torpedolfm

I have a 95 maxima se. After I hit 80 mph, the engine gets alot louder and deeper and i can really hear it spinning compared to when I'm driving about 40 mph and I can barely even hear the engine. Im not sure if this is normal or what. Maybe it is just the cold weather up here. If anyone knows anything about this please let me know.


Thanks

96BLUMAX

iTrader: (3)

Well is your car stock?

njmaxseltd

iTrader: (19)

Right about 80 is when I hear my engine start to roar a bit.

Sounds great! Whats your problem?

hardknox

I just completed a round trip of about 2600 miles (TX to FL and back) and my cruise was set at 80-85 pretty much the entire time I was on I-10. The entire trip took just over 34 hours including stops to hit the bathrooms and eat.

I have a 98 GXE (stock except for wheels and rubber) and it seemed a bit noisier at 80 but nothing like a roar. Mostly a little extra wind noise around the mirrors.

I think 80 is a very comfortable speed for this car - I know from personal experience it will go much faster.

AssyrianRacer

I have a 99 GLE. I drive at around 80 all the time, its the best feeling in the world. I like to play bunny with other cars at that speed.



My engine doesnt roar unless I floor it, best feeling. I was flying down the I90 the other day, I floored it and got up to 120 in no time.
It wasnt even that lowd, but a bit lowder then at arond 40mph. get your stuf cheked out man.

Shift_ Then Floor It

torpedolfm

yes the car is totally stock

robocop199

iTrader: (1)

Are you auto or stick? If you're a stick it might be because at around 80 you're up around 3200-3300RPMs and the engine is working harder.

Stephen Max

iTrader: (59)

Power required to overcome air resistance is proportional to the velocity cubed. At 80 mph you need eight times as much power as when you drive at 40 mph. That is one reason why engines are louder at higher speeds. Another reason is higher rpm at higher speeds.

njmaxseltd

iTrader: (19)

Lime

You beat me to a similar post.

The RPM at 80 makes more noise than the RPM at 40. Take a peek at your tacometer at these speeds, next time you think of it.

MacGyver265

Sorry, the Air Resistance is proportional to the Velocity SQUARED, not cubed. So to go twice the speed would require FOUR times the power, not eight.

here's a NASA link to prove it: http://www.grc.nasa.gov/WWW/K-12/airplane/falling.html

Stephen Max

iTrader: (59)

Think again. Yes, force is proportional to velocity squared. Power is force times velocity. Hence power is proportional to velocity cubed.

Good website, by the way.

HotMax28

the car is a stick.....i was thinking about it all day and i thought it should sound louder but there's like a big difference before 80 mph and at 80 and up. anyways thanks for all your help, if anyone else has any other ideas let me know

96BLUMAX

iTrader: (3)

Well since its stock you wont hear your car breathing until around that speed. If you had an intake then it would be that loud all the time.