S4 E30. MPG & We modify the 670 cc Predator camshaft by removing the compression relief.
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- เผยแพร่เมื่อ 16 ต.ค. 2024
- PATREON / robotcantina
Season 4 Episode 30. Jimbo opens up the 670 cc predator engine and removes the camshaft so it can be modified. Will removing the compression relief mechanism make this V-Twin hard to start? We will find out Jimbo takes the 1969 Renault with the modified predator engine out for a test drive to measure the fuel consumption. During the test drive Jimbo encounters another problem. Can this engine be saved?
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Robot Cantina
207 S. Sedgwick Ave
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Haven KS, 67543
Its funny to me, that your Blue, is in fact, Blue. Hopefully the culprit of the excess crankcase pressure isn't abuse nor the cam, and a simple failure that can be remedied with better parts. Looking forward to the next one Jimbo!
LOL, Hi Eric. The engine issue is still a mystery, I'm digging into it right now. It probably would take 15 min to figure it out, but as you know when filming it take a lot longer. Stay tuned!
@@robotcantina8957 Turbo and send it.
Hang on, I'm kinda old so maybe I'm just confused. I thought his name is old Blue, so that would make his pry bar Eric? lol
Maybe he can donate a small car engine/trans someday for a future project. A little gas 3 cyl would be cool? Did the American versions of the Smart car ever have them. I think the overseas versions had a diesel 3 cyl turbo diesel available? Or take a commonly available 4 cyl and convert it to run without an ECU/FI? Or how bout an LS swap...lol
I always wanted to see a propane forklift engine in a car...
I love when Blue comes out for a visit!
Jimbo needs comments to drive the algorithm, but doesnt want to answer questions that have been previously answered, if only youtube would let you search the comments. However, if Jimbo can get you to watch old videos, that helps drive traffic as well. Keep up the great work Jimbo!
@@elitecpudoc329 Jimbo's videos are timeless
Yeah…. I still don’t get the Blue reference. Everyone is like, “hahaha. Yep. Another TH-camr uses Blue.” It’s still an inside joke…. I need someone to explain it to me like I’m five.
@@johnramsey2009 th-cam.com/video/qJ1LsxFpfCQ/w-d-xo.htmlsi=RWHk5StAPnQpjRac&t=889 (gonna have to copy/paste that probably) It's a prybar for Eric from I do cars youtube channel.
potential oil fire? LETS PULL OVER NEXT TO THE GIANT WALL OF HAY!
Good point! lol, I reckon that wasn't my best decision.
To be fair, he didn't know all of that was going on. The car has a leak on the transmission.
Meh, what's the worst that can happen? :D (Don't answer that!)
Think of all the views that video would've received!
I wonder if that would've been enough to reimburse the farmer. Eh, it's probably a good thing we didn't find out.
Who doesn't like a good bonfire?
(the farmer who owns the hay doesn't)
Love the blue reference. Eric has a sense of humor worthy of your sarcasm level!
Crossover episode 😊
We have a shaft and two balls.
DON'T
@@Big_Loo we need to do the next eric thing and blur it all out like those water pump bosses
Seeing baby blue was nice
Alot of the fuel economy folks are a one trick pony. This project is huge and fuel economy is not the focus. Most of us don't care.
This channel is like an ogre: it has layers.
Oh! Like a cake?!
Did anyone else read "Ogre" as "0rgy"? :D
@@Reman1975 I think that might be just you.
@Reman1975 however, I cannot deny that I did laugh. I can see how one mightve done that
this channel is like an ogre: you don't want to use the bathroom after it does for like a while day maybe more
I watch Robot Cantina and then go directly to "I do Cars" and watch Eric do his thing. My Sunday mornings are so relaxing. Thank you.
Yep, then a guy has to wait the long wait til Friday until Derek posts.
@@jdbertel33 South Main Auto might pick you up during the week.
@@buffuniballer “hey there viewers!” Does deliver that dopamine hit.
Borrow cars and cameras 670 for a collab 😅😅
I usually do I do cars Saturday night
I really appreciate the metric conversion from Miata to MX-5, thank you Jimbo.
I almost commented last video about suspect compression. It explains the egt variances and low rpm carb tuning, compression release mechanism notwithstanding. It will also give bogus air fuel readings since it's an average from one sensor across both banks.
Looks like it's time to throw a cheap quart of oil in the boot as well.
All that said I really enjoy following along with these frankenprojects. Thanks for bringing me along for the ride!
If I gotta guess about which cylinder is blown I'd say it's the one with the lower EGT, but I have no idea what it actually means so whatever
Loved the shifter jiggle animation
LOL, thanks! that took me about five minuets to animate.
Love your "Blue" reference. I Do Cars is awesome. Great sense of humor. Great personalized plate.
Right on!
@@dereksmith1803 have wondered where to get such a pry-tool myself…
@@dennisyoung4631I think the I do cars one is a kobalt. Although it looks like it might be discontinued (at Lowe's) in favor of the Craftsman.
The mini blue was a funny addition to the video. Great work, as always.
You blue it .-.
@@Adam-nv9zo it would have been better if I said you blue the whistle on that lol
Been here since the first 212cc insight video, sad to see TH-cam hasn’t picked you up in it’s algorithm yet, keep up the great work
I rode the algorithm wave twice now, I'm hoping it shows up again soon.
🎉2336 Towards the back of the motor what was that Looks like a splash Of something
Mad respect to guys like Jimbo! 70 year old and stil rigging them thingamajigs
I recon you did the nicest thing anyone has ever done to a Briggs & Scrap 'em engine, second hand oil is such a treat!
IDC reference to go with the VGG sticker under the Honda's hood. Wonderful! Now add some W Wes W to round out the 4 corners of quality weekend YT entertainment. Glad to have RC in the mix. Thanks Jimbo.
10.5 volts while cranking looks good to me 👍
It's a lot better than 7! 😎
My favorite content, Engines and Electronic Jerry-rigging all put into one video series!
I love these videos. The narrations you do on them are great and you have an excellent voice for it. On a side note I had an R10 as a teenager and it got 35MPG on the highway.
Thanks for the kind words. So it sounds like we managed to get the fuel economy about right on this project..
My father had one in the late 70s. Surprisingly comfortable to drive, except the floor pedals seemed too far to the right. (Left hand drive).
My sister finished it off when she ran into the back of a salt truck. 😂
(She was fine)
@@muddywater6856 The seat were one of the best parts of the car. They were very comfortable at least for me they were, but then I was a lot younger back then.
I absolutely love doing things like this
Unfortunately my days of doing so are past due to a disability that was caused by working on a car. I bought my buddy a case of beer to help me work on my car in his garage. Unfortunately he got into the beer before we started working on the car. The result of that was him bumping the car off the jack stands while I was underneath it. The car crushed me pretty good. Screwed my back up pretty bad, collapsed a lung, put me in the hospital for 9 days. Ultimately it made it so I was unable to work and have been on disability now for 15 years. So, watching someone else do things like this is better than nothing. I'm still able to keep the brain working by watching, even if I can't participate. Thanks for giving an old electro mechanical technician something to watch. Keep em coming please! Edit: does that BFE sticker stand for what I think it does? Lol
Unfortunately I'm late, but every time I put a car on axle stands I bump it as hard as I can (without denting it or breaking my wrists 😅).
Better worry about a crushed car than a crushed man...
Thank you for giving even more sense to my seemingly craziness.
I look fwd to watching these for the same reason. Im retired from blue collar jobs my whole life and can no longer build things.
A bad fall put my DIY days to an end. Don't worry, I hear in heaven we get a nice workshop and any snap on tools we want.
@@virollaI should have had wood blocks under it instead of stands. It was a gravel floor not concrete. That damned hindsight vision and all ya know. Thankfully it was a smaller car and I actually self extracted before anyone had a chance to help. I thought I was fine until about 10 minutes later when the adrenaline wore off. Then the pain hit like a train.
@@georgeorwell3573I have managed to find a couple hobbies that help that don't require much physical exertion, the latest is refining precious metals, mostly silver because I can afford it. Nothing quite replaces building something with your hands though.
Indeed the BFE sticker is what you think it is.
As a small engine mechanic I was flabbergasted that the cam mode worked. Well done!
How small are you if you don't mind me asking?
@@samteks125 He only works on Gnome et Rhône engines ;p
I got eggs and bacon sizzling on the griddle with some robot cantina on the kitchen TV. What an awesome way to start Sunday morning. Also thoroughly enjoyed the blue reference.
Oh boy can’t wait for another engine teardown
I love the "unecessary" explanations quite a lot because it often makes me notice things, that otherwise wouldn't have crossed my mind (I am probably the most skilled at electronics at my workplace. Im a physiotherapist though :D )
Many people look at what you have there and think how small and simple it is. They don't appreciate the incredible amount of research and development that has gone into that. Even the transmission from that engine to the car transmission is next level stuff that took hundreds of hours to devise and everything is one off buddy. Cheers Love this stuff.
Thanks!
Brilliant, thank you Jimbo, and I want to call out a couple of things in the video that seem like a significant improvement on the already great videos that you produce:
1 I love the editing and production on this video, especially the part showing the bolts and nuts and belts coming off, the coffee machine and the graphics inserted into some of the still shots, you've got to love that hamster graphic. Top shelf editing and composition IMO.
2 I really appreciate that you take the time to explain stuff for the benefit of those who know less about engines that you do, and the way you do that is great, you're not talking down to anyone, you're just explaining stuff and I'm sure that helps reduce potential flame wars in the comments.
I certainly do appreciate the reference to 'Blue', I spend far too much time watching Eric's videos, but they are good.
Thanks! I also spend too much time watching Eric take engines apart.
23:46 That 670 sounds amazing, you about got that thing dialed Jimbo !
Eric’s ‘Blue’ is his go-to when the tuff gets goin’!
Dont know much about about compression relief, but the narration to these videos is perfect stress relief.
This is a most interesting channel for us tinkerers! Thanks for consistently great content. One of the steps in field diagnostics is to determine the last service/repair work that was done. (If the operator/owner will tell you.) Camshaft castration could be investigated as a possible mode of failure.
Ooooh Blue! 😂
I was also 1/2 expecting you to throw a water pump Jimbo! 😂
LOL,
Were praying for her to be okay :) Thanks for such a awesome video :)
I saw this mechanism 2weeks ago the first time when a Honda was completely submerged and after coming out of the water started withouts hydro locking and I was whaaaaat how?
And that's exactly how.
This flywheel mechanism at the camshaft left the exhaust valves open for the water while cranking.
And now I see it again on your channel :D
I so want to see this car do 1/4 mile at the track, predator absolutely screaming, just to see what a crowd reaction would be!
Would it outrun Aging Wheels' Trabant? (Just over 26 sec)
[Random algorithm appeasing comment (All heil the algorithm. 😁)] - When you mentioned "Disaster" I was getting a tad concerned*. I was picturing the outro being one of the gnomes signing your leg cast as a scrap yard truck was loading up the twisted remnants of the Renault in the background.
(* Remember that I'm a British bloke, so to help translate that emotion into American, "A tad concerned" is the approximate level of worry we outwardly show when something happens like a gas explosion destroying our house and us being alive, but trapped under all the rubble........ The only occasions where it's acceptable for a British man to go anywhere beyond "A tad concerned" is when a loyal dog's portrayed as getting injured in a film. In that situation we're allowed all the way up to "A smidge sullen" (but only for 15 minutes maximum, and never within the sight of a lady).
I once heard about a British soldier who had an outburst on a WW2 battlefield after he got sh0t in the stomach by the Jerry. Apparently he responded to a level that others described as him "Acting frightfully annoyed" as he continued running across no mans land (Rumour has it, he was so annoyed that he didn't even stop at the half way mark for a sit down with the customary mug of tea !). He was court marshalled the following day for behaviour unbecoming of a British gentleman..... The firing squad had to stand in a circle around his hospital bed to sh00t him ! 😲).
(PS. I'm going to go now. When I follow two semi serious sentences with two whole paragraphs of stupidity, I know that the (Reasonably strong) painkillers have kicked in, and they're turning my thought processes into porridge again. :D)
The best comment I have read in a long time! Cheers!
Thumbs up if you want to see him do a long road trip with one of his project cars
I would love to see him take a nice road trip like they do on Roadkill. That would be freaking epic!!! Simething about taking a project vehicle on a long road trip just is the ultimate to me too. Great suggestion!
Is there such a thing as life boats for cars?
Sunday morning relaxation time
Love this stuff! Nothing beats Harbor Freight and weird little cars.
I'm so glad that you know Eric from I Do Cars YT channel (yes, i understand the reference at 7:26)!
My dad said his boss would say; "I love hard work, I can sit and watch it for hours." They were putting on hot tar roofs in summer. 🤨
ANY pressure in a crankcase is too much pressure. It should be under vacuum. Just for those who may not know, 'cause you don't know what you don't know. Trust me, I know!
So where is the high pressure in the crankcase coming from?
Bypass… it’s always bypass. Because bypass is the only source of pressure. Don’t know how many hours on the rings & cylinders but they could either be worn out or not worn in. Could be improper ring gap to though. May have high gap in preparation for boost heat or Nos…
@@giggiddyHead gasket blown between the cylinder and hole for the pushrods will send pressure into the crank case. Common on Briggs overhead valve engines.
@@giggiddymore importantly where does the supposed vacuum come from?
When theres not a hose attached to behind the throttlebody anyway
@lassikinnunen Exactly. Thank you.
Vacuum in the crankcase is only possible with Positive Crankcase Ventilation engines. That was an early eco adaptation, to prevent oil fumes from the crankcase being vented to the atmosphere, though it really wasn’t much help for the environment. It helped keep smells out of the passenger compartment, more than anything. Conventional engines ran with a small pressure in the crankcase, vented through a carbon filter, though when they got old and worn it was still possible for crankcase pressure to blow the dipstick out of the tube, or on Fords, to blow the filler cap off. It was a fairly common mod to deliberately puncture the carbon filter and run a hose from the vent to somewhere underneath the car, just to keep it going for another year or two.
I also love Eric's journies of discovery of malice in the combustion palace and forbidden glitter 😃
Every Sunday my almost 5-year kiddo and I watch the “little car that could” aka the insight, but he does call this one “The Fridge” since he thinks it looks like an old white refrigerator on wheels. Thanks for all your education and great video content/editing!
I can't wait to see the results of your investigation into the crankcase pressure. Watching the scientific approach is the most fun for me.
Great episode, thanks. Also nice to see Blue's smaller brother appear in your channel! I must have watched 40 or 50 episodes of the original Blue's channel with keen interest.
Eric has Blue...you might as well have Baby Blue. The good thing is Baby Blue is not only a pry bar...but also a chisel/driver. Gotta luv multi-purpose tools.
A massive amount of head gasket failures come from every manufacturer using *'torque to yield' bolts* which are *a fancy name for sub-grade 3 bolts with super premium prices.*
Years ago I when I went to college for tech trades the machining lab I was in got a hold of some TTY bolts the auto tech labs had and wanted to know what made them so special.
The short story is that when we did the standard torsion, tensile and hardness yield tests on them they were in the same range as standard cheapo Grade 3 hardware!
Because of that to this day whenever I do head work on any modern engine I put in high-grade bolts torqued to 10% over spec and I have never had a head gasket blow out on an engine a second time no matter how hard they were abused.
Interesting, thanks for the info!
I HATE CORPORATE BEAN COUNTERS
i didnt know that was a thing- torque to yield sounds like you start on the wrong side of the curve with a cold engine and any extra stress goes farther down the wrong side towards plasticland
Do you use grade 8 bolts or just some ARP stuff?
@@giggiddy Depends on the application. For warmed-up stock I feel grade 8 or metric 10.9 (~150,000 PSI tensile) is huge step up from TTY (~65,000 PSI tensile) as is.
What is ARP now, 260 - 280,000 PSI? I can't afford to drive stuff that would need that strong of head bolts! 😳🤑😅
Top notch entertainment as usual. Keep up the good work sir!
Much appreciated!
That’s some neat battery wiring, I’ve done a few. Nice touch to locate the battery on the opposite side to the driver, on very light cars like this such tiny details makes enough of a difference to matter.
Of course, by moving the battery to the rear you’ve now made the front even lighter, possibly upsetting the handling balance of this finely tuned motor car. I’d offset that by putting on a few pounds. The things we do for our cars 💁🏻♂️😅
Watching from New Zealand 🇳🇿
i cant even imaging what its like living there
such a beautiful looking area
@@danhard8440beautiful place to live, where are you watching from? 🙏🙌
@@reneetekanawa-hughes215 Minneapolis Minnesota USA under a mile from where the George Floyd incident was🤣
A kiwi watching from Alberta, Canada
Can't wait till next week to find out what's going on with the engine!
Thanks so much!... The engine is out of the car again and I'm digging into it right now.
Ayyyyyye let Sunday Cantina and Coffee commence!
Hope you had a good week, Jimbo!
Uh oh you already said something about disastrous. This should be interesting.
Nice Blue reference. I always wonder how much overlap there is between the TH-camrs I follow. Robot Cantina, South Main Auto, Watch Wes Work, I Do Cars, and Vice Grip Garage are staples of my automotive viewing.
he also watches sleeper dude channel
out of your list i only watch this one and Ido cars I personally cant stand VGG
@@danhard8440 Yeah, his "content" regularly shows up in the sidebar for me. As much as I say Not Interested or whatever, it keeps coming.
I tried to like VGG but he waffles and drags on about stuff, says annoying words instead of the correct ones, and doesn't seem to learn from lessons he likes to preach.
@@Mis73rRand0m You can only say things like "Sparkolators" so many times before it's time to turn the Channel. Catering to a certain low-tier demographic that just eats that stuff up...
Thanks Jimbo, Always love your technical and comedic skills
i love opening my phone to a notification from you uploading a new video. you inspired me to do a twin carb setup on my 624cc kohler vtwin, going to try start it up tomorrow hopefully it goes well!. keep up the good work!
Haha I love your imperial and metric conversions. The Miata to MX-5 exchange was very funny
I didn't think anyone would catch that. Well done!
Oh yeah, I didn't catch it because they are synonyms in my brain and tickle the exact same wrinkle.
"the oil will exit the engine with authority" : )
on an engine with that many hours, it could have been the increasing the lash on the exhaust valve to increase the cylinder pressure coupled with the weak starter that did the gasket in, doubtful the camshaft mod itself did it though, likely just defective head gasket, or one that was already stressed from the previous abuse, as you said, simple fix, root causation however is another story, love the project Jimbo, stay safe out there buddy
when I was younger I made a carb balancer with some clear tubing and 2 stroke oil.
I set my Ducati that way😂😂😂
That is interesting! Looking forward to finding out what is causing the excessive blow-by!
I bet that car is a blast to drive. I see the S10 has made it outside to the driveway. The wall of hay was fantastic.
I drove the S10 the other day. That truck has been a nightmare to resurrect.
I think it's now throwing tons of oil out the new windows in the cam.
Are the cam journals pressure fed ?
If you have unintentionally opened up a new oil path through the cam, it will also now have significantly less oil pressure in the crank 😮
I think you will need to plug the ends of the cam to stop the oil flowing through the centre.
Remember when checking "blowby" at the cap on this, it's swinging two big pistons around at nearly the same time. It will move a lot of air.
Cylinder leakage test should show a blown gasket, but I think if you had a gasket gone that bad, it wouldn't run so well.
As always, thanks for another great video. A Sunday roast, then settle down to watch this. From 🏴 🇬🇧 with love. 😊
When he took the balls out, the first thought that crossed my mind was, "you need to seal those holes!"
I don't know, but I think that that there is no pressurized oil feed into the internal camshaft, all those holes with bits inside them get lubricated by splash lubrication, not a pressure feed as far as I can tell reviewing the camshaft section of the video.
Well done!
Thank you.
I look forward to your videos each Sunday.
Have a great day. Sir.
Thanks Jimbo for some really great automotive adventures!
I literally have a small vise grip permanently mounted to a slide hammer for those kind of extraction jobs. Works fantastic on shaft keys and roll pins just like that
I have made four of those. Different vicegrip jaw shapes. Used them for years regularly.👍👍👍
Love love watching your videos. Thanks for the awesome content 🫡💪🏼
Glad you like them!
Welp. All you had to do to heavily disable the compression relief was put a weld between the crown of the limiting pin and the gear to block the crescent from fully retracting at low rpm _or_ add a little centripetal weight to the crescent. I'd trust a little weld closer to the center more. I suspect you're going to find MORE problems than the one you had.
I remember the Renault Dauphine ads from the early 60s. It looks like you may get that Predator up to 60s performance standards. The oil problem looks like something similar I found on a Koehler lawnmower engine. That turned out to be a blown head gasket.
Loved the reference to Blue. I'm amazed how small the engine / car community is on the internet considering how large of an impact engines / cars have on our culture!
I greatly appreciate the cleverly placed microwave beeps. Gone are the days of the half moon thingy I wonder how the Renault would do with the engine from my lawnmower, a Briggs and Stratton 870cc 27hp v twin (Bad Boy 60") Cafe Bustello makes oil? TYPICAL JIMMY TO THE LAST "DOINK". I was expecting the beep 😢
It's got to be caused by removing the compression relief contraption. Those holes left by the balls in the cam maybe. All I know is that car is the coolest thing I ever saw! Keep it coming!!!!
Hopefully there's no malice in the combustion palace.
Love how you showed coffee right after showing motor oil. Also a shaft and two balls lol.
Jimbo's videos bring joy to my heart 😊
I just spent this morning hauling hay over in New mexico. It's for ease of loading helps the stacker get the stacks of bales straight to load them on the trucks.
Hey Jimbo, another good one for Sunday from you!
Cheers 👍💪✌
Thanks!
Keep up the good work Jimbo.😊
I was totally gonna suggest modifying the decompression with a weaker spring lol! glad I waited. and yes, V-twin noises are the best
I was waiting for Uncle Rodney to come knocking on the ride home!
Thanks so much! Indeed it was a close call. I think the engine spit out is last drop of oil when I pulled up to the shop
lol. love the greenscreened hand.
thanks for the great video jimbo
This is such a fun series to watch. Thanks for the great content always!
Aww Jim. I wanted a cup from the beginning! Is it on the way to me? I can wish! Great video!
Someday we will think about selling them.
It's blue's baby brother! Nice "I do cars" reference !!!!
Instead of gauges to balance the carburetors you can use some plastic hose with some 2-stroke oil in a U on a piece of wood, tuning the balance will be relatively easy that way and if you get a bad imbalance then all you get is some squirts of 2-stroke oil entering the cylinder.
Cheap and you can throw it away or burn it after you are done.
Love a few good vroom vrooms from the little car. Best of luck with the gasket. Just changed one on a lawn mower a couple weeks ago. Those darn Inteks.
Right on!
I always enjoy your videos, and the constant confirmation of the old adage that if you fix something with motors or cars that will provoke something ELSE to go wrong LOL LOL
Thanks for entertaining the MASSES Jimbo!
Excellent channel . Look forward to every videp 👍🏼
JB .............thanks for your hard work !!!! ..........we enjoy it .
I like it that we're back to working on the Renault and getting nuts and bolts technical. I was surprised by your reference to Blue, funny how the circles intersect on TH-cam, but maybe call it "baby blue"? then again maybe not.
love the reference to one of my favorite TH-camrs and good old "blue"
I'm here for jimbo boost the algorithm!!
The compression relief valve I saw on a Bultaco dirt bike in the 70s was inbetween the sparkplug and the head and was operated by a cable and lever on the handlebars.
I remember those...you could make obnoxious noises when riding.
Some heads had two spark plug holes, ...same thread size as the compression release.
First thought through my brain when you gutted the the compression relief assembly was "fill that in with epoxy, seal that mutha UP." Guaranteed that's the source of your oil fountain.
I always liked your videos, but now they are better. Timing has helped the humor. Better editing & keeping up the pace with enough explanation , but not too much. Even the soundtrack was different and fit in.
Well... I have a Briggs and Stratton Vanguard motor with a blown head gasket, that you just helped me diagnose 😅
Great video, I'm another fan of "I do cars" and Ole blue.
I really do love this little car. It's got so much attitude for what it is. LOL
👍👍👍👍🙏😊 that engine is so high performance it need a ‘Catch can’……. Next you’ll be rapping the exhaust pipe and putting in ‘coil overs’ (I don’t know what I’m talking about) (but I enjoy your channel 😂)
Be interesting to see what happened to the little twin. Thanks for the videos.
Right on, jimbo ... and my guess would be that cam were it now has nothing blocking them holes the balls and shaft were in , its causing exhaust gasses to escape into the casing and pop ... jusy a guess .. love the content boss , keep kicking butt 😅... peace and love brotha, keep it rad, stay safe, and build on..l8r famz and keep having fun
Where would those gasses come from though? The exhaust gasses should be tightly kept in the cylinder, not sneaking by the valve stems into the cam case. Blowing anything with force through the cam shaft or its lobes would first require that the cam case is under pressure, which it shouldn't be during normal operation, unless I'm forgetting something.
The battery mod looks real good.