Has anyone installed a camaro magnaflow muffler on their car? I just purchased this one. http://summitracing.com/parts/MPE-12266 . Just looking for some tips on fitting this muffler in the stock location on my 87gt. The only problem I can see so far is the muffler if pretty wide so im going to gave to cut the inlet down so I can weld the elbow right to the side of the muffler..if you have one installed on your car some pics would be helpful..thanks

------------------
--Mark--
87 GT soon to be 3400 SFI OBD2

[This message has been edited by 86 toy (edited 09-14-2011).]

The muffler is too thick to fit between the cradle and the stock trunk wall.
Most of those who have installed it either had the trunk cut out or moved the front wall of the trunk back slightly.

I wanted to keep my full trunk, so I replaced the rear crossmember (88 cradle) and moved it forward and up to allow the muffler to lay flat and clear everything. I also had to elongate the factory exhaust tube notches in the ends of the main cradle rails for the 2 1/2" tubing to clear:

quote Originally posted by fieroguru: The muffler is too thick to fit between the cradle and the stock trunk wall. Most of those who have installed it either had the trunk cut out or moved the front wall of the trunk back slightly.

I was afraid you were going to say that.. looks like i'll be installing the cradle back in the car to fit up the muffler..thanks for the reply!

quote Originally posted by 86 toy: Has anyone installed a camaro magnaflow muffler on their car? I just purchased this one. http://summitracing.com/parts/MPE-12266 . Just looking for some tips on fitting this muffler in the stock location on my 87gt. The only problem I can see so far is the muffler if pretty wide so im going to gave to cut the inlet down so I can weld the elbow right to the side of the muffler..if you have one installed on your car some pics would be helpful..thanks

I've seen the Flowmaster, Flotech Afterburner and Spintek cross flow mufflers installed but never a Magnaflow. If that muffler is longer than about 14"-15" and it is (18" L), if you want to keep the full size trunk, this muffler won't fit without extensive mods. The only mufflers that I know of that fit are the three that I mentioned.

------------------
" THE BLACK PARALYZER" -87GT 3800SC Series III engine, ZZP Intercooler, 3.4" Pulley, N* TB, LS1 MAF, Flotech Exhaust Autolite 104's Custom CAI 4T65eHD w. custom axles, HP Tuners VCM Suite.
"THE COLUSSUS"
87GT - ALL OUT 3.4L Turbocharged engine, Garrett Hybrid Turbo, MSD ign., modified TH125H
" ON THE LOOSE WITHOUT THE JUICE "

[This message has been edited by Dennis LaGrua (edited 09-14-2011).]

Dennis, of those three you mentioned, which one has the best sound / performance?

quote Originally posted by Tinman29550: Dennis, of those three you mentioned, which one has the best sound / performance?

As far as horsepower goes, I don't believe that we can reference a muffler dyno test for comparison. Unless we have it no one can say. All of the following crossflow mufflers are somewhat non-restrictive though.

On exhaust sounds we are talking opinions so I'll give it a stab.
The Flotech Afterburner muffler is an easy fit but it is a bit loud even with Heddman Hot Tips dual resonators. This is my preference as it gives you a 3" IN with two 2 1/2" outlets..
The Flowmaster is 2" longer than the Afterburner, slighly quieter and but w 2 1/2" Inlets and outlets.
The Spintek has a different sound, maybe the quietest but spinning the exhaust gasses in the muffler with unusual baffles may make it the most restrictive.
One advantage is that Spintek builds to order so almost any size is avalable and the prices are comparable
None of the above can be considering as low sounding and I've installed all three
Magnatech- never used one. The muffler is too big for my applications but its been adapted by others

Again these are opinions so hopefully someone else will chime in with their experiences.

------------------
" THE BLACK PARALYZER" -87GT 3800SC Series III engine, ZZP Intercooler, 3.4" Pulley, N* TB, LS1 MAF, Flotech Exhaust Autolite 104's Custom CAI 4T65eHD w. custom axles, HP Tuners VCM Suite.
"THE COLUSSUS"
87GT - ALL OUT 3.4L Turbocharged engine, Garrett Hybrid Turbo, MSD ign., modified TH125H
" ON THE LOOSE WITHOUT THE JUICE "

quote Originally posted by Dennis LaGrua: I've seen the Flowmaster, Flotech Afterburner and Spintek cross flow mufflers installed but never a Magnaflow. If that muffler is longer than about 14"-15" and it is (18" L), if you want to keep the full size trunk, this muffler won't fit without extensive mods. The only mufflers that I know of that fit are the three that I mentioned.

+1
I measured and measured trying to see if the Magnaflow would fit in my 88; as I really like them. The only way I could see it fitting would be to do what fieroguru did; and I was inches away from doing it. I ended up going with the Flowtech muffler. Even that was a tight fit and required slight midification to fit. The below link is my 3800 exhaust build...
https://www.fiero.nl/forum/Forum2/HTML/115264.html

Here is another pic of the magnaflow being used:

[This message has been edited by fieroguru (edited 09-15-2011).]

quote Originally posted by fieroguru: Here is another pic of the magnaflow being used:

That requires the trunk wall to be moved back, right?

Any suggestions for a good muffler for the 3800sc?

I got the Camaro muffler, dont know what kind, but it just sounds aweful. Sounds like a tractor, or diesel truck. I purchased some headers, and plan on re-workign the exhaust. I am hoping for a better sound.

Also, has anyone every made there own muffler? They dont look that complicated and with the confined space in the Fiero it would be worth the time.

If you want to build your own mufflers check out this place.. http://www.coneengineering.com/mufflers.html
They sell all kinds of parts for do it yourself mufflers. I have bought mandrel bends and tubing from them..they are a great to do business with

quote Originally posted by ALJR: That requires the trunk wall to be moved back, right?

Yes... or removal of the bottom section of the trunk.

quote Originally posted by RotrexFiero: Any suggestions for a good muffler for the 3800sc? I got the Camaro muffler, dont know what kind, but it just sounds aweful. Sounds like a tractor, or diesel truck. I purchased some headers, and plan on re-workign the exhaust. I am hoping for a better sound. Also, has anyone every made there own muffler? They dont look that complicated and with the confined space in the Fiero it would be worth the time.

What kind of sound are you looking for?

------------------
" THE BLACK PARALYZER" -87GT 3800SC Series III engine, ZZP Intercooler, 3.4" Pulley, N* TB, LS1 MAF, Flotech Exhaust Autolite 104's Custom CAI 4T65eHD w. custom axles, HP Tuners VCM Suite.
"THE COLUSSUS"
87GT - ALL OUT 3.4L Turbocharged engine, Garrett Hybrid Turbo, MSD ign., modified TH125H
" ON THE LOOSE WITHOUT THE JUICE "

Just throwing this out there...

This past weekend I was in my favorite neighborhood auto parts store and I saw a poster for Walker stainless steel replacement mufflers. A replacement F body muffler might work, if it is not as wide/thick as the Magnaflow. As they are advertised as "OE replacements" they likely have similar sound to an OE system (not obnoxiously loud like some of the Flowmaster offerings).

After looking over the poster I was wondering what grade of stainless Walker is using for this line of mufflers.

quote Originally posted by lateFormula: Just throwing this out there... This past weekend I was in my favorite neighborhood auto parts store and I saw a poster for Walker stainless steel replacement mufflers. A replacement F body muffler might work, if it is not as wide/thick as the Magnaflow. As they are advertised as "OE replacements" they likely have similar sound to an OE system (not obnoxiously loud like some of the Flowmaster offerings). After looking over the poster I was wondering what grade of stainless Walker is using for this line of mufflers.

Chances are they are 409 stainless..if so they will still rust but should last longer.

quote Originally posted by lateFormula: Just throwing this out there... This past weekend I was in my favorite neighborhood auto parts store and I saw a poster for Walker stainless steel replacement mufflers. A replacement F body muffler might work, if it is not as wide/thick as the Magnaflow. As they are advertised as "OE replacements" they likely have similar sound to an OE system (not obnoxiously loud like some of the Flowmaster offerings). After looking over the poster I was wondering what grade of stainless Walker is using for this line of mufflers.

The stock Camaro cross flow muffler has a 2 1/2" inlets. This muffler might work but when using a muffler on a 3800SC most swap builders use the U bend. With that bend I believe that a 3" downpipe/muffler has its advantages especailly if you are running a smaller pulley. If you plan to use this muffler on a 2.8/3.1/3.4 P/R engine IMO it might be a bit overkill but it should work fine.
Here is what I run. Its non-restrictive but it roars. http://www.summitracing.com/parts/BIG-50363FLT/

,

------------------
" THE BLACK PARALYZER" -87GT 3800SC Series III engine, ZZP Intercooler, 3.4" Pulley, N* TB, LS1 MAF, Flotech Exhaust Autolite 104's Custom CAI 4T65eHD w. custom axles, HP Tuners VCM Suite.
"THE COLUSSUS"
87GT - ALL OUT 3.4L Turbocharged engine, Garrett Hybrid Turbo, MSD ign., modified TH125H
" ON THE LOOSE WITHOUT THE JUICE "

any videos to hear how the magnaflow sounds? on a variety of swaps?

quote Originally posted by Dennis LaGrua: Here is what I run. Its non-restrictive but it roars. http://www.summitracing.com/parts/BIG-50363FLT/

I have the same on on my SD4 Indy. It has 3" inlet, two 2-1/2" outlet.

Flowtech 50362FLT also available. It has 2-1/2" inlet, two 2-1/2" outlets
http://www.summitracing.com/parts/BIG-50362FLT/

------------------
My World of Wheels Winners (Click on links below)

3.4L Supercharged 87 GT and Super Duty 4 Indy #163

quote Originally posted by americasfuture2k: any videos to hear how the magnaflow sounds? on a variety of swaps?

Ill be fitting this muffler on my car no matter what it takes. My exhaust for my 3400 will be custom built headers with 1 5/8" primary's a custom 2" y-pipe to 2 1/2 high flow cat and the magnaflow all mandrel bends..ill post something when I get her running

quote Originally posted by Dennis LaGrua: What kind of sound are you looking for?

I have the F body muffler, 3inch in, and two 2.5" outlets.

It just has a truck sound to it that is not that appealing. I sound trivial, but it does not sound like a sports car. When I install my headers in the spring, I figure I could make a change if someone knew of something better.

quote Originally posted by RotrexFiero: I have the F body muffler, 3inch in, and two 2.5" outlets. It just has a truck sound to it that is not that appealing. I sound trivial, but it does not sound like a sports car. When I install my headers in the spring, I figure I could make a change if someone knew of something better.

Without a DOHC high revs sporty engine (and with a 3800SC engine), I believe that it will be difficult to get a sports car sound . The only guy that I know of that has a Fiero with a true sports car sound is Dave (bmwguru) but he runs a VR6 engine. Oops it actually his wife Joeys Fiero.
If you want something different, try to locate a 3800SC owner that runs a Spintek muffler with resonator tips. They sound different than the muffler that you have and you might like the sound.
In general most 3800SC swaps use a very small muffler (with a quick route to the outlets) with a short exhaust system so there is little distance in which to quiet things down. You probably have the Flotech Afterburner Camaro muffler that roars.BTW, adding headers might make things even louder.

------------------
" THE BLACK PARALYZER" -87GT 3800SC Series III engine, ZZP Intercooler, 3.4" Pulley, N* TB, LS1 MAF, Flotech Exhaust Autolite 104's Custom CAI 4T65eHD w. custom axles, HP Tuners VCM Suite.
"THE COLUSSUS"
87GT - ALL OUT 3.4L Turbocharged engine, Garrett Hybrid Turbo, MSD ign., modified TH125H
" ON THE LOOSE WITHOUT THE JUICE "

OH Yeah, she roars.

BTW, not to change the subject, but do you guys get exhaust fumes in the cab? I closed my windows and sunroof so I know it's not coming thru the firewall. I think it is some how backing up over the rear and coming in thru the sunroof. Doesn't the rear wing create a high pressure area behind the rear window, possibly pushing fumes in thru the sunroof? It is not overwhelming but noticeable.

Or, is it because the Fiero sits so low it is picking up exhaust fumes from SUVs?

quote Originally posted by RotrexFiero: OH Yeah, she roars. BTW, not to change the subject, but do you guys get exhaust fumes in the cab? I closed my windows and sunroof so I know it's not coming thru the firewall. I think it is some how backing up over the rear and coming in thru the sunroof. Doesn't the rear wing create a high pressure area behind the rear window, possibly pushing fumes in thru the sunroof? It is not overwhelming but noticeable.

Make sure the wire harness pass through connector is sealed up around the wires and that the grommets around all the cables are tight. The cabin is a low pressure zone while driving and you can get a draft/engine bay fumes through these areas of the firewall if they are not sealed up good.