NSX question about engine noise

[wctsao]

Hi,

I test drove a used NSX yesterday and it made a whine/whistle sound as the car accelerated. Is this normal?

thanks,
William Tsao

 

[nsxtasy]

No, that's not normal for a stock NSX. However, it may be normal for an NSX that has been modified, particularly with an aftermarket intake and/or any type of forced induction like a supercharger or turbocharger.

 

[Nsxotic]

Exactly, I'll bet big money that it had a cone style aftermarket intake.

 

[DDozier]

I have a K&N Drop in filter in the stock box and I get a whine or hissing sound at 3500 RPM. The sound is not there on the stock filter.

 

[nsxhk]

Could it be the alternator noise coming from the speakers? Was the whinning noise there when the stereo is off?

 

[wctsao]

I checked on the web to find out some other reasons for the problem. I apologize in advance if it doesn't make sense.

Could a bad diode in the alternator cause the engine to whine? Would replacing the alternator fix the problem and how much does one run for on an NSX?

If the differential fluid is low, would you also get a whine? Will adding more differential fluid fix the problem or is the whine a sign that its already too late?

 

[Russ]

Originally posted by wctsao:
Hi,

I test drove a used NSX yesterday and it made a whine/whistle sound as the car accelerated. Is this normal?

thanks,
William Tsao

Gear noise? Which year NSX is it?

------------------
Russ
'91 black/black

 

[nsxtasy]

Another possibility (if it sounds like gear noise) is aftermarket gears - particularly the R&P (ring and pinion).

A stock NSX should not have noticeable gear noise.

 

[wctsao]

Actually, it could have been gear noise. I've never driven one in the past so I'm not sure how loud its suppose to be. Is there a way to reduce the gear noise (adding additives?)

The car is a 97 NSX-T.

 

[nsxtasy]

Were you told about any aftermarket modifications on the car?

 

[wctsao]

I think the car was all stock. I plan on test driving another 97 NSX-T tomorrow and compare against the one I drove before.