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Old 08-18-2012, 05:57 PM   #36
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Re: Custom tuneing not void warranty?

The driveshaft rotates after the transmission. So it's actually rotating faster as the car's speed increases, different from RPMs. If the driveshaft was in the same position as the flywheel, your assessment would be correct. However, like a wheel rotates, say, 20 times per second at 3k rpms in first gear. At 3k rpm in sixth gear is turning 100 times per second. The driveshaft keeps rotating exponentially faster as well.
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Old 08-18-2012, 06:17 PM   #37
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Quote:
Originally Posted by Sanguin
The driveshaft rotates after the transmission. So it's actually rotating faster as the car's speed increases, different from RPMs. If the driveshaft was in the same position as the flywheel, your assessment would be correct. However, like a wheel rotates, say, 20 times per second at 3k rpms in first gear. At 3k rpm in sixth gear is turning 100 times per second at 3k rpms in 6th gear. The driveshaft keeps rotating exponentially faster as well.
Meaning that at 135 your driveshaft is rotating pretty damn fast!
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Old 08-18-2012, 06:26 PM   #38
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Quote:
Originally Posted by GrabberBlue5.0

What are you trying to say? That made no sense.

I know what rpms stands for... That was not a question. I also know that the driveshaft rotates... That also was not a question. Vehicle speed, as in how fast the car is moving, is not the same thing as engine speed, or rpms, which is the rate at which the engine rotates the crankshaft and everything between the 2. The only thing I am unsure of is the amount of stress on the driveshaft trying to rotate the gears in the differential created by the gear in the transmission.

So again, not sure what you're saying.
I was saying that rotations per minute could be semi applied to the driveshaft. Since it is rotating. Duh. (emoticons would help coney the way I'm speaking) the driveshaft from my basic mechanical knowledge is a hunk of rotating metal that connects the power from the transmission to the rear end and the gears inside it. Depending on the rpms is how fast the driveshaft also spins. And at 135 mph you can run any rpm.(governor is off) maybe this is why the v6 can only go 125@ 3k rpm. To prevent the snapping and injury. I'm here to learn. Teach me people. It is going to my minor
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Old 08-18-2012, 07:47 PM   #39
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Ah, as you can see I know little about transmissions lol. Not the first time I've been wrong
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Old 08-18-2012, 09:47 PM   #40
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Re: Custom tuneing not void warranty?

I've dealt with cars for about 10 years now on almost a daily basis and have one ASE certification. I know quite a bit about most modern gasoline powered vehicles. Diesels and carbs; I only know a portion of their specifics.

I still don't know how they add boost to these cars without adding a map sensor. I guess they just adjust A/F ratio compared to rpm and throttle and that's it. I'm used to people replacing 1 bar map sensors with 2 bars so the PCM can see boost.

---------- Post added at 10:47 PM ---------- Previous post was at 10:41 PM ----------

Quote:
Originally Posted by Whitelightning View Post
I was saying that rotations per minute could be semi applied to the driveshaft. Since it is rotating. Duh. (emoticons would help coney the way I'm speaking) the driveshaft from my basic mechanical knowledge is a hunk of rotating metal that connects the power from the transmission to the rear end and the gears inside it. Depending on the rpms is how fast the driveshaft also spins. And at 135 mph you can run any rpm.(governor is off) maybe this is why the v6 can only go 125@ 3k rpm. To prevent the snapping and injury. I'm here to learn. Teach me people. It is going to my minor
Unfortunately ours isn't just a hunk of metal. It's a 2 piece with a CV joint on the rear. Some part of it can't withstand the centrifugal force at those rotational speeds, then I'd guess like a tire out of balance, it vibrates and the harmonics just eat it apart. If it was just a standard driveshaft with two u-joints, it'd be close to indestructible. Since I don't even know where the infamous "135 driveshaft explosion" came apart at, I don't even know where the weak link is. I bet it's the rear CV joint.
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Old 08-18-2012, 09:49 PM   #41
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Re: Custom tuneing not void warranty?

This is a good reason to get a one piece drive shaft.



Enough said?
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Old 08-18-2012, 11:42 PM   #42
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That's the only video we have. I've seen it too many times. Anyone else wanna try?
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Old 08-19-2012, 07:06 AM   #43
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I'm on my phone rite now but there's a vid of a guys d shaft blowing up at 162 on a dyno
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Old 08-19-2012, 12:27 PM   #44
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Re: Custom tuneing not void warranty?

Dyno's don't count. We already know what causes that, not the same as a street run.
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Old 08-19-2012, 12:40 PM   #45
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Quote:
Originally Posted by Sanguin
Dyno's don't count. We already know what causes that, not the same as a street run.
True
But better age than sorry
Ive saved up enough and will probably get the driveshaft in 2 weeks
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