No exhaust threads any more.

[eighty6gt]

I think, as with everything, I just have to spend more money and keep experimenting.

I have longtubes, 3" off road H, pypes m80 resonators. I was running FR500 mufflers, have used these with the stock manifolds and cats/midpipe as well.

I seem to have a different opinion of the 500's than most people. The exhaust note is high pitched with a terrible rapping at 2800-3500 with any throttle (boost) at all. I think most people with these are n/a. I liked the shooting ducks on decel and shifts, and scaring the living hell out of everyone, and hurting my eardrums under overpasses, but hated the rapping all the time right when I was just trying to drive normally here and there.

Put my factory mufflers back on and with the m80's the car sounds pretty stock. Deep roar with now audible blower whine and with the 69mm pulley, tire squealing noises!

I had a central merge designed, a pro chamber, and will try this with the 500's to see if I can deepen the tone and kill the rapping. It will essentially change the length of the exhaust as the sound waves see it. The rapping has to be constructive interference.

Any other ideas? MBRP's are straight thru, but cheap. Corsa extremes?

 

[06 T-RED S/C GT]

Did you experience any rapping and was the exhaust note also high pitched when you ran the stock manifolds and stock catted midpipe with the FR500 mufflers?

 

[07gts197]

Not a specific muffler but Bassani used to sell a mid muffler for the s550 thats pretty much a dual in/out chambered muffler that sits after the h pipe. That would be interesting to hear on these cars.


Sent from my iPhone using Tapatalk

 

[Pentalab]

I think, as with everything, I just have to spend more money and keep experimenting.

I have longtubes, 3" off road H, pypes m80 resonators. I was running FR500 mufflers, have used these with the stock manifolds and cats/midpipe as well.

I seem to have a different opinion of the 500's than most people. The exhaust note is high pitched with a terrible rapping at 2800-3500 with any throttle (boost) at all. I think most people with these are n/a. I liked the shooting ducks on decel and shifts, and scaring the living hell out of everyone, and hurting my eardrums under overpasses, but hated the rapping all the time right when I was just trying to drive normally here and there.

Put my factory mufflers back on and with the m80's the car sounds pretty stock. Deep roar with now audible blower whine and with the 69mm pulley, tire squealing noises!

I had a central merge designed, a pro chamber, and will try this with the 500's to see if I can deepen the tone and kill the rapping. It will essentially change the length of the exhaust as the sound waves see it. The rapping has to be constructive interference.

Any other ideas? MBRP's are straight thru, but cheap. Corsa extremes?

I don't have high pitched anything. JBA 2.5" hi flo catted H. FRS-500 mufflers. JBA LT's.
U have the 3" collector JBA LT's.... while I have the 2.5" version. Both ur's and mine LT's are titanium ceramic coated. The only difference is u have no cat's.

We only have 2 underpasses here in town. ( 50 kph limit) . I slow down, lower both windows,
drop into 2nd gear... then mash it. The sound is exquisite. (the cop going in opposite direction in the same underpass was not amused).

 

[oldVOR]

(the cop going in opposite direction in the same underpass was not amused).

LEO's are not usually amused at peoples antics....no matter how innocuous the antic....

 

[eighty6gt]

Did you experience any rapping and was the exhaust note also high pitched when you ran the stock manifolds and stock catted midpipe with the FR500 mufflers?

Yep, took the 500's off and ran dead stock for a while for that reason.

It's why I painstakingly installed the m80's.



Pypes OTA pipes are only 149 USD. I think I'll grab some of these, build my merge/helmholtz/pro chamber with a 3" e-cutout off of the side that when opened lets my wotbox work, and continue to run the Bullitt mufflers. I miss the backfiring but not as much as I hate the "Chevy 305 truck with 2" press bent exhaust and bowtie tip" sound I was getting.

 

[eighty6gt]

LEO's are not usually amused at peoples antics....no matter how innocuous the antic....

I got pulled over because I flubbed a signal on a lane change and my car was "loud." Lady said she had to pull me over, and I was driving aggressively, but nothing too crazy! So nice.

 

[Pentalab]

LEO's are not usually amused at peoples antics....no matter how innocuous the antic....

Esp when I eventually get pulled over, and they find a 63 yr old guy...going on 17. This is the 1st summer in 10 yrs, that I have not been pulled over for something. When the LT's were 1st installed, a chinese cop pulled me over, and wanted to get the VIN from the doorjamb. I open the door, and put one foot onto the ground, and the little prick pulled a gun on me. He threatened to impound the car for...'too loud'... + 'stunting', speeding, no seatbelt, plates came back as...'terminated' ( I just put em on the day b4),....'attitude problem'.... and something else. He saw the roush boost gauge in the far left vent pod...and went beserko.

 

[06 T-RED S/C GT]

Yep, took the 500's off and ran dead stock for a while for that reason.

It's why I painstakingly installed the m80's.

View attachment 70575

I was actually considering replacing my Borla ATAK mufflers in favor of the FR500 mufflers, but after reading over what you mentioned about experiencing a higher pitched exhaust note and terrible rapping with the stock manifolds and stock catted mid-pipe still in place? It appears that I'll be sticking with my Borla ATAK mufflers, as they don't have any rapping to them at all and still have a deep exhaust note even with the Pypes exhaust cut n clamp X-pipe to stock catted down-pipes.

 

[eighty6gt]

Was noticeable, if you're naturally aspirated maybe they'd work.

 

[06 T-RED S/C GT]

Well I'm definitely not naturally aspirated, I'm running a Saleen VI S/C with 3.6" pulley and JDM tune. So looks as though I'll be staying with my Borla ATAK mufflers lol.

 

[eighty6gt]

I'm thinking of building a boss 302 style side pipe system...

 

[ghunt81]

Maybe Borla Tourings? They are pretty loud at WOT but maybe not as ridiculous as the FR500's.

I'm messing with my exhaust again, putting short glasspacks right after the H pipe, and putting my MBRP's back on. Gonna see how that setup is.

 

[eighty6gt]

I was looking at the mbrp's as they are cheap and seem to be a straight through design. You must have some "trumpeting' , drone, or resonance?

 

[06 T-RED S/C GT]

If your running off-road and don't want to add high-flow cats? I'd follow ghunt81's recommendation with the Borla Touring mufflers, as they sound great when running off-road and LT header setups and they also do not drone.

 

[eighty6gt]

Dont want to spend $1600 on cats

 

[06 T-RED S/C GT]

Then follow ghunt81's recommendation and go with Borla Touring mufflers which are also straight thru design.

 

[ghunt81]

I was looking at the mbrp's as they are cheap and seem to be a straight through design. You must have some "trumpeting' , drone, or resonance?

I'm still running cats but yeah by themselves MBRP's are loud all around. They would be way too loud with no cats at a all. That's why I'm trying them with some small resonators.

BTW MBRP's are louvered core.

 

[eighty6gt]

I don't mind volume, only the chevy 305 sounds at low rpm bother me. As I said I already have resonators - I'm not sure they'll do much. They do work with the factory mufflers in place, it's as though the back pressure allows them to do something. Once you're uncorked it seems like the exhaust just flows through.

Anecdotal as always. I did see the louvers in the MBRP's - you must still be able to see light through them, though, same as a giant louvered glasspack.

 

[ghunt81]

Yes they are straight through, that's what I meant...they are just louvered core and not perforated core.

I also did get some trumpeting and resonance with the MBRP's when I ran them with no resonators.

I glazed over the part where you said you had resonators- well, I had similar sized Magnaflows on my car for awhile as resonators. When I ran them with the MBRP's I thought it was TOO quiet. That's why I'm trying the little bitty 9.5" body glasspacks that I just bought.