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GM B-Body Forum, 77-79 Caprice/Impala Forum

A forum for all the owners and enthusiasts of General Motors B-Bodies from 1965-1996, but dedicated to the owners of 1977-1979 Impalas and Caprices. Join up now!


    SBC Twin Turbos

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    Sweet Seventy9
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    SBC Twin Turbos

    Post  Sweet Seventy9 on Fri Sep 12, 2014 12:35 pm

    Oooh, Nice!

    http://www.ebay.com/itm/New-Twin-Turbo-SBC-Chevy-Corvette-Camaro-1000-HP-Z28-SS-283-305-327ci-350ci-400-/271211903149?pt=Motors_Car_Truck_Parts_Accessories&fits=Year%3A1977|Model%3ADelta+88&hash=item3f257d38ad&vxp=mtr



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    solo79
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    Re: SBC Twin Turbos

    Post  solo79 on Fri Sep 12, 2014 7:20 pm

    YES, I've been seeing these lately priced ridiculously low. I am seriously thinking about getting this for the 327 in the KITT car. I've already put $5,000 in that engine with only the best parts, so a twin turbo would be a nice upgrade. Of course there's that pesky "is there enough room" in my engine bay thing... Plenty of room in a B-Body though!


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    Sweet Seventy9
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    Re: SBC Twin Turbos

    Post  Sweet Seventy9 on Fri Sep 12, 2014 7:49 pm

    solo79 wrote:<snip> Plenty of room in a B-Body though!

    My thoughts exactly! Very Happy


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    1977 Caprice Coupe x3, Sedan x3
    1978 Impala Landau x1, Sedan x2, Station Wagon x1
    1978 Caprice Landau x1, Caprice Coupe x2
    1979 Impala Coupe x2
    1979 Caprice Coupe x7, Landau x4, Estate Wagon x1
    1981 Impala Coupe x1
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    1983 Caprice Sedan x1
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    Re: SBC Twin Turbos

    Post  GM B-Body Forum on Fri Sep 12, 2014 8:12 pm

    wow thats incredibly cheap! I could go this route and make good numbers or i could spend about 1500 to swap a set of vortec heads on that would only get me near 375 hp. I wonder how much boost a stock small block can handle, probably somewhere around 5-10 psi.


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    Sweet Seventy9
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    Re: SBC Twin Turbos

    Post  Sweet Seventy9 on Fri Sep 12, 2014 11:12 pm

    GM B-Body Forum wrote:wow thats incredibly cheap! I could go this route and make good numbers or i could spend about 1500 to swap a set of vortec heads on that would only get me near 375 hp. I wonder how much boost a stock small block can handle, probably somewhere around 5-10 psi.

    These would work nice with the turbos and still be less than the vortec heads alone.



    http://www.ebay.com/itm/Chevy-350-PEREFORMANCE-Aluminum-Heads-PAIR-SBC-Assembled-STRAIGHT-plug-/261474304894?pt=Motors_Car_Truck_Parts_Accessories&hash=item3ce115437e&vxp=mtr

    or these

    http://www.ebay.com/itm/chevy-small-block-350-202-angle-plug-heads-/301092792039?pt=Vintage_Car_Truck_Parts_Accessories&hash=item461a8766e7&vxp=mtr

    Or even better -

    http://www.ebay.com/itm/SBC-dart-pro-1-230-aluminum-heads-/251641393951?pt=Motors_Car_Truck_Parts_Accessories&hash=item3a96fef31f&vxp=mtr

    or even these -

    http://www.ebay.com/itm/Gm-performance-parts-aluminum-fast-burn-sbc-heads-/291237635515?pt=Race_Car_Parts&hash=item43cf1da5bb&vxp=mtr


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    1977 Caprice Coupe x3, Sedan x3
    1978 Impala Landau x1, Sedan x2, Station Wagon x1
    1978 Caprice Landau x1, Caprice Coupe x2
    1979 Impala Coupe x2
    1979 Caprice Coupe x7, Landau x4, Estate Wagon x1
    1981 Impala Coupe x1
    1983 Impala Sedan x1
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    Machine-De-Zine
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    Re: SBC Twin Turbos

    Post  Machine-De-Zine on Mon Oct 20, 2014 9:21 pm

    Did anyone notice that the one vehicle this kit is listed as "compatible with" is a 1977 Oldsmobile Delta 88!?  Typo?

    Also, those tall "round-port" exhaust gaskets seem to suggest that the heads' exhaust ports, if left stock (as cast) would not be so perfectly suited to those headers.

    Consider that an engine should be built from the ground up, either for a turbo, or not for a turbo.

    Correct compression ratio for turbo implementation stands out as a concern that must be considered before the build. 8.0:1 -or- 10.5:1 - this makes a huge difference.
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    Re: SBC Twin Turbos

    Post  GM B-Body Forum on Tue Oct 21, 2014 8:30 pm

    Also those Chinese made turbos use cheap bearings and are under oiled and will probably wear out in 5- 10K miles. Ive decided to stay away from that, and just build an NA motor. And no you definitely dont want to run high compression with a power adder!


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    1979 Caprice Sport Coupe, 400hp Vortec 350, Th350, GM 8.5 w/disc brakes, 3.90 gears Detroit Truetrac, 2.5" stainless duals w/ x-pipe, Dynomax race bullets.
    1984 Caprice Sedan, 305 motor, 700r4
    1978 Caprice Sedan, 305 motor, th350
    1993 L99 Caprice, 4.3 v8, 4l60 trans
    1972 Ford F-100, 302 windsor, c4 trans
    2001 BMW E46 330i, 3.0L

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