LTX and LSX Putting LT1s, LS1s, and their variants into Third Gens is becoming more popular. This board is for those who are doing and have done the swaps so they can discuss all of their technical aspects including repairs, swap info, and performance upgrades.

My turbo 4.8l 87 IROC build

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Old Sep 23, 2011 | 10:15 PM
  #1  
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From: Home of most 3rd gens Van Nuys, CA
Car: 1987 IROC
Engine: Turbo 293ci 4.8l
Transmission: T56
My turbo 4.8l 87 IROC build

well i got the chance to buy my old car back. i built this car back in like 04-05 and sold it for $5,500, bought it back a week ago not running but got it running for $700. absolutely love this car and drives soo much nicer then my 91. decided to go turbo 4.8l and hopefully t56. the plan is to completely shave the enigne bay clean and fill all holes and whatever. just picked up a 4.8l for $200 now to get the rest.

how it used to look:

By mike87cam at 2011-09-11

By mike87cam at 2011-09-11

and how i got it:

By mike87cam at 2011-09-23

By mike87cam at 2011-09-23

By mike87cam at 2011-09-23

Last edited by INTIMIDATOR Z; Nov 24, 2011 at 01:40 PM.
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Old Sep 23, 2011 | 10:29 PM
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From: Home of most 3rd gens Van Nuys, CA
Car: 1987 IROC
Engine: Turbo 293ci 4.8l
Transmission: T56
Re: My 87 IROC build

already tearing it apart. man the coolant was as black as used oil and was hardly in any of the coolant lines. they ran a cheap little tranny cooler and there was no fluid goin through that. anyways heres some pics of the tear down process and the 4.8l i just got.



By mike87cam at 2011-09-23

By mike87cam at 2011-09-23

By mike87cam at 2011-09-23

By mike87cam at 2011-09-23

By mike87cam at 2011-09-23

By mike87cam at 2011-09-23

By mike87cam at 2011-09-23

By mike87cam at 2011-09-23
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Old Sep 23, 2011 | 10:50 PM
  #3  
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Car: 91 RS
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Re: My 87 IROC build

Awesome you get to do this swap on your old car.

Good luck man!
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Old Sep 24, 2011 | 12:38 PM
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Re: My 87 IROC build

Ouch that poor car
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Old Sep 24, 2011 | 08:35 PM
  #5  
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From: Home of most 3rd gens Van Nuys, CA
Car: 1987 IROC
Engine: Turbo 293ci 4.8l
Transmission: T56
Re: My 87 IROC build

did a little bit of work today on the car. made some small progress.


By mike87cam at 2011-09-24

By mike87cam at 2011-09-24

By mike87cam at 2011-09-24

By mike87cam at 2011-09-24

By mike87cam at 2011-09-24

By mike87cam at 2011-09-24

By mike87cam at 2011-09-24
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Old Sep 24, 2011 | 08:35 PM
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Re: My 87 IROC build

after slight pressure washing.

By mike87cam at 2011-09-24

By mike87cam at 2011-09-24

By mike87cam at 2011-09-24


found this in the k-member.

By mike87cam at 2011-09-24
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Old Sep 24, 2011 | 08:55 PM
  #7  
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Re: My 87 IROC build

Looks like it'll be a nice car again..someday
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Old Sep 24, 2011 | 09:51 PM
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Re: My 87 IROC build

i sure hope so. maybe i can win another car show.
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Old Sep 26, 2011 | 06:54 AM
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Re: My turbo 4.8l 87 IROC build

i remember this car from back in the day. goodluck with the swap, i'm sure it'll be a blast to drive!
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Old Sep 28, 2011 | 05:53 PM
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Re: My turbo 4.8l 87 IROC build

Sucks your Ol car got trashed! Should be a sweet swap! What are your goals?
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Old Sep 28, 2011 | 07:14 PM
  #11  
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From: Home of most 3rd gens Van Nuys, CA
Car: 1987 IROC
Engine: Turbo 293ci 4.8l
Transmission: T56
Re: My turbo 4.8l 87 IROC build

nothing real special stock 4.8l with a t70 turbo and hopefully 6spd. hoping for around 400rwhp.
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Old Sep 28, 2011 | 09:40 PM
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Re: My turbo 4.8l 87 IROC build

That shouldn't be to hard to get. Good luck!
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Old Sep 28, 2011 | 11:51 PM
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Re: My turbo 4.8l 87 IROC build

Sweet project. Your power goals should be easily met with that setup. Just remember that more power will only be a spring change away
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Old Sep 29, 2011 | 11:11 AM
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Re: My turbo 4.8l 87 IROC build

good project.. i ll trying like this next year..i wish..
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Old Sep 29, 2011 | 12:05 PM
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Re: My turbo 4.8l 87 IROC build

Originally Posted by INTIMIDATOR Z
nothing real special stock 4.8l with a t70 turbo and hopefully 6spd. hoping for around 400rwhp.
I like it. That's gonna be sweeet. Like your new sig by the way.
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Old Oct 22, 2011 | 08:12 PM
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From: Home of most 3rd gens Van Nuys, CA
Car: 1987 IROC
Engine: Turbo 293ci 4.8l
Transmission: T56
Re: My turbo 4.8l 87 IROC build

well just been collecting some parts. slowly gettin there.

heres what i got soo far:

intercooler:


2002 LS1/T56 harness:


1" set back motor mount adapter plates:


clutch pedal setup:

Last edited by INTIMIDATOR Z; Oct 23, 2011 at 05:24 PM.
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Old Oct 23, 2011 | 05:24 PM
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Engine: Turbo 293ci 4.8l
Transmission: T56
Re: My turbo 4.8l 87 IROC build

just been doin some cleanin on the engine bay and motor this weekend. at least the internals of the engine look pretty good.






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Old Oct 23, 2011 | 07:40 PM
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Re: My turbo 4.8l 87 IROC build

Looks like the oil was changed often
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Old Oct 31, 2011 | 01:08 AM
  #19  
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Re: My turbo 4.8l 87 IROC build

lookin good, now this time dont sell it
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Old Oct 31, 2011 | 03:25 PM
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Re: My turbo 4.8l 87 IROC build

Originally Posted by kmcn47
lookin good, now this time dont sell it
I agree. Its a shame what abuse some of these cars get! Did you just end up finding it for sale by some random guy or the guy you sold it to?
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Old Oct 31, 2011 | 06:37 PM
  #21  
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Car: 1987 IROC
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Transmission: T56
Re: My turbo 4.8l 87 IROC build

well my buddy posted it up on my facebook as a "cheap" camaro and i looked at it and noticed it was mine. borrowed some money from a friend and picked it up. wasnt the people i sold it to.
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Old Oct 31, 2011 | 09:31 PM
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Re: My turbo 4.8l 87 IROC build

Originally Posted by INTIMIDATOR Z
well my buddy posted it up on my facebook as a "cheap" camaro and i looked at it and noticed it was mine. borrowed some money from a friend and picked it up. wasnt the people i sold it to.
did said buddy know it was your car?
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Old Oct 31, 2011 | 10:36 PM
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Re: My turbo 4.8l 87 IROC build

400whp on a 4.8 is a walk in the park. Probably can do alittle less turbo...61-64mm could do those numbers but a T70 gives more room.

My buddy took a stock 4.8L bottom but with rod bolts, with ported heads/230 deg cam, LS2 intake I think, made 700whp on pump gas with meth injection with a single T88 turbo

But my oh my did that car get abused the last few years! glad to see you got it back. Nice looking ride.
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Old Oct 31, 2011 | 10:52 PM
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From: Home of most 3rd gens Van Nuys, CA
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Engine: Turbo 293ci 4.8l
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Re: My turbo 4.8l 87 IROC build

nope he didnt know it was mine.

well they say i should be makin close to 600 with the setup i plan on building and thats only on like 8-9lbs of boost.
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Old Nov 1, 2011 | 12:13 AM
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Re: My turbo 4.8l 87 IROC build

Yeah just keep it simple it will make power. Push it up to a single fuel pump limit and be happy. That should be 550whp with a boost a pump kit.
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Old Nov 6, 2011 | 04:27 PM
  #26  
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From: Home of most 3rd gens Van Nuys, CA
Car: 1987 IROC
Engine: Turbo 293ci 4.8l
Transmission: T56
Re: My turbo 4.8l 87 IROC build

waiting for this guy to pull this motor trans setup so i can get the rest of the stuff i need.pickin up a stupid complete 01 SS ls1/t56 setup with harness and ecu and dunno what else but gettin it for $1800 hopefully

more parts





and bought this the other day (the one on bottom):

Last edited by INTIMIDATOR Z; Nov 24, 2011 at 01:43 PM.
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Old Nov 6, 2011 | 08:53 PM
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Re: My turbo 4.8l 87 IROC build

She looked great when you sold her, so I am sure it will be great again. Must have hurt a little to see the abuse it took. That engine must have been leaking a lot of oil to absorb that much dirt.

Are you planning any upgrades for the 4.8 short block?

Looking forward to your turbo piping build up.
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Old Nov 7, 2011 | 01:21 AM
  #28  
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Re: My turbo 4.8l 87 IROC build

nope the block is staying all stock.
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Old Nov 8, 2011 | 08:25 AM
  #29  
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Re: My turbo 4.8l 87 IROC build

Should be impressive to see what the lil 4.8L can do. Should be plenty for the street.
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Old Nov 8, 2011 | 10:45 AM
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Re: My turbo 4.8l 87 IROC build

Impressive. This is gonna be a freaking Intimidating Z.
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Old Nov 8, 2011 | 11:57 AM
  #31  
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Originally Posted by Pocket
Looks like the oil was changed often
I was thinking as I scrolled through the pics that it looked like they used cheap oil...
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Old Nov 8, 2011 | 12:27 PM
  #32  
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Re: My turbo 4.8l 87 IROC build

that poor car. glad you were able to get it back and save it. cant wait to see the progress on this build!
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Old Nov 8, 2011 | 10:30 PM
  #33  
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From: Home of most 3rd gens Van Nuys, CA
Car: 1987 IROC
Engine: Turbo 293ci 4.8l
Transmission: T56
Re: My turbo 4.8l 87 IROC build

besides the motor parts ive been thinkin about what gauges to run. since the car has a mechanical speedo and i dont wanna spend the money for the conversion box, id rather get new gauges. i dont want the usual autometer ones and i also dont wanna spend a ton of money on them.

heres what it had (only pic i have of them):


i would love these (crazy exspensive):


found this set on ebay for about $260:
http://www.ebay.com/itm/260775156254...#ht_977wt_1110

but stumbled across these and kinda like them:

(in red)


or

(in white)


good thing if i get these in the red theyres a ebay boost gauge that almost looks the same.

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Old Nov 8, 2011 | 11:15 PM
  #34  
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Re: My turbo 4.8l 87 IROC build

meh...take it from someone who's spent lots of money on gauges, you get what you pay for.
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Old Nov 8, 2011 | 11:24 PM
  #35  
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Re: My turbo 4.8l 87 IROC build

I like the way they look. But yah. Better to get quallity guages. But the red would def. look good in that car.
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Old Nov 9, 2011 | 05:18 AM
  #36  
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Re: My turbo 4.8l 87 IROC build

Ive used glowshift stuff for quite a while and you cant beat them for the money
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Old Nov 9, 2011 | 12:14 PM
  #37  
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Car: 1987 IROC
Engine: Turbo 293ci 4.8l
Transmission: T56
Re: My turbo 4.8l 87 IROC build

Yeah ive used glowshift stuff too and had no issues. Those digital led ones have a good warranty and they are also the company that makes the 3rd gen digital dash.
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Old Nov 14, 2011 | 07:41 PM
  #38  
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Engine: Turbo 293ci 4.8l
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Re: My turbo 4.8l 87 IROC build

MOAR parts came on MOAR on the way!

new part acquired!:
08 C6 z06 LS7 clutch


new part acquired!:
modded LS1 oil pan


new part acquired!:
flow mtached 60lb injectors


new part acquired!:
T56

Last edited by INTIMIDATOR Z; Nov 24, 2011 at 01:43 PM.
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Old Nov 15, 2011 | 07:24 PM
  #39  
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Engine: Turbo 293ci 4.8l
Transmission: T56
Re: My turbo 4.8l 87 IROC build

new part acquired!:
CX Racing 2.5" intercooler piping kit


new parts acquired!:
Bad *** BOV

Last edited by INTIMIDATOR Z; Nov 24, 2011 at 01:44 PM.
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Old Nov 15, 2011 | 08:12 PM
  #40  
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Re: My turbo 4.8l 87 IROC build

Bah it would take me a year to save up for all that stuff! What do you do for a living?!
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Old Nov 15, 2011 | 09:31 PM
  #41  
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Engine: Turbo 293ci 4.8l
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Re: My turbo 4.8l 87 IROC build

crappy job that i dont get paid enough. nah i sold the 91 camaro to my old boss (its still in my driveway). trust me i would never have the money to buy most of this stuff.
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Old Nov 16, 2011 | 12:42 AM
  #42  
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Re: My turbo 4.8l 87 IROC build

You sold the black one with the 5.3? I would say your cazy, which you are, but I like this build even more. Plus, its with your old INTIMIDATOR Z, which makes your name make more sence.
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Old Nov 16, 2011 | 12:47 AM
  #43  
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Re: My turbo 4.8l 87 IROC build

yeah sold the black one. but i could drive it if i want. its a weird deal but hes a cool guy.

new part acquired!:
ls1 alternator bracket


new part acquired!:
ebay short shifter
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Old Nov 16, 2011 | 12:52 AM
  #44  
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Axle/Gears: 2:73 open
Re: My turbo 4.8l 87 IROC build

Sweeet. Tour rocking the T56 for this one aren't you?
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Old Nov 16, 2011 | 01:33 AM
  #45  
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Re: My turbo 4.8l 87 IROC build

yup
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Old Nov 16, 2011 | 06:44 AM
  #46  
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Re: My turbo 4.8l 87 IROC build

Originally Posted by INTIMIDATOR Z
yeah sold the black one. but i could drive it if i want. its a weird deal but hes a cool guy.
i've had several deals like this. do a CRAP ton of work on someone's car and get rights to drive it when you want/need to. for a time there, i was driving borrowed cars that i had built while the engine was blown up in my own car. this was back when i was daily driving the camaro.
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Old Nov 16, 2011 | 11:23 AM
  #47  
Screamin86's Avatar
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From: Verona Va
Car: 86 Trans Am,03 Yukon,92 Z28
Engine: 5.3, 5.3, lb9
Transmission: th350,4l60e,700r4
Axle/Gears: 3.73,3.73,2.73
Re: My turbo 4.8l 87 IROC build

id like to know how well those ebay shifters work ive eyed them a few times when lookign for t56 parts for my 86.
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Old Nov 16, 2011 | 12:20 PM
  #48  
INTIMIDATOR Z's Avatar
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From: Home of most 3rd gens Van Nuys, CA
Car: 1987 IROC
Engine: Turbo 293ci 4.8l
Transmission: T56
Re: My turbo 4.8l 87 IROC build

Ive always wondered too. So i decided to try it out. Lookin it over it looks exactly like the B&M one and feels almost the same.
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Old Nov 16, 2011 | 01:14 PM
  #49  
Screamin86's Avatar
Supreme Member
20 Year Member
iTrader: (1)
 
Joined: Sep 2004
Posts: 1,320
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From: Verona Va
Car: 86 Trans Am,03 Yukon,92 Z28
Engine: 5.3, 5.3, lb9
Transmission: th350,4l60e,700r4
Axle/Gears: 3.73,3.73,2.73
Re: My turbo 4.8l 87 IROC build

sweet ill keep an eye out for updates lol
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Old Nov 16, 2011 | 09:06 PM
  #50  
INTIMIDATOR Z's Avatar
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Joined: Mar 2005
Posts: 1,090
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From: Home of most 3rd gens Van Nuys, CA
Car: 1987 IROC
Engine: Turbo 293ci 4.8l
Transmission: T56
Re: My turbo 4.8l 87 IROC build

new part acquired!:
big *** wastegate


new part acquired!:
Full gauge set
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