I'm confused. . .454CC = .28CI
06-03-2009, 08:30 AM
#1
I'm confused. . .454CC = .28CI
I had always thought the Losi 454 is a .28 Engine. But I've seen people calling it a .27 Engine. But then I heard that if it's a 454 7 port then it's a .27 Engine. A 454 8 port is a .28 Engine. Can anyone shed some light on this or is this something that can be argued into infinity.
This is what I had thought these engines were:
traxxas 2.5=.18
traxxas 3.3=.20
O.S. 3.4=.21
mach 426=.26
mach 427=.26
mach 454=.28
Anyone wanna help me figure this out?
Thanks.
This is what I had thought these engines were:
traxxas 2.5=.18
traxxas 3.3=.20
O.S. 3.4=.21
mach 426=.26
mach 427=.26
mach 454=.28
Anyone wanna help me figure this out?
Thanks.
06-03-2009, 09:40 AM
#2
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RE: I'm confused. . .454CC = .28CI
Losi likes useing it's own numbers, (& Ports have Nothing to do with displacement...The M26SS is a 3 Port & the 427 is a 7 Poet & they're both .26's)
Mach 427 w/PS SG = 4.27cc displacement Mach .26 w/PS SG = 4.26 cc displacement
Mach .28 with PS SG = 4.57 cc displacement
Losi 454 Engine,
Overview
The Losi 454 engine is a potent .28-sized performance engine. Specifically built for 1/8-scale off-road vehicles, the 454 engine offers a large cooling head for cooler and more reliable operation.
The large-bore carburetor design provides ample intake capacity, creating the kind of powerful throttle response and acceleration you want for any track or terrain. Additionally, fine-tuning the 454 for any temperature or weather condition is simple thanks to the easy-to-adjust high- and low-speed needles.
Specs
- Displacement:.28 cu in
- Bore:0.728 in (18.50mm)
- Stroke:0.669 in (17.00mm)
- Engine (Only) Weight:0.859 lb (390 g)
- RPM Range:36,000
- # of Ports:8
- Carb Type:Two-Needle Slide Aluminum/Steel
- Crank Type:High-Carbon Steel, Precision ground and polished with "Turbo Grooves"[/list]
06-03-2009, 11:04 AM
#3
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RE: I'm confused. . .454CC = .28CI
Just to elaborate a little further of what Sugafree said, the only factors that affect engine displacement is the bore, stroke, and number of cylinders. Compression, ports, supercharging, etc can affect power, but not change the physical displacement.
The mathematical formula for figuring out any piston engine's size is bore x bore x stroke x number of cylinders x .7854 (.7854 = pi divided by 4). Plug in the numbers for the 454 that Sugafree gave and you have .728 x .728 x .669 x 1 x .7854 = .278. Round it off and you have .28. Convert .278 to cubic centimeters and you get 4.555. 454 just sounds better though.
The mathematical formula for figuring out any piston engine's size is bore x bore x stroke x number of cylinders x .7854 (.7854 = pi divided by 4). Plug in the numbers for the 454 that Sugafree gave and you have .728 x .728 x .669 x 1 x .7854 = .278. Round it off and you have .28. Convert .278 to cubic centimeters and you get 4.555. 454 just sounds better though.
06-03-2009, 01:15 PM
#4
RE: I'm confused. . .454CC = .28CI
Ok. That makes sense from both you gents. When willclark did the numbers I had a guy that wasn't roundingthe number, .278to the nearest tens and said it was a .27. but Iknew I was right but of course humbled myself and said nothing.
Thanks to both of you.
Thanks to both of you.
