Straight pipes
 

Hello,

I got these custom straight pipes which delete the mufflers and it gets extremely loud above about 4k rpm to the point i hear parts of the car vibrating.
I'm running stock cats and everything else.

I was wondering if this is normal or might damage something from the extreme vibrations. Also do these straight pipes increase back pressure and reduce torque or hp somehow?


Thanks,

Lol no you'll be fine. And they wouldn't increase pressure, they'd decrease it. Back pressure is kind of a myth. Exhausts have more to do with scavenging and a muffler delete will not help nor hurt it.

Lol whoops I meant decrease back pressure, but does that vibration thing happen to all cbe with loud noise or is it just my ghetto thing? Cause I'm thinking of getting a cbe or top speed axle back but if it's the same thing might as well keep mine.

Thanks for the help


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Just a nissan thing. It's just a cheap Japanese car spot welded together. Things rattle. A CBE will have a bigger/better mid pipe and X or Y or H pipe. Sound and rattle won't change much unless you buy a reall quite CBE.

So basically the louder it is the more rattle it'll have for the most part?

Mine does have lots of vibrations from the inside which i thought was not normal since its my first car mod, but now i know its normal

Thanks a lot man !

Not exactly. Too much flow when the engine isn't drawing in enough air /or there is too much valve timing (typically, at lower RPMS) to match the exhaust will slow down the exhaust pulses.

But anyway, yeah, the VQ37HR sounds like a tractor without cleverly placed resonators.

You can add resonators strategically to minimize the noise -- there's a thread on this floating around.

Not really. A loud cbe can still have good flow. Loud and crapy flow with have rasp, drone, vibrate etc.

I see, thanks !


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