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1987 IROC-Z convertible. Are 4 IROCs too many?

Old 06-01-2017, 12:09 PM
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Re: 1987 IROC-Z convertible. Are 4 IROCs too many?

I've been meaning to try this stuff. This could be the time.


http://www.detailking.com/store-home...dyes-and-kits/



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Old 06-01-2017, 10:46 PM
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Re: 1987 IROC-Z convertible. Are 4 IROCs too many?


Front seats came out pretty nice.

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Old 06-02-2017, 07:48 AM
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Re: 1987 IROC-Z convertible. Are 4 IROCs too many?

I have taken care of bleached spots in and SUV, and worn spots in my Firebird with spray paint. Yes, you read that right. The trick is getting the right color, It does not "fix" the problem, but it covers it up pretty well. Black is easy, Gray is kind of hit or miss, but the tan would be a hard one to match.

What I did was clean the carpet, vacuum, use a green machine etc... (let dry if you steam clean.) Then once that is done spray the area with some paint, Try NOT to be liberal with the paint, add more if required as it is harder to remove than add some, just a little bit is all you usually need, Let it dry for about 15 min, then scrub it with a finger nail brush like this one...

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Old 06-02-2017, 08:34 AM
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Re: 1987 IROC-Z convertible. Are 4 IROCs too many?

Originally Posted by okfoz View Post
I have taken care of bleached spots in and SUV, and worn spots in my Firebird with spray paint. Yes, you read that right. The trick is getting the right color, It does not "fix" the problem, but it covers it up pretty well. Black is easy, Gray is kind of hit or miss, but the tan would be a hard one to match.

What I did was clean the carpet, vacuum, use a green machine etc... (let dry if you steam clean.) Then once that is done spray the area with some paint, Try NOT to be liberal with the paint, add more if required as it is harder to remove than add some, just a little bit is all you usually need, Let it dry for about 15 min, then scrub it with a finger nail brush like this one...

Thanks John. I actually had some SEM paint I tried last night. It worked pretty well on restoring the faded hump, but not so much on the thread worn spots. I'll circle back to this later, I guess.
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Old 06-02-2017, 09:11 AM
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Re: 1987 IROC-Z convertible. Are 4 IROCs too many?

Still getting to know it....


Voltmeter really goes down, like to 9-ish volts with AC on. Looks like it already has a new alternator.

And some sort of slight knocking/ticking coming from engine compartment. Stuck lifter? I wouldn't be surprised if the gas is a couple years old.



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Old 06-02-2017, 09:26 AM
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Re: 1987 IROC-Z convertible. Are 4 IROCs too many?

Also, I'd better start thinking about a lift if I want to bring the yellow one home to be with his brothers.....
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Old 06-02-2017, 09:41 AM
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Re: 1987 IROC-Z convertible. Are 4 IROCs too many?

Still has all 4 gray, factory valve caps.
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Old 06-02-2017, 12:12 PM
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Re: 1987 IROC-Z convertible. Are 4 IROCs too many?

My lift is finally in Orlando. I pick it up early next week.

The voltmeter was doing the same on my car and I kept replacing the alternator until I decided to test with a voltmeter. The gauge was dropping to 8 or 9 volts, but the voltmeter remained at 13V. I replaced the gauge and all is well again.
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Old 06-02-2017, 01:44 PM
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Re: 1987 IROC-Z convertible. Are 4 IROCs too many?

Originally Posted by scottmoyer View Post
My lift is finally in Orlando. I pick it up early next week.

The voltmeter was doing the same on my car and I kept replacing the alternator until I decided to test with a voltmeter. The gauge was dropping to 8 or 9 volts, but the voltmeter remained at 13V. I replaced the gauge and all is well again.
Thanks Scott. BTW, just PM'd you my VIN.
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Old 06-02-2017, 02:46 PM
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Re: 1987 IROC-Z convertible. Are 4 IROCs too many?

Thanks Charlie.
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Old 06-02-2017, 10:22 PM
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Re: 1987 IROC-Z convertible. Are 4 IROCs too many?

First cruise night! The car runs awesome!






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Old 06-03-2017, 09:58 AM
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Re: 1987 IROC-Z convertible. Are 4 IROCs too many?

It looks great Charlie!
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Old 06-03-2017, 10:33 AM
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Re: 1987 IROC-Z convertible. Are 4 IROCs too many?

Originally Posted by PurelyPMD View Post
It looks great Charlie!
Thanks Chris! It got a pretty good reaction. And the LG4 performed great. Certainly much livelier than earlier LG4s. This LG4 is basically a roller peanut cam LB9 with a carb and smaller exhaust. And call me juvenile, but I LOVE the sound of the carb at full throttle with the air cleaner lid flipped!

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Old 06-03-2017, 11:56 AM
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Re: 1987 IROC-Z convertible. Are 4 IROCs too many?

Originally Posted by chazman View Post
Thanks Chris! It got a pretty good reaction. And the LG4 performed great. Certainly much livelier than earlier LG4s. This LG4 is basically a roller peanut cam LB9 with a carb and smaller exhaust. And call me juvenile, but I LOVE the sound of the carb at full throttle with the air cleaner lid flipped!
Reminds me of when I got to drive my parents 70 Buick skylark when my car had troubles. 350 2Bbl. 4 door. did great 1 wheel power stands though. Flipped the air cleaner over one time with a friend & I forgot I did it. My dad had the car the next day & he was not happy at all. I could;t understand why he was so mad, but it soon dawned on me had had nothing to do with it being upside-down as much as it meant he knew how I was driving it... Oooops.

that car made a lot of breathing sound as I recall. even part throttle you could hear the vacuum.
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Old 06-03-2017, 12:22 PM
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Re: 1987 IROC-Z convertible. Are 4 IROCs too many?

My '82 LG4 is a TURD! I think the carb needs to be rebuilt. It just has no umph at all. I really don't want to throw a new engine in a 29k mile car, but the '82 LG4 currently feels like it'll get to 60 in 29 seconds!
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Old 06-03-2017, 12:28 PM
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Re: 1987 IROC-Z convertible. Are 4 IROCs too many?

It's starting to look like a 17k mile car again, should clean up pretty well without too much TLC. These cars always looked so good in 'vert form, they just have the right lines with the top down to the point it looks like they were designed to be 'verts.

Nice pickup.
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Old 06-03-2017, 12:28 PM
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Re: 1987 IROC-Z convertible. Are 4 IROCs too many?

Originally Posted by scottmoyer View Post
My '82 LG4 is a TURD! I think the carb needs to be rebuilt. It just has no umph at all. I really don't want to throw a new engine in a 29k mile car, but the '82 LG4 currently feels like it'll get to 60 in 29 seconds!
I wouldn't want to do that either. I'll tell what I would do. Get the carb sorted out. Bump up the initial timing. Get yourself a pair of L69/LB9/L98 exhaust manifolds and Y-pipe and install.

No one but the BIGGEST geek in the world, would even be able to tell you even touched the exhaust.

And for goodness sake, flip that air cleaner lid over!

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Old 06-03-2017, 12:29 PM
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Re: 1987 IROC-Z convertible. Are 4 IROCs too many?

Originally Posted by puma1552 View Post
It's starting to look like a 17k mile car again, should clean up pretty well without too much TLC. These cars always looked so good in 'vert form, they just have the right lines with the top down to the point it looks like they were designed to be 'verts.

Nice pickup.
Thanks puma!
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Old 06-04-2017, 01:06 PM
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Re: 1987 IROC-Z convertible. Are 4 IROCs too many?

puma? Who's that? Haven't seen or heard from this guy in like 2 years. He must've gone the way of Willie and playing with his Mustang now!

Hey Puma!!
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Old 06-04-2017, 07:36 PM
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Re: 1987 IROC-Z convertible. Are 4 IROCs too many?

Looking good chazman, giving that vert the love it deserves!

I remember flipping over the air cleaner lid on my '84 Z28 with an LG4, all I seemed to get out of it was my engine light coming on!
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Old 06-04-2017, 09:16 PM
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Re: 1987 IROC-Z convertible. Are 4 IROCs too many?

Originally Posted by 1988 Iroc 5.7 View Post
Looking good chazman, giving that vert the love it deserves!

I remember flipping over the air cleaner lid on my '84 Z28 with an LG4, all I seemed to get out of it was my engine light coming on!
Thanks!
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Old 06-05-2017, 06:45 PM
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Re: 1987 IROC-Z convertible. Are 4 IROCs too many?

Posted this on the convertible section, but it doesn't seem to have a lot of activity there. I'll copy and paste here:

Originally Posted by chazman
Anyone have a schematic on how to adjust the front bow/pins on a convertible top? Searched, but didn't find anything.

Previous owner of my '87 said that they always had a problem with the top since new. This car here:https://www.thirdgen.org/forums/hist...nvertible.html (1987 IROC-Z convertible. Are 4 IROCs too many?) That's probably why it's spent the past 30 years folded down.

First day I got it, I couldn't get the top to latch, ie., getting the pins and holes lined up until I loosened the 4 adjusting bolts in the rear. And even then it was tough.

Better now, but still takes a lot of finagling to line the front pins up with the windshield. There has to be a way to improve it.

Any words of wisdom or schematics?
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Old 06-08-2017, 08:37 PM
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Re: 1987 IROC-Z convertible. Are 4 IROCs too many?

Got a couple of things today.


This too. Thinking of installing it after clean up, as long as I don't need to damage or alter the core support. I actually got 4 of them today, this is the only complete one, though.
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Old 06-08-2017, 08:58 PM
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Re: 1987 IROC-Z convertible. Are 4 IROCs too many?

The door decals look a little different than my NOS ones. Are those solid two color?
Mine are one color & the dashes are transparent to show body color through.
Maybe I am not seeing it right in the photo, or its the way they are on the backing?

my favorite air cleaner of all time. used to drool over those when they came with the ZZ3 engine kits directly from chevrolet back in the day My 84 HO had one two, but it still reminds me of the kit, more than the car.
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Old 06-08-2017, 09:02 PM
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Re: 1987 IROC-Z convertible. Are 4 IROCs too many?

Originally Posted by chazman View Post
Got a couple of things today.


This too. Thinking of installing it after clean up, as long as I don't need to damage or alter the core support. I actually got 4 of them today, this is the only complete one, though.

Looks like the scoops on the end of the ducts should be swapped from side to side.
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Old 06-08-2017, 09:02 PM
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Re: 1987 IROC-Z convertible. Are 4 IROCs too many?

Now I look again, I think I am seeing the white backing.....
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Old 06-08-2017, 09:07 PM
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Re: 1987 IROC-Z convertible. Are 4 IROCs too many?

Originally Posted by F-body-fan View Post
The door decals look a little different than my NOS ones. Are those solid two color?
Mine are one color & the dashes are transparent to show body color through.
Maybe I am not seeing it right in the photo, or its the way they are on the backing?

my favorite air cleaner of all time. used to drool over those when they came with the ZZ3 engine kits directly from chevrolet back in the day My 84 HO had one two, but it still reminds me of the kit, more than the car.
Ohhhhh, they'd better be EXACT NOS!


I almost was subconsciously looking for a Q-jet car, just to put an HO air cleaner on it.
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Old 06-09-2017, 12:22 AM
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Re: 1987 IROC-Z convertible. Are 4 IROCs too many?

I think using the stock lid will give me the stealthy, inconspicuous look I prefer.





I need to clean up those ducts and go to the hardware store and get a few screws.
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Old 06-09-2017, 12:41 AM
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Re: 1987 IROC-Z convertible. Are 4 IROCs too many?

Originally Posted by chazman View Post
Posted this on the convertible section, but it doesn't seem to have a lot of activity there. I'll copy and paste here:
Thanks Tootie Pang for the PDF! It helped a bunch!
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Old 06-09-2017, 05:05 AM
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Re: 1987 IROC-Z convertible. Are 4 IROCs too many?

that look will get a few scratching their head

Did you find those on ebay? I see them from time to time but usually the price tags are outrageous & sale proofed
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Old 06-09-2017, 05:21 AM
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Re: 1987 IROC-Z convertible. Are 4 IROCs too many?

Guess I should't say sale proof. I just peeked & see some sell for the $400-$500 range in nice shape. I just recall seeing full setups with $800+ price tags. Seems like an awful lot of money for something that is not that uncommon.
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Old 06-09-2017, 09:07 AM
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Re: 1987 IROC-Z convertible. Are 4 IROCs too many?

Originally Posted by F-body-fan View Post
that look will get a few scratching their head

Did you find those on ebay? I see them from time to time but usually the price tags are outrageous & sale proofed

I found them locally. I just wanted one, but he wanted too much money for the one complete setup. We worked out a better deal for everything. I'll probably eBay the rest.
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Old 06-09-2017, 09:44 AM
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Re: 1987 IROC-Z convertible. Are 4 IROCs too many?

Originally Posted by steves View Post
Looks like the scoops on the end of the ducts should be swapped from side to side.
Yeah, they go the other way.

The holes are already in the core support and the coolant overflow tank has the mount molded in for the ducts.

It will look completely factory.
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Old 06-09-2017, 11:44 AM
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Re: 1987 IROC-Z convertible. Are 4 IROCs too many?

Originally Posted by chazman View Post
Yeah, they go the other way.

The holes are already in the core support and the coolant overflow tank has the mount molded in for the ducts.

It will look completely factory.

I can't wait to see how it looks. That set up should have been standard on the base IROC/Z28 with both the LG4 and LO3! I wonder how much of a gain that set up gives? I know the 5.0 H.O. decal is worth at least 5 H.P.
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Old 06-09-2017, 01:45 PM
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Re: 1987 IROC-Z convertible. Are 4 IROCs too many?

Time to start restoring the HO aircleaner. De-rusting the passenger side duct bracket. Can't have rusty brackets on an 18K mile car! I'll post some afters later....



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Old 06-09-2017, 01:47 PM
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Re: 1987 IROC-Z convertible. Are 4 IROCs too many?

Originally Posted by steves View Post
I can't wait to see how it looks. That set up should have been standard on the base IROC/Z28 with both the LG4 and LO3! I wonder how much of a gain that set up gives? I know the 5.0 H.O. decal is worth at least 5 H.P.
Since mine won't have a decal, I'll have to bump the timing to make up the difference.
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Old 06-09-2017, 01:48 PM
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Re: 1987 IROC-Z convertible. Are 4 IROCs too many?

I'll be watching this process chazman. Good luck with it. You can't take too many pictures of the steps.
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Old 06-09-2017, 02:03 PM
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Re: 1987 IROC-Z convertible. Are 4 IROCs too many?

Originally Posted by chazman View Post
Time to start restoring the HO aircleaner. De-rusting the passenger side duct bracket. Can't have rusty brackets on an 18K mile car! I'll post some afters later....




What is that solution you are soaking it in??
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Old 06-09-2017, 02:21 PM
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Re: 1987 IROC-Z convertible. Are 4 IROCs too many?

Originally Posted by DynoDave43 View Post
I'll be watching this process chazman. Good luck with it. You can't take too many pictures of the steps.
Thanks Dave. I've been trying not to bore everyone with everything.

Originally Posted by steves View Post
What is that solution you are soaking it in??
Evaporust.
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Old 06-09-2017, 02:35 PM
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Re: 1987 IROC-Z convertible. Are 4 IROCs too many?

Not boring. I have my own to do some day, either by restoring an L69 unit, or making my own from two L03 units.
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Old 06-09-2017, 03:26 PM
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Re: 1987 IROC-Z convertible. Are 4 IROCs too many?

Originally Posted by DynoDave43 View Post
Not boring. I have my own to do some day, either by restoring an L69 unit, or making my own from two L03 units.
Other than having to plug one vacuum line on the carb, it looks like it'll go right on.
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Old 06-09-2017, 04:50 PM
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Re: 1987 IROC-Z convertible. Are 4 IROCs too many?

Just FYI, there is a difference between LG4 and L69 intake ducts. Guess which is which.




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Old 06-09-2017, 05:44 PM
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Re: 1987 IROC-Z convertible. Are 4 IROCs too many?

Some heavy breathing going on there, or soon to be!
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Old 06-09-2017, 10:19 PM
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Re: 1987 IROC-Z convertible. Are 4 IROCs too many?

After a few hours.


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Old 06-11-2017, 08:39 AM
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Re: 1987 IROC-Z convertible. Are 4 IROCs too many?

After Evaporust. Looks like I still need to prep and paint.
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Old 06-11-2017, 12:24 PM
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Re: 1987 IROC-Z convertible. Are 4 IROCs too many?

Looks like it got rid of most of the rust though.

Quite a difference between LG4 and L69 ducts. I did not know that. Thanks for the side-by-side photos.
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Old 06-11-2017, 09:07 PM
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Re: 1987 IROC-Z convertible. Are 4 IROCs too many?

Originally Posted by DynoDave43 View Post
Looks like it got rid of most of the rust though.

Quite a difference between LG4 and L69 ducts. I did not know that. Thanks for the side-by-side photos.

You're welcome, Dave. Might as well be educational. This is the History/Originality forum, after all!


Too bad the bracket is riveted to the duct. If I could have taken it off, the de-rusting would have gone more quickly. Once I get that bracket painted and everything else cleaned up, I just need to get 3 screws, a clip and a vacuum line cap and I'll be good to go. I'm kind of looking forward to seeing how it drives with it on.

Actually, this LG4 has pretty decent low end torque, more than an L69, but it's all done by 4500 RPM. Just as well, since the 2.73 gear takes forever to wind out.

Last edited by chazman; 06-11-2017 at 10:34 PM.
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Old 06-12-2017, 09:30 PM
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Re: 1987 IROC-Z convertible. Are 4 IROCs too many?

I was fiddling under the hood tonight. I wanted to bump the initial timing, but I noticed some staining on the carb, like it had been weeping fuel. All these torx screws on the top of the carb were about half of a turn loose. Hope that was it. Must have been creating a vacuum leak too, since it seems to have snappier throttle response now that they're tightened..

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I also noticed some oil on the intake. Coming from the valve cover?

Anyway, getting back to timing. That distributor bolt hasn't moved in over 30 years, and it doesn't want to move now. I may need to put a socket and breaker bar on it - oh, and what a stooooooopid place to put the timing tab!
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Old 06-12-2017, 10:18 PM
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Re: 1987 IROC-Z convertible. Are 4 IROCs too many?

Hey, Charlie you may want to consider throwing a chip in that LG4 with a 160 thermostat. I did that on my 85 LG4 and it responded very well. It was quite a noticeable improvement. A set of 1.6 roller rockers will also bolt on with ease and help give the car some more useable rpm. Both are hidden mods that won't hurt the value of the car.

An aluminum driveshaft also helps.
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Old 06-13-2017, 12:21 AM
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Re: 1987 IROC-Z convertible. Are 4 IROCs too many?

Just a mock up. I want to make sure it clears the mind boggling array electrical looms, connectors and vacuum lines.








I don't think I need to install the stove pipe, right?

Looks so much more serious than that weenie LG4 air cleaner!

Last edited by chazman; 06-13-2017 at 12:26 AM.
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