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History duntov 30/30 question

Discussion in 'The Hokey Ass Message Board' started by Mac30, Jun 12, 2012.

  1. Mac30
    Joined: Oct 8, 2008
    Posts: 276

    1. S.F.C.C.

    Done a search on here and web with no luck. I was wondering year they were made available to the public? My dad said he remember selling them in 70 at the dealership but I know they been around longer than that.

  2. Fogger
    Joined: Aug 18, 2007
    Posts: 1,636


    I bought one from Bruder Chevrolet in 1964
    Last edited: Jun 22, 2012
  3. Tommy454
    Joined: Sep 6, 2010
    Posts: 85


    Crane makes the 30-30 blueprint cam
    CompCams N+30-30H grind number 12-672-4
  4. 1971BB427
    Joined: Mar 6, 2010
    Posts: 7,272

    from Oregon

    I'm pretty sure they were available at the parts counter of the Chevy dealers the same year they came out in a car as an optional cam/engine. 1957 And they were available long after they stopped putting them in SBC engines. Bought my last one in 1972, but probably had them even later than that.

  5. dirty old man
    Joined: Feb 2, 2008
    Posts: 8,912

    dirty old man
    Member Emeritus

    The '57 thru '63 had an early version just called a "Duntov" till the 30-30 came out in '64. Then it became the "12 & 18 Duntov" and the "30-30 Duntov", distinguished and designated by valve lash settings.
  6. OoltewahSpeedShop
    Joined: Oct 18, 2007
    Posts: 3,103


    My Dad said the 30/30 was available at Honest Charley's in '63 before he went in the Army. It was the new HOT cam for the 283.

    The 30/30 was also known as the Pink Lable Duntov. 30/30 was the valve lash intake and exhaust, since it was a solid lift camshaft.

    I'd love to have a new one in the box. Just Sayin'...
    Last edited: Jun 12, 2012
  7. wastedchilhood
    Joined: Feb 5, 2012
    Posts: 21


    A friend of mind bought one in 1956,paid $18.00 for it.
  8. Larry T
    Joined: Nov 24, 2004
    Posts: 7,734

    Larry T

    I thought the Duntov 30/30 was the factory camshaft for the 365/375 HP 327 and the 302 Z-28. It's different than the earlier 283 solid lifter cams (also Duntovs). That would have made it available in the early 60's. You can still get a cam with the same specs from most cam grinders.

    I think that if I was gonna go for a "factory" camshaft that is really too radical for practical use, I'd jump straight to the 140 camshaft. It makes the 346 sound like a weak sister.
    Larry T
  9. 55chevr
    Joined: Jul 12, 2008
    Posts: 956


    You are confusing 2 Chevrolet factory camshafts ... both were readily available of the the counter from Chevy dealers;
    the 30/30 refers to the valve clearance which was .030 intake .030 exhaust on corvette factory 327/365 HP and 375 HP engines 1965 first year introduced.

    The Duntov cam was known as 097 cam and was from 1957 and up Corvette 283 270 HP and 283 HP engines. The clearance was .012 intake and .018 exhaust. The 30/30 is a more radical profile
  10. 47ragtop
    Joined: Feb 8, 2007
    Posts: 664


    The 57 thru 61 Duntov cam was called an 097 . That was the last 3 digits of the part number. The casting number ended in 098. As stated above the valve lash was set on .012 and .018 for the intakes and exhaust respectfully. I remember this cam as only availble in 283's. The 30-30 cam came in 327's.
  11. lippy
    Joined: Sep 27, 2006
    Posts: 6,118

    from Ks

    I remember buying off road Z-28 cams I remember the biggest one was a third design. Lots of years ago fella's. LOL. Sorry didn't have a damn thing to do with the 30/30. Lippy
  12. Pete1
    Joined: Aug 23, 2004
    Posts: 2,074

    from Wa.

    The 30-30 is still a good cam for a mild hot rod.
    We turned 152 at Bonneville last August with one in a basically stock
    350 Corvette engine.
    It is one of my best selling grinds.
  13. 29AVEE8
    Joined: Jun 28, 2008
    Posts: 1,384


    Nothing, that is to say, Nothing, sounds better in a 327 than a 30/30. Just my dot o2.
  14. Yes, two completely different camshafts for the early solid-lifter Chevrolet engines. The "Duntov" was used from 1957 to 1961 high horsepower 283 c.i. engines as well as 1962 to 1964 high horsepower 327 c.i. engines. As 55chevr states, the "30/30" was introduced in 1965 and was used (I believe) until 1969.

  15. I have a Chet Herbert rendition sitting on the shelf still in the box, next SBC I do, it goes in. They were good cams for a stock car claimer class I was in.

  16. 55chevr
    Joined: Jul 12, 2008
    Posts: 956


    If my memory serves me correctly, the cost of an 097 cam (Duntov) was $30 at Chevy. I would really wake up a stock 283 chevy engine. The mentioned 3rd design cam was LT1 "Off the road racing" sold over the counter at Chevy.
  17. Dave Downs
    Joined: Oct 25, 2005
    Posts: 912

    Dave Downs
    from S.E. Penna

    All correct except for the year of the 30/30 - first use was in 1964 Corvette 327/265hp (carb) and 375hp (FI) - and cams were available at Chevy dealers into the mid 1970's
  18. bowie
    Joined: Jul 27, 2011
    Posts: 2,874


    Like Dave Downs says (except for 327/265 typo) : The 327/365 came out in 1964,with 1st 202 intake valves and the 2818 holly carb; as replacement to 327/340 from 1963 with 1.94 intake valves and a Carter AFB carb. My `64 coupe still has one in its RE code 870 block,its a nice winding cam.
  19. tommy
    Joined: Mar 3, 2001
    Posts: 14,757

    Member Emeritus

    My memory tells me that the 097 cam was for earlier 283 engines. We called the 30-30 cam a 365 cam. I remember it as the cam for the 365 HP 327 and the F.I. 327. My 63 Corvette had the 340 HP engine and used a different cam. I forget the lash (it was damn near 50 years ago.) but it was not 30-30. I'm pretty sure that the 30-30 cam as we think about it was new in 64 when the FI engine was top of the line in HP. There were other solid lifter cams available over the parts dept counter like my 63 340 HP engine but the 097 was the king until the 365 HP cam was available from the parts dept. I believe that the 097 cam was the cam in the FI 283s and the 30-30 cam was the one in the FI 327s I'm sure there are better cams today but nothing says high winding Chevrolet HP of the early days like an 097 and the 365 cam.
  20. It's been way too many years ago, but I thought the 097 cam was in 2x4 265's in '56 and the 270/283 horse 283 had a 098 Duntov.
  21. If my memory is right, wasn't there a Duntov pink and a Duntov green cam available. I am sure I had a pink in my 327 monaro [australian make believe camaro] back in the early 70's.
  22. I GOOFED! As Dave Downs stated, the "30/30 cam started use in 1964 NOT 1965 as I claimed. Boy, I hate when that happens. I will mention again though, that the "Duntov" and "30/30" are different cams.

    Thanks Dave!

  23. Hey I thought I was the only one that could say off the wall things.

    Prior to the Duntov 30/30 camshaft there was the 097 and 098 cam shafts from the mid fifties though 1965 when the 30/30 became available. But there was also in the '50s a special service camshaft designed for road racing corvettes. I don't recall the number for it.

    That should really muddy up the waters for ya. All were available across the counter from Chevrolet.

    Now just to be a little more off the wall than Lippy; I have at my disposal an M/T 30/30 cam shaft, I have been trying to find specs on it for years. I guess I'll just have to poke it in a block and measure and degree it to find out.
    Last edited: Jun 13, 2012
  24. Carnuba
    Joined: Mar 19, 2012
    Posts: 430


    the 140 sounds amazing. First one I ever used, around 1976, I was smiling like a little girl the 1st time I fired it up.
  25. Mr48chev
    Joined: Dec 28, 2007
    Posts: 30,866


    Right at that. I lost track of how many of those things I ended up helping the local guys install over a five year period before I got drafted. Usually when they got the engine torn apart and couldn't figure out how to get it back together. I think the cam and lifters was under 50 bucks at the local dealer. They bent valves real well in 56 265 two barrel engines too if you didn't swap pistons for a set that had the eyebrows for valve clearance.
  26. Dave Downs
    Joined: Oct 25, 2005
    Posts: 912

    Dave Downs
    from S.E. Penna

    Yeah - and I can't type for sh^t!!!!!! (as was pointed out:p:D:D) - - the dreaded 265 HP 327!!!!
    Last edited: Jun 13, 2012
  27. fiveohnick2932
    Joined: Mar 29, 2006
    Posts: 891

    from Napa, Ca.

  28. I found this information provided on the National Corvette Restorer's Society's website which may help clarify some of numbers used when talking about Chev's early solid lifter camshafts:

    According to the National Corvette Restorer's Society, the Duntov camshaft and the 30/30 are different cams altogether. They also point out that "097" and "098" numbers frequently used refer to the same "Duntov" cam, but that 097 refers to factory drawing 3736097 showing the front of the cam and the pin, whereas drawing 3736098 shows the detailed lobe data. The "part number" 3736097 is for the camshaft assembly including the indexing pin - whereas 3736098 refers to the number stamped on the camshaft itself.

    More food for thought...: )

  29. fiveohnick2932
    Joined: Mar 29, 2006
    Posts: 891

    from Napa, Ca.

    Called the GM 140 off road cam. Nasty sounding......
  30. k9racer
    Joined: Jan 20, 2003
    Posts: 3,091


    o97/098 Milling pn C8P The 30 /30 was Milling P/N C10P used J 992 and later JX 992 lifters. The 097 had a grove in the rear of the cam as 55 did not have a grove bearing on the rear cam bearing from the factory.. The other cam mentioned was the off road 7140 and 7141 cams milling no c700P and c750P .. As per my millings rep all the special order cams for GM were mfg by Millings and packaged in GM boxes for Distribution. I had a deal?sponsorship with Millings for quite a few years. Lost it and started using Reed and Schenider cams in my Hot Rods and Race cars. Boy was that a long/long time ago.

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