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gigem75 View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote gigem75 Quote  Post ReplyReply Direct Link To This Post Posted: May-13-2008 at 7:01pm
just got the news from the machine shop, one cracked head and will need to go 30 over. He's done several marine apps and says he can get the main seals. Ordered them today from skidim but the rear main is on backorder but they seemed pretty sure it would be to them in a couple of days.
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Quigs85SN2001 View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Quigs85SN2001 Quote  Post ReplyReply Direct Link To This Post Posted: May-14-2008 at 8:33pm
Brian,
I finally got word from the machinist this morning that .030 over will work. I'd like to buy your pistons, if they're still available. Let me know how you would like to proceed. My home email is margaret48350@comcast.net


Brian

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Post Options Post Options   Thanks (0) Thanks(0)   Quote gigem75 Quote  Post ReplyReply Direct Link To This Post Posted: May-16-2008 at 12:43pm
my machine shop person/tech/mechanic/machinist/guru told me .030 was the min that a 351 would be bored. That sound right?
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Post Options Post Options   Thanks (0) Thanks(0)   Quote JoeinNY Quote  Post ReplyReply Direct Link To This Post Posted: May-16-2008 at 1:22pm
No, .020 over pistions are available and 351w blocks are bored .020 over all the time. He may mean that your block needs to go .030 to get past some cylinder issues, he maybe pushing parts he has on the shelf, or he might just be a dumbass...
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Post Options Post Options   Thanks (0) Thanks(0)   Quote nuttyskier2002 Quote  Post ReplyReply Direct Link To This Post Posted: May-17-2008 at 5:43am
Originally posted by Quigs85SN2001 Quigs85SN2001 wrote:

Brian,
I finally got word from the machinist this morning that .030 over will work. I'd like to buy your pistons, if they're still available. Let me know how you would like to proceed. My home email is margaret48350@comcast.net




Brian, I sent you an e-mail to your comcast address. I still have the pistons.

Brian
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Post Options Post Options   Thanks (0) Thanks(0)   Quote nuttyskier2002 Quote  Post ReplyReply Direct Link To This Post Posted: May-17-2008 at 6:06am
Originally posted by gigem75 gigem75 wrote:

my machine shop person/tech/mechanic/machinist/guru told me .030 was the min that a 351 would be bored. That sound right?


Gig, I agree with Joe. Sometimes the block just won't clean up to .020. Remember that is the total overbore. The cutter on the boring bar is actually only cutting into the cylinder .010" to get that (even less....you have to save some metal to hone). So for a block to be able to clean to .020 the ridge (where the piston ring tops out) can only be a maximum of about .007 to .008". I've seen blocks with well over 100K miles and only have a .002" ridge. Then I've blocks with less than 90K and have over .010". Just depends on how well is was maintained and how much it was abused.
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Former boats:
88 Ski Centurion Tru Trac II
59 Chris Craft Capri (woody)
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Quigs85SN2001 View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Quigs85SN2001 Quote  Post ReplyReply Direct Link To This Post Posted: May-27-2008 at 8:04pm
Brian A,

I took those pistons to the machinist this morning. He thought the one piston should clean up alright. Thanks for your help!
Brian

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nuttyskier2002 View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote nuttyskier2002 Quote  Post ReplyReply Direct Link To This Post Posted: May-28-2008 at 3:08pm
Brian Q.

Very good! Glad that someone could use them. What cam are you going to be using? Just curious.
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88 Ski Centurion Tru Trac II
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Quigs85SN2001 Quote  Post ReplyReply Direct Link To This Post Posted: May-28-2008 at 5:22pm
Brian A,

I haven't gotten that far yet, any suggestions? The machine shop said to put the old one back in, it looks fine. If I'm going to all this trouble, I think I want something a little hotter than the stock cam.
Brian

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Post Options Post Options   Thanks (0) Thanks(0)   Quote TRBenj Quote  Post ReplyReply Direct Link To This Post Posted: May-28-2008 at 5:54pm
Originally posted by Quigs85SN2001 Quigs85SN2001 wrote:

Brian A,

I haven't gotten that far yet, any suggestions? The machine shop said to put the old one back in, it looks fine. If I'm going to all this trouble, I think I want something a little hotter than the stock cam.

Call Cam Research- all they do is Fords, and they know ski boats. Be sure to tell them that you have a reverse rotation engine. Also have your head, intake, CR info, etc handy, as theyll want that to make a good recommendation.

http://camresearchcorp.com/
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Post Options Post Options   Thanks (0) Thanks(0)   Quote gigem75 Quote  Post ReplyReply Direct Link To This Post Posted: May-29-2008 at 9:28pm
Great information, thanks!
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Quigs85SN2001 Quote  Post ReplyReply Direct Link To This Post Posted: May-31-2008 at 11:23am
Call Cam Research- all they do is Fords, and they know ski boats. Be sure to tell them that you have a reverse rotation engine. Also have your head, intake, CR info, etc handy, as theyll want that to make a good recommendation.


Thanks for the information! I found a local guy who can grind me a RR cam, but Cam Research is about $100 cheaper. It looks like a few guys on CCFan have used Cam Research. So, between a better price, and a good track record, I think I'll go with Cam Research. I know a few guys have expressed interest in reverse rotation roller cams. The local guy I found can grind them, but they'll set you back about $700! Just thought I'd mention it in case anyone is still looking for one.
Brian

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Post Options Post Options   Thanks (0) Thanks(0)   Quote eric lavine Quote  Post ReplyReply Direct Link To This Post Posted: May-31-2008 at 11:48am
probably keeps them really busy, Tr that was for you
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Post Options Post Options   Thanks (0) Thanks(0)   Quote eric lavine Quote  Post ReplyReply Direct Link To This Post Posted: May-31-2008 at 11:49am
Did anyone ever check out Deltacams.com?
just curious
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Post Options Post Options   Thanks (0) Thanks(0)   Quote nuttyskier2002 Quote  Post ReplyReply Direct Link To This Post Posted: May-31-2008 at 4:08pm
Brian, please post on here what grind numbers Cam Research recommends. You are using GT40P heads right? Are you having the block decked any? If using a .038 to .040" head gasket you'll want your pistons to be "in the hole" @ .005". That will give you an almost perfect quench distance of .045".
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88 Ski Centurion Tru Trac II
59 Chris Craft Capri (woody)
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