Crucial Roostertail 35 Piston Port Engine Kit

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MonsterAir said:
What are the rules? That motor would make an fg 2wd fly!
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No rules for the platform. Small bore is 39cc under and big bore is 40cc+ I've never been a fan of the fg platform. They are light but not attractive to me. Lol. The marder is aight but I've heard it's a real pita to install anything bigger than a 30.5 in an fg.
 
So the TR billet case wouldn't work without mods and I talked with Damo and he said I shouldn't use it because he sent me the correct gaskets to get the squish right using the stock case. He also said he preferred the cooling capacity of the stock case compared to the billet type. 20230122_182159.jpg
Pieces went together flawlessly using the stock case.
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Lightened flywheel
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Rooster intake
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Using the primal drag clutch with DDM 9500 spring
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So I bought a KM roller for $375 just for this build. Added a few upgrades. Blackbone trans gears, primal 3-piece trans case, blackbone 2-speed, bonehead carbon pieces, uber rc ball drive cups and axles and some Taylor rc must haves.
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Damn ufc bells suck. Have to grind to allow gears to go on and the threads were messed up. Had to retap.
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Almost done.
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Seandonato73 said:
Did they do any testing to prove it? Thats a 4 stroke principal that doesn't have fuel going through a crankcase to vaporize the fuel before going into the combustion chamber.
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Supposedly. I hit up Damo to confirm. Gonna find out very soon. If it's a turd I'll let everyone know.
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Added a used Olimat pipe, bebop wheelie bar, and highflow fuel kit. All finished and ready to run 🏃‍♂️
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No, there are many ideas of how to get more or airflow, make it rougher or smooth it out. There was an snake oil salesman years ago that was pushing dimples in intake tracts and combustion chambers. He claimed it helped with airflow, emissions and carbon build up. Little proof it ds anything, other then flow marginally more air in a naturally inducted system. About pointless on a forced induction system, anything with direct injection and mostly worthless with port injection. Seen lots of other crazy designs over the years as well. The tornado insert thing was pretty comical as well. Let's spin the air and make it more turbulent when the injectors atomize fuel better then any carb could hope to.
Really in two strokes were just worried about getting more air and the proper amount of fuel into the crankcase. The atomized fuel flashes to a vapor in the crankcase.
 
Seandonato73 said:
No, there are many ideas of how to get more or airflow, make it rougher or smooth it out. There was an snake oil salesman years ago that was pushing dimples in intake tracts and combustion chambers. He claimed it helped with airflow, emissions and carbon build up. Little proof it ds anything, other then flow marginally more air in a naturally inducted system. About pointless on a forced induction system, anything with direct injection and mostly worthless with port injection. Seen lots of other crazy designs over the years as well. The tornado insert thing was pretty comical as well. Let's spin the air and make it more turbulent when the injectors atomize fuel better then any carb could hope to.
Really in two strokes were just worried about getting more air and the proper amount of fuel into the crankcase. The atomized fuel flashes to a vapor in the crankcase.
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So you think smooth or rough would be no difference in power delivery? Then it's just the roostertail design if it can't hurt performance.
 
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crucialRC said:
So you think smooth or rough would be no difference in power delivery? Then it's just the roossstertail design if it can't hurt performance.
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No I don't think it will hurt anything, I'm just doubting the effort is helping much. It's like the golf ball. The dimples help reduce drag through the air, and the air flows over the surface faster because if that. For whatever reason it doesn't work the same in engines. I'm assuming it's a similar principal he's applying here. Make a bunch of air dams/pockets where air gets hung up, but the air moving over the top has reduced drag because of the pockets of trapped air. So the incoming air should move faster. Idk how much it would increase the air speed over a traditional v-stack. Only way to quantify it is on a dyno, flow bench, or computer modeling.
 
Update on this. I've been putting this around for about 3 weekends. I have about 3 tanks of rich break-in fuel thru this thing and about to change up to my race fuel. Power seems ok and I'm anxious to see how it acts off break-in fuel and full throttle.

I had an issue with the 2 speed. The layshaft bolt backed out and ate the 1way bearing. I noticed the plastic spacer was trash also so I installed a Metts Modz brass spacer and new KingMotor 1way set. Hopefully I can get out a little this weekend to test. 20230306_140157.jpg20230306_140226.jpg20230306_140307.jpg20230306_140603.jpg20230306_140630.jpg20230306_142339.jpg20230306_142400.jpg
 
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