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700 series fuel pump on a 240 200 1980

posted by  Souped_242GT on  Mon Sep 20 12:28 CST 2004
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last visit: Thu Jul 5 19:20 CST 2007
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hi, i am soon planning to drop a b21ft into my 1980 242gt. I am going to be adding an intercooler and various other performance mods. I have been reading about some of the mods i am planning and the authors have noted that when an engines hp is increase from various mods the fuel mixture can become leaned out because the stock fuel delivery system cant supply enough fuel, which in turn will cause quick damage to the engine. Would putting a 700 series(i assume higher capacity) pump solve the problem? would i have to change out the fuel pressure regulator as well? any thoughts would be much appreciated. Also I was reading about putting on a 1990+ exhaust manifold onto the b21ft, but from what i have heard u must get it machined to fit the garret turbo housing. is this neccesary? or can i fabricate an adaptor to fit the housing to the manifold? (i have access to a lathe, welding tools etc.)


Jon

VoLvO_4_LiFe








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    700 series fuel pump on a 240 200 1980

    posted by  hardknocks! on  Mon Sep 20 14:43 CST 2004
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    last visit: Sun Oct 12 06:42 CST 2014
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    hi there i installed i.p.d. in tank pump upgrade on my 85 turbo, a longer pump in size. which i believe is the same as some used on the 700 series. it is reccomended, and flows a little more fuel. depending on your planned upgrades there are other pumps you might consider (check over at turbobricks site staged modifications) i plan on some extra boost in the future (2 lbs) but first need more understanding about the subject. i read all i can about it, and dont want to waste my motor. turbo is the way to go in my opinion. good luck




    85 244 turbo intercooler.
    bilstiens HD, B&G springs, I.P.D. sways, A cam, Water cooled turbo, virgos/w yokahamas, rear spoiler, firewall braces, oil temp guage, next on list=calibrated boost guage/air fuel ratio meter.








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    700 series fuel pump on a 240 200 1980

    posted by  Volvodad on  Mon Sep 20 13:53 CST 2004
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    last visit: Thu Oct 23 16:18 CST 2014
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    The replacement Bosch main fuel pump for 1980-82 non-turbo K-jet cars is the same as for the turbos up to 85, also with K-jet, so your existing pump in good condition would be OK. It operates at considerably higher pressure than the LH-Jet pumps, which is what I believe Bob (rhaire) is referring to, but about the same capacity, if that term means volume/hr.

    Where the cars sometimes suffer from fuel pump inadequacy is when the in-tank prepump or its connecting hose begins to fail and forces the main pump to do more work. IPD offer a "heavy duty" prepump conversion for K-jet cars including turbos...may be worth a look.

    http://www.ipdusa.com/ProductsCat.aspx?CategoryID=333&NodeID=4963&RootID=629
    --
    Bob (son's 81-244GL B21F, dtr's 83-244DL B23F, 'my' 94-944 B230FD; plus grocery-getter Dodge minivan, hobbycar MGB, and numerous old motorcycles)








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      700 series fuel pump on a 240 200 1980

      posted by  Souped_242GT on  Mon Sep 20 14:43 CST 2004
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      last visit: Thu Jul 5 19:20 CST 2007
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      Hi, thank you very much for the info. I have just finished a restoration on the car (pics and such at http://www.cardomain.com/id/rollinv4l ), so i have already installed the newer prepump. I have also installed a new main fuel pump and pressure regulator, bob mentioned that the problem could be solved by dealing with the injectors instead, i have seen high output injectors for LH but not for k-jet, do u know of any? or do u think i will be ok with the stock b21FT injectors (i will be getting the injectors cleaned while doing the engine rebuild)
      thank you for your time

      Jon








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        700 series fuel pump on a 240 200 1980

        posted by  Volvodad on  Mon Sep 20 14:47 CST 2004
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        last visit: Thu Oct 23 16:18 CST 2014
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        Getting the injectors cleaned and flow tested at a specialist is a great idea. I used RC Engineering in Los Angeles for my LH units. Find them on the web, get their phone No. and see if they do K-jets. Once the injectors are up to spec, they should be able to handle turbo duty no sweat.
        --
        Bob (son's 81-244GL B21F, dtr's 83-244DL B23F, 'my' 94-944 B230FD; plus grocery-getter Dodge minivan, hobbycar MGB, and numerous old motorcycles)








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    700 series fuel pump on a 240 200 1980

    posted by  rhaire on  Mon Sep 20 13:08 CST 2004
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    last visit: Mon Aug 4 10:16 CST 2014
    [RELATED]

    The 7-series are all LH system pumps. I believe all LH system pumps are the same. Furthermore, as I recall the K-jet pump is higher capacity so I think you are going in the wrong direction. I do not think the fuel pump is limiting anyway for the turbo, rather the injectors.







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