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Posted by: mattp Feb 11 2007, 11:44 AM

I have a 1975 1.8 stock engine. Prior owner put a Monza muffler on it and it is really loud and starting to get holes in it.
I use it as an occassional car, mostly summer but as long as no snow drive it in winter so I want heat, I dont mind some noise but its REALLY loud now.
So long as I am changing mufflers I woyuldnt mind picking up a few hp.
any ideas?

Posted by: boxstr Feb 11 2007, 11:54 AM

I would not recommend anything other than a Triad.
http://www.triadwestperformance.com/Products.htm
CCLINTRIADHASMYMUFF

Posted by: Dave_Darling Feb 11 2007, 02:57 PM

Does the car have the stock 75-76 heat exchangers? If so, you're kinda stuck... Stock or Bursch that I know of.

The late-style exchangers have a single pipe inside them, the muffler flange is a triangle. The early-style ones have two pipes inside them, and the muffler flange is a trapezoid shape.

--DD

Posted by: Andyrew Feb 11 2007, 03:30 PM

There is the option of taking it to an exhaust shop and having them put some good mufflers on it.. like a magnaflow...

Posted by: mattp Feb 11 2007, 03:42 PM

exhaust shp intrigues me, remonds me of when I was younger, hot rods and all that...
I ahve stock heat exchangers and need to keep heat. I read some people go to the stainless HE for less weight and more power any ideas?

Posted by: Dave_Darling Feb 11 2007, 04:00 PM

The late-style exhaust is not very efficient. For heat and a little (probably very little!) boost in power, you can backdate to the earlier style exhaust. SSIs are nice because they don't rust, but going with the stock mild steel ones works well too.

You'll need the appropriate muffler hanger to go with whatever heat exchangers you switch to (e.g., 1.7 or 2.0) and a muffler to match. There is a much wider range of choices for the early-style exhaust than the 75-76 one.

--DD

Posted by: Andyrew Feb 11 2007, 04:04 PM

You need to find out if you already have SS heat exhangers.
Alot of cars were shipped from the factory with them.

fyi the mufflers you currently have are damn loud.. because they are blown out... Almost all of those things blow out.

You could replace the mufflers in your monza exhaust with cheap turbo mufflers and quiet it down a little. or if you want to spend the $$ and buy a pair of name brand mufflers to put in place...

If you want the most hp.. The triad system is the way to go... they sound the best.. but they are the most expensive...

Go down to a reputable muffler shop and ask them for photo's of their customer cars. See what they specialize in, if its stock replacements, or hot rods and custom piping.. Generally the hot rod guys love doing buisness under the table (cash only) and will give you a good deal and take care of your car while your doing it, as they are used to high end cars coming in for serious $$ exhausts.. While your there, see if they will put in on the rack and (take pics) give you an estimate.. then once you've done some research on muffler prices, ebay stuff, ect.. then you can make your decision.

Andrew

Posted by: pete-stevers Feb 11 2007, 04:10 PM

yup i agree with craig...traid west.....good guy ....sounds ubber cool....and well built and great finish!!

Posted by: 904svo Feb 11 2007, 07:44 PM

Look at a Walker 22385 muffler is the same one Bursch uses on there exhaust system.

Posted by: Dave_Darling Feb 12 2007, 09:32 AM

I don't think that's correct. A lot of cars have had them installed post-factory, though.

More important than exactly what material the exchangers are made out of is if they are the eary (70-74) type or the late (75-76) type.

--DD

Posted by: rhodyguy Feb 12 2007, 10:22 AM

when back dating to the earlier setup, either 1.7/1.8 or 2.0, you also need to source the correct heat related duct work.

k