1987 IROC-Z

[88WS-6]

Just picked this up yesterday:

1987 IROC-Z
62,400 miles
LB9, T5, G92
Hardtop
Koni yellows
UMI adj camber plates
Adj panhard bar
LS1 front/rear brakes
Slotted front rotors
!A/C
!Smog pump


New:
Alternator
Water pump
Power steering pump
Radiator + hoses
180* Thermostat
Dual electric fans (on manual switch)
Battery
Mech. Fuel Pump
Accel distributor
Crane iginition box


I'm the third owner of this car. The original owner put about 40,000 miles on the car and then let it sit under a tree in Atco for about 15 years. The second owner got the car in 2008 and put in racing seats, G-force 5 point harness, an Autopower 4 point harness support cage, and took out the rear seats. He also put on the high-rise spoiler, painted the car, did the brakes and suspension work and swapped on a Holley 600cfm carb and RPM Performer intake manifold. It came with the original TPI with new injectors and a new distributor, cap and rotor.

The original 9 bolt rear was professionally rebuilt with 3.70s gears and new posi cones. The quick ratio steering box was also rebuilt along with new ball joints, inner/outer tie rod ends, center link and idler arm.

I plan to sell the seats and put in power seats from a 91 GTA. I'm debating removal of the harness bar, but it will stay for now. The only issue I need to resolve is the fuel pump. He put a Holley pump right in front of the rear axle and it cut out on me three times on the parkway driving home yesterday. The stock pump is still in the tank so I'll be hooking that back up and putting the Mallory 4309 AFPR on the carb. Oh and the e-brake doesn't work, so I'll be fixing that. Plus the car needs to be inspected... :facepalm:


http://www.fquick.com/images/vehicles/full/41137360712.jpg?1329243325

http://www.fquick.com/images/vehicles/full/41137360713.jpg?1329243328

http://www.fquick.com/images/vehicles/full/41137360714.jpg?1329243331

http://www.fquick.com/images/vehicles/full/41137360715.jpg?1329243336

http://www.fquick.com/images/vehicles/full/41137360716.jpg?1329243338

http://www.fquick.com/images/vehicles/full/41137360717.jpg?1329243341

http://www.fquick.com/images/vehicles/full/41137360718.jpg?1329243344

http://www.fquick.com/images/vehicles/full/41137360720.jpg?1329243348

http://www.fquick.com/images/vehicles/full/41137360721.jpg?1329243350



And don't forget to buy my GTA.


~Matt

[WildBillyT]

You went for it! Cool.

Post up in the tech section about the fuel stuff. Since it's carbed you can probably just put a mechanical fuel pump on it. It's missing the filter between the pump and carb (from what I can see). And if it's a Holley Red/Blue/Black pump out back it needs a canister filter too.

Why inspection? QQ that bitch.

[coolmanvette75]

Freshen it up under the hood and you are set. The exterior and interior both look mint. I would keep the seats the way they are. Sweet purchase...

[usp55]

:clap:
Love black third gens

[88WS-6]

Freshen it up under the hood and you are set. The exterior and interior both look mint. I would keep the seats the way they are. Sweet purchase...

I hate the seats and in case anyone hasn't driven with a 5 point harness on, don't do it. I was throwing quarters out the window at the tolls because I couldn't even turn my shoulders.

[88WS-6]

You went for it! Cool.

Post up in the tech section about the fuel stuff. Since it's carbed you can probably just put a mechanical fuel pump on it. It's missing the filter between the pump and carb (from what I can see). And if it's a Holley Red/Blue/Black pump out back it needs a canister filter too.

Why inspection? QQ that bitch.

He put a Holley (blue I think) mechanical pump in already. I was cruising at 70 all three times and it would just start to sputter and hit a wall. The motor would die as soon as I put the clutch in. It's definitely the pump because the motor ran like a top and was great the entire rest of the ride.

[1320B4U]

Thats a nifty ac/delete setup he was running...lol. Looks like the making of a killer, killer auto x'er.

[88WS-6]

Looks like the making of a killer, killer auto x'er.

Yea all it's missing is an LSX motor :twisted:



I agree on the A/C delete. I think it's dryer hose or something. I will eventually get an actual A/C delete box.

[WildBillyT]

He put a Holley (blue I think) mechanical pump in already. I was cruising at 70 all three times and it would just start to sputter and hit a wall. The motor would die as soon as I put the clutch in. It's definitely the pump because the motor ran like a top and was great the entire rest of the ride.

The Holley red, blue, and black pumps are electric ones, usually mounted out back. Guys botch installs of them all the time.

[88WS-6]

Well chalk up another one. I read about the swaps on thirdgen about fuel injection to carbs and the Mallory AFPR solves the issue with the stock in tank pump. The stock pump for TPI puts out double what the carb needs. The AFPR knocks down the pressure. I'd like to go that route.

[WayFast84]

If that has a mechanical pump option on the block I have a pump you can have for free.

[maroman88]

Well chalk up another one. I read about the swaps on thirdgen about fuel injection to carbs and the Mallory AFPR solves the issue with the stock in tank pump. The stock pump for TPI puts out double what the carb needs. The AFPR knocks down the pressure. I'd like to go that route.

i have a TPI pump into a regulator for my carb on the 88, works like a charm!

also why no QQ plates? no more inspection needed

[shadowfire]

that car looks great man. cleaner that most out their. nice snag

[chrisfrom nj]

nice car congrats what did you do with the gta

[1320B4U]

i have a TPI pump into a regulator for my carb on the 88, works like a charm!

also why no QQ plates? no more inspection needed

You can knock down the pressure THAT much w/a regulator and a stock tpi pump? I heard from a few sources the difference in psi is too much. What size carb you running?

[WildBillyT]

You can knock down the pressure THAT much w/a regulator and a stock tpi pump? I heard from a few sources the difference in psi is too much. What size carb you running?

That's actually what I was thinking. Seems like too much pressure to dial back to 6-8psi.

[maroman88]

lemme find the part stand by

this looks similar to mine, i bought it a few years ago
http://www.summitracing.com/parts/MAA-4309/

[//<86TA>\\]

That's actually what I was thinking. Seems like too much pressure to dial back to 6-8psi.

with a good regulator you can do about anything. my a1000 pump puts out ~45 psi and i have a steady 6.5 psi after my regulator.

[//<86TA>\\]

hey check this **** out, the car HAS a mechanical pump, you can see it on the block in the pics! how many fuel pumps does this car have, lol.... what is the 8th digit of the vin? I see z28 emblems, shouldn't an iroc have iroc emblems? Matt are you sure that its not a factory carbed car? I dont see fuel lines on the driverside, which it would have if it was a TPI car. There may be no intank pump

[WildBillyT]

hey check this **** out, the car HAS a mechanical pump, you can see it on the block in the pics! how many fuel pumps does this car have, lol.... what is the 8th digit of the vin? I see z28 emblems, shouldn't an iroc have iroc emblems? Matt are you sure that its not a factory carbed car? I dont see fuel lines on the driverside, which it would have if it was a TPI car. There may be no intank pump

Wow, missed that in the pics LOL.

I think the IROC rocker badges started in 88?

[maroman88]

correct, the z28 name was dropped in 88 and it just became an iroc-z

[88WS-6]

hey check this **** out, the car HAS a mechanical pump, you can see it on the block in the pics! how many fuel pumps does this car have, lol.... what is the 8th digit of the vin? I see z28 emblems, shouldn't an iroc have iroc emblems? Matt are you sure that its not a factory carbed car? I dont see fuel lines on the driverside, which it would have if it was a TPI car. There may be no intank pump

Oh christ. Well the 8th digit is an F and I looked over the build sheet. LB9 MM6 G92 J65 all that jazz. He gave me what he said is the stock TPI with new injectors. He said the wiring harness is MIA though because he yanked it out when he put on the carb. I also didn't think you could get a 9 bolt with anything but TPI in 87, but I could be wrong.

1320B4U: he said it's a Holley 600cfm, but I haven't confirmed via part # yet.


This thread shows a little about the Mallory AFPR for a TBI to carb swap:

http://www.thirdgen.org/techboard/carburetors/608361-fuel-pump-questions.html

I'm sure TPI has an even higher psi pump.

[88WS-6]

nice car congrats what did you do with the gta

Still for sale. Make me an offer...

[WildBillyT]

Oh christ. Well the 8th digit is an F and I looked over the build sheet. LB9 MM6 G92 J65 all that jazz. He gave me what he said is the stock TPI with new injectors. He said the wiring harness is MIA though because he yanked it out when he put on the carb. I also didn't think you could get a 9 bolt with anything but TPI in 87, but I could be wrong.

1320B4U: he said it's a Holley 600cfm, but I haven't confirmed via part # yet.


This thread shows a little about the Mallory AFPR for a TBI to carb swap:

http://www.thirdgen.org/techboard/carburetors/608361-fuel-pump-questions.html

I'm sure TPI has an even higher psi pump.

I think B4Z is the RPO code for IROC in that year. It looks like it has the 5500 redline tach which is for 305 TPI/5 speed cars.

[88WS-6]

Yea sorry. The build sheet has everything I needed to see. I'll take a pic later today when I get home. Off the top of my head it had:


B4Z - IROC
G80 - limited slip diff
G92 - performance rear axle (3.45 9 bolt)
J65 - 4 wheel disc brakes
KC4 - Oil cooling system
LB9 - 305 TPI
MK6 - Borg Warner 5 spd 2.95 1st gear w/OD
MM5 - 5 spd manual

[88WS-6]

SPID sheet (no MK6, hmmm):
http://www.fquick.com/images/vehicles/full/41137360803.jpg?1329393082

Door sticker:
http://www.fquick.com/images/vehicles/full/41137360800.jpg?1329392616

IROC springs with 3/4 coil cut in the front and 1/2 coil cut in the back:
http://www.fquick.com/images/vehicles/full/41137360799.jpg?1329392600

You can barely see my dog in the background:
http://www.fquick.com/images/vehicles/full/41137360802.jpg?1329392641

Aftermarket dual fans on a manual switch:
http://www.fquick.com/images/vehicles/full/41137360791.jpg?1329392503

Two f-bodies (my fianace is pissed):
http://www.fquick.com/images/vehicles/full/41137360786.jpg?1329392436

I may need to tune the carb, but it smells awesome:
http://www.fquick.com/images/vehicles/full/41137360785.jpg?1329392424

It's good when you can see the threads right?
http://www.fquick.com/images/vehicles/full/41137360801.jpg?1329392628

[88WS-6]

Holley Carb #s:
http://www.fquick.com/images/vehicles/full/41137360805.jpg?1329395462

Ride height:
http://www.fquick.com/images/vehicles/full/41137360804.jpg?1329395451

[88WS-6]

The Holley part number confirms it's a model 4160 600cfm carb, vaccum secondaries with a metering plate. The bottom number is the build date...

Feb 1970? Damn....

[WildBillyT]

How many bolts are holding the intake down?

[88WS-6]

How many bolts are holding the intake down?

I want to say 4 on each side. The doubles in the middle and one for the corners.

[88WS-6]

I also found the difference in the T5 RPOs:

MK6 - BW 5 spd, 2.95 1st, .74 OD
M39 - BW 5 spd, 2.95 1st, .63 OD

So I got the CAFE trans, even with the G92 package. Not sure if it's a world class though.

[V]

afaik, 1988 started world class T5

and those exposed intake manifold threads are due to a pre-87 manifold on centerbolt heads

[WayFast84]

I still have that mechanical fuel pump...

and those exposed intake manifold threads are due to a pre-87 manifold on centerbolt heads
:bertstare:

[WildBillyT]

and those exposed intake manifold threads are due to a pre-87 manifold on centerbolt heads

I was trying to figure that myself.

Best I can tell it's the right intake but with the washers the aluminum cracked. On Vortec pattern heads there's no holes there IIRC.

[V]

Matt, you can just re-drill the angle of the inside holes, and you can make the manifold fit. Not the best way, but possible.

[88WS-6]

Ok thanks. And WBT, there are 6 bolts per side

[88WS-6]

So my plans for this car are:

-Sort out fuel delivery
-Swap springs with my GTA (Eibach Pro-kit)
-Fix e-brake cables
-Install Hooker shorty headers (2055s) with new wideband O2 kit
-Tune carb using O2 kit
-Race it

And eventually I'd like to put on the biggest set of C5 Z06 wheels and tires I can fit (black with the chrome lip).

I think these are the C5 deep dish, but it would look similar:

http://ls1tech.com/forums/attachments/wheels-tires/331346d1324661155-anyone-black-c5-deepdishs-190272_1626597861606_1136310101_1966830_3026681_n. jpg

[88WS-6]

Oh here's one:

http://avatars.ibsrv.net/ibsrv/res/src:ls1tech.com/get/forums/image.php?u=121931&type=sigpic&dateline=1303078203



I'm not a fan of the rivets though...

[WayFast84]

you can get them without rivets...

http://www.oewheelsllc.com/Wheels_3/Wheels-for-Camaro_4/Z06_wheels

[Anti_Rice_Guy]

Deep dish would like 10x better

[88WS-6]

you can get them without rivets...

http://www.oewheelsllc.com/Wheels_3/Wheels-for-Camaro_4/Z06_wheels

Yea I know, thanks. I was just referring to the ones in the picture.

[townsend]

get the c5 deep dish but without rivets...cuz im getting the matte black ones with rivets for my 87 lol. yahtzee (thirdgen.org) has a sweet car. but quite honestly im really liking yours. i want to put the highrise on mine now

[88WS-6]

Well the deep dish is probably cheaper too... hmmm

One reason that I really like the C5 Z06 wheels is that they are very light. I would look into getting the same size for all four corners (not staggered like a stock C5 vette) and as wide as I can. Hopefully 295s in the back.

[88WS-6]

I was looking at these, 17s all the way around is big enough for me:

http://www.ebay.com/itm/17-Rims-Fit-Camaro-Corvette-Z06-Style-Wheels-SET-/390385747537?pt=Motors_Car_Truck_Parts_Accessories&vxp=mtr&hash=item5ae4cdc651

What's the widest tire you can fit on a 9.5 inch wheel?

[townsend]

i like them too. plus a good price to boot. im just partial to the c5 deeps' cuz of yahtzee's car, i love the look. itd be nice and probably more cost effective to run the same size all the way around so you can rotate the back to front when you beat the fronts up at the track

[88WS-6]

i like them too. plus a good price to boot. im just partial to the c5 deeps' cuz of yahtzee's car, i love the look. itd be nice and probably more cost effective to run the same size all the way around so you can rotate the back to front when you beat the fronts up at the track

That is one benefit. I've also talked to people who have autocrossed third gens and they have said that staggered wheels really affect turn-in radius and even predictability in most cases.

[WayFast84]

Everytime I come in this thread it makes me want a thirdgen camaro :(. You might have problems with 17's rubbing front renders since its so low, my 84 would rub stock height with gta 16's.

[maroman88]

im lowered a good amount and my 17's dont rub up front

[88WS-6]

Everytime I come in this thread it makes me want a thirdgen camaro :(. You might have problems with 17's rubbing front renders since its so low, my 84 would rub stock height with gta 16's.

I plan to have my Eibach pro-kit on before the rims. My GTA with Koni yellows and Eibach pro-kit:



http://www.fquick.com/images/vehicles/full/36229356671.jpg?1319110268



I'm thinking 17 inch vette wheels, 9.5 inches wide with 275/40/R17s all the way around. It will require 2 in adapters on each wheel too.

[maroman88]

2 inch? 1.25 up front 1 in the rear

[BonzoHansen]

It will require 2 in adapters on each wheel too.What?

[WildBillyT]

Everytime I come in this thread it makes me want a thirdgen camaro :(. You might have problems with 17's rubbing front renders since its so low, my 84 would rub stock height with gta 16's.

If they are the stock springs it ain't stock height.

[88WS-6]

What?

2 inch wheel adapters, like the Skulte ones. Right?

[88WS-6]

If they are the stock springs it ain't stock height.

PO said stock springs just cut down. 25 year old stock springs so they are really low.

[WildBillyT]

PO said stock springs just cut down. 25 year old stock springs so they are really low.

I was talking about his '84. :nod:

[1320B4U]

GTA mesh wheels are staggered (same size, just offset)...not running them correctly (even the stock ws6 snowflakes are diff offsets) would make them rub on the tie rod end. Spacers and extended lug nut studs are what i needed to run 17x9.5 on my formula.

[88WS-6]

I was talking about his '84. :nod:

Oh sorry

[BonzoHansen]

2 inch wheel adapters, like the Skulte ones. Right?

oh, ok, i read that wrong lol carry on!

[88WS-6]

Oh ok. You had me second guessing myself. I thought I had at least gotten that one right...

[WayFast84]

I'm glad you don't have issues with rubbing.If they are the stock springs it ain't stock height.

GTA mesh wheels are staggered (same size, just offset)...not running them correctly (even the stock ws6 snowflakes are diff offsets) would make them rub on the tie rod end. Spacers and extended lug nut studs are what i needed to run 17x9.5 on my formula.

They were stock and on right. They rubbed the inner wheel well not the tie rod. God I miss those wheels :|

[WildBillyT]

I'm glad you don't have issues with rubbing.



They were stock and on right. They rubbed the inner wheel well not the tie rod. God I miss those wheels :|

If they are the original stock springs they are sagged. Therefore you are lowered by default.

[88WS-6]

Add this to the list too:

http://rpmspeed.com/images/P3050.jpg



Pro 5.0 shifter because I feel like I'm driving a tractor.

[88WS-6]

2 inch? 1.25 up front 1 in the rear

Hey sorry I just saw this because it was the last post on that page. I thought I needed at least two inches with the spacers or adapter for vette wheels. Specifically 17 X 9.5 vette wheels.

[maroman88]

im runnin 17x9.5 repro C5Z's. i have 1in all around, but should have gotten 1.25 up front

[88WS-6]

im runnin 17x9.5 repro C5Z's. i have 1in all around, but should have gotten 1.25 up front

Oh ok thanks. Did you use spacers or adapters? I'm not sure if there's a difference except that adapters put less stress on the wheel hub right?

[maroman88]

adapters, i hope they dont make spacers that big lol.... they bolt on with a set of lugs n then u bolt up the wheel to them with another set of lugs

[Ian]

Nice car Matt! Can I drive it when I get home?

[BigAls87Z28]

Nice car Matt! Can I drive it when I get home?

YOU'RE ALIVE!! Thank God.

Anyway, 1 in adapters is all you used? I have 2's up front, 2.5's now on the back, and my ZR1's (17x9.5 and 17x11) sit perfect.

[88WS-6]

Nice car Matt! Can I drive it when I get home?

Hell yea bro. You can drive it after we fix it, haha.

[88WS-6]

Anyway, 1 in adapters is all you used? I have 2's up front, 2.5's now on the back, and my ZR1's (17x9.5 and 17x11) sit perfect.

Ok thanks Al.

[Ian]

YOU'RE ALIVE!! Thank God.

Of course I'm alive, ya jerk! You had doubts?

Hell yea bro. You can drive it after we fix it, haha.

Sounds good to me, what has to get fixed?

[88WS-6]

Sounds good to me, what has to get fixed?

Not much and it should be done well before you get home. I was just joking with you. Come home safe and then we'll beast mode the IROC.

[BigAls87Z28]

I also remembered that i have C4 HD brakes up front, so the offset is different.

[88WS-6]

For you 3rd gen Camaro owners:

This plastic piece between the front bumper and radiator, is it supposed to be up higher? The stock TPI intake was gone when I got the car and I'm used to seeing that piece so I have no clue if this looks right:

http://www.fquick.com/images/vehicles/full/41137361622.jpg?1330949657

http://www.fquick.com/images/vehicles/full/41137361623.jpg?1330949670





This is where it attaches to the bumper and it is bolted on:
http://www.fquick.com/images/vehicles/full/41137361624.jpg?1330949683


This is what happens when you get flat bedded twice with cut springs:

http://www.fquick.com/images/vehicles/full/41137361619.jpg?1330949622


And this is how my hood latch lines up now. You can see the marks where the latch is hitting now about 1/4 inch behind the opening for it:

http://www.fquick.com/images/vehicles/full/41137361618.jpg?1330949607

[88WS-6]

I'm not sure what happened with this pic, but I have the correct console badge now:

http://www.fquick.com/images/vehicles/full/41137361620.jpg?1330949635

[greenformula92]

That plastic piece does look a little out of place but like you im used to having the TPI intake in the way

[maroman88]

plastic piece looks normal, u should find a new towing company lol

[88WS-6]

http://www.fquick.com/images/vehicles/full/41137362488.jpg?1332765801


http://www.fquick.com/images/vehicles/full/41137362487.jpg?1332765784



Took a few pics this past weekend while I was building a ramp off the side steps for my dog. I just got brand new, clear GM parking lights in the mail and they look awesome. No pics of them yet. I'm debating whether I should install them now or wait for after I install a new front bumper. Anyone know of a good place to get the front bumper from? I also need a new high beam headlamp because the one passenger side one is hazy.

[88WS-6]

I will also be getting HID fog lights at some point, probably the kit below.

H4 single beam 4300K kit

http://www.xenonking.com/Visionpro-4300k-Hid-Kit-Car.html

[greenformula92]

you can get the sealed beam headlights at any auto parts store. if you are going to try and find a front bumper cover try to find a GM one, the aftermarket ones fit ok but after a while they atart to shrink, then the paint flakes off and it starts to pull the fenders in a little.

[Tru2Chevy]

I will also be getting HID fog lights at some point, probably the kit below.

H4 single beam 4300K kit

http://www.xenonking.com/Visionpro-4300k-Hid-Kit-Car.html


Why not look into doing an HID retrofit on the headlights (or even just upgrading your stock sealed beams to better quality halogens with replaceable bulbs) and leaving the fog lights as an actual fog light.

- Justin

[BigAls87Z28]

Fog light ducting stuff looks like mine. Ive tried to pull it up to fit it over the bar, but no dice. I think they all break that way.

Not a fan of the blinding brilliant light scattering all over the road. Eventually, I will go BLS hotness.

[88WS-6]

Why not look into doing an HID retrofit on the headlights (or even just upgrading your stock sealed beams to better quality halogens with replaceable bulbs) and leaving the fog lights as an actual fog light.

- Justin

Because one fog light is out so I figured I would replace them both with HID. Just a thought, not necessarily going to happen... Like everything else.

[88WS-6]

Got clear parking lights, a fog light bulb and a new high beam lamp to replace the dull looking passenger side one. After getting those in, my driver's side tail light went out of course.
Also just ordered Jegs fittings to install a fuel pressure regulator and gauge and try to finish off this fuel delivery-itis. Same order contains Hawks HPS pads for the LS1 brakes and a Pro 5.0 shifter. I'm hoping to have the car at Duke Island next weekend.

[greenformula92]

I have the filler piece that will cover up the hole between the hood latch and the bumper cover if your interested. Its for a TBI car but Im sure it will get the job done.

[88WS-6]

I have the filler piece that will cover up the hole between the hood latch and the bumper cover if your interested. Its for a TBI car but Im sure it will get the job done.

Ok I'll let you know, but it hasn't bothered me yet and its way down my list.

Although I thought replacing worn lights was not a priority but then it ends up being done now so who knows...

[ReDmAn1902]

JUst wanted to say nice lookn ride, congrats and good luck with it.