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Old 05-09-2004, 02:16 PM
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whats a NASCAR motor?

Whats the difference between a mid-race motor and a full out nascar motor? I've heard a few people say "Im running a NASCAR motor". Just wondering what all they change or do different?

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Sean

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Old 05-09-2004, 02:24 PM
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And they are probably "full of it".........................Nascar motors are designed and built to last the length of the race weekend, and thats about it.

The average guy isn't going to get one, unless he has more money than brains............................
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Old 05-09-2004, 02:25 PM
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yeah so how are they designed and built to last the length of the race weekend? Also, if you drive it like a daily driver how long do you think it will last?
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Old 05-09-2004, 02:28 PM
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Not long, they are specially clearenced etc.........if I knew how to build one, I wouldn't be giving out "bad" advise on here......lol
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Old 05-09-2004, 02:41 PM
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One of the things that limits reliability is that the pistons have almost no skirts on them. Pretty crazy!
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Old 05-09-2004, 03:19 PM
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This is the funniest thing I`ve heard in a while "i`m running a nascar motor" nascar little league maybe. As said, there endurance engines, made to last for the 500 mile or less race at RPM ranges over 6000, since that`s where they make there power, they use thin piston rings that are not made to endure everyday street driving, there made for continuous high RPM use and not low RPM torque a street engine requires.
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Old 05-09-2004, 03:26 PM
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http://auto.howstuffworks.com/question588.htm
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Old 05-09-2004, 04:56 PM
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whats a NASCAR motor? hell, there all kinds of levels of NASCAR racing from claimer & crate motor engines, & spec engines up to all out Cup engines. technically a person with an LS1 from a camaro could say hes got a nascar engine. Nascar has a class that uses spec engines like the LS1
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Old 05-11-2004, 05:28 PM
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What makes NASCAR engines different from the engines in street cars?
Try the site.
http://auto.howstuffworks.com/question588.htm
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Old 06-03-2004, 06:32 PM
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A NASCAR engine for the big leagues, the NEXTEL cup, will cost something near $100,000 dollars. Makes it very unlikely that anyone will have one in a street car. The block is a special casting, not like a stock Ford, Chevy or Mopar, except in the bore spacing, and probably the main bearing diameters, but not necessarily. The crank is also special, very light, and very expensive. The engines run for 400, 500, up to 600 miles at over 9,000 rpm, and can approach 10,000. The carburetors cost $1,100, and don't idle well, have no cold start provisions, and aren't easily tuned to meet emissions standards! The engines are built with 12.5 to 1 compression, which makes gas expensive and hard to find at the local station. There are other differences, too, in oiling, cooling, exhaust, ignition...
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Old 06-03-2004, 07:26 PM
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dont forget the cup and bush series run on leaded gas... kinda hard to find these days.
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Old 06-03-2004, 08:47 PM
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Another thing to consider is that Nextel Cup engines are built for each track.Next time somebody tells you they have aCup engine,ask them which track it was built for.If I'm not mistaken,the crank,block and heads for a Cup engine have to come from factory stock,but they do a lot of work on them before they hit the track.
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Old 06-04-2004, 12:06 PM
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Not to jump on the band wagon of laughs and slams but most racing caliber motors of that type run an external oil pump that require a tank to hold the oil (these systems are referred to as dry sump systems) and a special pan. Most Cup engine blocks have been machined to hell in order to maximize these systems which results in big $$ even for used stuff. They have more money in to oiling then most people have in to there entire engine. This is the most extreme situation and who ever said this to you might not have meant a Cup engine. Present day Cup cylinder head will not work on a bolt together 350 Chevy for example without major part upgrades such as piston designs and lifter configurations either, plus all the other short life stuff others mentioned in this thread. However to stick up for the person that mentioned the original comment to you and the gentlemen that mentioned the stock LS1 motors (which I think is used in ARCA), it's very possible that old 23 deg headed Chevy stuff has trickled in to this persons hands and he considers it a NASCAR motor?? Technically he'd be telling the truth. I hope this over bloated post helps...

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Old 06-07-2004, 05:04 PM
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About 3 years ago, Southern Rods of Greer, SC, a mail order street rod vendor and rod builder had a then Winston Cup motor in the showroom for sale. It was supposedly from Sterling Marlin's #4 Kodak Chevy, The most recognizable item was a huge Holly Double Pumper, but the spec sheet said that was not the Cup carb. The external plumbing for both oil and coolant was a rats nest. The motor itself looked as though it had been a faithful gladiator and was ready for a new and less strenuous home. My old memory is getting bad, but an $18,000 price tag is lingering there. My thoughts at the time was I would not have that piece of junk in my car, even if they were willing to give it to me as well as install for free.

Trees
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Old 06-08-2004, 08:15 AM
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well mabe they are not full of it, they could have bought it here: www.musclemotorsports.com (if you find the engines they also list a build sheet, and you can check and see the differences yourself)
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