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Cup car sounds

PRB

PRB

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Was watching qualifying. They showed Harvick's car as it slowed after his qualifying run, and it had an interesting high pitched whistle component. At first I thought it was mechanical, like those transmissions they have that whine at low gear settings. But then they were interviewing Biffle when Harvick's car came down pit road, and it didn't sound so much mechanical. Sounded cool, whatever it was.
 
do they (nascar) allow gear drive timing ?....rather than the chains?..the geared timing setups whine too
 
Daveroo said:
do they (nascar) allow gear drive timing ?....rather than the chains?..the geared timing setups whine too
Click to expand...

They use timing belts as ist gives them better adjustability. I don't see how but thats what they say.
 
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