Imperial62

Performance Muffler Applications on Reattas

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The SS came with it.  The 1988 serial #105 is the one that needs the new muffler. 

 

Having said that, the SS sounds great, has a decent amount of power (not sure the muffler adds any, but it might)  I'll get photos soon. 

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Well shucks, I need a muffler but am having rotten luck. I tried looking up Walker 18240 but it was discontinued. Then I looked for Walker 12265, but all I found was a perf muffler with 2.5 inch inlet and outlet. Then I checked rockauto and they don't list a muffler for a 90 Reatta at all !!

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Chris- THIS is a very cool site, one of those "we have nearly everything" places. Because something is "discontinued" don't limit yourself.

 

I think the dual setup I proposed earlier, and what Members Nittany and Retired w?Reatta have is superb; it's what a Reatta should've come with.

 

Retrojohnny's POST HERE was another fine choice, to keep the outlet "stock". You could just order the parts, and DIY if you're able.

 

Don't give up.

Edited by 89RedDarkGrey (see edit history)

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Agree on not giving up.  Think a little outside the box.  You can do a short reducer/expander piece between the stock tailpipe and the performance muffler 2 1/2 and that solves that. 

 

I have photos of my SS dual with the stamp of the muffler # on it but I am traveling on business.   I meant to add when I had a moment.

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No worries about the muffler. I hit a Deer last night doing about 50 when my headlights were on. It took off the headlamp piece that flips up and down, and a chunk out of the front left fender. Too bad, I enjoyed riding it. My next vehicle is going to be made of steel, with a huge deer-shredder on the grill

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3 hours ago, ChrisWhewell said:

It took off the headlamp piece that flips up and down, and a chunk out of the front left fender. Too bad, I enjoyed riding it.

 

That sounds like you're giving up the whole car, now:unsure:

 

Those pieces are easily obtainable, and replaced. And- probably way cheaper than C5 parts.

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I thought I'd get some comments about the sound.

It takes less than a minute to download.MVI_1663.MP4

S.

On 11/12/2017 at 6:26 PM, Retired w?Reatta said:

This is a 1990 stock Camaro muffler.  I have since painted it flat black, except for the outlets, which are SS.  On the right side I cut out a piece of the black plastic to match the cut out on the left.

I like the look and it definitely sounds throatie

 

IMG_1660.JPG

 

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Stanley- I think it sounds beautiful- the way a "luxury sports car" should sound. A slight rumble for normal cruise, then aggressive & throaty when stepped on. If Buick had just done a few tweaks- the Reatta wouldn't have been such a failure. Optional manual trans, T-tops, true dual exhaust, maybe even an SC for '91 could've saved it a few more years. Going on 30 years- I really don't see how GM justified $28k for an '89. Other than the "upgrade" (:lol:) of TEVES ABS, and a touch screen that nobody (especially the target demographic of Customers) wanted- the Reatta was kind of "mundane". Yea, ok- "hand built" means what? Higher cost? "Attention to detail"? I'm the 3rd owner of my '89 #3111, and the only owner to work on it. I have found numerous stupid things wrong. The grommet for the trunk lock solenoid & light harness- was simply on the harness, but not snapped into it's hole. Every hinge (hood, door, trunk) was painted, and not one dab of grease or drop of oil applied. The 3-point cargo strap still in it's bag, rubber band, thrown under the spare tire. The first owner couldn't have cared less- and then it was a used up beater when his Daughter inherited it for 2 years- and then it sat, waiting for me.

 

I can't wait to do mine next year, among other much needed work. Is the bumper fascia hard to trim? I would think- just a piece of cardboard as a template?

 

Your Reatta is a beautiful example of what it should have been.

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Thanks, I really like the sound also.

I agree that Buick could have done better to make the Reatta more marketable.  

But I also believe it's one of the better made cars out there.  I'm the second owner of my '90 and it just turned 233,000 miles: Original engine, original tranny.  Not many other cars can do that.

I still don't understand why there's no demand for them; there are a few in my neighborhood for sale in the $800 to $5,000 (ragtop) range.  Good condition but no takers.

Yes, I used a piece of cardboard as a template copied from the left side.  The bumper fascia was not hard to cut; I used a general purpose shop scissor.

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I really like the Borla Cat-Back system ... Looks like I would have to modify the rear to accommodate the dual exhaust  however would definitely look and sound nice.  Has anyone ever done this type of exhaust on their Reatta?

 

https://www.borla.com/

 

 

 

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8 hours ago, NCBRIJEN said:

Has anyone ever done this type of exhaust on their Reatta?

 

Even though the "Enter Your Car Info" section dummied-up the second I typed "1989 Buick Reatta" and there were "No Results Found" I still entered my info on the "Request Page".

 

I will get back here with their response.

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Here is the aftermarket muffler on my Select Sixty. I drove BOTH the 88's today and the Select Sixty is faster, better performance.  

 

 

DSC02549.JPG

DSC02551.JPG

DSC02541.JPG

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On 11/18/2017 at 4:26 PM, 89RedDarkGrey said:

 

Even though the "Enter Your Car Info" section dummied-up the second I typed "1989 Buick Reatta" and there were "No Results Found" I still entered my info on the "Request Page".

 

I will get back here with their response.

Did you ever hear a response back?.. I wonder if I were to purchase their mufflers how hard and $$ it would be to find a local garage to shape some stainless steel pipes to retro fit?

 

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On 10/5/2017 at 4:40 PM, Barney Eaton said:

I did a little looking on muffler web sites and none are really helpful.

I sent a note to Walker and they came back with a little info, including this picture of the inside of their muffler for a Camaro.

On the Camaro the "IN" is the top right.  The Camaro tailpipes come out on each side.

If you used it on a Reatta, the LEFT pipe would be the "IN" and the right pipes would be "OUT"

That hump in the center would keep the sound from being straight thru.....it should work, the unknown is the sound level.

Walker part number is 12265

 

Capture327.png

 

Wrong, The right upper pipe is the in tube and the lower on each side are the out.

Also, the part number is incorrect.

Edited by 63viking (see edit history)

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13 minutes ago, 63viking said:

 

Wrong, The right upper pipe is the in tube and the lower on each side are the out.

Also, the part number is incorrect.

If you are using that muffler in the photo to replace the stock Reatta muffler with twin exhaust on one side Barney is correct. If the muffler is used for dual exhaust with a pipe on each side of the car you are correct. What is the correct part number for that muffler?

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5 minutes ago, Ronnie said:

If you are using that muffler in the photo to replace the stock Reatta muffler with twin exhaust on one side Barney is correct. If the muffler is used for dual exhaust with a pipe on each side of the car you are correct. What is the correct part number for that muffler?

 

That's what we were talking about dual exhaust not stock exhaust.

ANYway, How could you use this muffler for a single exhaust, with three pipes?

Edited by 63viking
Addition (see edit history)

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What is the correct part number? Posting it here would help someone who wants to use this muffler.

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56 minutes ago, 63viking said:

That's what we were talking about dual exhaust not stock exhaust.

 

Actually the topic is about performance exhaust. Not just dual exhaust. Imperial62 started the topic and below is what he said about what he was looking for. RetroJohnny's car has twin exhaust pipes, Not dual exhaust.

 

 

On 10/5/2017 at 9:11 AM, Imperial62 said:

Thanks all. Yes - Flowmaster is the name I was thinking of. I finally remembered and saved their website but RetroJohnny has done exactly what I want to do and included the Flowmaster part #. 

 

This is the route I will be going.  

 

RetroJohnny's photo of his exhaust

20171005_003503.thumb.jpg.147330a7b106c9

 

 

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Not to add the debate of stock style vs dual, which is a personal choice of course. In years of looking at various manufacturers, the only one I have found with actual flow rates and a decent tech section is the Dynomax site. I haven't found similar information on any of the other of the major performance aftermarket makers such as Borla, Magnaflow or Flowmaster. They all have generic language and I am sure there are lots of satisfied customers, but for actual data, that seems to be lacking. That said, in stock form our cars don't have great demand especially with the muffler at the far end of the system. For what it is worth: 

 

 http://www.dynomax.com/downloads/product-catalog/2015_dynomax_techsection_secure.pdf

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Just went to ebay and entered 18240 muffler and a listing came up. $42.00 plus $17.00 shipping. Not original but checked out by "Reattaforever" as a direct fit. Still 3 left...

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2 hours ago, Ronnie said:

What is the correct part number? Posting it here would help someone who wants to use this muffler.

 

And what is the definition of a performance exhaust?

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31 minutes ago, 63viking said:

 

And what is the definition of a performance exhaust?

 

The definition of a performance exhaust will vary from one person to another. Some people think a loud exhaust is a performance exhaust because it makes you feel like you have more power. I've been guilty of that myself. :)

 

Generally speaking, my definition of a performance exhaust would start with a set of equal length tube headers that would go into a collector for a true scavenging effect. The length and diameter of the header tubes would be tuned to match the cam profile and other engine specs.  Calculations can be made to determine the correct length of the header tubes, as well as collector length and diameter, to achieve the best performance for a specific engine configuration. Most engine builders use computer programs nowadays to make the calculations but it can be calculated by hand if you have the correct formulas. Behind the headers would be individual exhaust pipes for each collector that would go into two separate low restriction mufflers. I don't think it is possible to put a performance exhaust system on a Reatta that meets my definition of a performance exhaust system unless you build it yourself. I don't think you will find equal length performance headers for a Reatta in the speed shops.

 

Considering the Reatta exhaust consists of one exhaust pipe going into one muffler and the 3800 is such a low RPM engine,  I don't think the exhaust pipes coming out on both sides of the car (dual exhaust) versus them coming out side by side as the stock exhaust does (twin exhaust) would make a bit of difference in performance with everything else being equal. I think supercharging or turbocharging to force more air through the engine is a better way to go than trying to find the best side to locate the ends of the exhaust pipes.

 

Just my opinion. You know what they say about opinions...

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5 hours ago, NCBRIJEN said:

Did you ever hear a response back?.. I wonder if I were to purchase their mufflers how hard and $$ it would be to find a local garage to shape some stainless steel pipes to retro fit?

 

 

Nope. I would dare to say- that if you went to a reputable "Muffler Shop" (depending where you live) Monroe, Midas, Mavis (my #1) and if they have a Mandrel- they should bend stuff up for you. Bring a dozen donuts with you- Shops love that:lol:

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