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1989 IROC 305 TPI/ T5 to 6.0 LQ4/ T56

This is a discussion on 1989 IROC 305 TPI/ T5 to 6.0 LQ4/ T56 within the LSx Retrofit and Swap forums, part of the LSx Technical Help Section category; Starting a thread for my 6.0 swap into my 89 IROC convertible. I bought the car 10 years ago and ...

  1. #1
    Member pop6482's Avatar
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    Red/Black
    1989 Camaro IROC

    1989 IROC 305 TPI/ T5 to 6.0 LQ4/ T56

    Starting a thread for my 6.0 swap into my 89 IROC convertible. I bought the car 10 years ago and have been talking about doing the swap for the past few years. The time has finally come!!!!!!! The measly 305 is tired and smokes like a chimney and runs like shit at times. Plus I think my wife's Nissan Altima has more horsepower. I've been reading and buying a lot over the past few months, and I think I am ready to start. Short block is going to Jensen's Engine Technologies in Nescopeck, PA. on Thursday.He does great work and I highly recommend this shop if you are located in Eastern PA. He will disassemble, check the bottom end ,and assemble the engine.

    Andy Jensen's Engine Technologies. High performance engine builder in Pennsylvania.

    Here is what I'm working with:

    ENGINE:
    6.0 LQ4 short block (will stay stock)
    PRC Stage 2.5 5.3L heads
    TSP Torquer V2 232/234 .595/.598 112 LSA
    TSP Ported Oil Pump
    LS2 Timing Chain
    LS6 Intake
    LS1 oil pan
    Hawks/ Stainless Works LT's 1 3/4 w/3" collector, custom Y & Elec. cutout
    stock ls1 clamshells, spohn motor mounts

    accessories/sensors/miscellaneous parts (stock LS1)

    TRANSMISSION:
    2002 T-56 w/ PCM and wiring harness
    TICK Master cylinder
    Spec Stage 2 Clutch
    Spec flywheel
    skip shift elim.
    HAWKS T-56 swap crossmember
    2002 Center console (may or may not use)

    Suspension
    BMR subframe connectors
    UMI torque arm
    UMI panhard bar
    Eibach sportline springs
    BMR strut tower bar

    I attained a majority of these parts over the past 3 months. I was patient and found many great deals during Black Friday and also on Ebay and LS1tech's classified forums. I had every intention of finding a donor LS1 car which I'm sure would have been a little bit cheaper, but I feel that I have gotten a number of great deals.
    This is my first swap of any motor, so I am going to be learning a lot throughout this entire process. With the help of my brother (cpop98ws6), a few friends and you're input, I'm hoping to have the car on the road this spring. I'm sure there will be a lot of head scratchers and questions throughout this process and I would like to thank you in advance for any input!

    Engine goes to the shop Thursday and I'm going to start dismantling the slow, tired and worn out 305 this week. I'm not sure how much I'll be able to get on here to update, but I'll try to include pictures and small descriptions of whats going on.

  2. #2
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    Sounds like you are going to turn your IROC into a certified beast with this swap. Looking forward to some pics.

  3. #3
    Member pop6482's Avatar
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    I just hope everything goes smooth!

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    Senior Member cpop98ws6's Avatar
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    I hope it goes smooth too, but chances are we will have some kind of problem. But that's to be expected with a build like this.
    Callies 383, Trick Flow 225, Rapid Motorsports Dominatior 2 X cam, ls6 ported oil pump,42lb injectors, FAST 92/92 , ASP underdrive pully, eletric water pump, Pacesetter LT's, Pacesetter ORY, Magnaflow catback, e-cutout, Yank SS 3600, Performabuilt stage 2 4l60e, Strange S60 ,4.10s, Detroit Truetrac, (UMI) - Adj. LCA, Adj. tunnel mount torque arm, Adj. panhard bar, Drag bar, subframe conectors, shock tower brace. 465rwhp-438rwtq 11.09@119.90.

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    Moderator Firebirdjones's Avatar
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    Great swap into a smaller lighter platform than a 4th gen. It should be a screamer. I had an 88 L98 350 Iroc, loved that car,,,,,sssshhhhh

    Check with Hawks Third Gens, they have done a ton of these swaps and sell all the conversion parts to make your swap a piece of cake.

  6. #6
    Member pop6482's Avatar
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    I just got my headers and a few other parts from Hawks. I've also been reading a lot on thirdgen.org. There are a bunch of build threads there also.

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    Sounds like its goingt o be a hoot to drive.

    When do you plan to update the rear....about the 1st power shift? haha

    Glad to see you are working on it. Cant wait to see the girl go down the track next spring/summer.

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    None Shall Pass Knight's Avatar
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    Subscribed.

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    1999 Camaro 3800 Y87

    This is awesome! I cant wait for pics and updates. Good luck on everything mang.

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    Member pop6482's Avatar
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    Here are some pics of what I'm working with.....bought an engine hoist last night. Hoping to start ripping into itthis weekend or early next week.

    [IMG][/IMG]













    Last edited by pop6482; 12-06-2011 at 07:04 PM.

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    Looks like Christmas to me!

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    Member pop6482's Avatar
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    Santa Clause......I mean the UPS guy was at my house 3 times last week.

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    Member pop6482's Avatar
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    Spent a few hours in the garage today. This is the easy part!
    IMAG0495.jpg

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    Awesome...........freaking awesome.

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    Member pop6482's Avatar
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    Red/Black
    1989 Camaro IROC

    IMAG0500.jpg

    Engine and Trans just came out of the car about an hour ago.
    Jensen (engine shop) called today and said that the crankshaft is good, but........pistons and rods are going to need to be replaced. It needs a slight bore and with the stock pistons he said it would be a little sloppy. So I'm going with Manley rods and pistons. Might as well build it strong while it is apart. Nothing like spending more money, but that was to be expected with this build.

    Next step is to completely clean the engine bay and trans tunnel while it is still up on the jack stands. I feel like I am ahead of the game being that the motor won't be finished until after the holidays. This will allow me time to prep everything and also save some more cash.

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    Do it once. Do it right. I think that is Kanter's motto and I agree 100%.

  17. #17
    Member pop6482's Avatar
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    Quote Originally Posted by pajeff02 View Post
    Do it once. Do it right. I think that is Kanter's motto and I agree 100%.
    I totally agree with you Jeff! No shortcuts here that is for sure.

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    Going to run the same wheels and tires? I cant wait to see this puppy go down the track.

  19. #19
    Member pop6482's Avatar
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    Same wheels for now. I'm sure later on down the road I'll get some drag rims. Just want to get the car on the road this summer and hopefully save for a rear!

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    Quote Originally Posted by pop6482 View Post
    Same wheels for now. I'm sure later on down the road I'll get some drag rims. Just want to get the car on the road this summer and hopefully save for a rear!
    Without question I think you will have it on the road. The rear in it has its days numbered.....lol

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