Zl-1 Prototype Block - NCRS Discussion Boards

Zl-1 Prototype Block

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  • Clem Z.
    Expired
    • January 1, 2006
    • 9427

    #16
    Re: Zl-1 Prototype Block

    Originally posted by Dick Whittington (8804)
    Here are Ronald's pictures of the engine. From of the looks of the rest of his photos, he hit the mother lode
    if the oil pump is under the cam cover like the new LS engines i have a engineering report around here some place

    Comment

    • Joe L.
      Beyond Control Poster
      • February 1, 1988
      • 43219

      #17
      Re: Zl-1 Prototype Block

      Originally posted by Dick Whittington (8804)
      Here are Ronald's pictures of the engine. From of the looks of the rest of his photos, he hit the mother lode
      Dick and Ronnie-----


      It's not a ZL-1 block, although it it shares some features of a ZL-1 block. It may have been some sort of "prototype" of an aluminum big block. The casting numbers look like that sort of thing. Keep in mind, also, that at that point in time and, even, to the present day, just about any aluminum big block is often referred to in the vernacular as a "ZL-1". I don't think that the Jim Hall Can Am big block engines were, at all, a "ZL-1", but they are often referred to as such.

      One other thing I note on this engine. Many of the bolts as those seen on the timing cover, etc. are Premier Nut and Fastener Company's "Supertanium" product line. Once-upon-a-time, before ARP and others came into being, these were popular in some racing circles. I think they were even used on Indianapolis cars of days gone by. However, as far as I know, they were never used by GM.
      In Appreciation of John Hinckley

      Comment

      • John D.
        Expired
        • November 11, 2008
        • 14

        #18
        Re: Zl-1 Prototype Block

        Gary, Can you pls provide your e-mail address, so I send you photos of MY block so you can post them? I found you have to be a mathmematician in order to use the 'resize tool'. Unless you'd rather just provide me with bullletized directions on how to use the resize tool. Thanks for the link though.

        Comment

        • Gary C.
          Administrator
          • October 1, 1982
          • 17658

          #19
          Re: Zl-1 Prototype Block

          John, once you install the Microsoft Power Tool Image Resize tool all you have to do is open Explore by right clicking the start button. Then go to the director where your photos are that you want to resize. Highlight the photo(s) you want to resize, then right click your mouse button and select "resize pictures" and chose the "small" setting. The Image Resize tool will save a copy of your photo(s) with (small) file name. Give it a go, it's easy to do. Gary....
          NCRS Texas Chapter
          https://www.ncrstexas.org/

          https://www.facebook.com/profile.php?id=61565408483631

          Comment

          • John D.
            Expired
            • November 11, 2008
            • 14

            #20
            Re: Zl-1 Prototype Block

            Pictures Of My 0-294550 Block Attached!
            Attached Files

            Comment

            • John D.
              Expired
              • November 11, 2008
              • 14

              #21
              Re: Zl-1 Prototype Block

              MORE PHOTOS...Can Am...ZL-1...any ideas?
              Attached Files

              Comment

              • Art A.
                Expired
                • June 30, 1984
                • 834

                #22
                Re: Zl-1 Prototype Block

                John, I think you have a Chevrolet Engineering prototype block..............that's what the O- number means and I'm very sure that the other number, 70065-53-W, is an Engineering Work Order number.

                Comment

                • Art A.
                  Expired
                  • June 30, 1984
                  • 834

                  #23
                  Re: Zl-1 Prototype Block

                  Originally posted by John Davis (49690)
                  MORE PHOTOS...Can Am...ZL-1...any ideas?
                  John, I did not see your photo's when I posted my first response, but after looking at the numbers in the photo's, I'm SURE that what I posted is correct.

                  The Engineering WO would tell us exactly what you have.....................IF WE COULD ONLY GET THE WO's OUT OF GM.

                  Comment

                  • John D.
                    Expired
                    • November 11, 2008
                    • 14

                    #24
                    Re: Zl-1 Prototype Block

                    Thanks...Is there ANY way to find out what the Work Order was for...what the block was originally used for...put in? Thanks.

                    Comment

                    • Art A.
                      Expired
                      • June 30, 1984
                      • 834

                      #25
                      Re: Zl-1 Prototype Block

                      John,


                      ...Is there ANY way to find out what the Work Order was for...

                      Yes, but you will have to wait until I return to Michigan which won't be until next April. We can only pray that GM will still be in business then......for more reasons than this!

                      ......what the block was originally used for

                      Yes, the WO will tell us what program the engine was slated for.


                      ...put in?

                      The WO will Probably NOT specify an exact vehicle's Vin, but it may give us information as to what type of vehicle it was going into, Corvette, Chevelle, Camaro, truck, or being sent to a specific source.



                      Didn't you contact me directly about this engine awhile back?

                      AA

                      There is ABSOLUTELY NO better time than this.......... to go out and buy a GM product!!!!!!

                      Comment

                      • Clem Z.
                        Expired
                        • January 1, 2006
                        • 9427

                        #26
                        Re: Zl-1 Prototype Block

                        no one answered my question,"is the oil pump on the front of the crankshaft under the timing gear cover" ?

                        Comment

                        • Dick W.
                          Former NCRS Director Region IV
                          • June 30, 1985
                          • 10483

                          #27
                          Re: Zl-1 Prototype Block

                          Joe, I don't have my old Chevrolet Power Book handy right now, but I am thinking that the 4.40 bore block was available in the 1969 and/or the 1970's
                          Dick Whittington

                          Comment

                          • Ken A.
                            Very Frequent User
                            • July 31, 1986
                            • 929

                            #28
                            Re: Zl-1 Prototype Block

                            Originally posted by Dick Whittington (8804)
                            Joe, I don't have my old Chevrolet Power Book handy right now, but I am thinking that the 4.40 bore block was available in the 1969 and/or the 1970's
                            According to the Chevy Power Book:
                            4.25 complete engine available from 69-74 built a 427-454
                            4.44 bare block w/ liners only available from 69-74 built a 465-495
                            4.44 390 alloy no liners bare block available from 72 -78 built a 430 up to 510

                            Comment

                            • John D.
                              Expired
                              • November 11, 2008
                              • 14

                              #29
                              Re: Zl-1 Prototype Block

                              Art,
                              Thanks for all your input. I don't THINK I talked to you about my block...but I've spoken to a LOT of people trying to determine it's origin. Someone told me that 70065 was a Vince Piggins Work Order number...in the Special Performance Division (or something similar). I'll have to pay Wayne Guinn the money owed for his research before I can see documentation as to why he thinks it may have been in a '66 L-88 test mule for a while....or his stating that it MAY have been in one of the 2 ZL-1 Camaro show cars. I'll anxiously await April to possibly find out the Work Order information. I'm putting it in a 65 Vette Coupe. By the way, aside from the block (.040 over), here are some parts I have for the build:

                              3946074 heads
                              Holley 4296 Carb
                              7115 Crank
                              NOS ZL-1 Rods
                              NOS ZL-1 Push Rods
                              393198 Intake Manifold
                              NOS R43XL Plugs
                              NOS ZL-1 Dampner
                              NOS ZL-1 Waterpump
                              3858403 Bellhousing
                              M-22 Rock Crusher Tranny

                              I have a list of parts I need, if anyone is interested in selling something.
                              ZL1Johnny@yahoo.com

                              Comment

                              • John D.
                                Expired
                                • November 11, 2008
                                • 14

                                #30
                                Re: Zl-1 Prototype Block

                                Typo on the intake number: Should be 3933198 (WITH a plenum (divider) from the factory....one that got past the inspectors?) Which is nice, as it'll make it more "Streetable".

                                Comment

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