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Rat Motor

Old Jul 9, 2007 | 11:16 AM
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Default Rat Motor

I tried the "Search". No luck. Can someone tell me why a 454 is called "Rat" motor and are all 454's "Rat" motors?
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Old Jul 9, 2007 | 11:33 AM
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Rat=Big Block
Mouse=Small Block
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Old Jul 9, 2007 | 12:10 PM
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Originally Posted by Redshark6974
Rat=Big Block
Mouse=Small Block
That's all there is to it? I thought there would be more to it than that. A special cam or heads or something to that effect.
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Old Jul 9, 2007 | 12:32 PM
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That's all there is to it. I'd like to know where these names came from. Presumably there's a good story there.
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Old Jul 9, 2007 | 12:37 PM
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Maybe because the SBC is as ubiquitous as those furry little menaces? I dunno.
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Old Jul 9, 2007 | 12:54 PM
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From the following website:

http://www.geocities.com/MotorCity/D...ssary.html#rat

Rat, Rat Motor: Big Block Chevrolet engines 366, 396, 402, 427, and 454. These engines were called this due to the staggered patterned of the valves, which stuck up at different angles like the quills of a porcupine.

Mouse, Mouse Motor: The nickname for the small block Chevrolet engine, named such because the big block was called a "Rat" and so the small engine must be a "mouse".
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Old Jul 9, 2007 | 04:47 PM
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Actually in the Dec/Jan 1971 issue of CORVETTE NEWS on page 28,29 there is a two page ad showing a complete 350 engine and a complete 454 engine. The captions reads... THE 350 (mouse motors) VS. THE 454 (rat motors). There is a wedge of cheese in front with bite taken out of it. The first paragraph reads.....

"Mouse motors" and "rat motors"? They're the affectionate terms the enthusiast publications use- small block engines are "mouse motors", large cubes are "rat motors".

It's a great GM ad.
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Old Jul 10, 2007 | 09:22 AM
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Rats are big and Mice are small. The analogy is drawn to the respective engine sizes.

Small Block= Mouse
Big Block= Rat.

The plate on my 68 427 reads "RAT.427". I am forever trying to explain to people what the plate means
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Old Jul 10, 2007 | 11:18 AM
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I still to this day use the respective terms. Old habits die hard. There was an old ad, I think for the old Z-28s, that used the old cartoon figure 'Mighty Mouse' for advertising. I've went back to my old magazines but I can't find the ad. AH, back in the day!
John
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Old Jul 10, 2007 | 12:42 PM
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Originally Posted by capevettes
Rats are big and Mice are small. The analogy is drawn to the respective engine sizes.

Small Block= Mouse
Big Block= Rat.

The plate on my 68 427 reads "RAT.427". I am forever trying to explain to people what the plate means
I know what you mean. My personalized tag on my 68 427 roadster was "RUG RAT" - I loved it like a child.
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Old Jul 11, 2007 | 08:20 AM
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It is said that when the Chevy SB came out & was taken to the drag strip, they called it a mouse motor. When it won, they called it Mighty Mouse. The Mighty is understood.

The BBC was therefore called a rat, i.e. a big mouse.

The Complete CHEVROLET Book by Petersen Publishing Co.
"And, believe it or not, 20 years of Ford dominance in the American youth market melted away almost overnight. The kids started buying
V-8 Chevys en masse as early as the spring of 1955."

"And the rest is history. Within weeks the new V-8 Chevys were moping up their stock classes on the drag strips- and running away from the Fords and Olds 88's at the stoplights."


Even much later I had an interesting reaction. After shutting down everyone in Galveston (they did not know me there ) w/ my cousin riding, she said she had to see the engine. She was accustomed to fast cars, drove fast, had a boyfriend w/ a modified GTO, etc. She was shocked at the small size of Mighty Mouse. Later ran a Mighty Rat in the other Hot Rod.
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