one of my only complaints with my b16a1 is how loud it is around 3100 rpms(~2800-3200)! this is right were it is at 60mph (Y1 tranny) and i drive 60mph most of the time. need less to say it gets annoying and hard on the ears. i was just wondering if this was normal or if something is wrong with my engine.

 

well at least ur not at 4000 RPM at 60.. .. at 3000 im at 50 its not that loud.. compared to the 240 w/ a full exhaust.. but more loud than the stock miata..

 

actually i would rather be a 4000. its only loud right at 3100 give or take 200.

 

and after the car is warm and it idles at 800 it is also loud there too. when i say loud it is like a really low loud sound, almost like you have subwolfer turned up. any input?

 

bump, need some input

 

earplugs?

 

do you have an exhaust leak?

 

silencer? stock axle back? give it to me.. personally like th 3 chose

 

Whats your exhaust setup?
What mounts do you have?
Do you have an aftermarket intake?
Is your sound-deadening material stripped off?

I know that my CRX is louder at certain RPMs, but I think thats because of the stiff AZRace mounts and it just transfers a lot of vibration into the cabin. I put a stock airbox back on and it quieted it down a bit.

Anyways, all of those things can contribute to it.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Mr_CRX &raquo;</TD></TR><TR><TD CLASS="quote">

I know that my CRX is louder at certain RPMs, but I think thats because of the stiff AZRace mounts and it just transfers a lot of vibration into the cabin. I put a stock airbox back on and it quieted it down a bit.

Anyways, all of those things can contribute to it. </TD></TR></TABLE>

i know that with my B18 the vibration of the hasport mounts and engine sounds like bass. actually i cant even see out of my mirrors at certain RPM's and i have a cold air intake so it is really noisy. but i love every second of it.

 

Haha, yeah. Same here. I actually never noticed how bad the vibration was until I rode in my friends DA teg w/ stock mounts. I was like "wow, this is really quiet and smooth for an ls-vtec"

But when that pedal hits the floor, it makes it worth every minute that I have to sit at a red light listening to that hum/vibration.

 

whoa i just noticed your avatar Mr_CRX; i have the same exact cover

 

i have stock b16 header with 2 1/4 piping, 17" resonator and dynomax superturbo
hasport mounts
ram air intake (hot air intake what ever you wanna call it)
i have sound deadning vynal in the hatch.

 

...blown peice of the exhaust system. Sometimes something broken in the exhaust causes odd resonating sound that may not be the familiar "rattle." That may cause the low frequence noise you hear.

This may sound silly but get a good sized wrench and when the car is making that low frequency at 800RPMs... tap on the different parts of the exhaust with the wrench. You may be able to cause a cancellation frequency and you may be able to locate the problem.

If you have a big fart can on the end of your pipe and it was ebay'd, or something, those aren't tested for bad resonating frequencies. That's why when you hear a cheap "universal $90" muffler accelerate you get the low WAHHHHH then it dies out around 2.5-4... and then a rattling roar at the top. A good exhaust will have a solid bandwidth through the muffler because they're tested to do so.

 

so most likely somethink is wrong with my exhaust system? the only thing that original is the b16 header. i had new piping, resonator and muffler put on after swap (4 months ago). i notice aroung the header gasket on block that it look like something wet is seeping out, could this be the problem or is it more likely to be more under the car? any ideas?

 

did you change the header gasket?

 

no i didn't. it looks like it needs to be though. i just didn't think it was that urgent. could this be my problem?

 

bump for more info/ideas

 

My b16 isnt loud at those rpm's at all. but sorry i dont have any input on what the problem could be

 

thanks for the input though, at least your telling me its not normal.

 

i noticed today that it starts getting loud at about 2800 and then peaks at about 3200. once i get to 3400 it is nice and queit. how can this be?

 

bump

 

could just be the frequency of those rpms happen to vibrate the metal and chassis and etc. to the point where it seems really loud to your ears.Sounds kinda scientific but could be very true.........

 

You drive 60??? most of the time???? City Streets are 35-50. highway is 65+. heres an idea. bump up ur speed a little bit. Dont hover around 60 if it anoys you so much. I had to drive my brothers integra once, on the highway, DEFNENTLY not a fun or Cruising ride. All the way from Miami. WOO! but what I do like, I dont have to down shift.

 

country roads are 55. when driving 55-60 is when its loud. if i drive like 63 then its queit but then you are more than 5 mph over the speed limit and that when you get pulled over, and i can't get any tickets. well i don't think i can get a much quieter exhaust so i guess i need to check for a leak or get another resonator, and i don't know that another resonator will do anything.