I may go check out this IROC...
#151
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Re: I may go check out this IROC...
I hear ya...we lost power in the snowstorm Saturday night, and won't have it back before Friday or Saturday Been bouncing from house to house just to do simple things like eat and shower!
It'll all be worth it in the end for you, I'm sure. I assume it has a 3 bay garage? I wanna see pics of all 3 in there together!
It'll all be worth it in the end for you, I'm sure. I assume it has a 3 bay garage? I wanna see pics of all 3 in there together!
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Re: I may go check out this IROC...
From what I can see, you got a good one! If that's original paint, a few chips and blemishes are to be expected, looks great overall. Like you say, I'd do some minor touch ups and leave it original as possible. I wish I could find one like it at a reasonable price. I'm somewhat jealous but at the same time happy that someone who can appreciate the car got it.
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Re: I may go check out this IROC...
I see you are afflicted with the same issue my 88 TA has...darkened-front-bumper-itis Supposedly flex additive darkens paint over time...I imagine the nose was sprayed at one point, and its darkened over time?
I love that car...seriously. Nice find Lemme know if you would ever consider trading it for a nice Trans Am
AND...welcome to the Three Third Gen Owner Club!
I love that car...seriously. Nice find Lemme know if you would ever consider trading it for a nice Trans Am
AND...welcome to the Three Third Gen Owner Club!
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Car: 1989 IROC-Z. Original owner
Engine: LB9. Dual Cats. Big Cam
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Axle/Gears: BW 3.45
Re: I may go check out this IROC...
I see you are afflicted with the same issue my 88 TA has...darkened-front-bumper-itis Supposedly flex additive darkens paint over time...I imagine the nose was sprayed at one point, and its darkened over time?
I love that car...seriously. Nice find Lemme know if you would ever consider trading it for a nice Trans Am
AND...welcome to the Three Third Gen Owner Club!
I love that car...seriously. Nice find Lemme know if you would ever consider trading it for a nice Trans Am
AND...welcome to the Three Third Gen Owner Club!
I'm still 50/50 on what I'm going to do with my '83. I'll decide by spring time.
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Re: I may go check out this IROC...
From what I can see, you got a good one! If that's original paint, a few chips and blemishes are to be expected, looks great overall. Like you say, I'd do some minor touch ups and leave it original as possible. I wish I could find one like it at a reasonable price. I'm somewhat jealous but at the same time happy that someone who can appreciate the car got it.
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Re: I may go check out this IROC...
With respect to 5th gens? I'm having way more fun spending less on 3 thirds...you too??
#157
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Re: I may go check out this IROC...
Keep it...seriously. You and I both know you derive a lot more enjoyment from it than what you'd receive back from selling it. If you were bored with it, that's one thing. I was bored with my RS. Something tells me you aren't bored with the '83
With respect to 5th gens? I'm having way more fun spending less on 3 thirds...you too??
With respect to 5th gens? I'm having way more fun spending less on 3 thirds...you too??
I guess I've gotten the Crossfire thing out of my system, and now the yellow IROC thing, and if I'm ever going to get the T5/LB9 convertible thing out of my system, one of these bad boys is going to have to go. I'll mull it over until spring. But I can see myself going through ebay/CL/Autotrader withdrawal pretty soon!
Last edited by chazman; 11-02-2011 at 01:23 PM.
#160
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Re: I may go check out this IROC...
From one 85 IROC-Z owner to another, CONGRATS! That thing looks very good. I had to fix a few paint chips on mine when I got it because it sat under a tree all winter, but once you fix them up youll be surprised how nice it looks.
Also depending on how much you drive it, expect some more chips. Thats one drawback to single stage paint, its fragile. But hey, its better than clearcoat peeling like a lot of the 86's I see.
Have fun with it and post some interior pics when you can!
Also depending on how much you drive it, expect some more chips. Thats one drawback to single stage paint, its fragile. But hey, its better than clearcoat peeling like a lot of the 86's I see.
Have fun with it and post some interior pics when you can!
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Re: I may go check out this IROC...
It's not... The correct GM pipes aren't wrinkle crunched. They're not quite mandrel bent either, but they don't have the visible folds in the pipe. Also the stock tail pipes are angle cut with a flat across the back. The exhaust pipes were also welded to the muffler from the factory, not clamped.
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Re: I may go check out this IROC...
These look like the correct tailpipes but on an aftermarket muffler.
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Re: I may go check out this IROC...
From one 85 IROC-Z owner to another, CONGRATS! That thing looks very good. I had to fix a few paint chips on mine when I got it because it sat under a tree all winter, but once you fix them up youll be surprised how nice it looks.
Also depending on how much you drive it, expect some more chips. Thats one drawback to single stage paint, its fragile. But hey, its better than clearcoat peeling like a lot of the 86's I see.
Have fun with it and post some interior pics when you can!
Also depending on how much you drive it, expect some more chips. Thats one drawback to single stage paint, its fragile. But hey, its better than clearcoat peeling like a lot of the 86's I see.
Have fun with it and post some interior pics when you can!
#164
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Re: I may go check out this IROC...
85 IROC's had 3.23 gears standard on the 10 bolt and if you ordered the G92 package you got 3.42 gears. Since you have a one wheel wonder with drum brakes my guess is you do not have the G92 and have the 3.23 gears.
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Re: I may go check out this IROC...
It's not... The correct GM pipes aren't wrinkle crunched. They're not quite mandrel bent either, but they don't have the visible folds in the pipe. Also the stock tail pipes are angle cut with a flat across the back. The exhaust pipes were also welded to the muffler from the factory, not clamped.
Good to know.
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Car: 1989 IROC-Z. Original owner
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Re: I may go check out this IROC...
It's got a GU6 code which = 3.42. GU5 = 3.23.
I've heard that Z28 LB9 got the 3.23 and IROC-Z LB9 got the 3.42 in '85.
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Re: I may go check out this IROC...
The dark bands around the tail pipes are dead give aways... They're from the paper bands with the part numbers that Walker and other exhaust manufacturers use.
These are both stock muffler assemblies. The rusted out intermediate pipe is original too, from my 86 Trans Am (177k miles). The slash cut tips were standard up until 90 or 91 when they switched to the turn down style. Incidentally, the muffler on the 86, 91, and the 93-97 muffler I have on my Formula now all have the GM logo and the same part number stamped in the case. The new intermediate pipe in the pic is a Walker/Dynomax piece. It's close enough to the stock pipe to be easily mistaken for one.
These are both stock muffler assemblies. The rusted out intermediate pipe is original too, from my 86 Trans Am (177k miles). The slash cut tips were standard up until 90 or 91 when they switched to the turn down style. Incidentally, the muffler on the 86, 91, and the 93-97 muffler I have on my Formula now all have the GM logo and the same part number stamped in the case. The new intermediate pipe in the pic is a Walker/Dynomax piece. It's close enough to the stock pipe to be easily mistaken for one.
Last edited by Drew; 11-02-2011 at 09:34 PM.
#168
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Re: I may go check out this IROC...
Interesting, 3.42 gears without the G92 package. Not sure I have seen one of those before. But I guess it is possible since you are currently looking at it.
#169
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Re: I may go check out this IROC...
I am in no way a Camaro expert...I have only been lurking here for a few months, but didnt G92 appear with the introduction of the L98? Dont recall any 82-86 with a G92 code.
And for the record I have a fuly loaded 85 IROC-Z LB9 auto with the GU6 3.42 gears also.
And for the record I have a fuly loaded 85 IROC-Z LB9 auto with the GU6 3.42 gears also.
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Re: I may go check out this IROC...
Interesting, they looked just like the GM parts. So, it's probably not worth an hour drive to pick up those tail pipes?
#171
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Re: I may go check out this IROC...
G92 doesn't have anything to do with a specific gear ratio. It just indicates a "performance gear ratio". The G92 option was around in the earlier years it just didn't gain notoriety for being the option that distinguishes the high output vs low output 305. Plenty of 6cyl thirdgens had 3.42 gears without the G92 code.
I wouldn't go out of my way for stock style tail pipes. Walker/Dynomax replacements are cheap and easy to find. Just go to the Walker website and look up the application in the online catalog. Then take the number from the catalog and search for it at Summit or the website for your preferred discount auto store.
I wouldn't go out of my way for stock style tail pipes. Walker/Dynomax replacements are cheap and easy to find. Just go to the Walker website and look up the application in the online catalog. Then take the number from the catalog and search for it at Summit or the website for your preferred discount auto store.
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Re: I may go check out this IROC...
I have an '85 Motor Trend road test comparing an L69 IROC to a Mustang SVO...obviously comparing "old tech" and "new tech." In a sidebar, they talk about the new LB9/700R combo. The only available ratio listed is the 3.42 gear.
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Re: I may go check out this IROC...
if your just looking for the tail pipes without muffler, i have a set from my 85 berlinetta. i replaced my whole exhaust with an oem replacement, but out of my old exhaust, i cut off the tail pipes in case my new ones werent exact to the originals. but they were, and i dont need these pipes. the muffler was rotted so its gone. if i remember right, they had some flash rust but i wire wheeled it clean.
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Re: I may go check out this IROC...
I wouldn't go out of my way for stock style tail pipes. Walker/Dynomax replacements are cheap and easy to find. Just go to the Walker website and look up the application in the online catalog. Then take the number from the catalog and search for it at Summit or the website for your preferred discount auto store.
What say you?
Last edited by chazman; 11-03-2011 at 11:33 AM.
#177
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Re: I may go check out this IROC...
It looks like the stock replacement tail pipes from Walker (43988 & 43989) are crush/crimp bent. 43244 & 43243 are mandrel bent like the stock HO pipes, but they're 2.5" instead of 2.25". The cut on the tips might not be exact either, but they could probably be modified to look about right, assuming they're long enough.
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Re: I may go check out this IROC...
It looks like the stock replacement tail pipes from Walker (43988 & 43989) are crush/crimp bent. 43244 & 43243 are mandrel bent like the stock HO pipes, but they're 2.5" instead of 2.25". The cut on the tips might not be exact either, but they could probably be modified to look about right, assuming they're long enough.
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Re: I may go check out this IROC...
Edelbrock USED to have a stock appearing catback. Then they went to ridiculous huge chrome tips and a different muffler. They don't even offer the RPM series muffler (crossflow) that they used to make for our cars. It sucks, I've got the old style cat-back on the Iroc. It's got a lifetime warranty, but what would they replace it with? lol.
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Re: I may go check out this IROC...
I'm praying my OEM exhausts on the '88 pair last as long as possible...especially on the IROC. I know there's no way they'll last forever. I have a stock replacement on my 86, and because its not OEM I've been fiddling with the idea of swapping it out for something throatier. My RS just got so loud with the Magnaflow on it...especially with headers.
People say headers don't add to exhaust noise...I don't see how that's possible...
People say headers don't add to exhaust noise...I don't see how that's possible...
#186
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Re: I may go check out this IROC...
I wouldn't worry about it too much... Several of my thirdgens still had the stock exhaust systems at 60-70k miles. My Formula is over 120k miles and still has 75% of the original exhaust, the other 25% is LT1 4th gen take off. It shows no signs of rusting out. The holy exhaust I posted pics of earlier came off my 86 Trans Am at 170k miles! They tend to rust out in the bends when they start to go.
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Re: I may go check out this IROC...
my 87 iroc still wears the original exhaust pipe with the cat, the only thing that was added was a flowmaster and i really like the way it sounds. its got 125,000 on it must say im thinking of removing the cat cause it rattles alot and i dnt have smog test here either.
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Re: I may go check out this IROC...
I'm praying my OEM exhausts on the '88 pair last as long as possible...especially on the IROC. I know there's no way they'll last forever. I have a stock replacement on my 86, and because its not OEM I've been fiddling with the idea of swapping it out for something throatier. My RS just got so loud with the Magnaflow on it...especially with headers.
People say headers don't add to exhaust noise...I don't see how that's possible...
People say headers don't add to exhaust noise...I don't see how that's possible...
It's a slippery slope. I spent a literal buttload of money on my '83's exhaust searching for that perfect tone. I had a renowned exhaust shop in my area custom bend 2.25", into a 3" Y pipe, 3" inch Catco high flow cat, 3" intermediate pipe, Flowmaster (against my better judgement), and 2.5" stock looking tail pipes. Sounded great on the outside, unbearable on the inside. So I had the shop replace the Flowmaster with some OEM replacement muffler. Better on the inside, but too quiet on the outside. When I put on a set of L69 exhaust manifolds it improved. You have to appreciate the efforts that OEM engineers put into factory systems.
Moral of the story. Before you spend ~ 1400 bucks fiddling with an exhaust, think twice about dumping a factory system. If I had it to do over, I'd probably just put a "test pipe" in place of it's clogged cat and call it a day.
For the '85, I just want to find a new or almost new OEM muffler and tail pipe assembly for it. A local guy, who also is here on TGO, replaced the muffler on his 20K mile, L69, IROC with a GMPP system. I inquired about buying the stock piece from him, be he apparently disposed of it.
Last edited by chazman; 11-05-2011 at 10:05 AM.
#191
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Re: I may go check out this IROC...
It's a slippery slope. I spent a literal buttload of money on my '83's exhaust searching for that perfect tone. I had a renowned exhaust shop in my area custom bend 2.25", into a 3" Y pipe, 3" inch Catco high flow cat, 3" intermediate pipe, Flowmaster (against my better judgement), and 2.5" stock looking tail pipes. Sounded great on the outside, unbearable on the inside. So I had the shop replace the Flowmaster with some OEM replacement muffler. Better, but too quiet. When I put on a set of L69 exhaust manifolds it improved.
Moral of the story. Before you spend ~ 1400 bucks fiddling with an exhaust, think twice about dumping a factory system. If I had it to do over, I'd probably just put a "test pipe" in place of it's clogged cat and call it a day.
For the '85, I just want to find a new or almost new OEM muffler and tail pipe assembly for it. A local guy, who also is here on TGO, replaced the muffler on his 20K mile, L69, IROC with a GMPP system. I inquired about buying the stock piece from him, be he apparently disposed of it.
Moral of the story. Before you spend ~ 1400 bucks fiddling with an exhaust, think twice about dumping a factory system. If I had it to do over, I'd probably just put a "test pipe" in place of it's clogged cat and call it a day.
For the '85, I just want to find a new or almost new OEM muffler and tail pipe assembly for it. A local guy, who also is here on TGO, replaced the muffler on his 20K mile, L69, IROC with a GMPP system. I inquired about buying the stock piece from him, be he apparently disposed of it.
All that I know is since that car, I too am neurotic to touch an exhaust for fear of hating it. The only one I trust that's made for these cars is Borla, and its nowhere near stock looking. I wish SLP still made catbacks for these cars...I love the "2OTL" on my Z28.
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Re: I may go check out this IROC...
So, today was the first time I had a chance to spend a little time with the car, it's still in storage and I don't have a garage yet. This car is going to be a bit more of a project than I had expected, (so what else is new).
Biggest thing that bugs me, is the howling fuel pump. It howls like an air raid siren. Better after I filled it up, but no way will I tolerate that noise. The previous owner told me it was a new pump - so what gives?
Everything that moves on this car needs to be lubed. The door lock key got stuck in the lock, took me about 5 minutes of fiddling to get it out. Afew more door dings on the driver's door that I noticed. The power door locks, power mirrors and interior dome lights don't work. Wonder if they are on a common fuse? The temp gauge gets stuck and the oil pressure gauge seems to read a little on the low side. One of the fog lights doesn't work, as well as it's indicator light on the interior switch. Pretty sure I need to adjust the TV cable too and bleed the brakes. I've got a REALLY annoying exhaust rattle too. And that replacement muffler needs to go, the car has the exhaust note of a Buick.
I did have a chance to take it to a car wash and power wash afew pounds of dirt off the indercarriage though. Literally!
After spending about an hour with the car today, it seems to me that this was used unsympathetically as a daily driver for the first 36,000 miles of it's life, then left to sit for over a decade, then driven sparingly for the last few years. I can't wait to start working on it though. The only thing which really worries me right now is that darned fuel pump.
Biggest thing that bugs me, is the howling fuel pump. It howls like an air raid siren. Better after I filled it up, but no way will I tolerate that noise. The previous owner told me it was a new pump - so what gives?
Everything that moves on this car needs to be lubed. The door lock key got stuck in the lock, took me about 5 minutes of fiddling to get it out. Afew more door dings on the driver's door that I noticed. The power door locks, power mirrors and interior dome lights don't work. Wonder if they are on a common fuse? The temp gauge gets stuck and the oil pressure gauge seems to read a little on the low side. One of the fog lights doesn't work, as well as it's indicator light on the interior switch. Pretty sure I need to adjust the TV cable too and bleed the brakes. I've got a REALLY annoying exhaust rattle too. And that replacement muffler needs to go, the car has the exhaust note of a Buick.
I did have a chance to take it to a car wash and power wash afew pounds of dirt off the indercarriage though. Literally!
After spending about an hour with the car today, it seems to me that this was used unsympathetically as a daily driver for the first 36,000 miles of it's life, then left to sit for over a decade, then driven sparingly for the last few years. I can't wait to start working on it though. The only thing which really worries me right now is that darned fuel pump.
Last edited by chazman; 11-13-2011 at 07:51 PM.
#193
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Re: I may go check out this IROC...
My 88 TA's pump howls, too. Its quiet as new when started cold, but run it for 30 minutes or more, and it howls good. I've also noticed at 1/8 of a tank it starts stuttering...fill it up and its fine. Fuel starvation from a hot pump, I'd guess?
I'm debating if its worth it to cut the damn OEM exhaust off to replace the pump. At this point, I don't feel it is...I've seen them howl for YEARS before going bad. At the same point, how much do I trust the pump for a long ride?
I don't know what to do.
I'm debating if its worth it to cut the damn OEM exhaust off to replace the pump. At this point, I don't feel it is...I've seen them howl for YEARS before going bad. At the same point, how much do I trust the pump for a long ride?
I don't know what to do.
#194
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Re: I may go check out this IROC...
I "think" the power door locks are on another fuse with the rear window defogger. That one should be a 35 amp fuse. Not sure the cause of this one.
That's what I remember off the top of my head.
Last edited by burnout88; 11-13-2011 at 10:12 PM.
#195
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Re: I may go check out this IROC...
The stock pumps are usually in a rubber sleeve that insulates them from the hanger/tank and the straps/tank are insulated with rubber. If the rubber is omitted you can get more noise. The other thing to consider is that the design of the pump may be different then the OEM pump, leading to increased noise.
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Car: 1989 IROC-Z. Original owner
Engine: LB9. Dual Cats. Big Cam
Transmission: World Class T-5
Axle/Gears: BW 3.45
Re: I may go check out this IROC...
The dome lights and cig lighter are on a common fuse. It is the 20 amp accessory fuse. Generally, when the interior lights do not work it is the cig lighter that is causing the fuse to pop. The best option is to unplug the plug on the back of the cig housing and install a new fuse. Then replace the cig housing. Also, could be the horn button shorting out.
I "think" the power door locks are on another fuse with the rear window defogger. That one should be a 35 amp fuse. Not sure the cause of this one.
That's what I remember off the top of head.
I "think" the power door locks are on another fuse with the rear window defogger. That one should be a 35 amp fuse. Not sure the cause of this one.
That's what I remember off the top of head.
#197
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Car: 1989 IROC-Z. Original owner
Engine: LB9. Dual Cats. Big Cam
Transmission: World Class T-5
Axle/Gears: BW 3.45
Re: I may go check out this IROC...
The stock pumps are usually in a rubber sleeve that insulates them from the hanger/tank and the straps/tank are insulated with rubber. If the rubber is omitted you can get more noise. The other thing to consider is that the design of the pump may be different then the OEM pump, leading to increased noise.
#198
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Car: 1988 GTA
Engine: LB9
Transmission: T5
Axle/Gears: 3.45
Re: I may go check out this IROC...
An aftermarket replacement pump will be louder than the OE pump. It would suck to change it and end up with the same result.
#199
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Re: I may go check out this IROC...
The owners manual, or Service Manual, maybe both have a page that explains which circuits are controlled by which breaker/fuse. That's a quick way to identify the source of a cluster of problems.
The stock muffler can be removed without cutting... Just have to get the slip joint dull red hot with oxy/acetylene and work it off the intermediate pipe.
The stock muffler can be removed without cutting... Just have to get the slip joint dull red hot with oxy/acetylene and work it off the intermediate pipe.