Merc V6 History

[Old boy]

I personally feel the Moderators should have "locked" all other members out of this thread from the very beginning.
Perhaps the two original people may have kept writing this wonderful piece of history.
I pray they do continue.

Cheers.

[olboatman]

They might not want to be heathens.
But getting real these guys have provided some amazing info and I would love to see it keep coming!!!

Dave

Well said! Gary

[transomstand]

They might not want to be heathens.

I can't even comprehend that

[Dave Strong]

I,m hoping it as was said above and just holiday season and the great info continues.

Dave

[Mark75H]

I'm sorry I asked a question, but that is how I learn things ... I ask someone who knows more than I do.

If the moderators feel it would be useful, feelings will not be hurt if my questions are deleted from this forum.

[HStream1]

I don't think anyone doesn't want to ask questions. I have a ton. But in a case like this being so rare!!! And we may never have the chance to hear it again. One must allow the Insiders of the history of the all famous V6 to be revealed. Then Bombard them with questions. Just My 02.

It's not so much about the moderators as it is all of us allowing the guys to tell their story without interuption. I myself am at fault and and I appoligize. I would love to see this rare piece of history get restored for all to appreciate.

I remain silent from this point on.

[Onetime]

Let's just move on and hope Jerry posts more.

[tired creek marine]

I look forward to hearing more about the v6, right up to the efi, and opti-max. Sence 98 the blocks have not changed much, yet the intake and operation is great.

Well I will be silent, and look forward to more wisdom from two great minds.
Thank You for your excellence.

[rckid74]

Sorry guys, I’ve had to attend to some personal matters for awhile here and haven’t been able to continue with “Black Max”. I hope to get back to it soon.

[Murph]

Appreciate all the effort.

[transomstand]

Sorry guys, I’ve had to attend to some personal matters for awhile here and haven’t been able to continue with “Black Max”. I hope to get back to it soon.

Hope all is well, let us know if we can help in any way.

[Speedfab]

Sorry guys, I’ve had to attend to some personal matters for awhile here and haven’t been able to continue with “Black Max”. I hope to get back to it soon.

Yes PLEASE do. There are many of us out here who appreciate this immensely and enjoy it very much. I too am an ME and have spent my life in the performance engine business... I could think of a million questions to ask you, but I intentionally did not want to write anything here that might crap up this thread. Please continue, there are many more like me out here who are quietly watching this thread anxiously awaiting the next piece of the story.

Thank you very much for taking your time to do this.

[olboatman]

Yes PLEASE do. There are many of us out here who appreciate this immensely and enjoy it very much. I too am an ME and have spent my life in the performance engine business... I could think of a million questions to ask you, but I intentionally did not want to write anything here that might crap up this thread. Please continue, there are many more like me out here who are quietly watching this thread anxiously awaiting the next piece of the story.

Thank you very much for taking your time to do this.

Well said! Thank You rckid74. Hope all is well. Gary

[milkdud]

Great thred. Hope it can get back on the air.
C

[rckid74]

OK --- Let’s get on with designing “Black Max”. That name, BTW, I believe was dreamed up by someone from marketing (I don’t know who) late in the program. I remember Bob Johnson called me into his office one day and wanted to know what I thought of it. I said I thought it was kind of “hokey sounding”. He just laughed. It’s grown on me since and I like it now. I wonder why they never picked out a similar name for the 3 liter?


Having determined the basic parameters, 60 degree V6, with a bore of 3 1/8 in., stroke of 2.650 in., and cyl. center distance of 4 3/8 in., the other big decision was just how to form the transfer passages I had designed into a die - cast block. It was not possible to form them using the usual metal slides because half of them are buried deep in the middle of the casting. OMC had been successfully casting them in their 3 cylinder looper for several years using cast iron blister liners as inserts in the die and that looked like the only way to do it at that time. Salt cores were very experimental then and “lost foam” was still a long way off. Blister liners form the transfer passages and exhaust port as part of the cast iron liner. The exhaust port is machined open by a milling cutter after casting. The blisters have to be made heavy enough to withstand the very high (5000 psi) casting pressure. You might say why not just use sand cores like is done with most of the automotive blocks today. Sand cores would not stand up to the high velocity metal being rammed into the die, and any sand residue left in the die would rapidly wear out the metal slides which must fit closely together. As far as I know, sand cores are only used in gravity fed or low pressure filled molds.


I was concerned that we might have an infringement problem if we used blister liners so I called in our patent attorney and explained my concern to him. He assured me there would be no problem. I assumed by that that if any patents existed by OMC or others, they had expired. So, blister liners it was.