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Thread: Turbo Olds

  1. #1
    Administrator 88hurstolds's Avatar
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    Default Turbo Olds

    Well I've finnaly decided to start researching my twin turbo build with the Olds DX350 I have laying around and found some good inspiration:

    http://www.hotrod.com/techarticles/e...ock/index.html

    My plan is to research the Buick motors to gather the right clearances, CR, Bore, Stroke and Head Flow to obtain a 442 c.i. monster. My goal is 600hp but I can see this putting out around 800hp which is crazy
    Stay tuned...

    Here are some specs that come from a 265 c.i. Buick V6:
    Engine Builder's Specs
    All dimensions in linear inches, except as noted.


    SHORT BLOCK
    Displacement: 265.2 ci
    Bore x stroke: 3.940 x 3.625
    Rod length: 6.300
    Rod/stroke ratio: 1.74:1
    Block deck height: 9.530
    Piston compression height: 1.400
    Piston deck height: 0.0175
    Piston volume: -35 cc (dish)
    Head gasket compressed volume: 8.6 cc
    Compression ratio: 8.46:1
    Bore finish: Sunnen 623
    Piston-to-wall clearance: 0.0045 cold
    Main-bearing clearance: 0.0022
    Rod-bearing clearance: 0.0020
    Rod side-clearance: 0.012
    Crankshaft thrust clearance: 0.005-0.007
    Piston compression-ring endgap: 0.030/0.030
    Piston oil-ring rail endgap: 0.012 minimum
    Floating piston pin-to-rod: 0.0012
    Piston-to-head clearance: 0.0565
    Engine oil: Lucas 10W30 synthetic, 7 quarts with filter


    CYLINDER HEADS
    Valve size: 1.940/1.600
    Combustion-chamber volume: 50 cc
    Intake-port volume: 156 cc before porting
    Max flow as ported: 250/190 cfm @ 28 in H20
    Exhaust/intake flow: 76%
    Valvespring od/id: 1.509/0.697
    Valvespring seat pressure: 122 lb @ 1.790
    Valvespring open pressure: 311 lb @ 1.256
    Valvespring coil-bind height: 1.150


    CRITICAL FASTENERS
    Values are with ARP lube, except as noted.
    All studs: Bottom hand-tight (dry or light oil)
    ARP main stud nuts (1⁄2): 100 lb-ft
    ARP main stud nuts (7⁄16): 60-65 lb-ft
    ARP main stud nuts (3⁄8): 45 lb-ft
    ARP main cross-bolts (7⁄16): 55-lb-ft nominal*
    ARP main cross-bolts (3⁄8): 35 lb-ft nominal*
    ARP head stud nuts (7⁄16): 80 lb-ft
    Crower rod bolt (7⁄16): 0.005-0.007 stretch @ minimum of 75 lb-ft
    ARP balancer bolt (3⁄4): 200-250 lb-ft (oil)
    TA rocker-shaft-stand stud nuts (7⁄16): 55 lb-ft (oil)
    Cam bolt: 45 lb-ft (red thread-locker)
    *Tighten after vertical main stud nuts; adjust torque as needed to maintain a round main bore as measured with a dial-bore gauge.

    CAMSHAFT
    Type: Hydraulic roller-tappet
    Grind: Comp Cams Magnum 3108S
    Duration, 0.006 tappet lift: 271/271 degrees
    Duration, 0.050 tappet lift: 215/215 degrees
    Lobe displacement angle: 114 degrees
    Installed intake centerline: 114 degrees
    Lobe lift: 0.334/0.334
    Rocker-arm ratio: 1.60:1
    Valve lift at zero lash: 0.534/0.534
    Valve lash: Zero plus 1⁄2 turn
    Pushrods: 5⁄16 od x 8.600 long
    Piston-to-valve clearance: Ample
    Camshaft thrust: 0.005-0.015


    FUEL, SPARK AND AIR
    Engine management: MoTeC M-600
    Fuel injectors: MSD 72 lb/hr
    Fuel pressure: 50-psi base, increasing 1 psi per 1 psi of boost
    Throttle-body: Wilson 90 mm
    Ignition: GM Gen III coil-packs
    Spark plugs: Champion C63YC, 0.030 gap
    Fuel (on dyno): VP-112, 112 octane
    Max boost: 18.36 psi @ 5,700-5,800 rpm
    Timing: 38 degrees base; 22 degrees at max boost


    PERFORMANCE
    Max torque @ rpm: 668.4 lb-ft @ 4,100
    Max power @ rpm: 707.8 hp @ 5,700
    Peak BMEP: 380 psi
    Power/ci: 2.67 hp/ci
    Lightning Rods repair service:CLICK HERE
    Seller Feedback:CLICK HERE
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  2. #2
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    Ah, that would be rather different. :icon14: Personally, I haven't seen any turbocharged Olds motors except for a prototype that John Beltz, Oldsmobile's chief engineer, oversaw in 1969. Check out the video below to see the turbo prototype engine and two others (one a Can-Am engine and the other being Olds's version of the Hemi). Hope that the research works in your favor and that the project becomes a reality!

    http://www.youtube.com/user/vistacru...39/jJMcpixWLO0

    All the best,
    Doug

  3. #3
    Administrator 88hurstolds's Avatar
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    Heres what thesemotors are capable of:
    http://www.youtube.com/watch?v=5xK8LmUws6Y

    1207HP @ 7100rpm, 1368HP @ 7600rpm.

    Enjoy!
    Lightning Rods repair service:CLICK HERE
    Seller Feedback:CLICK HERE
    1988 H/OCA Advisor
    88 H/O #1 of 4
    88 CSC White/Claret - T-tops
    88 H/O Triple Black
    87 442 Black/Gray - T-tops
    85 442 White/Blue - T-tops
    85 442 White/Blue - T-tops
    85 442 White/Claret - T-tops
    85 442 White/Sage
    84 H/O Aero Commemorative #2199 - Sunroof
    83 H/O #2400 Sand Gray - Sunroof
    83 H/O #1607 Sand Gray - T-tops
    83 H/O #727 Maple
    "Keep them Rockets lit!"

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