Weighing The Wildcat 223 Piston & EC Billet Rod For The "Big Bore" 179cc to 208cc LCT Engine Build!
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- เผยแพร่เมื่อ 23 ส.ค. 2022
- This is some of the build process I will not include in the upcoming Part 2 of the LCT 179cc into a 208cc "Big Bore" engine build video series. I'm uploading this video of weighing the parts to determine which parts to use that will help maintain the engine balance on the LCT engine. This is mainly for those building the same 179cc LCT engine into the "Big Bore" configuration so I'm not uploading with notification as it will only be of interest to those building the same 179cc LCT engine. I will list the detailed weights of specific parts used for this engine build in the description below for those that may want them.
LCT 65mm Flat Top Piston with rings: 149.3 grams
LCT Wrist Pin: 46.4 grams
Total weight LCT Piston W/rings & Pin: 195.7 grams
Wildcat 223 Flat Top Piston with rings: 152.7 grams
Wildcat 223 Wrist Pin: 41.4 grams
Total Weight Wildcat Piston W/rings & Pin 194.1 grams
LCT MARS Connecting Rod: 141.9 grams
EC # 8281 Forged Rod W/bearing : 147.1 grams
EC # Rod 8281 W/ Wildcat Piston Combo: 341.2 grams
LCT Mars Rod W/ LCT Piston Combo: 337.6 grams
Difference in grams between these: 3.6 grams
Compression ratio calculator: www.mpsracing.com/Pages/race_...
Cylinder head CC : 20 or 22? (sorry, I don't have a cc kit)
Bore Size & Piston : 70mm Flat top
Stroke: 54mm
Deck Height: .017 below deck
Head Gasket: .012 Steel Shim (70mm bore size)
CR with 20cc head: around 9.4:1
CR with 22cc head: around 10:1
The EC Forged Rod and Wildcat 223 Piston combo is 3.6 grams heavier than the stock LCT piston and rod. It is close enough to run as is. I may lighten the piston or remove some weight from the crankshaft to keep everything at or below the weight of the stock LCT configuration. The reason I'm trying to stay close to the stock LCT weight on the piston and rod is because these engines have a good balance out of the box. I'd like to stay close to where it was or just a bit lighter.
A quick note about the LCT 208cc engine block: My block seemed to be clearanced for a billet rod from the factory. The EC Billet Rod has no issues with clearance in this block. This is gonna be an easy engine build!
The 179cc LCT engine uses a Honda taper flywheel, any flywheel with the Honda/clone taper should fit.
I purchased a cast aluminum flywheel online for this project. These are not billet but they are spin rated and tested at 8500 RPM. That's more than I'll need for this one. I paid $39.95 for my flywheel but I ordered it along with several other items to reduce the shipping costs. I have seen them on the Bay place for $59.95. Just keep in mind the shipping fees if you decide to go this route. Of course a billet flywheel would be a better choice and they do cost a bit more. For this engine combination the 8500 RPM flywheel will be more than enough as this one will keep the stock camshaft. Also this will be a low budget build and experimental engine combination.
Piston: I'm using the Wildcat 223 flat top in this build. I prefer the Wildcat 223 flat top piston due to their reduced weight. That lighter weight is extremely important to maintain the balance of the engine.
More Info about the Connecting Rod: The rod I'm using will be the EC part# 8281 rod with insert bearing. This is a long rod combo and the rod measures at 3.353" in length. (about .050 longer than stock) This rod paired with the Wildcat 223 flat top piston sits at just under .017 below deck in the LCT 208cc engine block. That's perfect for the .012 thick steel shim head gasket that came with the 179cc LCT engine. This should leave a quench distance of .029! (not .027) Ordinarily with a stock crankshaft I'd probably not get any closer than .035 on the quench distance but the little LCT engine has a forged steel crankshaft! That stiff crank with a 54mm stroke will allow me to feel comfortable with a .029 quench (or squish). There should be much less flex with the LCT crankshaft as compared to a cast crank.
If any of you Guys watching are Kart Racers, be sure to check out
@franksoutdoorlife Great Kart racing and coverage!
@peterchristlieb has a new 236cc, MoFlow billet head build on his channel! Awesome stuff! Be sure to check it out!
For those interested in a 79cc or 99cc build @fatbuddycat has a current build on his channel now. Lots of great info on building the 79cc and 99cc engines! Latest 99cc with a PZ19 video link: • Wicked Little Mini Bik...
@DIYWilly has a 224 build going now as well!
Where can you find the LCT 179cc $49.95 engine?
These are available at Surplus Center in Lincoln Nebraska. They have a website at:
www.surpluscenter.com/
Surplus Center also has a store at the Bay place named "burdensales". The shipping is cheaper.
I'm not sponsored or affiliated with Surplus Center or EC Carburetors
#budgetbuild
#enginebuild
#lct - แนวปฏิบัติและการใช้ชีวิต
Amazing Chris! i didn't realize there was so much aftermarket stuff out there for these motors!
Lots of performance parts available for the Honda clone and Predator engines. The only bad part is the billet rod costs more than the little LCT engine! 🤣🤣🤣
I love these videos!!
The little LCT engines have turned out to be a lot of fun! Thanks JFF!
Great video lots of Info I've been doing foundation work on the new house and getting everything move in ready before winter hits
Thanks HP! Get that house ready! It's no fun working on that stuff after Winter arrives! Brrrrr
I'm interested in seeing what you have planned for the head!
Nothing exotic like big valves for this one. I've already spent more than I should have for this "experiment"! 🤣
@@KentuckyFriedFixes port and polish?
@@igokarts4510 Oh man, that would be a long "Part 2" video. I won't include the head work footage, but I will definitely include 1 performance "trick" in "Part 2".
I love it! Numbers get easier with understanding the engines and how they work. I like figuring out what they were shooting for from the factory. If you have the compression spec you can basically look at how they achieved it in relation to the actual bore.
Thanks FBC! I think you left this comment while I was watching your new 99cc build video! Great stuff man I'm linking to that!
@@KentuckyFriedFixes i tried a breakdown video but it was waaaaay too long. I'm not as knowledgeable and it would be great if you did a comparison and/or breakdown video. With enough attention maybe we can sway ARC to produce some rods for them. Mini Bikes even when I was a kid were making it happen with 3 and 5hp engines. It would be really cool to bring that back.
@@fatbuddycat I'm with you. I'd love to see some interest in the smaller engines. There needs to be a billet rod for the little engines. With the right parts a guy could build a fire breather!
@@KentuckyFriedFixes release the brappings!!
🤦♂️ argh! WHY ? You had to go and bring numbers into a perfectly good build vid! Now I have a headache 🤕 😳 .. 😂😂 …. ✌️🤙
LOL! This one won't be in the build video. It's just the rundown on the parts weights to have handy for those that are building a 179cc LCT. Thanks Rawb I appreciate you. 🤣
That looks like a good setup...looks like you could take 10-12 off the deck...lol
I'd love to have that piston at "0" deck or maybe just a bit above! I think I've already blown the budget on this build though! 🤣🤣
to bad we live so far apart b/c this tiller wood look great in your wife collection
LOL! She's allergic to operating anything without a comfortable seat. 🤣🤣🤣
That came out nice. Did you figure what CR you will have?
Depending on the chamber size of the head, if the head is 22cc it will come out close to 9.4:1, if it's 20cc it should be closer to 10:1 with the .012 steel shim head gasket. The only issue is I'm having to keep the stock camshaft with this one, but we will add a 1.3 rocker to the intake valve. I'll try to put the specs info in the description. I really need to buy or make a cc kit for these heads!
Less rotating mass is always better
I like to keep everything on a diet, except me. 🤣🤣
@@KentuckyFriedFixes 😂😂🤣
Just curious, I have a fairly built 224, and when I changed the flywheel to billit I thought it maybe seemed like you could feel the power stroke more than I could with the stock flywheel. I'm assuming a heavier flywheel would carry more rotating speed through all the strokes, or at least more consistent speed. Have you ever noticed a change in the way it feels at lower rpm? Hopefully this makes sense hahaha
Hi Brian! You've got it. That makes perfect sense. The lighter flywheel will not smooth out the engine as much as a heavier flywheel. Light flywheels are tough on rod bearings too. The heavier the flywheel, the smoother the engine will run at low RPM. The heavy flywheel stores more energy because it has more density, this allows the rotating mass to rely on the energy stored in the heavy flywheel to keep the engine turning in addition to the power coming from the power stroke of the engine. Unfortunately though, a heavy flywheel slows the acceleration and deceleration of the engine. So depending on the application a light flywheel could be good thing or bad. This is one of my favorite subjects and I could go on for days about flywheels but I won't. Thanks man!
@@KentuckyFriedFixes I swear you should be getting paid for this hahaha. The Mr Pete of mini bikes. Thanks I was hoping it wasn't just in my head
hi my question is about b/s built i got a 4hp and i see more then i want i just want see a c/s 3/4 but i see a cam pulley is this a easy fix thank you
Hi Kevin! If you have an extended shaft coming thru the side cover from the cam it's likely you have a tiller engine. No problem at all. You can change cams or saw off the excess. I'd recommend changing the camshaft as there is some demand for those extended tiller camshafts on the bay place. It operates the "reverse" feature on some garden tillers and they don't make those anymore. You could probably get enough $ out of the stock cam to buy a performance camshaft for it!
Hi Chris, I'd be honored if you'd look at my EC 236 and MoFlow1 review video and shoot me some feedback. Its up now.
Love it Frosty! Linking to it now my friend!
I have a 208. Is it worth building? The last motor I built was on the 90's, 5 HP Briggs. What parts don't interchange. Cam?
Hi Mackelby1! I like the little LCT engines. The 208 block has the same issue as the 179 block. The camshaft diameter at .569 is larger than the Honda clone .549 and Predator 212 non-hemi .559 diameter cams. The only drawback IMO is having to get a camshaft custom ground. There are work arounds of course by simply adding higher ratio rocker arms and a few more tricks. The crankshaft in the LCT engines is much nicer than you'll find in others too. Don't be afraid to build what you have. If nothing else at least the crankshaft will swap into a more camshaft friendly block and side cover as well. My thoughts on the LCT engines is what's the worst that can happen? If it blows and you ruin the block, oh well. 🤣 Better than sitting under a table gathering dust.
@@KentuckyFriedFixes thanks for responding
There discontinued 291 has a 58mm crankshaft. Really curious if it fits. Those cranks might be cheap if it's discontinued.
@@mackelby1 I'd like to get a look at one. Now you've got me curious about it too!
@@KentuckyFriedFixes I hate to be that sad SOB that can't wait for you to try it so I can find out. Don't hold that against me please! Where do you get your LCT parts from?