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nascrap and the 20 car cheating
I’m getting real tired of people who know nothing about performance engines HARPING about this.
Let me explain in a way most people can understand.
The connecting rod was light by 2.7 grams.
2.7 grams is about the weight of one dime
A racing engine rotating assembly is balanced to tolerances of +or- .02 grams it is preferred to have .00grams +or- . plus the balance engine parts are piston,wrist pin,rings and circlips plus .8 grams for oil.
NASCAR picks one connecting rod out of 1 engine per manufacture at random the 20 car just happened to be that car.
TO HAVE A BALANCED ENGINE EVERY ROD MUST WEIGH THE SAME!!
So if one rod was light they all were for a total of 21.7 grams letting the engine reach high revolutions faster that is not counting the pistons, rings and piston wrist pin's
Views: 1781
Replies to This Discussion
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Permalink Reply by timothy price on
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rule reads
top three cars plus one car from each manufacturer get tore down
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Permalink Reply by Slanted66 on
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I understand the light rod did not help engine performance (maybe even hurt it). However, the rule is 525...not 525 or so. Mistake or not, the rule is cut and dried...no gray area. The penality seems excessive, but what would be a more fitting punishnent??
Ona side note, why do they even have underweight rods around anyway? Seems strange to have an illegal part in the shop...
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manufactuerer quality control should make sure rods are the same
in the years past if you hot tanked a set of rod's and found 1 or 2 that were pink those were the light ones that were dipped in a substance to hake then the right weight.
if you bought a set of pink rod's they were prefered because they were all the same weight and ( usually shot peened )
to make them stronger
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In 1996 I took collage courses on building engines and learned a lot more than I knew at the time about racing engines
actually I needed to build a new engine and just had my shop burn down so I needed a clean place to build the engine plus I did have great naps during lectures (a lot of the stuff they taught I already knew ) so at all worked out great I even helped teach the class the next year
Engine I built was a mechanical injected 358 cid Chevy that broke the dyno at about 710 hp on gas also the racecar
set a record at Bonneville salt flats that year
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Permalink Reply by GTX - HEMI on
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Tim..............what year was that and what car or streamliner did the motor go into.
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was a 1953 studebaker and set record at 228mph and change in oct 1996
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Trust me the Carrillo rods and Venoliea pistons were all the same as each other when the engine was built
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Permalink Reply by Mike Kenyon on
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Timothy I understand.I promise the assembles on this tote are within 2/10's of a gram assembled.
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Permalink Reply by Vlad Rogers on
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Matter doesn't lose mass unless it turns into energy E=MC^2. Since I doubt there was a nuclear reaction in the engine, what happened? It either was lite ahead of time, or some of the mass chipped away during the race (the later seems unlikely).
You mentioned that a lite connecting rod would shake the engine apart, so could that 2.7 grams have been somewhere else in the same mechanism to balance it out?
And no, I don't know racing engines, but I know physics.
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Permalink Reply by Dave Horwath on
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I don't know physics, but common sense says a professional racing engine manufacturer wouldn't let that rod slip through the cracks being that it's kinda an important part! Call me a cynical, but didn't TRW & Triad have engine issues early on? Busch & Kenseth in the Daytona 500 (they lost 4 engines in total), Busch & Hamlin in the Fresh Fit 500...is it related, odds are yes...IMHO
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So Dave, you said Toyota wouldn't let that slip through the cracks, but then you said its odd that they blew so many engines. In your opinion, what happened?
I'd like Timothy To reply, I don't think I read what he thinks yet.
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