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  #16 (permalink)  
Old 10-05-2008, 09:29 AM
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Thanks for the help guys. I understand what you are saying......I also agree about the marine apps. being THE hardest......

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  #17 (permalink)  
Old 10-06-2008, 08:39 AM
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Dirt track racing is harder than pulling for the exact same reason as marine, tires unload when hitting ruts sending rpm to the moon, then instantantly load back up when the tire grabs traction. this is happening several times per lap and with the newer 4 bar setups you are constantly on the gas and hooked up exept for bumps.Competitive engines in hobby stocks and emods around here are pulling 650 hp in hobby stock to 720 emod hobbys turn about 7200 to 8000 rpm depending on size 355 up to 434.Mods are turning upwards of 9000 rpm for competitive engines nowdays.Every body is running the engines on the backside of the power curve in order to keep hooked up.
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Old 10-07-2008, 02:10 AM
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Race for race, the dirt track sees the harder use.

Mile for mile, the truck pulling engine is beat on much more.

A dirt track race might be 50-100 miles of mixed throttle. A pull is 1/12 of a mile at full throttle and insanely heavy loading.

Think of it this way. To simulate a truck pull in a dirt track environment, hitch a 15,000 lb trailer on a skid behind an outlaw car. See how it does after 30 laps at full throttle.
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Old 10-07-2008, 07:20 AM
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It wouldn't need to go 30 laps only 200 feet.Basicaly a truck pull is like a dyno run,full throttle load it up and pull it down just like on a pump.Now the rest of the drive line is a different story it really takes a beating.
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Old 10-07-2008, 07:31 AM
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I don't think there's really any questioning that a skid pull is harder than a roundy round. Oval track cars have a much lower output per displacement rating- mostly due to large amounts of boost that are used in pulls.

That being said each is very different and requires its own semi-specialized parts for what they endure.
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