Dynosheet...

[Superdave]

flowmaster mufflers have some of the worst flow ratings of any "performance" mufflers out there.


I tried several different ones, 40's, Delta 40's, 80 series etc.. i finally moved on to Hooker Aerochambers. Same chambered sound without the annoying drone and tons more flow.


2.25" or 2.5" is fine for a 3100, your best bet is to take off the downpipe, and start from the flange. almost all 3x00 engines have a restictor in the downpipe that reduces the size down to less than 2".

if you can find a set of "header" manifolds from a 3500v6, run 2" off of each one, merged into 2.5" with a good cat and a good muffler you'll have a very nice flowing system.

FYI, people have also used the steel headers from the older 3800's, modified the middle tube and welded on the proper flanges.. that's a really easy way to get budget headers. the 2 outer pipes line up almost perfectly.

[stonecold0469]

Ok...can u get me a video of ur mufflers...I'm the kind of guy who loves flowmaster's sound...but I'm very openminded to this...also I plan on going turbo so the stock manifolds are staying for now...unless there are better manifolds available...also in here I have not found somebody that makes mandrel tubbing...can I find it online then have it done on a shop here? Also nobody wants to do my downpipe here...I live in Puerto Rico....what to do, what to do???

[Superdave]

you can buy mandrel U bends from Summit for the exhaust, i've built 2 systems for my car and both came out good with their parts.

Mine might not be the best example of the aerochamber sound, i have true duals off of longtube headers with a pretty big cam, it is quite different sounding than a stock 3100 with manifolds.


Here is a stock 3400 swapped Sunbird 5 speed with an Aerochamber Crossflow (made for a Camaro). http://www.youtube.com/watch?v=Dnbgj...eature=related

you might have to register to see them but there are quite a few sound clips of different mufflers here: http://www.v6z24.com/jbodyforum/offi...ad-t93988.html

[stonecold0469]

Ok I'm now at work...I'll see them when I get home

[Superdave]

you can get an idea of mine here: http://videos.streetfire.net/video/L...est_206907.htm

Here is a link to some of the mandrel bends on Summit: http://www.summitracing.com/search/D...s/?Ns=Rank|Asc

[stonecold0469]

i like the sound of yours...but in the sunbird...it's lets say..."Silent" I Like Roaring Cars!

[Superdave]

lol, trust me.. it wasn't silent at all. I could hear him from about 1/4 mile away. Once he took his cat off it was even louder.

[stonecold0469]

Ok...I'm going to do the exhaust from the flange of the downpipe. Now I need a flex and all the tubes, I can buy from summit including the mandrels...I'm not putting a cat nor resonator...so I also plan on buying a magnaflow Y to go duals after the fuel tank...everything being 2 1/2" and the tips out back 3"...now for the muffler...which one to choose? Also how many straight pipes would I need from summit and how many U mandrels would it need...aproximately for the set up?

[stonecold0469]

I also encountered myself with another problem...in my father's lumina the car doesn't start...why? There is a 20 fuse in the fuse box near the PCM which is blowing everytime I put a new one. It says PCM BAT what is going on with it?

[robertisaar]

if it keeps blowing, there is probably a short(probably insulation on the wire that got rubbed off) somewhere after the fuse, that would do it.

[stonecold0469]

Ok...I'm going to do the exhaust from the flange of the downpipe. Now I need a flex and all the tubes, I can buy from summit including the mandrels...I'm not putting a cat nor resonator...so I also plan on buying a magnaflow Y to go duals after the fuel tank...everything being 2 1/2" and the tips out back 3"...now for the muffler...which one to choose? Also how many straight pipes would I need from summit and how many U mandrels would it need...aproximately for the set up?

[Superdave]

dunno.. someone with a Lumina would have to take some measurements and maybe make a drawing..

[stonecold0469]

Ok I need to find that guy soon!!! Also whatdo you think of the Y magnaflow that summit sells?

[Superdave]

http://www.summitracing.com/parts/MPE-10778/

that one?

Seems ok as long as you have room for it.

[stonecold0469]

Ok I will order the parts as soon as I can and let you guys know how it went