Budget Build Twin Turbo LT1

Discussion in 'Project Progress' started by hoppin5478, Aug 5, 2015.

  1. hoppin5478

    hoppin5478 Veteran Member Lifetime Gold Member

    487
    73
    Jul 20, 2015
    Tucson, AZ
    Here is the progress on my twin turbo LT1 build. Sorry I started the thread late as I already have been working on it for about a year and have done a poor job documenting and taking pics. Please be open minded as the point of the build was to try to build something that would be super cool on a budget. All of the labor has been completed by brother and myself. I have been a regular on ebay, craigslist and internet price shopping to try and keep the build budget friendly. I started with a 78 Z28 4 speed car my Dad donated to me, pretty complete and rust free but in rough shape.

    Lance Truck etc 7-20 059.jpg

    and the engine bay, started a TPI conversion before deciding to go all in.

    camaro build 338.jpg
     
    Last edited: Jul 11, 2017
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  2. AllensaurusRex

    AllensaurusRex Veteran Member

    378
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    May 22, 2013
    Murfreesboro TN
    Cool, whats the next steps?
     
  3. hoppin5478

    hoppin5478 Veteran Member Lifetime Gold Member

    487
    73
    Jul 20, 2015
    Tucson, AZ
    I started by pulling the original 350 that was in very poor condition. I spent weeks cleaning and prepping the subframe and then painted it with Summit epoxy primer followed by a Summit single stage gloss black. All of the front end components were replaced. Due to cost I opted to go with poly bushings and mounts. Please excuse all the seran wrap I used to help avoid scratches during assembly.

    camaro build 010.jpg
     
    Last edited: Jul 11, 2017
  4. hoppin5478

    hoppin5478 Veteran Member Lifetime Gold Member

    487
    73
    Jul 20, 2015
    Tucson, AZ
    I then moved on to the brakes. I hit the pull a part yard and pulled 79 caddi spindles for the 1LE upgrade and S10 parts for the rears. To help keep cost reasonable and stay true to the build I rebuilt my front calipers, turned the rear rotors, I pulled and reused all the S-10 ebrake cables and lines. Total cost with new pads, bearing, seals, 1LE rotors and Vette master cylinder was just over $300.

    Front
    camaro build  8-8-15 010.jpg
    Rear
    camaro build 006.jpg
     
    Last edited: Jul 11, 2017
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  5. hoppin5478

    hoppin5478 Veteran Member Lifetime Gold Member

    487
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    Jul 20, 2015
    Tucson, AZ
    Off to Brother Brian to install the LT1 he rebuilt for me. Without him and his crazy knowledge/abilities none of this would be possible for me.

    WP_20150720 1.jpg
     
    Last edited: Jul 11, 2017
  6. hoppin5478

    hoppin5478 Veteran Member Lifetime Gold Member

    487
    73
    Jul 20, 2015
    Tucson, AZ
    Brother Brian pulled the LT1 apart and inspected it. Lucky for me it was in really good shape despite being filthy and neglected. To keep it a budget build we used a basic rebuild kit and he mildly ported/cleaned up the heads. Here is the motor installed.

    WP_20150720 2.jpg WP_20150720 3.jpg
     
    Last edited: Jul 11, 2017
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  7. hoppin5478

    hoppin5478 Veteran Member Lifetime Gold Member

    487
    73
    Jul 20, 2015
    Tucson, AZ
    We decided to dump the optispark and go with LS truck coils. I got all 8, wiring harness and brackets off of ebay for $120 shipped. The engine is being controlled with a Megasquirt 3, with expansion board that Brian assembled from scratch and wired the motor with full sequential utilizing the optical pick up from the original optispark. In the spirit of the budget build I went with two T3/T4 hybrid chinese turbos for $190 a piece. We'll see how they work out, I can always upgrade later after the budget build is complete. Brian spent hours upon hours fabbing the correct D port flanges for the turbo headers and re-working the headers, by cutting and welding the new flanges to fit in the 2nd gen engine bay. He also fabbed the stainless downpipes as we went through the best placing for the turbos. I'll have to rework the inner fender wells but no biggie considering all the other stuff that has been done so far.

    camaro build 017.jpg camaro build 021.jpg camaro build 019.jpg
     
    Last edited: Jul 11, 2017
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  8. hoppin5478

    hoppin5478 Veteran Member Lifetime Gold Member

    487
    73
    Jul 20, 2015
    Tucson, AZ
    Heading over to work on installing the turbo oil feed and return as well as misc. plumbing this morning. Hope to have it fired up this week and see what challenges we run in to. Just waiting on the Seimens 60lb injectors and a couple other small parts but can't I can't wait to hear it run.......
     
  9. Thunderkyss

    Thunderkyss Veteran Member

    222
    0
    Sep 16, 2012
    Texas
    How are you using the optical pickup from the optispark if you dumped the optispark?
     
  10. bigdav160

    bigdav160 Veteran Member

    594
    5
    Jan 11, 2006
    Klein Texas
    Subscribed. I think he's using the optical sensor but not the distributor part of the optispark. (no ignition coil connected to it)
     

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