New Exhaust

M

manson73

Registered
Well, I got back more from Uncle Sam than I was expecting so I went and got a new exhaust installed. Pic's and videos are on my website:
http://mark8.org/users/manson73

I went with a single muffer (2.5" dual-in/dual-out) mounted under the middle of the car. It's basically an X-pipe and a muffler all in one. You've probably seen some of the other guys use this along with two more mufflers at the rear of the car.

I thought just the middle muffler would be OK, but from driving around the past two days, I've decided to add two rear mufflers. Previously, I had a single 3" pipe running to the stock mufflers with a cutout to bypass the mufflers. With the exhaust wide open, the car had a drone at 1700-1800rpm's (65-75mph) but I could tune it out with a reduced-opening cutout cap. With this new muffler, the drone is now at 1200-1400rpm's (40-55mph) and makes city driving very annoying with stock gears. With 3.73's or better, I'm sure it would be fine as the revs would stay higher.

Oh yeah, I know the pipework isn't the greatest, but it was the guy's first Mark VIII. It doesn't rattle or leak, so I'm happy. Also, he only charged me $180 which included chrome tips - that they were out of - so I'll get them installed with the rear mufflers. I'll may end up ditching the center exit depending on how the rear mufflers fit.

I'll post again when the rear mufflers get installed.




http://www.mark8.org/users/manson73/sigburnout.JPG
 
RE: New Exhaust

Nice, I like it. That's the first I've seen the dual-in / dual-out muffler used like that.
 
RE: New Exhaust

Very nice looking Matt, did you "lose" the cat's? Can't tell from the pic's.

** Bill **
1995 LSC-R'ed w/Recaro's and Cobra R's
Veteran of Carlisle 2000/01/02/03
[a href=//cardomain.com/member_pages/view_page.pl?page_id=258112]For Pic's and Mods click here[/a]

...If you can read this, thank a teacher...If it's in English, thank a veteran....
 
RE: New Exhaust

HEY MAT!!

Its great to hear from you again, how have you been? and how are things up there so far?

We sure miss that low 14sec beast around here.

I hope all is well.
 
RE: New Exhaust

No Bill, the cats are still there. It was enough work convincing the guy he could fit two - 2.5" pipes under the car. I didn't want to press my luck :)

Moe, things are going well up here in SC. I miss the Florida weather, but it's finally starting to warm up here this week. I met some Mustang guys at work so hopefully I'll be going to the track soon.


http://www.mark8.org/users/manson73/sigburnout.JPG
 
RE: New Exhaust

dam, i am getting bet at everything i want to get done to my car, i need some free time to do stuff, i am planning on running a true dual exhuast w/ to muffler under the car and run a single tip up the middle of the bumper and another thing someone over on tccoa might beat me to is black crome rims, here is a pic of his bird, i love to get some deep dish rims like that too, nice setup thou, could use a nice set of tips thou http://forums.tccoa.com/showthread.php?s=&threadid=34825
 
RE: New Exhaust

Well, I'm not the first to do a center exit. Chris K. (unstoppable) did one a while back. Mine won't last for long, though. The drone at 45-55mph is getting on my nerves so I'm getting two rear mufflers added and I doubt I'll be able to maintain the center exit with them. I didn't do any tips because I wanted to check the sound out first. Now I'm glad I didn't since they would've had to be removed and reinstalled with the new mufflers.

Still, though, this single muffler is amazingly quiet when cruising over 60mph (over 1500rpms.) You can barely hear it until you hit the gas. I know if I had 3.73 or better gears I wouldn't even consider the extra rear mufflers.


http://www.mark8.org/users/manson73/sigburnout.JPG
 
RE: New Exhaust

Ever thing bout adding a x or h pipe. i thought bout doign a double h pipe ever been done before i dont know, how woudl that benfit performance
 
RE: New Exhaust

they is plenty of room, the exhuast guy is just going to have to join to pipes to make a custom x pipe, like dan's x pipe, or bout bout a double y pipe(now at his point i am being a smart ass ever seen a double y pipe, ) - muffler>----< cats.the double ypipe is in between the muffler and cats hehehehehehehehe
 
RE: New Exhaust

http://www.cardomain.com/id/my93markviii


Well I just wanted to say thanks for you coming up with this idea,Cause of about 20mins ago I got the same setup,I had been trying to come up with a idea of how to have tailpipes longer than 5inches, and now I finally have the sound I have been wanting,so I must say hats off to ya for the idea of the exhaust.......
 
RE: New Exhaust

Hi Matthew, Boy are those Mustang guys at work in for a supprise. LOL!
 
RE: New Exhaust

Yeah, Jack, from the way they talk, they're in for a shock.

Here are the rear mufflers I'm having put on next week.

Hooker Aero Chambers. Almost a straight-thru design (offset inlet, center outlet) with a huge expansion chamber. Should take care of the drone and not add much restriction. And, of course, they're black so most people won't even notice them. They will have chrome tips, though.

http://www.mark8.org/users/manson73/AeroChamber01.jpg

http://www.mark8.org/users/manson73/AeroChamber02.jpg



http://www.mark8.org/users/manson73/sigburnout.JPG
 
RE: New Exhaust

I have AeroChambers on my 70 Cutlass. I really like how they sound, suprisingly tough. Totally different engine and exhaust system then Mark 8's though.
 
RE: New Exhaust

Looking good Mat! I've been considering doing that too. Glad to know about the drone issues, will help in my decision. Which part of SC are you in? Upstate, Midlands,or Lowcountry? I'm a native in the Pee Dee Lowcountry between Florence and NC stateline, just off I-95. If your track is nearby(Darlington?), I might make it out to see you run.

Jeff
PalmettoMarkVIII
'94 Base Black/w Grey Int.
 
RE: New Exhaust

Jeff, I'm in Columbia. The nearest track to me is south in Orangeburg, but it's just a 1/8th mile. Although it looks like Darlington isn't very far away, either.

LINCOLNBOY, I thought about getting more Magnaflows, but I wanted something that didn't have a 100% straight through design. Plus, they're just different :)




http://www.mark8.org/users/manson73/sigburnout.JPG
 
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