Damage Engine If Use Silencer?

[Nosure]

Hi everyone, i have full exhaust system, HKS dump and front pipe, trust 94mm catback, it is just too loud for everyday drive. my car made 340KW on 1.45bar, 280KW on 1bar, if I use silencer and low boost, drive it hard, will it damage the engine (maybe too much back pressure)?? i can hear the noise of air resistance when full boost (1bar) over 5k or 6k rpm.

I tried many exhaust shop, only 2 option to quiet my exhaust: 1 is change a small system, 2 is put the silencer in.

anyone give some idea??? i don't want damage the engine by using a silencer:(

thanks!

[TiTAN]

option 3, change the mufflers in the system so it isnt as loud.

[Nosure]

option 3, change the mufflers in the system so it isnt as loud.

no room for a mid muffler:( replace the rear one? not much different:(

i think if put a silencer is ok, nothing damage the engine, i will just put the silencer in. cheap and easy.

[R31Nismoid]

There is always room for a mid muffler. I know plenty of GTR's with dual mufflers.

One before, one after the diff... hell that's how it came factory!

You can fit one in, it's just a matter of finding a decent exhaust place that is willing to do it.

Or sell the Trust exhaust and have another one made. Either way it'll work out around the same price.

If you put a silencer in, you are effectively making the exhaust what, 2" maybe less? (depending on outlet size).

If you then intend to even ATTEMPT to put your foot down you are going to do some severe overall damage without question.

That much backpressure with turbo's that flow that much is never going to end pretty

Im with Titan - fix it properly.

[Tangles]

use a couple of magnaflow resonators between the cat-converter and the rear muffler

also, Id suggest replacing the muffler if the resonators dont help.

a resonator in my system helped remove some drone

- simply 3" dump, gutted cat, magnaflow 3"resonator, kakimoto 3" straight through GTR racing muffler

definately more room in mine to add another muffler and/or resonator

[Nosure]

There is always room for a mid muffler. I know plenty of GTR's with dual mufflers.

One before, one after the diff... hell that's how it came factory!

You can fit one in, it's just a matter of finding a decent exhaust place that is willing to do it.

Or sell the Trust exhaust and have another one made. Either way it'll work out around the same price.

If you put a silencer in, you are effectively making the exhaust what, 2" maybe less? (depending on outlet size).

If you then intend to even ATTEMPT to put your foot down you are going to do some severe overall damage without question.

That much backpressure with turbo's that flow that much is never going to end pretty

Im with Titan - fix it properly.

OK thanks mate

so will it have some engine knock show on the PFC? or it will damage the engine without any sign?

if i put the silencer and drive normally, maybe a few foot down? is that ok?

[Rav3nNZ]

OK thanks mate

so will it have some engine knock show on the PFC? or it will damage the engine without any sign?

if i put the silencer and drive normally, maybe a few foot down? is that ok?

Dude just take the silencer out of the equation! i noticed a pretty big performance decrease in my old GTT when i put a silencer in an that had a standard turbo!

Plus it sounded shit.

Have you tried breathing through a straw? try blowing as hard as you can an see how you feel

[Nosure]

OK cool. any good flow catback system good for 600HP+??? some idea please.

I'm not really understand, is that big back pressure really damage the engine? or just turbo??

[Nosure]

does the PFC will show some high knock, if backpressure is big enough to damage the engine or turbo?

[R31Nismoid]

It's not about "how many times can i put the foot down with a restrictor", its as simple as do not do it

The motor & turbo will be destroyed if you attempt to plant your foot down.

Think about it. The turbos are spinning hard to produce the boost, and then hitting restriction becasue it cannot get it all out.

So literally as the others have said... use a straw...

1. Suck in through your nose fast as possible.

2. Blow out through the straw fast as possible.

Now the trick here is, you have to blow it out as fast as you sucked it in. Not going to happen now is it?

You'll blow your bl00dy eyeballs out before you get it out at the same rate as it went in. So imagine what'll happen to the motor - much the same effect.

3" exhaust is to small, forget that. You need a 3.5" - 4".

Get one custom made, any decent exhaust or performance place will be able to do it.

My twin 2.5" --> merge --> 3.5" exhaust is ~ 90-91dB. Borderline legal depending on the time of day basically.

You can have performance, and you can have a quiet exhaust.

[R31Nismoid]

does the PFC will show some high knock, if backpressure is big enough to damage the engine or turbo?

I wont answer that because it sounds like you want to "try" it and just "watch" for knock. Which is extremely silly.

Engine detonation isn't the be all and end all mate.

For the sake of the converstation - with a restrictor in - DO NOT EVEN COME ONTO BOOST.

That clear enough?

[r33_racer]

Bam! Stickin it to him Ash...

New exhaust ftw mate, just do it properly.

[Nosure]

I wont answer that because it sounds like you want to "try" it and just "watch" for knock. Which is extremely silly.

Engine detonation isn't the be all and end all mate.

For the sake of the converstation - with a restrictor in - DO NOT EVEN COME ONTO BOOST.

That clear enough?

yeah clear enough!

the fact is i have foot down a few times with silencer, the knock is 20 max which is ok. but i can feel the power is like shit. is there any chance of engine damage by a few full boost?(about 10 times total?) hope no damage:(

mate what 3.5 catback you got?? thanks!

Edited March 31, 2010 by Nosure

[NYTSKY]

I use a silencer in mine when i need to drive the car on the street. I take it out for late night cruises

With it in i never go over 10psi or rev the engine out.

If you need it everyday just get the exhaust sorted properly.

[Nosure]

I use a silencer in mine when i need to drive the car on the street. I take it out for late night cruises

With it in i never go over 10psi or rev the engine out.

If you need it everyday just get the exhaust sorted properly.

yeah mate, but some time its hard to control my right foot:) most skyliner should understand it. haha

[TiTAN]

mate what 3.5 catback you got?? thanks!

his exhaust is custom made, not an off the shelf item.

[Tangles]

weld in a mid-muffler

problem solved

[DECIM8]

Silencer is totally fine, it will restrict flow LESS than the standard exhaust. It will change the grab point on the clutch and how much rpm etc you have to use. It will feel strange.

IMO get a varex exhaust, weld a different pipe one the engine and grind off the label. Remote controlled. Otherwise buy my ECV.

P.S dont worry you can rev the shit off it with no issues.

Edited March 31, 2010 by DECIM8

[Nosure]

Silencer is totally fine, it will restrict flow LESS than the standard exhaust. It will change the grab point on the clutch and how much rpm etc you have to use. It will feel strange.

IMO get a varex exhaust, weld a different pipe one the engine and grind off the label. Remote controlled. Otherwise buy my ECV.

P.S dont worry you can rev the shit off it with no issues.

yeah, sure its strange. EVC is only 80mm, but my pipe is 94mm:(

HOHO,do you mean rev it with a silencer? but the huge back pressure will make some damage??

[PM-R33]

Do what i did. Get a varex put in underneath the car on flanges, then get a straight 3" pipe made on flanges and switch between the two depending on what you want to do with the car.

That way you have:

Super loud - straight 3"

Loud - Varex open

Silent - Varex closed

Bit of a pain, but gets the best of both worlds.