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Can anyone identify this B20 camshaft? 120-130

posted by  red92s on  Sat Jan 29 13:51 CST 2011
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last visit: Mon Aug 18 13:02 CST 2014
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Quickly nearing the stage of my engine rebuild where I need to nail down a cam selection. The cam that came in the engine appears to be non-stock, but I've had no luck in positively identifying it. The engine has been opened up and bored +.040" previously, so perhaps the cam was changed as well during the process. There are not THAT many manufacturers of cams for these cars, so someone has got to be familiar with it.

The rear end of the cam is stamped "S758" (could be "S158" but I'm pretty sure it's a 7 not a 1).


The front of the cam (where I think Volvo marked stock cams) has nothing there.


The blank has several things cast into it, but I understand that just identifies the blank, not the grind. These all appear somewhere cast into the blank:
"K-235"
"Made in the USA"
"B 23"
"CWC"
"C1"
"D1"

So, whatizit?








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    Can anyone identify this B20 camshaft? 120-130

    posted by  planetman on  Sat Jan 29 14:27 CST 2011
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    last visit: Fri Oct 24 09:29 CST 2014
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    Hello,

    It is a "white box" "C" cam.

    --
    Eric
    Hi Performance Automotive Service (formerly OVO or Old Volvos Only)
    Torrance, CA 90502








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      Can anyone identify this B20 camshaft? 120-130

      posted by  red92s on  Sat Jan 29 17:09 CST 2011
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      last visit: Mon Aug 18 13:02 CST 2014
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      Thanks Eric. That was significantly easier than I thought.

      "Whitebox" = "Generic over-the-counter" parts?







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        Can anyone identify this B20 camshaft? 120-130

        posted by  planetman on  Sat Jan 29 17:48 CST 2011
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        last visit: Fri Oct 24 09:29 CST 2014
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        Hello,

        My definition of a "Whitebox" part refers to the lack of a known manufacturer.

        It is rare, but sometimes a part received in a "Whitebox" turns out to be a quality part.

        You can or sometimes could get decently made aftermarket parts.

        For example, before Federal-Mogul bought TRW automotive, we could get high quality valve train parts like camshafts, lifters, valves and valve springs.

        But Federal-Mogul shut down the TRW valve train division because they had "Sealed Power", which also makes valve train parts, BUT NOT FOR OLD VOLVOS!!!!

        In case you can't tell, I have been pissed off at Federal-Mogul ever since.

        When I found out I was no longer going to easily get these parts, I cleared the shelves from my suppliers, but all I have left are valve springs.

        --
        Eric
        Hi Performance Automotive Service (formerly OVO or Old Volvos Only)
        Torrance, CA 90502








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          Can anyone identify this B20 camshaft? 120-130

          posted by  red92s on  Sat Jan 29 18:10 CST 2011
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          last visit: Mon Aug 18 13:02 CST 2014
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          Eric, Is there anyone making a decent "D" camshafts these days? I know IPD and a few others offer them for sale, but don't state a manufacturer.

          The D cam is the direction I am leaning. It's an around-town kind of car and will never see a track. My girlfriend and I take it to dinner, and to breakfast on sunday mornings, and an occasional spirited drive up to the lake . . . thats about it. Heck just going from the auto to a manual it'll probably feel like a totally different car.

          The rest of the engine is a +.040" B20 with an M41. The head is at the shop now for hardened seats, new guides, new exhaust valves (thanks Eric), back-cutting the exhaust valves, and a 3-angle valve job. Exhaust ports will get a bit of work right behind the seats. Plan to do a bit of head/block skimming to get the compression back up, but need to take some measurements first.

          Air coming in through rebuilt SU's on an aluminum manifold, and out through a dual-outlet stock manifold and 2" exhaust. Might fool around with running EDIS once everything is broken in, for no better reason than an educational project.








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            Can anyone identify this B20 camshaft? 120-130

            posted by  planetman on  Sat Jan 29 20:09 CST 2011
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            last visit: Fri Oct 24 09:29 CST 2014
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            Hello,

            We have a well known camshaft manufacturer make copies of the D cam.

            I normally have them in stock, but am awaiting the latest order which is due next week.

            As long as you don't go wild with the compression, the D cam works well with the SU carbs.

            We prefer to use DX needles when using HS6 SUs on a B20.

            When properly tuned with DX needles, your car will accelerate with lots of power and should get around 25 mpg on the highway with the overdrive after the engine is broken in.

            The only draw back with the DX needles is a rough idle when properly adjusted.

            But since you spend most of the time with your foot on the pedal, a rough idle is a small inconvenience.


            --
            Eric
            Hi Performance Automotive Service (formerly OVO or Old Volvos Only)
            Torrance, CA 90502








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              Can anyone identify this B20 camshaft? 120-130

              posted by  red92s on  Sat Jan 29 20:46 CST 2011
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              last visit: Mon Aug 18 13:02 CST 2014
              [RELATED]

              I'm weeks away from needing to have a cam in hand, just need to decide on one.

              I've run some rough numbers and it looks like low-mid 9's is what I'd end up at. Unless I'm overlooking something obvious, getting any higher than that probably requires more machine work than I can afford, shorter pushrods, etc.







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