Opinions on a Detroit series 60 turbo

Discussion in 'Trucks [ Eighteen Wheelers ]' started by High Stepping, Apr 18, 2024.

  1. High Stepping

    High Stepping Light Load Member

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    I have a guy wanting to swap his factory Garrett on a 470hp Detroit 12.7L for a newer turbo. I'm thinking a k31 or a 171701 would work best for him. He asked about a 171702, but I don't think that's ideal. He's installing a full tilt manifold and keeping it at 470hp. He doesn't want it tuned. What are your opinions on these turbos?
     
    Last edited: Apr 18, 2024
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  3. Big Road Skateboard

    Big Road Skateboard Road Train Member

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  4. DUNE-T

    DUNE-T Road Train Member

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    I got k31 on one truck and 702 on another. Both trucks are identical except turbos.
    702 is a waste below 550hp, the turbo lag is very annoying, especially with 10 speed.

    K31 is a good all around turbo, be it 470hp or 550. If your customer is staying stock, that's a better choice for him, good power and mpg.
     
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  5. High Stepping

    High Stepping Light Load Member

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    Thank you for the replies. I'd like to hear from someone who runs a 701 turbo, too. He's wanting a non-wastegate turbo, so I think the 701 would be better suited for the lower hp.
     
  6. Big Road Skateboard

    Big Road Skateboard Road Train Member

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    I tried maybe 5 different turbos on my older engine over 2 months. The K31 was an easily noticeable improvement over the three non wastegated ones I tried.

    Factory on that engine was the S400, and it was gutless. The K31 stayed.

    I'm headed home for a minute. If I get to swing by the shop I'll let you know the #'s.

    FYI, all 4 engines responded best with the K31

    92 DDEC II 11.1
    97 DDEC III 11.1
    97 DDEC III 12.7 500
    98 DDEC IV 12.7 500
     
    Last edited: Apr 18, 2024
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  7. benjamin260_6

    benjamin260_6 Medium Load Member

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    The K31 is definitely the best option for a stock 470
     
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  8. DDguy

    DDguy Light Load Member

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    Hands down the K31 will come out on top for 470 the 701 aint bad at all but it will just lag abit more the K31 is good up to 550-575hp where it kinda runs outa steam then
     
  9. little cat 500

    little cat 500 Road Train Member

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    i didn't like the k31 was limited to 30psi boost so i did the right thing and tightened. the waste gate up 5 turns right at 40 psi now.
     
  10. DDguy

    DDguy Light Load Member

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    Untill it says see yah thats too much lol they seem to like to stay 35 or under for the most part from what ive seen
    How long have you had yours at 40 PSI
     
  11. little cat 500

    little cat 500 Road Train Member

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    couple weeks was a turd stock motor is set at 550
     
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