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Engine Specific Info and Questions => IDI Engine => Topic started by: DRP67207 on January 20, 2011, 05:54:39 am
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I'm thinking about welding up a new exhaust system for my 1.6 na caddy. After doing a little research, I'm thinking of going with 2" diameter aluminized system with a dynomax superturbo muffler and a resonator, but am wondering what people are using for resonators. Any suggestions as far as brand/model would be much appreciated. Thanks.
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call techtonics tuning, see what brand they use in their exhaust systems.. there fair priced too IIRC..
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joining this thread to see what people say... I also want to put a new exhaust on my 1.6NA. I was thinking of going with 2.25". I currently have a stock resonator from a VR6 I was going to use... but I was considering running a 2nd resonator as I have herd a larger exhaust on the NA's is pretty loud...
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well think of it, these engines are SOO LOUD because they have about the most compression out of any engine ive ever seen factory..
24:1 compression does not make a quiet explosion..
anyone remember how loud 6.9 and 7.3 n/a's were?!
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well think of it, these engines are SOO LOUD because they have about the most compression out of any engine ive ever seen factory..
24:1 compression does not make a quiet explosion..
anyone remember how loud 6.9 and 7.3 n/a's were?!
The stock exhaust doesn't seem that loud; Though there is certainly a good deal of noise coming from the front of the car ;D
I guess I don't want put a new exhaust on and have an un-godly drone when I'm cruising at 70mph (there is enough noise coming from other sources in a Mk2) Just hoping for another small boost in economy and power to complement a Giles pump ;)
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they are not loud with a factory exhaust because:
its choked up, and doesnt flow well, i dont think the pipe is even a full 1.5" diameter..
the muffler is huge, and is a multi pass style, adds a fair amount of back pressure..
and theres usually a resonator directly below the shifter..
take and cut your muffler and resonator off tho, then it will be LOUD. like louder than any fart can equipped ricer on the planet..
there is such thing as having a big exhaust and still having it be quiet tho..
2.5" with resonators, and a magnaflow muffler, or 2 even.
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I talked to TT, and they sell the resonators that they use in their systems. They are a perforated style with some kind of glass pack, made for them in a variety of pipe diameters, and sell for $40 or $80 for stainless. Seems like a good solution to me.
Yeah, it seems like most of the racket is coming from the engine and the stock exhaust is nice and quiet, but once I have an exhaust put together, I'll update with a noise report.
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I installed Jones Full Boar, purchased from Summit Racing... less than $20. I got one of the longer ones at 17" overall with a 12" case length. The diameter is 3.5". The tech told me that it's reversible, if I wanted to quiet it down a bit, but it would reduce the flow. I oriented it for maximum flow, and the car is very quiet. I'm running a 20+ y/o TT 2" system with a Dynomax Ultraflo. This is on a'82 Rabbit.
It's a louvered glasspack. FYI, if it has packing, it's a glasspack and considered to be a muffler..... resonators are hollow.
-Todd
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you can tell what they are just by tapping them with a chunk of metal, a screwdriver, something like that..
if it goes THUD, its a glasspack..
if it goes TINK its a resonator..
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just to clarify (as I've never run a glasspack) The packing material will eventually burn/erode away from use? The exhaust will get louder over time as this happens ???
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they burn away on gassers, they clog up on diesels..
it will get soo soot packed that it wont hardly work no more..
i had a glass pack on my 84, and it got progressively louder the whole time i ran it..
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So is there a way to get around this clogging issue, or does one just have to replace diesel mufflers every so often? Do all mufflers have a packing that will clog?
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nope, chambered mufflers(like most cars use stock) have no packing, and can flow very well.
I am partial to "turbo" mufflers, they are cheap, sound good, and dont choke up the exhaust too much.
-Owen
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nope, chambered mufflers(like most cars use stock) have no packing, and can flow very well.
I am partial to "turbo" mufflers, they are cheap, sound good, and dont choke up the exhaust too much.
-Owen
cheap turbo mufflers are junk.. ive never really liked them. ive never really ran a quality one, so cant say much about those.
and on a diesel, if you cant see thru it, its going to take some power away..
i put a 2.5" flowie 40 series on my black car.. and even as free as those mufflers are, i still lost a few psi boost..
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Just to update, finally got my exhaust done. I stuck with the mk2 toilet bowl, had a 2.25" downpipe made, and I did use the resonator I got for free (pretty sure it was from a VR6) the good news it really woke the car up (1.6 NA) and is not that much louder at all... which Is what I was looking for... trying to avoid drone on the highway. Seem to be getting no smoke with my foot to the floor anymore... which means I can probably turn up my pump a little more now... ;D
on the downside though, I noticed a few tiny flecks of oil in my overflow tank :( seems like I may need a headgasket soon... but that's another thread... :-\
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i replaced the resonator on my TD with a very big very cheap glasspack and it worked wonders. Very quiet.
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td is one thing, dont use a glasspack on a n/a tho... it will RAP soo bad..
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td is one thing, dont use a glasspack on a n/a tho... it will RAP soo bad..
Does not. It sounds wickedly awesome. I have a straight pipe with a glass-pack on a 2" exhaust. I also have a fully shimmed governor, and the good exhaust note doesn't even start until 4000 rpm's.. Under 4000 it sounds like i have a full exhaust with muffler and resonator.
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Pends on the glass pack.. I had some an uber cheap one on the old Rabbit.. It sounded kinda raspy, but I think there was something rattling around in it, and the rest of the exhaust was still stock.... Current car has about the same setup as Jeremy's, 2" with an opened up toilet bowl, and it does sound damn good.. Only complaint is the drone on the highway.. I'm debating about installing 2 glass packs next time around.. One under the floor where the resonator would go, and one in the standard location.. That should be just enough to be tolerable for me...
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Cherry bomb, cheapest glass pack you can buy I'm sure. ie. $30. lol
I have mine in between the down pipe and the shifter on my car, even with leaks the sound still comes out the tail pipe behind my rear driver tire. Don't have much in car noise, im sure if it were a completely sealed exhaust it would sound pretty quiet in car.
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ok, well idk what was up with my car, but it was LOUD!!
the 4-1 header did not help out noise levels..
the only time my n/a sounded stock, was at idle.. and you could still tell it had pipes..
my car was rappin by 1750rpms.. not even joking.
i had a header, and a straight pipe back to a no-name red glass pack, with a foot or so of tail pipe.. it was FUGGIN LOUD!!
there was no "nice sounding" about my exhaust system.. my passengers and i would always giggle about the pipes tho, so it was honestly worth it..
would i do it again? HELL NO!
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We must have had the same red no name glass pack.. I'm sure having a header made things worse too.. The glass pack I have now (dunno what brand it is to be honest) is about twice the diameter of the red things, and most definitely made of a heavier gauge steel...
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Yeah, as mentioned, my glasspack equipped car is very quiet, but it's also running through a muffler. I'm not getting any raspiness or droning at all.
About the soot issue.... I can see that happening with a perforated cored resonator (or muffler) but the louvered styles should fare better. The louvers should direct the soot away from the packing. Even if not, my resonator was cheap enough that a replacement every few years wouldn't be an issue.
-Todd
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Yeah, as mentioned, my glasspack equipped car is very quiet, but it's also running through a muffler. I'm not getting any raspiness or droning at all.
About the soot issue.... I can see that happening with a perforated cored resonator (or muffler) but the louvered styles should fare better. The louvers should direct the soot away from the packing. Even if not, my resonator was cheap enough that a replacement every few years wouldn't be an issue.
-Todd
well, being that a RESONATOR is HOLLOW, they should not clog with soot..
glass packs go THUD when you tap them with a metal object.
resonators, or blown out glass packs, go TINK when you tap them with a metal object..
and yes Brett, im sure we had the same glass packs. did yours almost make your ears ring too? mine was louder than any fart-can-equipped honda ive ever heard..
and it wasnt that raspy loud like a honda, it had a CRACK to it..
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well, being that a RESONATOR is HOLLOW, they should not clog with soot..
You are correct. I mistakenly wrote resonator, when I meant glasspack; I do know the difference. For some reason, I referred to mine as a glasspack, and a resonator in the same post.
-Todd
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Mine definitely has a crack to it, its sounds GODLY. Like an old 6V92 when i get on it.
http://www.youtube.com/watch?v=dVjXwS8HzFw
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and yes Brett, im sure we had the same glass packs. did yours almost make your ears ring too? mine was louder than any fart-can-equipped honda ive ever heard..
and it wasnt that raspy loud like a honda, it had a CRACK to it..
That would be the sound.. It was for 2" pipe, and diameter at the fattest part was only maybe 3" - 4" I guess that's what you get for a $10 glass pack.. The one I have now is also for 2" pipe, but is 5" - 6" at the fattest part.. Impressive how much difference there is...
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Hi Guys,
On my 82 Caddy 1.6NA
I ran stock gasser Bosal exhaust (needed the extra $$ for other parts) and the truck had a new Bosal muffler and tail pipe on it,when I bought it.
No resonator in the system.
The Bosal muffler is center inlet and center outlet style oval shaped muffler.
So,I marked tail pipe orientation-then cut the tail pipe off- stuck a hole saw with extension in the muffler outlet and drilled thru the center baffle.
Now you can see right thru the muffler-inlet to outlet !
Then mig welded tailpipe back on.
The whole procedure took about 1-1/2 hours.
Made a nice difference in the power with a nice sounding exhaust !
No droning and quiet with windows up.
I'm a happy camper !
Total cost for exaust was under $75 (because I had the new muffler and tailpipe)
Mike
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if you drilled a hole in your muffler, its not still quiet.. or else you havent had it above 3k rpms with the new exhaust..
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I don't know, mine is pretty much a hole through the middle, and its quieter above 3000 than below.
(http://www.moroso.com/catalog/images/94050_group.jpg)
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I also did the hole saw thing on my buddies powerstroke, and it's not notably loud.
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I don't know, mine is pretty much a hole through the middle, and its quieter above 3000 than below.
(http://www.moroso.com/catalog/images/94050_group.jpg)
I like this resonator design, the Moroso spiral flow, it seems it's called.
Edit: doesn't seem to be available in enough sizes, I'd need 2 inch. Looks like a turbo with glasspack is still the best solution.
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thats a moroso spiral flow muffler.. its not a resonator, or a glass pack, but a welded muffler.. they are awesome..
we have a pair on our aluminum tube frame sand rail (500+ hp corvette 327 powered) and they are very pleasant at idle.. but once you get on it, you can definitely tell they are an OPEN muffler..
im sure on a TD they sound REALLY good..
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Believe it or not,It's not actually loud )probably because of the stock size pipes)
And I've only had it over 3500RPM 2X--when I missed a shift going into 5th entering the highway.(dumped into 3rd) With the gov mod-holy crap ! The exhaust was the last thing on my mind ! Redlined pretty damn quick-but didn't come apart. I had replaced all the shifter bushings and ball,but the adjustment wasn;t quite right.
You bet I adjusted that correctly,after that mishap.
Mike
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I have my governor modified, with it fully shimmed. I take the sum*** up past 5k every single time i drive it ;) LOVE IT. Sounds sooo good, I'll have to post a video.
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ok, well, idk whats wrong with your guys's cars, but mine was OBNOXIOUSLY loud.. and im a kid.. i like loud. and it was too loud for me..
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Probably had exhaust leaks and/or the exhaust didn't exit from under the vehicle..
I'm sorry but even my v8 straight off the long tubes wasn't too loud for me..
Kev ya just a kittykatt