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After 25 yrs its out! |
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tsanchez
AMC Addicted Joined: Jul/09/2007 Location: Arizona Status: Offline Points: 4302 |
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I would run it with the grooves before using mine with craters but like I said it is already at .035 I think.
I am now suprised it still ran mid 11s like it was Edited by tsanchez - Apr/08/2012 at 9:31am |
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amx39068
Supporter of TheAMCForum Joined: Feb/21/2008 Location: Arizona Status: Offline Points: 11576 |
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I had a machine shop "knurl" a set of .025 pistons to get them from .025 to .030 without telling me beforehand after they mistakenly bored the block to .030 never thinking the pistons would be only .025. Well when I fired the engine up it smoked like a mosquito fogger so I made them start all over and ordered .030 pistons and WASTED a perfectly good set of .025 forged pistons in the process.
So Tony why don't you just knurl them babies to .035 It'll work. Yeah, that's the ticket!
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Dan Curtis-Owner and CEO AZ AMC Restorations; Facebook: https://www.facebook.com/amcmusclecars/ & Curtis Real Estate Development
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SKeown
AMC Addicted Joined: Jul/30/2009 Location: Texas Status: Offline Points: 3085 |
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Here's a possible scenario: Hone the +.035 to .040 and get a set of Wiseco's flat tops, they are off the shelf and come with pins and rings. Then hard block the pitted block and bore it until it's good for use in the new motor. Yoy can sell the .030 pistons on eBay for half the price of the wiseco's. If you have the .035 block honed on a Sunnen machine with a deck plate it will come out straight and round.
SKeown
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tsanchez
AMC Addicted Joined: Jul/09/2007 Location: Arizona Status: Offline Points: 4302 |
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If I am going to buy pistons and bore a block they will be the ones I need to build the big engine, not going to spend money for two engines. Gotta think about it
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SKeown
AMC Addicted Joined: Jul/30/2009 Location: Texas Status: Offline Points: 3085 |
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While you're thinking consider this. you're going to hone the one block and get pistons for it anyway. The Wiseco flat tops are $587 from Summit #PT117H45 @ 4.210 bore yielding 410 cubes and include rings. You can sell you're current pistons for $300 and were going to buy rings anyway. Based on that, you'll only be out around $300 more including the boring than just re-ringing. BTW, King bearings are availiable now.
PS, Campbell Enterprises list that part number for $553 and they have coated skirts too. Wiseco's coating held up good for me. It may be at .045 over the pitted block can be used unless the pitting is extreem. http://www.wiseco.com/Catalogs/Automotive/CompleteCatalog.pdf About 35% down the page.
SKeown
Edited by SKeown - Apr/08/2012 at 12:43pm |
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tsanchez
AMC Addicted Joined: Jul/09/2007 Location: Arizona Status: Offline Points: 4302 |
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Yeah that would work but my goal was to drive this car as it was when I first built it, not rebuilt using new stuff. If I change blocks Im not sure the cam will survive as the lifter bores may not be in exactly the same spot. Dilemnas
Steve just sen me your engine for the trip Ill use my heads
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SKeown
AMC Addicted Joined: Jul/30/2009 Location: Texas Status: Offline Points: 3085 |
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Dilemas is what this hobby is all about, and for many it's the enticement. If you don't feel an additional .015 overbore would correct the bores, you could just clean it all up and reassemble as is for the cruise. My engine still had no blowby even with the rings molly coating missing.
SKeown |
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tsanchez
AMC Addicted Joined: Jul/09/2007 Location: Arizona Status: Offline Points: 4302 |
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As bad as it looks, it still ran perfect, but.....
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tsanchez
AMC Addicted Joined: Jul/09/2007 Location: Arizona Status: Offline Points: 4302 |
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Its up for grabs, tried a three stone hone for a bit,, cleaned up a bunch. May get by with just a .001 -2 hone and have a ..007 bore/piston clearance. will st ill have the ocasional divot but at least I can set the end gap at .020 and roll with it
OR build the new mill at 434-443ci what say you
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AmcKidd
AMC Addicted Charter Member Joined: Jun/29/2007 Location: Oroville, Ca Status: Offline Points: 809 |
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for ME it would depend on IF i was gonna build the Bigger Mill anyway- if it was in the plan to do the bigger engine, this just moves that plan forward at a sooner date- if it was ME, i would hone it and run it-Ex- brother in law was broke and needed something to make it move-(this was before i got it back) the 360 in my Gremlin was totally rusted to the point it wouldnt move (Jeep sat in a creek bed 2 years with no hood) after a lot of brake fluid/trans fluid/ etc it was freed up- then a new set of STD rings in the VERY pitted cyls made it moveable - it has been in the car for at least 10 years this way- last trip to sacramento raceway almost killed it- burned almost as much oil as fuel- ET's were wayy off- normally a N/A 12:80 car, it was stuck in the bottom 13's
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Oroville, Ca
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