RallyBob's Garage :: 1975 Opel Manta
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  1. General Information

    New Mexico car, zero rust on chassis.


    Steinmetz fender flares, all glass except windshield replaced with lexan.


    All TIG-welded mild steel DOM rollcage.

    Gas pedal...


    Phase 1: 11.5:1 compression 1958 cc's, lightened and profiled crankshaft, multiplate clutch, big-valve 1.9 head fully ported, Cam Techniques cam, roller rockers, 48 mm Dellorto carbs, dry sump, remote electric water pump, ZF 1:1 5-speed transmission. Est:135 whp

    Phase 2: 7.5:1 compression 1989 cc shortblock, same cylinder head, custom Cam Techniques turbo cam, custom equal length thick-wall header, Garrett GT3076 .82 A/R ball bearing turbo, JGS wastegate, stock Opel EFI intake with 65 mm Ford TB, S.D.S. fuel injection, G-Force close ratio straight-cut dog engagement 5-speed transmission. Est:375 whp

    Phase 3: 8.5:1 compression 2346 cc stroker engine, big valve 2.2 head max ported, twin-scroll GT37 turbo with twin-scroll custom header, custom Audi-style intake with individual TB's, .552" lift/256 degree @ .050"/115 degree LSA custom cam. Est:520 whp

    Lightened and gusseted stock crossmember with anti-dive geometry removed. Custom tubular upper and lower a-arms, coil-over shocks, 4-link rear suspension w/watts linkage, Toyota 8" rear axle with chromoly spool.


    13 x 9 Keizer 3-piece alloy with 255/40-13 Hoosier A6 DOT radials, 13 x 8 BWA Sportstar with Hoosier RC-4 (treaded) for wet conditions.

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