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Test Your Gearhead Knowledge: Tell Us What Engine This Weird Crankshaft Is From!


Test Your Gearhead Knowledge: Tell Us What Engine This Weird Crankshaft Is From!

One of the things that is great about having friends that are as whacked out about car stuff as we are is the fact that when they see stuff that’s BangShifty they alert us to it immediately. One such dude is Jon Wall, Dana Hard’s right hand man at Custom Auto Machine in Weymouth, Massachusetts. The machine shop dweller recently was working on an engine for a customer and in the process of looking at the crank decided, “I gotta show Lohnes this thing!” Jon thought that this odd arm would be a good one for a “Test Your Gearhead Knowledge” question and he’s right, so here we are.

As usual we will provide you no clues and demand that you come up with the answers on your own. What’s the prize for being first? How about the satisfaction at knowing you were the first person in the entire BangShift universe to guess correctly. You literally cannot put a price on that type of bragging rights. So…have at it!

Test Your Gearhead Knowledge: Tell Us What Engine This Weird Crankshaft Is From!

CRANK


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26 thoughts on “Test Your Gearhead Knowledge: Tell Us What Engine This Weird Crankshaft Is From!

  1. C1BAD66

    My WAG is it’s from a mid-’30s Pontiac straight eight.

    ‘Sure appears to be a short-stroke crank.

    1. C1BAD66

      I’ve gotta remember to put on my glasses and give a little thought before guessing on this kinda stuff!

      With paired-up rod journals, it can’t be for an inline 8.

      Maybe an in-line 4 with really fat rods and grooved inserts? LOL

      Mea culpa!

    1. Mark Wessel

      It has to be a V8. There are four rod journals with two rods per journal. I’d guess a 1967-1969 Chevy 302.

  2. carcrafter

    Pontiac 301. It is a 3″ stroke V8 crank, the position of the crank throws shows that. The rods are paired on the throws, so it can’t be an inline engine. The mains are typical larger-than-needed Pontiac. The engine was designed to be lightweight, thus the lack of counterweights.

  3. GuitarSlinger

    That thar be one o’ them thar … whatchamacallit … errr … yeah … that dad burned old thing .. one o’ them Offenbacher V16 Twin Turbo Super Duper charged thingamajigs that used ta run in that thar Canahoodian NASCUM Bumble Stock series back way the hell back when . You know !

  4. Arrow1100

    Just by the # of journals and the placement 8 cyl now a V8 or ? boxer 8 ?
    V8 my guess is an small c.i olds or buick ?
    short stroke , & wide spacing between the mains and the journals ?

    I do not know but , the Buick and Olds went from wee little c.i to 455 c.i with the same block ?

  5. Tom Fees

    Based on the standard Pontiac 301, the 301 Turbo was unique in that it had a beefier block than the 77-81 naturally aspirated, lower compression pistons, a relatively mild camshaft, a high pressure oil pump (60 psi) to ensure adequate oil to the oil-cooled Garrett TBO-305 Turbocharger,

    a rolled fillet crankshaft with 2 instead of 5 counterbalances,

    a fully baffled oil pan, and a high pressure fuel pump (10 psi), a unique single plane intake, side and turbo-specific exhaust manifolds, and an Electronic Spark Controller(ESC) using a knock sensor to retard timing when detonation is detected. The Turbo 301 used the same bearings, rings, lifters, and most external accessories used on the N/A 301s.

    The M4ME (E4ME for 1981) 800 cfm Rochester Quadrajet, unique to the 301 Turbo, had super rich “DX” secondary metering rods and a remote vacuum source for the primary metering rod enrichment circuit; the “PEVR” or Power Enrichment Valve Regulator. Boost was wastegate limited to 9 psi (+/- 1 psi) although factory settings ranged from 7 on low to 10 psi on high.

    The 301 Turbo package (RPO code LU8) mandated air conditioning (C51) due to the turbo-specific heater core box, and automatic transmission (TH350 (non-lockup) for 1980, and THM350C (lock-up) for 1981) and 3.08 positraction rear axle ratio (G80).

  6. Bob Halverson

    Chevy 262 with 3.10 stroke. Not enough counterweights to be for any performance use.

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