2nd Generation Specific (1986-1992) 1986-1992 Discussion including performance modifications and technical support sections.

im thinking dual glasspacks perhaps?

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Old 11-27-03 | 09:31 AM
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im thinking dual glasspacks perhaps?

what do u guys think about going dual cherry bomb glasspacks, i lie the straight through design but im not sure if it'll sound good on a 7
Old 11-27-03 | 09:36 AM
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cherrybombs are ricer stuff... only cars I have seen them on are hondas...
Old 11-27-03 | 10:20 AM
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well then forget the cherry bombs what about plain dual glasspacks
Old 11-27-03 | 10:30 AM
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Are you looking for performance or crappy ricer sound here?
Old 11-27-03 | 10:39 AM
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I'm pretty sure that the rotary engine's exhaust pulses will blow the packing out of a glass pack.

And it will probably sound like crap, or more like a pissed off swarm of bee's going down the highway.

You could try it and tell us what you think of it, but I would just use muffler with baffleing.
Old 11-27-03 | 11:37 AM
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On a Non turbo, glass pack mufflers life can often be measured in hours or days.

I would avoid any sort of glass pack on a non-turbo
Old 11-27-03 | 06:31 PM
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i was just wondering because my friend just put a set on his 85 rx-7
Old 11-27-03 | 06:49 PM
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I had them. They sounded good for a day, then started going downhill. Within 4 days, the packing was completely gone. What a waste.
Old 11-28-03 | 08:17 AM
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i have glass packs (cherry bombs) on a 90 rex i bought a few months ago an i have already gottn 2 tickets for "faulty mufflers". they are loud as hell!! do you like hearing your stereo on the interstate ??
Old 11-28-03 | 08:45 AM
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What about you using a glasspack as a presilencer? I have 3 inch piping from the cat back and just some generic straight through muffler but its loud even at idle and was thinking about using a glasspack as a presilencer.
Old 11-28-03 | 10:39 AM
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On TornAcl90RX7 his loudness is probably from them being burnt out.

On olliecup, if a glasspack burns out as a muffler 5ft back from the engine, how long do you think it will last if it is 2 or 3 feet from the engine? maybe an hour or two?
Old 11-28-03 | 11:12 AM
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Originally posted by olliecup
What about you using a glasspack as a presilencer? I have 3 inch piping from the cat back and just some generic straight through muffler but its loud even at idle and was thinking about using a glasspack as a presilencer.
Thats exactly how I had mine. They DO NOT last. If you want a presilencer, get something SS or ceramic packed. If youre on a tight budget, the Dynomax Race Magnum welded and bullet mufflers at jegs are ceramic packed, as are the Hooker Maxflow mufflers. Magnaflows cost a bit more, but are all SS.
Old 12-01-03 | 05:15 PM
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My NA had all steel "turbo pack" silencers with glass pack bombs at the back.
Glass will melt in the silencer (ex-cat) location but holds up OK back at the end.
Check out the pictures & sound clip links in my sig below.
Old 12-01-03 | 05:37 PM
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My NA has dual glasspacks of some sort... I'm not sure which kind... but it only sounds slightly ricey below 3k... after 3k it sounds like a small airplane.


EDIT: Mine sounds WAY smoother than that guy's. Mine does not cackle or pop.

Last edited by truespin88; 12-01-03 at 05:40 PM.
Old 12-01-03 | 06:36 PM
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Originally posted by truespin88
Mine sounds WAY smoother than that guy's. Mine does not cackle or pop.
I'm guessing you are runnung the stock "iron box" exhaust collector.
Mazda designed it to detune & soften the sound.

Headers make loud control more of an issue.
Those pops are visible flames at night..
Old 12-01-03 | 07:04 PM
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ok whats the difference between glasspacks and the straight through muffler?

it seems a lot of aftermeket mufflers are straight through design but ppl would love to get there hands on them but when it comes to glasspacks everyone calls rice

also glasspacks where put a lot of times on old hotrods please don't tell me a 64 GTO with a setup of glasspacks on it is rice.


but yes I agree packing won't last long on glasspacks

and
Old 12-01-03 | 07:15 PM
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Apexi makes a decent dual package. I have an RB street header w/ a pre-silencer and N1 duals. Without the baffles that get inserted into the ends of the mufflers my N/A is LOUD!, but with the inserts I can listen to the stereo fine. The whole system is straight through and its designed to hold up to the 13b's high temps.
Old 12-01-03 | 09:02 PM
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Sureshot: Yes I'm still using the stock manifold box. I don't have the cash for a header and presilencer just yet.
My exhaust is not stock, however, as I have noticed most of it is welded slipfit piping and I think the stock exhaust on most Japanese cars (in my experience) is bolted together, usually in sections.
Old 12-01-03 | 09:13 PM
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also glasspacks where put a lot of times on old hotrods please don't tell me a 64 GTO with a setup of glasspacks on it is rice.

Because most of the time you see glass packs (or at least when I see them), they are on like CRX's, and they sound like **** because the engine doesn't have the exhaust to use a muffler that is that big, and flows that much.

But the rotary will keep up with it, just like a V8 will to. When you have the exhaust to use a bigger, better flowing muffler. It sounds better.

But the rotary already sounds like a jetson's car, and this will just amplify that
Old 12-01-03 | 09:19 PM
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i have one very long word in reply with topic, NOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOO OOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOO OOOOOOOOOOOOOOOOOOOO!!!!!!!!!!!!!!!!!!!!!
Old 12-02-03 | 01:13 AM
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Cory Simpson

that is why you buy different size glasspacks




and why is it that everyone says no glasspacks will sound like ***? you can get them with stainless packing for reliability


but let me ask you this
what is the difference between one of those vs the apexi N1?
Old 12-02-03 | 01:28 AM
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Originally posted by Mephis
i have one very long word in reply with topic, NOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOO OOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOO OOOOOOOOOOOOOOOOOOOO!!!!!!!!!!!!!!!!!!!!!
AND MY REPLY WOULD ALSO BE NOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOO OOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOO OOOOOOOOOOOOOOOOOOOOOOOO!!!!!!!!!!!!!!!!!!!!!!!!!! !!!!!PLEASE NOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOO OOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOO OOOOOOOOOOOOOOOOOOOOOOOO!!!!!!!!!!!!!!!!!!!!!!!!!! !!!!! GOD WHYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYY YYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYY!!!! !!!.man they make plenty of mufflers out there, i know glass packs are cheap but they will make your car sound like **** and people will look at your car that way.i just ordered a pair of draggers for my seven do somthing like that.
Old 12-02-03 | 02:17 PM
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Glasspack mufflers are OK and will give you a nice raspy sound on a turbo II with a primary cat and downpipe (turbo II) or partial headers on an NA. If you remove the collector & go full headers or straightpipe, it will attract every cop in town.

I believe traditional glasspacks won't work without being destroyed by the higher heat output of a rotary engine.
Old 12-02-03 | 02:43 PM
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Originally posted by Mephis
i have one very long word in reply with topic, NOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOO OOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOO OOOOOOOOOOOOOOOOOOOO!!!!!!!!!!!!!!!!!!!!!



rotfl

anyway, this is good stuff to know. Late winter I will be removing the precats and main cat from my n/a and runnning stock mufflers.. I like to do the direct OPPOSITE of ricers.. they get catbacks, I get everything BUT that.
Old 12-02-03 | 03:08 PM
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if you want to go full headers (no collector) & a fully open exhaust, Racing Beat is the ONLY way to go for a tollerable noise level & exhaust note. Their full end to end exhaust system comes with a pre-silencer and high flow good muffling mufflers.

It looks, sounds, & performs MUCH!!!! better than OEM. Lots of eye candy on the molded, engraved, & polished exhaust tips as well.



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