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Third time's a charm - 87 IROC

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Old 09-25-2015, 09:44 PM   #1
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Third time's a charm - 87 IROC

Welcome to my build thread. I've had the car for two years, so have plenty of construction (and destruction) to add to the thread. I've taken this car farther apart than any other 3rd gen, and slightly more than my first car: 71 Camaro. A teaser for things going back in: C4HD & LS brakes, L31/LT4HOT cam/TPI/cut and welded SLP runners, T56, "N10" exhaust, and an old school stereo (Nakamichi head, a/d/s/ and Kenwood amps). We'll see what else I've forgotten.

I'll start off with some good, bad and ugly...

Good! Engine compartment is painted. Next is to pull the cross member and A arms, strip, powder coat and rebuild (Del-A-Lums & Howe 3/4" BJs).




Bad, because it came with a 4th gen rear (4.11s would have gone pretty well with the T56), and I want to run factory IROC wheels. Although the salad shooter 4th gen wheels could classify this as "ugly".



Ugly! PO let water freeze in the block. Cracks below the deck on both sides!
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Old 09-28-2015, 10:59 AM   #2
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Car: 91 Z28, 87 SC, 90 IROC, 92 RS
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Transmission: T56, 700r4's, and NADA
Axle/Gears: 3.89, 3.42, 3.23, NADA


Re: Third time's a charm - 87 IROC

Looking good. Somehow I thought that this car was maroon... Don't know why. You gotta post some pics of the runners and plenum. I'm really excited to see how that turns out.
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Old 09-28-2015, 08:19 PM   #3
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Re: Third time's a charm - 87 IROC

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Somehow I thought that this car was maroon...
Thanks for the sequeway! The parts car was maroon. Although, it was a toss up to which car to keep and rebuild. The red car had obvious rod knock, and I didn't realize yet the blue car had a cracked block. The blue car had/has slight better paint, red one definitely needs body work... The location of problems (center of hood & passenger side B-pillar/roof) and my preference for blue won out.
- So I swapped interiors; complete decent black cloth from the red car, to replace the filthy, mostly grey in the blue car, which itself had replaced the original tan.
- IROC wheels and 3.42/3G rear end (from the red car) replaced the 4.11/4G rear and 93-era Z28 wheels.
- I sold the red car complete, still with rod, for a bit less than I paid, but got the value out of it.








Quote:
Originally Posted by BADNBLK View Post
You gotta post some pics of the runners and plenum.
I am about ready to get the intake, runners, and plenum powder coated. Here is a teaser of the under-construction showing how far I opened them. I got to know Paul (the welder) fairly well due to the number of trip



I love seeing progress pictures from other guy's projects. I just find it really hard to take a break in the action to grab a camera and take pictures.
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Old 09-28-2015, 08:30 PM   #4
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Re: Third time's a charm - 87 IROC

Dynamat and RAAMmat under the mostly installed black interior.






Old school Nakamichi CD/radio and AudioControl EQ. Between an Aux input in the head unit, as well as front and back of the EQ, I have plenty of options for an ipod. The bezel needed just a little trim at the bottom. And the steel strap screwed to the back of the console, that supports the stock radio was in the way. So, cut and bend some light gauge steel, and clearance was had.

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Old 10-15-2015, 10:53 PM   #5
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Re: Third time's a charm - 87 IROC

I am calling the intake done enough for powder coating. Here's after-porting, before-coating shots. I am using the Socal guys for inspiration, and I hope to get close to what they've accomplished.





It's always fun to put the parts together, even though they're months away from going in. The engine, and pre-welded/pre-ported runners, and even the T56.



There are many posts about on-engine, no machine work necessary, bee-hiving the Vortec heads. I have a tendency to overkill, so the heads came off, machined the valve guides, and for screw in studs. I went with an .015" head gasket to pick up a little compression over the ~.026" factory gasket. It also brings quench down to .040".
I still went with the Crane +.050" locks to dial in spring height and coil bind. (That was last year, so I'd have to find my notes if anyone wants to know exactly what I measured.)

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Old 10-16-2015, 10:03 AM   #6
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Re: Third time's a charm - 87 IROC

The runners look great! Sub'd for results
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Old 10-22-2015, 06:23 PM   #7
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Axle/Gears: 3.89, 3.42, 3.23, NADA


Re: Third time's a charm - 87 IROC

Looking great man! The interior is looking killer!
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Old 10-22-2015, 08:07 PM   #8
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Re: Third time's a charm - 87 IROC

@Brandon & JP - Thanks for the compliments. The intake and runners are with Paul getting blasted and powder coated. I took the K member and A arms to Powder Coating Specialty to handle the bigger parts. I am looking forward to putting parts back on the car!
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Old 10-26-2015, 10:19 PM   #9
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Re: Third time's a charm - 87 IROC

Here's a picture from the welder/powdercoater. I can't wait to get them in-hand!

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Old 10-26-2015, 10:27 PM   #10
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Re: Third time's a charm - 87 IROC

Nice color!
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Old 11-01-2015, 03:29 PM   #11
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Re: Third time's a charm - 87 IROC

Ta-da! Here is the intake, loosely assembled. The "carbon black" anodized TPI throttle body looks a bit purple.



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Old 11-02-2015, 06:08 PM   #12
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Car: 91 Z28, 87 SC, 90 IROC, 92 RS
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Axle/Gears: 3.89, 3.42, 3.23, NADA


Re: Third time's a charm - 87 IROC

The powder looks awesome. You should have Paul powder the TB too
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Old 11-02-2015, 08:01 PM   #13
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Re: Third time's a charm - 87 IROC

Quote:
Originally Posted by BADNBLK View Post
The powder looks awesome. You should have Paul powder the TB too
Yeah. The TB looks pretty cool on its own, but then kinda looks like crud against the rest of the intake.

While waiting for powder, I hung the struts and mounts. Still waiting on the K & A arms at the big-parts-coater. I really want to get the wheels back on!
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Old 11-12-2015, 09:00 PM   #14
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Re: Third time's a charm - 87 IROC

nice work. love what you did to the intake. im subscribing to get more updates. good luck with this build, man!
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Old 12-26-2015, 07:56 PM   #15
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Re: Third time's a charm - 87 IROC

Unexpected score. Local guy selling his IROC with louvers. I offered him $200 for just the louvers... including all 8 brackets, but only 4 of 6 dzus fasteners. Everything is in excellent condition!
Anybody got a pair of louver dzuses they want to sell me.

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Old 12-30-2015, 10:17 AM   #16
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Re: Third time's a charm - 87 IROC

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Unexpected score. Local guy selling his IROC with louvers. I offered him $200 for just the louvers... including all 8 brackets, but only 4 of 6 dzus fasteners. Everything is in excellent condition!
Anybody got a pair of louver dzuses they want to sell me.

I personally hate the louvers, but I'm all in for a good deal. I have done that with several things buying parts of a car someone was selling. Nice work.
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Old 12-30-2015, 11:29 AM   #17
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Re: Third time's a charm - 87 IROC

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Originally Posted by BADNBLK View Post
I personally hate the louvers, but I'm all in for a good deal. I have done that with several things buying parts of a car someone was selling. Nice work.
Thanks. The buyer had the same opinion as you, which is exactly why I got the deal. He got the louvers along with the car, and I gave him "money for nothing", as he knew louvers wouldn't make or break any deal on him selling the car (without the louvers).

I guess that is the take-away lesson: Want something that no one else does, and you'll get it cheap!
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Old 12-30-2015, 02:43 PM   #18
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Car: 91 Z28, 87 SC, 90 IROC, 92 RS
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Re: Third time's a charm - 87 IROC

Quote:
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Thanks. The buyer had the same opinion as you, which is exactly why I got the deal. He got the louvers along with the car, and I gave him "money for nothing", as he knew louvers wouldn't make or break any deal on him selling the car (without the louvers).

I guess that is the take-away lesson: Want something that no one else does, and you'll get it cheap!
As long as we are learning right!?
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Old 01-08-2016, 08:26 PM   #19
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Re: Third time's a charm - 87 IROC

I've been bending tube lately. Here is the external-EGR from a Dyno Don header (Thanks to Vincent for the idea!) to the Edelbrock vortec TPI base. There's 1/2" all around, and I will wrap it in a heat sleeve.

The tube is 3/8" 0.035" stainless. (I also got some .049" because I wasn't sure which size I would use).





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Old 01-09-2016, 10:23 AM   #20
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Re: Third time's a charm - 87 IROC

Nicely done.
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Old 02-18-2016, 08:43 AM   #21
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Re: Third time's a charm - 87 IROC

Good idea with the EGR! I'm also liking the powder job. Love or hate the louvers, they are period correct.
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Old 02-18-2016, 08:52 AM   #22
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Re: Third time's a charm - 87 IROC

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Good idea with the EGR! I'm also liking the powder job. Love or hate the louvers, they are period correct.
Thanks on all.

I did run into a potential problem with the EGR: the fitting running into the AC housing. Once I get everything else in place (install header around the dipstick, relocated AIR valve, etc), I may have to lift the engine a bit to head the passenger header into place WITH the fitting attached.
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Old 02-20-2016, 02:13 PM   #23
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Re: Third time's a charm - 87 IROC

Great stuff so far. Looking forward to the future progress.
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Old 04-05-2016, 08:05 AM   #24
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Re: Third time's a charm - 87 IROC

Looks good. Double check that EGR tube doesn't interfere with the A/C box and/or firewall!
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Old 04-05-2016, 08:21 AM   #25
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Re: Third time's a charm - 87 IROC

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Looks good. Double check that EGR tube doesn't interfere with the A/C box and/or firewall!
Thanks. It's the fitting on the header that hits the AC box.
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Old 09-24-2016, 07:35 PM   #26
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Re: Third time's a charm - 87 IROC

Finally a break in building a table, cabinet installation and other household projects let me get back to the car.

Today's topic: relocating the AIR valve. I found some inspiration from The Project's project...here. Instead of squeezing behind the motor mount, I went in front, directly below the pump. It is snug between the lower radiator hose, but does fit with clearance.

I had welded up the L bracket a few months ago. Sourced some 3/4" mandrel 90*s, chopped them up, welded back together, and coat it with Eastwood's chassis black.




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Old 09-24-2016, 08:24 PM   #27
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Re: Third time's a charm - 87 IROC

Looks like it could have left the factory that way. You're becoming the Custom Plumbing King!
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Old 06-19-2017, 08:10 PM   #28
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Re: Third time's a charm - 87 IROC

And now for some steps backwards: The 4th gen coolant can sounded like a good idea to tidy up the engine bay. However, it moves the battery up and toward the center of the car about an inch. It's not bad, but not where I wanted to go. So, out comes the painted battery tray, and in goes an aftermarket replacement. You can see how I hunted for some of the spot welds.

About the only positive is the replacement comes with an unstripped battery hold down nut. But, now I need to find the correct threaded bolt for that!

The 4th gen tank is for sale. $55 PP'd and shipped in CONUS. Includes the metal pickup tube.




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