Cars In General - Questions and Discussion

  • Thread starter Thread starter TuneRVisioN
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land sea air
Maybe the sound of the increased volume of air? what sort of scraping?
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It sounds like 50 pens scratching a chalkboard repeatedly. It scares me... :nervous::scared: It also kind of sounds like 50 shovels scraping the ground when shoveling snow. It's hard to explain, but I'm sure you get the point.
 
I have always thought of that sound as someting verry bad. A mustqang i saw once sunded like that, and i wondered if it was broken. Maybe its a broken piston or crankshaft connection.
 
TuneRVisioN
What causes cars to make some scraping sound from thier engines from medium to high RPM's? I hear it all the time. (Nope, none of the cars I drive make this creepy sound... :nervous: )
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An improperly maintained and/or poorly designed variable valve timing system?
 
TuneRVisioN
Mustangs and other cars have VVT-i?
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The Mustang's Modular 4.6L V8 does not have VVT, yet, but apparently Ford is working on it. Over at GM you can find VVT on a good number of the new truck V8s, as well as the majority of their V6 line these days as well. As for Chrysler, they aren't doing much with it... I believe some of the V6 models, and the V10 in the Viper are the only engines with it.

...Oh, and we don't have the 'i' (intelligence) on ours. Pretty much just a basic setup. What would you expect from an American company?
 
The vipers V10 has it??? learn something new everyday. I thought some versions of fords modular v8 had a basic vvt system
 
Ohh thanks for the replies. But I guess no one knows exactly what that scraping sound is... It comes from alot of cars, from Inline 4's through turbo diesel engines.

EDIT: Also does anyone knows the stock ratios for a 2004 Clio V6? I want them so bad and searching didn't help...
 
TuneRVisioN
Ohh thanks for the replies. But I guess no one knows exactly what that scraping sound is... It comes from alot of cars, from Inline 4's through turbo diesel engines.
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I don't even know what your are talking about, scraping noise..??....?... I never here a scraping noise unless you have a street sign lodged under the car.

Can you find a video on streetfire or youtube making the sound you are talking about?
 
land sea air
The vipers V10 has it??? learn something new everyday. I thought some versions of fords modular v8 had a basic vvt system
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The 2007 Viper is the first to get it, the new heads are giving the car an extra 90 BHP, up to 600 BHP with the new setup.

...On the modular V8, you are right. I had forgotten that Ford added a VVT-like setup on the 5.4L and 4.6L in 2004/2005, on the Falcon, F-150 (and SUVs), and the obvious Mustang. Ooops. I don't follow Ford all that well, so my apologies...

GM is just starting to stick VVT-technology in their V8s, starting with the Vortec L76 6.0L V8 (not to be confused with the LS-series L76 in the Commodore/G8), as well as the L92 6.2L V8.

The LS7 was originally meant to have a 3V head with VVT, but plans were scrapped late in development...
 
...I think only the Supercharged models do, I don't think the "standard" 4.6L models have it. My guess is that the "Ultra" class engines will have it when those debut in the near-future...
 
It sounds like a squeaky scrapeing sound. The higher the RPM, the more rapidly it scrapes something... Another different type of scraping sound from some other cars sounds are like uhh... I can't explain it. It's just a high pitched scrape. And my final question in this thread. How to post images on this site?
 
I'm sure theres something inside the engine doing this, but it's not a valve tap. I hear it usually from cars from 2002 and back.

EDIT: I changed the title, hopefully this thread gets stickied. AND HOW TO POST PICS??
 
TuneRVisioN
I'm sure theres something inside the engine doing this, but it's not a valve tap. I hear it usually from cars from 2002 and back.
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I still don't know what this 'scraping' sound you refer to.


TuneRVisioN
AND HOW TO POST PICS??
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picseg7.jpg


Use the 'inset image' icon and that will give you a prompt to place a link to the picture (Red square). If you quote my post you will see the image tags used.

If you need to upload first you can use imageshack, that will spawn a imageshack page where you will get your link (Green square)

Otherwise you can just upload a attachment to GTPlanet in your post Blue square)
 
Now why isn't no one using this thread to ask questions? They rather start a whole new thread instead of using this thread? Also sorry for taking so long Viper, but thanks. People please use this thread if you have any questions about cars and can't be arsed for searching.

Now on topic. I have a theory. A car can't have HP with out Torque, or Torque without HP. This is because when a car hits 5250RPM, The HP and Torque numbers will be exactly the same. This means it would have 0 HP and 0Lb Ft of Torque up to 5250RPM. :scared: Am I right?

I don't know if it would have HP or Torque past 5250RPM though... It still needs both, not just HP or just Torque right?
 
Having more horsepower doesn't mean you have to have more torque, for example, F1 engines use extremely lightweight and highly balanced components to spin very fast and create loads of horsepower, but since the engines are so small there is a very low proportion of torque to the large amount of power created.
 
TuneRVisioN
I have a theory. A car can't have HP with out Torque, or Torque without HP.
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That's no theory. That's fact.

Horsepower as we know it is basically a function of torque over time. It's entirely dependent on the existence of torque. At the same time, any exertion of torque that can be measured and timed can be given a horsepower measurement -- for example, if it takes you 6 seconds to turn a bolt 360 degrees using 30lbs. of force on a 1ft.-long wrench, you're producing about .0571 horsepower.

It's all in the formula.
 
Wolfe
That's no theory. That's fact.

Horsepower as we know it is basically a function of torque over time. It's entirely dependent on the existence of torque. At the same time, any exertion of torque that can be measured and timed can be given a horsepower measurement -- for example, if it takes you 6 seconds to turn a bolt 360 degrees using 30lbs. of force on a 1ft.-long wrench, you're producing about .0571 horsepower.

It's all in the formula.
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Pfft... brainiac. :lol: I will look up this formula online that you are talking about. Unless you will be nice enough to post it here for everyone. I will also see what makes this LOUD whining sound that sounds sort of like a supercharger. Maybe it has to do with the turbo. I notice that it only whines when in mid-high range RPM's, the same exact time when the turbo kicks in and starts hissing. Maybe it's a serious maintenance problem. I will check this out, but it sounds so nice. I might miss this sound after I find out how to fix the problem, then fix it. Maybe the turbo is real old that it starts whining. Yes I'm talking about a turbo diesel engine and a diesel engine car. The car is the Mercedes 190, but I don't know which model. It has like 25 spoke rims and a somewhat small wing at the back. I will search this model too. But I hope that whining sound doesn't mean that the car is dying. :scared: NOOOO!!!! Oil changes didn't affect the sound either. :grumpy:

Wonder if I can find out this problem, and also this scraping sound that no one knows about except me. It is like a loud squeaky scraping sound, that you can hear all the time when you are in NYC, since no one likes to take care of thier cars here.

I never made a post so long. Now to pat myself on the back. :D
 
Oops... :lol: How can I forget what was posted in this thread? Thanks for reminding me.

I still haven't found out what makes these sounds, but I'm starting to have an idea...

I think it means that the turbo is getting worn out. (If that's possible.) The screaming whining sound is just as loud as the engine. :scared: I really wan't to see if anyone else knows this. Searching did not help at all. Only if I had some camcorder or something to record it's sound. Same goes for that scraping sound no one knows... It sounds like a whine sound you hear when you are driving a supercharged car in Need For Speed Carbon. I'm giving as many hints as I could possibly give using only text. :(
 
Wolfe
Horsepower as we know it is basically a function of torque over time. It's entirely dependent on the existence of torque. At the same time, any exertion of torque that can be measured and timed can be given a horsepower measurement --
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:irked:

Wolfe
Power as we know it is basically a function of torque over time. It's entirely dependent on the existence of torque. At the same time, any exertion of torque that can be measured and timed can be given a power measurement --
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👍

Horsepower is a unit of power, like watts or British Thermal Units per hour.
 
Actually, Wolfe hit it, Torque is the driving force behind any power. It is how the Transmission portrays power throughout the whole system that enables the engine to drive a car. Without torque you would have no turning force in the drivetrain. Look up and see how power is put through a system in a car.
 
Original Equipment Manufacturer. Its the factory/company that builds the parts in the first place, after which said parts are then distributed to various stores or shops for private sale.
 
How do you install the actual Misfire System in a AWD? I remember reading it from a website that it is a turbo restrictor of some sort. Am I wrong?
 

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