LS1, Full exhaust system, raspy as hell???

[vz57ssz]

I just fitted a complete system on my VZ LS1

Pacmaker Tri-y's, 200 cell metallic high flow cats and a pex twin 2.5 cat back (front mufflers only)

I am impressed with the extra pickup, idle and sound it makes under 3000rpm, though once you get above 3000 it is pretty damn raspy sounding.
It sounds alright almost like a V8 Supercar, however I don't like the Raspy sound it makes, but I like the volume it produces so would adding a rear muffler remove the raspy sound or would I need a new cat back?.

Before installing the complete system it had a single 3inch with front muffler which sounded ok, though when u got over 3000rpm on that system it sounded stock, I have also been told that the LS1 is a pretty raspy sounding engine and its hard to get it sounding right, is this true?

Thanks

[whitels1ss]

Sounds like you should fit a rear resonator buddy

[vz57ssz]

Can I get one from any exhaust shop, and how much quieter would it be?

[whitels1ss]

Some of the off the shelf systems are available with rear sections with or without resonators, if available you might be able
to just buy a rear section to suit with resonator, some muffler shops would be able to weld resonator into your system,
but it is the old "how long is a piece of string?" thing as to if the price is worthwhile otherwise perhaps another cat back
system could be the go and sell off your old one.
Yes rear resonators make a big change to the sound, I reckon they sound much nicer with them than without.;)

[vz57ssz]

I have seen that pex have a rear section with muffler, I didn't really wanna loose my tips, but I hate the raspy sound it makes above 3000.

I might go down to the shop I got it from and see how much it is for the other section, if not I will go a manta system,

[vz57ssz]

I looked them up and found this in the catalougle

BS9587
Pipe size 57mm and 63mm, tuned
muffler design, fully flanged.
Comes with stainless steel tips.

BS9598
Pipe size 63mm, chambered muffler
design, fully flanged.
Note: This muffler is louder than BS9587,
cabin droning will occur at certain speeds.

BS9591
PEX rear.
Pipe size 63mm, fully flanged.
! Recommended for track or off road
use only.

My car seems to be fitted with the straight through BS9591.

[whitels1ss]

Good stuff, well just go and get the " BS9587 " and that should fix it mate:cheers:

[paok_18]

Mate, too be honest it has nothing to do with the rear muffler setup..
The best thing to do, is get a BETTER quality centre muffler. IE Magnaflow, Borla, Di Filippo etc etc..
I have a Twin 3" catback with 4>1 pacies and 100CPI cats. Run just centre mufflers, but they are custom made by Di Filippo i paid $390 a muffler.
It deffinently is not a raspy sound, yet deep and refined similar to a 5L note.
Best thing to do, is buy a new cat-back with good quality mufflers.
Also, the cross-over/kiss pipe/x-pipe etc has alot to do with the note.
Some say, a x-pipe make more KW's how ever not as good sounding as say a H-Pipe or what Di Filippo use a very small kiss-pipe.
Alot of info i have given you, from my own experiences in catback LS1 systems.
I am currently on my 6th Cat-Back now and is the best one i have done!!
Any questions dont hesistate to PM if you want!!

[whitels1ss]

I am currently on my 6th Cat-Back now and is the best one i have done!!


:lmao::lmao::lmao:
It took you 6 tries to get something you are happy with? :goodjob:
Serious buddy you don't need to spend that much money to have a decent sounding system,
but they can be loud without a full set of mufflers and resonators.
The link to the parts which the OP posted before explain what is going wrong.;)

[bozodos]

it's entirely subjective though - I went through 4 catbacks on my last car to find out what I liked, luckily I was able to get all of them cheap on eBay!


One man's sweet note is another's droning, raspy nightmare!

[whitels1ss]

One man's sweet note is another's droning, raspy nightmare!

Nah, they either drone or they don't:teach:
The OP is complaining that it is too loud and raspy...he just wants to make it a bit quieter buddy.;)

[whitels1ss]

Some people want their car very loud and some want their car a bit quieter,
it is subjective and up to the owner how he likes it to sound.

[vz57ssz]

I am quite happy with the loudness of the system, its more of the Raspy sound that I dislike. I am aware though it is hard to get the best of both worlds, unfortunately the exhaust shop I purchased the system from, screwed me over I wanted 4 into 1s and a manta catback.

When I showed up to pick it up, they had the tri y's fitted and this PEX system that I never heard of, they reckon their supplier couldn't get the others and they just went ahead and fitted it all up without asking first.

[whitels1ss]

I am quite happy with the loudness of the system, its more of the Raspy sound that I dislike. I am aware though it is hard to get the best of both worlds, unfortunately the exhaust shop I purchased the system from, screwed me over I wanted 4 into 1s and a manta catback.

When I showed up to pick it up, they had the tri y's fitted and this PEX system that I never heard of, they reckon their supplier couldn't get the others and they just went ahead and fitted it all up without asking first.
From what you quoted from their catalogue if you changed the rear section over to...

"BS9587
Pipe size 57mm and 63mm, tuned
muffler design, fully flanged.
Comes with stainless steel tips."

in my opinion and from how your quote reads it should take away most of the raspy sound and drone.

[vz57ssz]

I was considering trying BS9598, as even without mufflers the drone is minimal and I don't want to silence it too much.

Just remove the raspy sound above 2500rpm, I sent of an email to Berklee asking them prices... I may even buy both rear sections and see what I like better.

What is the main difference though between a Chambered muffler and a tuned muffler?

[whitels1ss]

What is the main difference though between a Chambered muffler and a tuned muffler?

Going from your quote I would think what they would be talking about there would be a straight through style muffler
instead of a more conventional style of muffler with baffles inside and that is why they I think have listed the part with a "written warning" saying................

"Note: This muffler is louder than BS9587, cabin droning will occur at certain speeds."

The other rear section did not have the same warning which is why I suggested you fitted it after you started
this thread because you were unhappy with the loud "raspy" noise from the system which they fitted to your car.

Hey which sound you like is certainly entirely up to you but if you want to pick one out of those three choices and you want the
one which will get the least drone and you get rid of the raspy sound
I think they have given you enough information in their listing to make that choice.

I was only offering a suggestion to help fix a problem with the system which you have fitted, saving you the expense of replacing the entire system.

Good luck with it buddy,

I hope you get it all sorted. :cheers:

[VY Sleeper]

I have ceramic coated tri-y pacey's with 100cel metal cats with a Hurricane 2.5" cat-back & no rear mufflers & it sounds awesome. Especially as I pass 3500rpm as the note changes.

[vz57ssz]

I appreciate the the suggestions and welcome them, I most likely will change to the tuned muffler eventually sometime after xmas and keep the straight through rear section incase I change back

Mine also sounds good under 2500rpm and over 3500 its mostly, its between that 1000rpm gap where its raspy... I will upload a clip of it later and rev to that area.

[bozodos]

Try getting the merge changed to a h pipe, worked for me and 2 other people I know

[VX-SS-383]

Dont want a raspy system, spend the money and buy the diflippo sysytem.
Ive had both 2.5" and now have twin 3" also had supercat twin 2.5" and x force twin 3"
and tried the x force remote muffler.
Found the supercat quite raspy didnt like it,x force way too loud
nice idle but too barky raspy sounding,df twin 2.5" sounded good and twin 3 just awsome.
Going from 1-5/8 try-s to 1-7/8 4 into ones made a fair difference too in sound
and hp.
I did alot of research on different systems and now im happy finally
with how the car sounds.
Your looking at $700 for the df twin 2.5" catback or $1800 for the twin 3.

[macca33]

The PEX systems are a budget line and to be honest, not putting rear resonators on is the main culprit in this instance.

You have some decisions to make - but be sure not to spend a truckload on getting a low-end system right, when you could simply spend a reasonable amount to get the PROPER outcome...:yup:

[vz57ssz]

The PEX systems are a budget line and to be honest, not putting rear resonators on is the main culprit in this instance.

You have some decisions to make - but be sure not to spend a truckload on getting a low-end system right, when you could simply spend a reasonable amount to get the PROPER outcome...:yup:

True, originally I never ordered the PEX system. But that is what he threw on it and it wasn't exactly cheap, the whole setup cost me $2200.

I will never be dealing with him again and most likely will be ordering a new cat back system, though I wont be touching it for a little while since I have a stereo going in next week.

[itsme4g63]

let me introduce you to the sound of my people:

http://www.youtube.com/watch?v=npp2hIw1Ny8

The exhaust starts droning around about 2k rpm when I'm cruising but besides that its very mean.

[bungrs]

let me introduce you to the sound of my people:

http://www.youtube.com/watch?v=npp2hIw1Ny8

The exhaust starts droning around about 2k rpm when I'm cruising but besides that its very mean.

That sounds unreal. Nice system.

Sent from a bar somewhere

[krylothe]

I am quite happy with the loudness of the system, its more of the Raspy sound that I dislike. I am aware though it is hard to get the best of both worlds, unfortunately the exhaust shop I purchased the system from, screwed me over I wanted 4 into 1s and a manta catback.

When I showed up to pick it up, they had the tri y's fitted and this PEX system that I never heard of, they reckon their supplier couldn't get the others and they just went ahead and fitted it all up without asking first.
Then I would be going back telling them to remove it and either give you what was paid for or return it to stock and get a full refund!! Don't let them cheat you outta your hard earned $$ cause I can almost garantee what u got is worth far less then the system you paid for and of a lower quality!

[QldKev]

Then I would be going back telling them to remove it and either give you what was paid for or return it to stock and get a full refund!! Don't let them cheat you outta your hard earned $$ cause I can almost garantee what u got is worth far less then the system you paid for and of a lower quality!

I agree, you paid for a given system and got a lesser system supplied. I would be straight back there.

[whitels1ss]

I agree, you paid for a given system and got a lesser system supplied. I would be straight back there.
Nice in theory,

but...... I think it is way too late after the guy has accepted the system,
paid for it and been driving around for a while with it on.

The time for that would have been when he went to pick up the car and found out what they had done.

[vz57ssz]

I didn't know it was a PEX system until a week afterwards as I didn't look under the car at the time, on the receipt he has written supply and fit exhaust Extractors back total $2200.

I have no complaints with the Headers and High flow cats, just the PEX system. I went down earlier and he said that there is a manta system there now which he could do for $700. though I told him where to shove that, long story short after a lot of back and forth I am getting the Manta for $350 with front mufflers and a hot dog on the rear.

[QldKev]

Nice in theory,

but...... I think it is way too late after the guy has accepted the system,
paid for it and been driving around for a while with it on.

The time for that would have been when he went to pick up the car and found out what they had done.

I think it's fair at time of pickup he may not have known which exact exhaust was mounted. I know when I got my full system fitted up I did not demand to get under the car and inspect the components.



I didn't know it was a PEX system until a week afterwards as I didn't look under the car at the time, on the receipt he has written supply and fit exhaust Extractors back total $2200.

I have no complaints with the Headers and High flow cats, just the PEX system. I went down earlier and he said that there is a manta system there now which he could do for $700. though I told him where to shove that, long story short after a lot of back and forth I am getting the Manta for $350 with front mufflers and a hot dog on the rear.


See if you can keep the pex system, so you could sell it off to try and recoup the extra $ you paid.

[BLACKVE]

Dont want a raspy system, spend the money and buy the diflippo sysytem.
Ive had both 2.5" and now have twin 3" also had supercat twin 2.5" and x force twin 3"
and tried the x force remote muffler.
Found the supercat quite raspy didnt like it,x force way too loud
nice idle but too barky raspy sounding,df twin 2.5" sounded good and twin 3 just awsome.
Going from 1-5/8 try-s to 1-7/8 4 into ones made a fair difference too in sound
and hp.
I did alot of research on different systems and now im happy finally
with how the car sounds.
Your looking at $700 for the df twin 2.5" catback or $1800 for the twin 3.

Listen to this man, the 3" diffilippo is the best ls1 exhaust i've had and if i ever buy a ls1 down the track again would be straight to the difillippo, the 2 1/2inch isn't that expensive.