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B20 turbo 120-130

posted by  someone claiming to be 122s owner on  Tue Jan 6 05:58 CST 2009 [RELATED]

Looking at diffrent kinds of turbo setups for the b20 motor and I was looking at the suck type where the carb is before the turbo. Which is bolted to the intake of the turbo. This setup doesnt need a carb box to equalize turbo pressure. Has anyone ever done thise setup using a 40 dcoe carb?








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    B20 turbo 120-130

    posted by  Rhys on  Tue Jan 6 12:09 CST 2009
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    last visit: Tue Nov 20 10:22 CST 2012
    [RELATED]

    It's far easier to do a draw-through system than blow through. Most aircraft piston engines used the former. One advantage is that the fuel as it atomizes produces a cooling effect similar but not equal to an intercooler. Pressurizing a carb, and having sealed pass-throughs for the linkage, is a hassle.
    I used to work on an early 240Z Datsun using a single 2 inch SU carb on a draw-through system. Short plumbing, instant throttle response, killer power.








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    B20 turbo 120-130

    posted by  Volvo4dv8 on  Tue Jan 6 11:06 CST 2009
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    last visit: Thu Oct 23 20:06 CST 2014
    [RELATED]

    Imagine an exploding ball of fire coming from under your hood!
    I think that's why you don't see suck through turbo systems much.








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      B20 turbo 120-130

      uid 4846's pic
      posted by  JohnMc on  Wed Jan 7 02:31 CST 2009
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      last visit: Thu Oct 23 07:42 CST 2014
      [RELATED]

      Sure wouldn't want to use an intercooler, I cringe thinking about that much pressurized air/fuel mixture sitting just the other side of the intake valves, waiting for a slight backfire of some sort.

      If you are going to the effort of turbo-ing a B20, go ahead and turbo a D-jet B20, and replace the D-jet ECu with something modern and programmable. Like Megasquirt. Might even cost less that a DCOE. And much more precise and flexible and easier to set up and tune. Plugging a laptop in vs. ordering expensive little metal bits and swapping and praying.
      --
      '63 PV544 rat rod, '93 Classic #1141 245 +t








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        B20 turbo 120-130

        posted by  Sean Boyle on  Tue Jan 13 16:11 CST 2009
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        last visit: Tue Jan 13 16:12 CST 2009
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        Dale from Avalance Performace had one for sale a while back that he was trying to sell cheap that would be a good start to what you are trying to do. I can send you an email with a pic of it if you post your email address. It had an SU and needed some finishing. You could shoot him an email via his website and see if he still has it.

        http://www.avalancheperformance.com/index.htm

        What you are trying to do can work just fine, but you would need to be careful. Old Volvo's have high compression and cast pistons. With this type of setup fuel distribution would not be very precise and you would need to run real rich when you are into boost to keep from detonating and wrecking your motor. Also some timing retard such as an MSD BTM would be helpful. If you are careful and keep the boost modest you would have a fun car, and the way you are trying to go is probably the simpest way to get it done.

        I've got a turbo project going in my 122 also. I'm finally getting started on it again after doing other things for the past 9 months. You can check it out in the link below if you are interested.

        http://forums.turbobricks.com/showthread.php?p=1729999

        Also on ebay is an EFI setup based on the extrudabody throttle bodys.

        http://extrudabody.com/

        http://cgi.ebay.com/ebaymotors/Volvo-P1800-122-140-Amazon-Twin-SU-EFi-Fuel-Injection_W0QQcmdZViewItemQQ_trkparmsZ72Q3a1205Q7c66Q3a2Q7c65Q3a12Q7c39Q3a1Q7c240Q3a1318Q7c301Q3a0Q7c293Q3a1Q7c294Q3a50QQ_trksidZp3286Q2ec0Q2em14QQhashZitem160309529804QQitemZ160309529804QQptZMotorsQ5fCarQ5fTruckQ5fPartsQ5fAccessories

        That might be a solution for you if you decided to go with electronics instead of a carb.

        Good luck with your project.

        Sean







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