ultrataco

iTrader: (2)

I was told by the previous owner that he installed a glass pack. there are some problems with the exhaust (see link), and i'm going to (eventually) replace the cat back system. I have read that glass packs are bad (melt), and I thought it might have caused the problems (maybe?). I might replace it if I knew what it was.

Would a glass pack go where a presilencer would (between down pipe and y-pipe)?

If I do have a glass pack, the inside of it would have melted long before I got the car. Should it be a high priority to replace it, or will it be ok to just leave it till I can afford?

I know the melt, but does a melted glass pack cause any problems?

some pics of my exhaust are here:
https://www.rx7club.com/2nd-generation-specific-1986-1992-17/good-aftermarket-exhaust-557687/

ultrataco

iTrader: (2)

and how do i find out if i have a glass pack?

prjct87rx7

iTrader: (7)

a glass pack i think is a resonator type thingy thought it was for v8's tho

NOPR

wont hurt anything if its melted. best thing to do is cut the muffler/presilencer open and replace the fiberglass with high quality stainless steel wool, then weld the muffler shut.

longsword

a glasspack is a type of exaust sound improvement. it makes your car louder. there are several types of glasspack mufflers that you can buy. if you buy a highqualty one it will work just fine and will not melt. i personally have one on each end of my pipes and they have never melted even after raceing. they do make glasspacks that connect directly to your header but i do not reccomend them.
the glasspack unless the installer was stupid, would not go where the presilencer is, but if it was put there it would have melted. melting could cause a problem depending on the way it melts.

a glasspack looks like this
http://www.jegs.com/webapp/wcs/store...tegoryId=13841

NOPR

tell me about it! too bad apex'i is stupid and did that with my exhaust . it has gotten noticeably louder over time.

longsword

ouch, that does suck.
does that stainless steel wool thing really work aswell as fiberglass?

liv

you should just take it off and replace it with a pipe it will sound 20x better

MaczPayne

iTrader: (5)

My 86 sport came with a pair of glasspack mufflers.. It's not very loud...

I still need a new exhaust system, since I have leaks. I can hear the engine under my seat.

ultrataco

iTrader: (2)

exactly.

ultrataco

iTrader: (2)

well, i think i may just replace the y-pipe and mufflers. I may replace the glass pack (if it is indeed a glass pack) later. The exhaust has a lot of custom parts, but I don't know what. I'm hoping a new cat back system will just bolt onto the alleged glass pack.