Absolutly....if you dont set it off at first when you goose it...hit the switch!

 

The trumpet sound is mainly because you are running straight pipe in combination with the x-pipe. If you just remove the loudmouths, you will still be running straight pipe and you will probably still have the trumpet sound. You will want to try JBAs, Bassanis, or Flowmasters to completely get rid of the trumpet. If you go with mufflers that just have a little insulation around straight pipe, you will still get that trumpet sound.
The only way to keep straight pipe and get rid of that sound is to go with an h-pipe, but thats just not an option so just try new mufflers.
I wish I could give you a definate answer how to get rid of that but you may just have to try out a few setups like I did. Finally bassani did it for me.

 

That's good to know. I'm readying my setup right now, and have the headers, but was still tossing around H/X Pipes. Think I'm going to go with a catted H that matches my longtubes (JBA).

 

Actually, I plan on trying an H-pipe first. But like I said in previous posts, I'll need to have one fabbed up.

On second thought, when I get home tonight, I'm going to measure the center-to-center distance on the stock H-pipe. If is the same (or very close) to the center-to-center distance on the X-pipe, I may just cut out a segment and try slipping that in there. Wish me luck.


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That's good to know. I'm readying my setup right now, and have the headers, but was still tossing around H/X Pipes. Think I'm going to go with a catted H that matches my longtubes (JBA).[/quote]
That's probably a good idea, especially if you don't think your FRPP/Borlas can cancel the sound out.

 

Yeah, to be honest, I don't want it louder neccesarily. I love the way it sounds now, any louder and it'll be crossing over into headache territory. I figure a catted-H is going to be my best bet.

 

It's not the volume of a catted X that's the issue for me, it is the pitch/tone (whatever you want to call it) of sound when you punch it. Someone in another post somewhere said it sounded like a "prop plane"... that's a close description.

 

I know the sound, I've heard it on other cars. I wouldn't like it either, some people actually do.

 

I have to agree with you there. In fact, I wouldn't mind a bit quieter if not losing too much. Strangely, I don't think anyone is marketing a quieter exhaust system, and somehow I don't think mufflers in series is an option. be sure to let us know how the JBA's sound.

 

If you can fab an H-pipe, then you will probably like that sound the best. I just don't want to see you loose money on the x-pipe. The other reason you may want to consider just replacing the mufflers is you won't get the exhaust scavenging with the h-pipe as you will with the x. It won't make much of a difference though until you supercharge it.

 

Last night I decided to test the X-pipe sound vs. H-pipe sound theory. So, I took the factory H-pipe and cut off the cats. Then, I used a pipeclamp spreader to widen the center-to-center distance to match the distance between the new cats. I also shortened the over-axle pipes by a few inches so the H-pipe would bolt in between the cats and the over-axle pipes. After getting everything all tightened up, I went for a spirited drive.

The verdict? It is not the X-pipe that is causing the unwanted exhaust sound. Although it is better with the H than it was with the X, it's still not what I'm looking for. It is definitely loud and sounds great when idling or cruising around, but at WOT it still has the "prop plane" effect (although slightly better than before).

Since I have heard it with open headers (and it sounded incredible then), and it's not wholly caused by the X/H pipe, then it's got to be the cats or the Loudmouths. I guess my next step is to experiment with the mufflers. I really hate to lose the LMs, but I need to isolate the cause of this sound. :bang:

Nothing is ever easy... is it???

 

So true...so so true

 

can you try the H-Pipe with something blocking the H part?

 

I got a chance to hear the car from behind it at WOT at the track Friday night. It sounds better from the outside than from inside the car, and it sounds better at WOT than it does at about 1/2 throttle (it's also OK with very light throttle). Even so, there is still bap-bap-bap-bap sound that is not working for me. I posted some videos in this thread so you can hear it for yourself: http://forums.bradbarnett.net/index.php?sh...=0&#entry607805

 

if you decided to swap out the slp loudmouth's, im local and would come pick them up.

sorry to hear about the issues, hope you resolve the bad sounds

 

I have a set of "pre-owned" Magnaflows being shipped to me right now. I'll try them out and see how it sounds then.

 

Personally its sounds good to me buddy!!! It has that Brrap sound to it!

 

Actually, you really arent correct. I have tested the H-pipe combined with SLPs and without. The trumpeting is mostly caused by the length of pipe running out back IMO.

By adding in turn downs at the ends helped a lot but its not completely without that "trumpet" sound. Straight Pipes are more suited for full throttle performance but the tone is user controllable based on how much gas you give it throughout the rpm range.

 

I can vouch for that. Very little throttle or WOT, it sounds pretty good. In fact, you can hear on my drag race videos that it's got a good (loud) sound at WOT.

But at medium throttle... crop duster.

 

it gets that crop duster sound at about 2700 rpms - 4500. My car sounds like that too but I think that is the resonance of these 2.5" pipes on these cars. I wonder what full 3" from the H-pipe back would sound like Don. It might change the tone of the exhaust. That is just another suggestion if you cant get rid of the "Trombone" sound. Trumpets are higher is sound so its more of a Trombone or Tuba sound. Just my 0.02$.