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: https://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 Bike "Hisun 99 Mee...  

‪@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:
https://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