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Craigslist Find: Roto-Master Turbocharger Kit For A Small-Block Mopar

Craigslist Find: Roto-Master Turbocharger Kit For A Small-Block Mopar

I’ve heard of the motorhome turbocharger kits for Chrysler big-blocks before, but this just might be the first time I’ve seen a similar system for a Chrysler small-block. Manufactured by Roto-Master and utilizing a Rayjay turbocharger, these setups (of which I know jack-all about) are more suited to low-PSI operations and were meant more as a power supplement rather than a power adder. What do I mean by that? This kind of setup isn’t meant to really make thumping amounts of horsepower or torque. Instead, it’s better suited, in its stock form, as a way to combat power loss, such as in higher elevations. I don’t know how viable this would be on a decently built engine, and I will defer to those with more experience than I for that answer, but I’d suspect that the cost of getting this system to push enough PSI to make things worthwhile would be similar, if not higher, than doing some custom header/pipe work and using the turbocharger off of a Cummins inline-six. Am I wrong?

Craigslist Link: Roto-Master/Rayjay Turbocharger Kit for Small-Block Chrysler

rayjay2 rayjay3 rayjay4(Thanks to Ron Ward for the tip!)


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10 thoughts on “Craigslist Find: Roto-Master Turbocharger Kit For A Small-Block Mopar

  1. sbg

    draw through sucks. Problems go like this:
    1) no way to intercool
    2) heat soak (after all, beside heating the air with the compressor, the carb is now located over the exhaust manifold)
    3) that little whirring device that the fuel must go through, pulls the fuel out of the air.

    they make glorious turbo noise, but make more hp with a thumpr cam.

    1. Rustowner

      SBG, you’re pretty far off on your assumptions. See the responses below and maybe do a little research on the topic of draw through systems. While older and not used often anymore, they have some superior attributes compared to blow through designs. Just because you’re not familar with the set up, or understand how it properly works, don’t knock it.

    2. Rustowner

      BTW, the idea was not to make sick HP with these setups. They were especially designed to “add” horsepower that was lost at higher altitudes ( ie – towing in the mountains, airplanes, etc) without compromising the vehicles driveability, just as the article stated. They do make horsepower, but I’d have to agree that a proper bumpstick, induction and exhaust set up could could make more usable HP with less fuss.

  2. john

    No need to intercool, as it will ice up the intake, and you will never find a better atomization of fuel and air. Draw through is a great design. You obviously have no clue, maybe you should understand how a draw through works before you blabber misinformation.

    1. Rustowner

      John, I’m with you 100%. Fellow above doesn’t seem to understand at all how the system works in a draw through set up. Manifolds can ice up on cold days (hence the need for a heat riser), no need for intercooler and a atomization is excellent when properly configured. Got to love the knee jerkers around here; If they don’t understand it so it must suck! LOL.

  3. dirwood

    I think your grand would be better spent on a pile of “j” bends and a new garrett t-4, those cast manifolds look pretty restrictive,blow through on a holley isnt really that complicated.

  4. loren

    I had that same kit on a SBC pickup truck for a short while. It’s kind-of a dog with lots of weird tight bends, compromised everywhere to keep the carb in the stock location which I guess is where early turbo-conversion buyers wanted it. I did keep it all as a curiosity, the turbo itself may go on a ’70s-style build.

    1. loren

      And I should add, search “Martin Turbo Systems” (long out of business) for more info. Roto-Master built the turbo, not the kit.

  5. john

    You need tight square bends on a draw through to keep the fuel in the air, otherwise you will have some cylinders lean, others rich. But everyone thinks they are turbo experts on the internet.

  6. RacerRick

    That kind of looks like an old Martin turbo kit. I have never seen one for a mopar before.

    If it is a Martin that looks like the original turbo, which is about the same as a T04B V1/V2. The bypass valve in the intake is probably set for 6psi since this is a obviously a truck setup.

    It is missing some pieces in those pics, but it is still a cool setup.

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