYT I wonder why that isn't a problem on "normal" engines. I don't see how spark plugs vs. arcing to the engine block could make the difference. My guess is that having a metal cylinder head shields the EMI from leaving the combustion chamber, and by using an acrylic head, the EMI isn't shielded. I'm surprised your attempt to shield the cable with aluminum foil didn't work though!
What an incredible series! Really enjoyed how you intuitively and visually connected reality with the mounds of theory. Great job!
Thank you! BTW I'm going to send you a viewer request very soon.
The slow motion filming was amazing. I just used the same type engine for a similar but different project which I just put on youtube.
@@WarpedYT it would be cool to see it run on methanol. It's a cooler running fuel might get some longevity.. maybe ?
Cornal Angus snl
Should've of raffled off the heads that went bad.
Those Briggs & Stratton engines are nearly indestructible! Great job and definitely the BEST production quality on UA-cam!!
Thanks, I got to get one of those predator engines in my hands soon !!! Lbvs
Two of my favorite UA-camrs know each other. You guys show make a crossover video!
I always loved to race Briggs 5hp at the kart track! I knew some guys in the unlimited class that we're getting 18hp out of the blocks! Lol the only stock part of the engine was the block... And even then "stock" was a pretty subjective term
Just like a TIMEX, "It takes a licken and keeps right on a tickin"
Warped Perception would have been nice to put the original head and sparkplug back on to finish off the engine. And see what actually fails not just the plastic head! One more episode??😬
I’d like too see a see-thru 2 stroke engine.
It is coming!
dishsoap1 damn ask and you shall receive lol
dishsoap1 good suggestion but 2 stroke wouldn't be as fun as the 4 stroke
Mr.engineEAR09 I think seeing the scavenging process in slow-mo would be worth it. I’m glad it is in the works.
dishsoap1 good point man 👍
Do a engine teardown. Would be awsome to see the inside of it after all of that.
Ok that's a great idea, I will have to do that on my personal channel. I need to clean it up for my exhibit anyway.
Try using a regular head and see how much power you can get
He did that last episode
He did 11 torq and like 13 hp
Here you go ua-cam.com/video/9hMnlyKZLwE/v-deo.html
You should have added nitrous oxide if you really wanted to blow it up good!!
@@schuchdan02 did that to a push mower years ago. It survived 🤣
I think the best part about this is the problems you ran into are legitimate problems the automotive industry ran into when they started. Really getting back to the basics
Difference is budget constraints
you are the best teacher i ever had, making dry theori into understandable testing in the real world
Regardless of size or HP, Briggs & Stratton engines are tough, reliable, and virtually indestructible. This engine however deserves an A+ in quality! Best in the world! #1!
You impressed me with your resourcefulness. The engine would stop, you would quickly figure out why, easily resolve the problem and have it running again soon after. You made electrodes from bolts! You are MacGuyver!
8:08 With high speed camera and transparent air intake you can adjust optimal timing for fuel injection! Note that it was not injecting at the same time the air flows into cylinder.
You're right it was not, because the sensor is already shot so the ECU is just taking a guess at the RPM at this point
It ran
14:21 noticed the spark going through the hole while in the air ? Awesome
Unless youre ending this series with something spectacular in mind, like a turbo see through rotary, I want to see this with *MOAR BOOOST!!!*
Don't worry, this is coming in the next series, all of that stuff... Very soon.
A 50 psi turbo, with a nitrous bottle blowing into it...
Time to sell it on Craigslist. “Never abused. Rarely used it.” Lol
Been waiting for this video! So cool to see boost doing its thing.
Those old Briggs and Stratton engines are tougher than I would've thought
respect+ for this dude to stick onto this project for such a long time. absolutely loved this series. binged watched all 8 eps in the whole night. its 5am now. gn!
Your skills are now to the point of spiritual insight. Awesome series
Briggs and Stratton should be making car engines.
The engines on most modern day cars are incredibly reliable. It’s all of the electronics that are the problem, this Briggs engine is a tank because it’s is very simple.
we can thank the epa they wont let car manufactures use the flat head design anymore because it is not efficient enough for them
flat head designed engines died out in the 40's or 50's for cars
the reason lawn mowers still use them is because they don't need a lot of power and it's a lot cheaper
Toyota landcruiser is pretty much a b&s engine they are just as reliable
yeah they could make something beter than a 2jz or any famous engine that is known for being able to take a 1000 shot of nitros oxide (nos)
too bad this series is over
maybe use honda engine for next series? or a see thru rotary engine, wich is my personal favourite
Haha he actually has a see thru rotary series already!!!
Go check it out!
@@scenicdepictionsofchicagolife yes and I'm currently working on the second version of that rotary engine which was initially supposed to be the first episode but I ended up going with the simpler smaller design instead so everyone can understand.
It would be difficult, to build an overhead valve cylinder head out of plexiglass. Valve seats, and the exhaust valve guide just get too hot!
@@WarpedYT that's cool dude. Wish I could check your shop out 😂 I live in Chicago too by Portage Park
cabbage I cry my heart, that this episode is the last of the series of this turbo engine, thank you for your explanations that you gave us about this engine, I do not see now that the second season of the turbo engine is coming out immediately
Been a great run Matt. I’ve watched each episode from the first upload to now and can’t say that I’m not pleased! Great work, awesome videography, ad killer content brother!
Thanks man, appriciate all the effort you have put in. I will always remeber the first time I saw HOW IT ALL WORKED. I am an automobile engineer and makes me soo happy seeing this never really knew how it worked practically, it was always theory or prectical but this real time see through , blew my mind.
God bless you, wish you and ur family good luck and fourtune.
Your determination is admirable. I like how you kept trying and trying. It was very awesome to watch. Only thing I can think of is to use a nut on the bottom side so you could thread a regular spark plug through the top, but it would require more work. Like I said, excellent video and thanks for pushing all the way through.
In the slow-mo you can see that the ECU runs a waste spark system. Been a nice series this one. Can see some serious work and effort has gone into it!
You should put that setup on a go-kart with the turbo and EFI.
Kinda sad that you stoped doing this series it helped me at hard times thank you so much for theese videos 😊😊
Brilliant Series! A way to get around the turbo not wanting to boost more is to use nitrous to spool the turbo or just using nitrous without the turbo. Should be able to inject enough nitrous to cause the engine to blow without much effort. A come back with nitrous would make a brilliant episode...
i got a suggestion, why not use compressed air from a compressor to charge the engine since the turbo is not making much boost. usually a engine internal can take way more then 5 psi
I never knew that a simple bolt was acceptable as spark plug.
Amazing content!
It’s not lol
I really appreciate your slo-mos and overall production quality!
Thank you
Yo man. Your ingenuity is the reason why I watched EVERY episode of this series. All the fights, struggles, and issues really kind of forced you (and us) how to learn about mechanical engineering. So cool. I hope the next project is just as ridiculous and as home made as this one is.... I'm hoping for a supercharger episode for christmas
Thank you, I also find that to be true and that's why I like doing these episodes this way, as we figure out solutions for unforeseen problems we learn a lot that we didn't expect to about things that we didn't expect
Thank you for all you do.!! I enjoy your videos. They are extremely educational and entertaining. I can’t wait for the next 2.0 or next see thru engine videos to come. ⚙️
2:07 omg the engine sounds so good and so smooth. sounds like a four wheeler engine at this point.
So now I can't wait for the second series to start. It's like a series on Netflix 🤣
Lol... Thanks, I never knew people would like these so much.
@@WarpedYT it's awesome to see. As I don't have the funds and time and let's not forget knowledge to do this I really enjoy whatching these videos
Netflix for men
@@mastershefu147 hahaha true story
@@WarpedYT ay i got an semi old predator 212, though postage would be more expensive than you just buying one straight from the usal suspects. (harbor freight special)
The entire season I was freaking out. Not over the anticipation of the engine exploding; that had me on the edge of my seat in excitement! I was freaking over that $140,000+ dollar Phantom Flex 4k high speed camera setup you were using. It was so close to the engine I thought any minute kaboom and the camera would be toast or covered in oil, etc. Seeing that would be the equivalent to witnessing a wreck of an exotic or rare antique car. I hope it's insured! 😉
The see-through head was certainly cool and all and quite a bit can be learned about the combustion process but it was ultimately the Achilles heel of the main objective to blow it up. The head was going to fail every time before any hard parts would or could.
I think your main issue is the length of spark gap which is allowing the voltage to spike much higher than intended which in turn creates large electromagnetic interference spikes - these will induce current spikes in any nearby wiring or sensors. The fix is to shorten the spark gap back to same as speced for standard spark plug, maybe add an extra grounded bolt at an angle which will make the spark gap adjustable
Thank you for this series and more stuff to come! We'll be here to watch it :) You're awesome
no way man , don't give up .... I love this series!
Great job megasquirting that small engine man, I can't get enough of your videos, thanks for the effort you put on them.
Ive been waiting to watch your ignition screw shoot out the top for 8 episodes now! It finally happened!
I enjoyed this series very much, your persistence and determination is great. Incredible camera & lighting work too !! Cheers !
Thank you.... And on to the next. That's one of the reasons I had to bring it to an end no matter what, gotta move to the next projects which are bigger and better.
The most nostalgic and satisfiying end that i'v see on a serie!
Thanks for the all efforts , money spent & hard work... We love it 😍❣️ keep going on...
The amount of work, time, knowledge and skills you've put into this thing and all this just to show it in this episode is incredible!
The next episode should be to make it run on diesel - that would be quite challenging... but you wouldn't need that stupid spark! :D
This series has been awesome. Deserves a ton of views and likes. You have a wild imagination.
Excellent series!
You normally only get to see this kind of stuff in a lab.
Very good piece of entertaining education!
One of the coolest things I have ever seen in my life
real educative i showed your Br and strat to my daughters to show them how an engine works they loved it specially the destructive part of it👍👍👍👍👍
Love your videos my dude! Keep up the awesome content
Thank you for the wonderful series! Keep up the great work. I hope to see more!
I like that you do a "Loudness Warning". I'm always using ear buds, so when it gets loud, talk about pop an ear drum lol.
Thank you, yeah I started doing that because previously I used to turn the volume way down, but then people complained that they couldn't hear the sound of the engine, but then if you're wearing earbuds it's a completely different story..lol like you said pop an eardrum!
Fantastic series! Thanks for making these videos, they are awesome!
Great video and i do like how in depth you go without getting over the top....only problem i had with whole thing is the injector not being aimed downstream so fuel keep atomised
I wouldn’t mind seeing him deject a air compressor into the intake of the turbo just to really get it spooling and put the original head on. The see thru head is what’s causing the issues
I can't wait to see what the next engine will be! Good video!
Pretty awesome, too bad it didn't blow up but that just shows how indestructible Briggs engines are! Looking forward to the new series!
This entire series is so brilliant. It reminds me of a drunken idea i'd have with a friend and then never follow upon...good job on not only doing this series, but doing it really well. Excellent execution, amazing production, ect. Well done sir!
Thank you, that's also how I feel at times, like it's some drunken idea!! Lol
@@WarpedYT and you respond to comments! next level dude.....hey as a follow up, what's your background? just wondering where you got all these highly developed tinkering skills...
Original head and let er eat until it melts down?
Love all the effort on the series though, can't wait for the next!
The wood screw bouncing around the table near the flywheel reminds me of final destination. Lol
Awesome job, stuck watching the whole episodes, i was excited to see how this engine evolved, i thought we might see it on a plane 😂
One of my favorite series on youtube I've watched :D Thanks fam
Your work should be seen and studied un every mechanics or engineering school, college and universities. Thanks for sharing with mortals!
Awesome series would liked to see it with nitros and turbo to make more boost
Ka pai!
An epic conclusion to an epic series.
I loved the series man keep it up!
To help the ECU receive proper input make sure you have a ground probe spaced .035 away from the spark lead, gives it a place for the spark to jump to and a proper ground.
Not having a ground to the coil will cause all sorts of issues within the ignition system
I'm surprised the cast acrylic has worked as well as it has.
While cast acrylic can easily handle the pressures at that thickness the temperatures are another thing. In lab settings, I was under the impression that sapphire glass or quartz glass was used which can handle the temperatures and crazing far better.
David Freiburger approves the dyno clamp method !
i see a briggs .. i see a turbo, you just got a new subscriber!
You are a crazy man, I like to see the engine make the explosion, nice video
R.I.P ENGINE
Now lets start a new series
Engine didnt Die. Platic head did.
I would put this in my car and probably race most the Hondas around my area. Great series,
I out of all your design and engineering was bang on the weak link was the actual head itself and hey you didn't make the plexiglass or polycarbonate that was made out of otherwise everything was perfect hey it was fun watching it it was great it was brilliant I am a 69 year old retired machinist,tool & die maker and mold maker. I can see all the work you've done I have fabricated for years if I didn't have parts I'd make them thank you
Pull the engine apart, let us see the wear.
I love the shot at 8:08 injector injects, then the intake valve opens and sucks in the fuel.
Thanks... I thought that was cool as well, unfortunately the injector timing is completely off because the signal being sent to the computer is off.
Do a see through diesel engine😂
SRT4 Life the head would blow off the first rev
Issues with the crank sensor may be caused by the stock ignition flywheel magnet. When i installed a electronic ignition to my lawnmower engine, i put a sensor to outside of the flywheel and it was giving a messy signal, then i moved it to near centre of the flywheel and the signal was all nice and stable.
All n all cool experiment and a good effort !
if you follow my advice, please buy number of samples, so when you tighten them into the frame and they crack, you may have spare. the spark will have to go through copper frame, not through sapphire. the copper is because it is soft to make tight connection without cracking the glass.
great series , and thumbs up to brigs straten, i have punished Honda GRX in normal operations but many makes would have broken
Nice video dude! Keep up the great work! Also, just wondering: How do you protect your high-speed camera and other equipment from getting damaged when the being blows up? Do you place them behind a sheet of Plexiglas or something? Again, great video man!
17:45 better than UA-cam rewind
I might have gone for broke with the iron head, but you did a great job with this series. I look forward to more of your videos on all of your channels.
Thank you!
Maybe in the next mission, try running methanol. Great power and runs much cooler! May keep those see through heads intact for longer!
The slow motion cam and the music chosen is a really good touch ..well done bro!
This guy deserve more subs!
Shoulda put the aluminum head back on and ran it loaded till it blew
I got a idea on why it failed in the end, The screw for the ignition spark looked like the hight of the threads was too small, What I mean is the bite of the screw was not so strong If you used a more aggressive screw to bite into the plastic for more grip, also heat management so be careful on your depth so its not so much in the inferno, another would be the mass of the screw/bolt so add a nut or two for a heat sink, also more technical help in future would be to use a buttress thread its use is for large forces in one direction, the thread has one flat side on one of the flanks or ise a ACME. Love your videos btw
Oh Matt, the music near the end. Good by see-through engine. You were a good friend!
Thanks for the sound warning it saved me from earrapes
Too bad I couldn't be there giving you more terrible advice - could have welded a nut onto the electrode bolt, and let it run way harder - but for all that effort, you'd still end up with erosion right next to the head gasket that finally punched through.
Seriously one of the best endorsements of a Briggs & Stratton setup, and seeing it run so well at the end just tells me everybody who supported this effort makes awesome stuff.
Can't wait to see the next generation of motor running on full anti-lag in 4K slow mo.
Thank you, I totally agree it was definitely a combination of a lot of good companies that made good products. Yes that engine will be up very soon... it's going to show its face in the next episode which is going to be a see-through catalytic converter. Boy was that a tough project to build that.
Awesome Series.
That was a mixture of theory and action
I really love it.
Thank you !!
That so beautiful burn !
Should really angle that injector towards the engine
And not have the intake pipe come against gravity
It makes me happy to see the nitro not going through the turbine anymore.
Haha!! Me too!
Would love to see if it’s possible to visualize the oil line processes in the engine as engine runs
I watching you from Turkey. You are very professional
Thank you !
Awesome series! I would've like to had seen the OEM head on it and seen what it would've done! Any see-thru head just isn't going to hold up long enough to destroy the engine.
ua-cam.com/video/9hMnlyKZLwE/v-deo.html
Boosted and an ecu for a Briggs 😂
Wow this is crazy 🔥
I like how you never bother with those new fangled "spark plugs". Just let it arc directly to the engine block!
Thank you, yes but unfortunately it seems to be causing quite a bit of electromagnetic interference. My goal originally was to keep the combustion area free of any so we can see it in its entirety.
@@WarpedYT I wonder why that isn't a problem on "normal" engines. I don't see how spark plugs vs. arcing to the engine block could make the difference. My guess is that having a metal cylinder head shields the EMI from leaving the combustion chamber, and by using an acrylic head, the EMI isn't shielded. I'm surprised your attempt to shield the cable with aluminum foil didn't work though!
Sitting here at 12:50 at night wondering 1: Why am I not asleep, and 2: Where did I go wrong with life.