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1981 Caprice Classic 4.8L Single Turbo

This is a discussion on 1981 Caprice Classic 4.8L Single Turbo within the Forced Induction forums, part of the LSx Technical Help Section category; I have owned this car for years, and it has seen multiple combinations. It is currently under the knife AGAIN ...

  1. #1
    Junior Member FurchesPerformance's Avatar
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    1981 Caprice Classic 4.8L Single Turbo

    I have owned this car for years, and it has seen multiple combinations. It is currently under the knife AGAIN getting reworked, but I figured some of you would find last seasons combination rather entertaining!



    1981 Caprice Classic
    200k Mile 4.8L with Comp Thumpr (completely wrong cam for the combo, but sounded awesome!) and BTR Springs
    Holley Modular Mid-Rise with Flipped Base, 1" Spacers & 90mm Throttle Body
    80lb Ford Racing Injectors and 3 Bar 2004 GTO OS
    4L80E Full Manual Reverse Pattern with Transbrake
    Old Garrett/ Precision T4 70mm Journal Bearing & Turbonetics RG45

    This combination @ 20psi on E85 was one of the funnest street cars I have ever owned.





    I spent a lot of time on the details of this car. The stock steering wheel was adapted to a tubular column with Strange quick-release hub; the fender-exit exhaust came through a billet flange where the marker lamp used to be; the Holley Dominator fuel pump was submerged in the tank. Just a lot of thought and attention.







    The car definitely made the rounds and turned out to be an awesome conversation piece for the shop, but as with any of these projects....It is never good enough. The motor found its way into a truck out in Worcester area, and the transmission is in a single turbo Trailblazer SS now. Once again, the car is getting completely gone through with the goal of making it even better than before.





  2. #2
    Spaz is My Mentor SMWS6TA's Avatar
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    Navy Blue Metallic
    98 T/A w/a little mods...

    One hell of a sleeper.......some nice detail there.



    What you looking at doing now?

  3. #3
    Junior Member FurchesPerformance's Avatar
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    Quote Originally Posted by SMWS6TA View Post
    What you looking at doing now?
    We are actually hanging twins on the nose of the car this year with a different motor/ trans combo. Biggest goal this season is to put the car on a diet (which I have done previously, but still super overweight). Actually, the car weighed 4040 this year with me in it if you can believe that!

    Once we have made a little more progress, I will start a build thread (or maybe even just keep this one updated).

  4. #4
    Spaz is My Mentor SMWS6TA's Avatar
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    Navy Blue Metallic
    98 T/A w/a little mods...

    Is it tub in the back? small or large tire? what rear?


    Lose that front bumper and that will help...that and a tubular front end.
    Last edited by SMWS6TA; 02-20-2015 at 03:14 PM.

  5. #5
    Junior Member FurchesPerformance's Avatar
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    Quote Originally Posted by SMWS6TA View Post
    Is it tub in the back? small or large tire? what rear?


    Lose that front bumper and that will help...that and a tubular front end.
    The car is not Tubbed. Small tire, stock rear rails, currently on a 8.5" 10 bolt.

    Last season it was on a typical 28" radial, but that tire actually looks small on this car. I don't plan on class racing or anything like that, so I think I will stuff the 295/65 radial back on.

    The front rad support and rails are getting the tubular treatment this year to shed a few lbs and hang the turbos from.

  6. #6
    Junior Member 99ss405's Avatar
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    you have a lot of talent. Is that your 89 TTA beside the caprice ?
    Last edited by 99ss405; 02-20-2015 at 04:12 PM.

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    Moderator 35th-ANV-SS's Avatar
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    Red
    02 35th LE Camaro SS

    Finally got some time to really look at this. Very nice!

  8. #8
    Junior Member FurchesPerformance's Avatar
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    [QUOTE=35th-ANV-SS;2920179]Finally got some time to really look at this. Very nice![/QUOT]

    Thanks!

    Quote Originally Posted by 99ss405 View Post
    you have a lot of talent. Is that your 89 TTA beside the caprice ?
    Thank you. The TTA was actually at a friends shop. Cotton's specializes in Turbo Buicks / Grand Nationals. They have a parking lot full of cool turbo 3.8 cars.
    __________________________________________________ ____________________________________

    Pulley the trigger on some 69mm China GT45s. Delivery is scheduled for Friday lol

  9. #9
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    Black & Blue
    '02 WS.6 / '07 Suburban

    This is one damn cool build. I like it!

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