Jamie Muffett
Region: US
Wednesday 24 December 2025 15:21:57 GMT
179652
4051
198
184
Music
Download
Comments
Matt Fredrikson :
I don’t know why anyone is shocked, they haven’t been allowed to touch their engines for years. Do we think they haven’t been working on theoretical systems for years and years?
2025-12-24 18:20:05
294
TurboCamry :
All of it screams reliability issues
2025-12-25 08:26:47
167
Rich from Redseven :
I actually know the answer to this and I’m outside of any nda’s. 1) they’ve thinned the valve face right down so it flexes like a drum skin. 2) filled the hollow valve with a material that expands, pushed the valve face outwards into the combustion chamber and reduces chamber volume. They already did hollow filled valves before, but now they are using the filling as a medium to expand and push and bow outwards against the thinned valve face
2025-12-25 14:43:13
161
Victor 🇨🇦🇪🇺🇬🇱🇺🇦 :
A 2 piece "piston within a piston" having a type of phase change material sandwiched between the 2 parts so the top of the piston dome telescopes out could do the trick.
2025-12-24 21:32:10
66
Brian :
If the cylinder material expanded with heat it would make the ID larger, not smaller.
2025-12-25 10:49:05
17
Andrew Jackson :
Dimpled cylinder walls are the high hp secrets
2025-12-26 09:34:06
12
dave sterl :
VCR (variable compression ratio) engines have existed for decades. Many manufacturers have experimented tho the only production vcr is in the infinity qx50 made by Nissan. An additional linkage from crank to con rod.
2025-12-24 17:45:50
11
csepregiistvan :
Or just use the nitrous trick. Calibrated ringgap, that allows higher blowby when cold and closes when heated.
2025-12-25 09:59:53
7
tacocat0153 :
Does that mean that after every race, the chamber would be deformed and unusable again? Assuming it would harden at the deformed size after the race.
2025-12-24 19:48:42
5
Jafeth Alba :
Dome? A Hemi??? Hell yeah brother
2025-12-25 00:23:55
5
philadelphia1021 :
These engine regs were written a while ago and you’d think all the teams would have noticed right away the change of the compression ratio only at ambient temps every team should have spotted this loophole right away. The complaints are only coming out now
2025-12-25 03:22:40
4
Someone :
it's going to be in the pre combustion chamber
2025-12-24 16:10:26
3
Dew :
My theory it’s the crankshaft length expanding with heat, letting the piston be lower and higher depending the part of the stroke it is, which will increase the compression ratio.
2025-12-25 06:46:48
3
Myles Tyler :
The old wax in the cylinders trick.🤭
2025-12-30 02:25:29
2
Nick :
Seems like growing the rods is the simplest
2026-01-05 05:35:57
2
Karthik :
My question is why does this only work for Mercedes or Redbull, why can’t other teams do the same thing?
2025-12-26 01:52:47
2
MC Bay :
We've had variable compression for years. Look up VCR.
2025-12-26 02:31:02
2
checho :
the walls of the combustion chamber cannot become narrower, if they do, the piston would not be able to pass all the way up
2025-12-25 01:21:32
2
waynegaarder3 :
rod stretch drag racers moving to aluminum rods have to factor in that so they don't have valve interference
2025-12-26 06:45:09
2
Kye :
Clearly they just have a very small sorcerer casting “enlarge” & “reduce” on the piston
2025-12-25 00:37:42
2
Uncle D's :
They don't change it dynamically. The engine tolerances are loose when at ambient temp. As the engine gets to operational temps the tolerances tighten and increases the compression. It is all about the rules allowing for compression check at ambient temp, they should change the rule to check it at operational temps.
2026-01-24 02:03:15
2
biggestjollibeefan :
Solids don't expand in that way. If you took a donut shape and heated it, the inner hole would get bigger in diameter by a factor proportional to coeff. of thermal expansion. Think about scalar factors in geometry
2025-12-26 14:44:58
2
Adonis_maximus :
way back when guys used to add wax to the top of the pistons so they could get through inspections with the set displacement. as soon as it warmed up the wax would melt and blow out the exhaust. but what if Mercedes used a bimetallic piston dome in the same way
2026-02-06 13:34:14
2
Luc🏎️🐎 :
If you have a material that flex’s when hot couldn’t it warp when exposed to prolonged over heating?
2025-12-24 15:49:17
2
Liquidwombat :
Having the connecting rod expand, wouldn’t help because it would also reduce the volume at bottom, dead center, having the crank expand would probably be the most effective because it would reduce volume at top dead center and increase volume at bottom dead center, but seems like it would be the most difficult to accomplish reliably. The simplest seems to be having material somewhere near the head of the piston that expands.
2025-12-26 14:00:30
1
To see more videos from user @jamiemuffett, please go to the Tikwm
homepage.
