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By 46yblock - 14 Years Ago
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I just received a call from Egge about my order for .060 OS 312 pistons. They didnt have any on hand and were going to have to grind a set. Also didnt have any new castings to use and had to use older castings, therefore being unable to assure weights closer than 16 grams from one piston to the next. I cancelled the order. I'll be calling John soon.
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By aussiebill - 14 Years Ago
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46yblock (3/11/2011)
I just received a call from Egge about my order for .060 OS 312 pistons. They didnt have any on hand and were going to have to grind a set. Also didnt have any new castings to use and had to use older castings, therefore being unable to assure weights closer than 16 grams from one piston to the next. I cancelled the order. I'll be calling John soon. Mike, you dont use Silvo-lite pistons? they make .060 in 312. # 1066 + 060. regards bill.
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By mctim64 - 14 Years Ago
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3 sets left, better hurry!  http://cgi.ebay.com/ebaymotors/1956-60-Ford-V8-312ci-5-1L-Pistons-/230347413307?pt=Motors_Car_Truck_Parts_Accessories&hash=item35a1c6973b
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By 46yblock - 14 Years Ago
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Tim, I have communicated with the seller twice over the last 3 or so weeks. Once by email and another by phone. Each time he has said the pistons are gone, sold out. I placed another email inquiry this AM. I'm not on a blocked buyer list, as the purchase can be processed up to hitting the "Confirm Purchase" tab. Havent ever delt with the seller, and have never left negative feedback, for anyone, even though a few times it has been warranted. Strange. Bill, as for Silvolites, I was trying with the Egge's to gain a little advantage regarding the Piston pin location. A call into John earlier yielded the info that they are out of 3.860 forged pistons. Still awaiting a return call regarding the expected time of restock. Silvolite may eventually be the only choice.
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By HT32BSX115 - 14 Years Ago
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Yeah! That looks like a fairly good deal at $240 + $18 shipping....... Although you will need to ask if they're +0.60 .....it didn't say............ (you must have +0.60?)
Summit has the same kits for $309 + shipping.......
Maybe contact El Paso Discount Auto Parts, ask them if they'll sell direct, then call Summit and then ask them if they'll match etc.......
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By easyissy - 14 Years Ago
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It does mention .060 over. See below "Silvolite" Pistons for all 1956-60 Ford V8, 312ci, 5.1L engines "Silvolite" USA, Pistons are engineered for the special needs of the replacement market, they are made using gravity feed permanent mold casting, made from the appropiate aluminum alloys including Copper, Magnesium, Nickel and Silicon for increased strengh to meet the demands of todays engines. We have sets only in .060 over the standard bore which is 3.8000 (96.5mm). Ring Groove size's are 1-5/64, 1-3/32 and 1-3/16. Pin diameter is 0.9122. These pistons have flat heads Compression Ratio: 9.5:1 and Compression Height is: 1.760 Note to our Customers: The above Picture may not be of the actual Pistons, but the specifications and Applications are 100% Accurate - Guaranteed
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By 46yblock - 14 Years Ago
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I noticed Speedway offered 312 pistons and sent a question asking about the country of origin. Pistons were only something like $220. They sent back a response that said the suppliers of their parts did not provide Countries of Origin, so the information wasnt available. I guess my fall off the Turnip truck was rougher than I thought. Has anyone tried the Speedway pistons?
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By scott5560 - 14 Years Ago
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I just ordered my 292 pistons from speedway last week. When i inquired about them was told they were made by EGGE. And i believe part of the part # they use was same as egge part #. So 312 pistons may be made by them too.
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By John Mummert - 14 Years Ago
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Mike, the forged piston supplier is quoting me 8-10 weeks for the forged pistons. They are out of forgings so they need to be ordered and then the pistons made. I can likely get the Silvolites in .060" over. They are made south of the border and are pretty heavy but my supplier usually has them. I might be able to get some flat top forged pistons made sooner if that works for you.
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By speedpro56 - 14 Years Ago
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If you're willing to go to .075 over a 312 size ( 3.875 ) then you can use 283 pistons which are not hard to come by. Just alittle work on pin size and you have a perfect fit.I'll bet John can get those easy enough and add alittle more power to the Y as well.
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By 46yblock - 14 Years Ago
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John, Gary, I will wait for the forged domed pistons, now that I know they are on the way. I was worried, because the pistons are the only component missing, except a rear seal, and maybe head gaskets. Will a standard Felpro comp head gasket work on 3.860 bore?
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By aussiebill - 14 Years Ago
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46yblock (3/11/2011)
John, Gary, I will wait for the forged domed pistons, now that I know they are on the way. I was worried, because the pistons are the only component missing, except a rear seal, and maybe head gaskets. Will a standard Felpro comp head gasket work on 3.860 bore? Works on mine.
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By PF Arcand - 14 Years Ago
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I don't know how common 312-.060 over pistons used to be, or if the following has any bearing on the current situation. But as I recall, Ford only made pistons up to 0.40 thou over size for 312s.
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By PF Arcand - 14 Years Ago
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Gary: I'm sure that many of the guys on this site, would just love having to admit that their 312 Ford had 283 Chivy, (cough, spit) pistons in it....
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By Hoosier Hurricane - 14 Years Ago
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I have 283 pistons in my 312 in my car hauler, but I wouldn't do it again. The tops of the pistons have to be cut to Ford compression height, the Ford rods honed to the 283 pin size, the small ends narrowed to fit between the piston bosses, the pins shortened, and the piston pin bores machined to accept the pin locks. I did all this to save a block that was already .060 over. When it was all said and done, it wasn't worth the effort.
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By Y block Billy - 14 Years Ago
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I swear I removed a piston from a Ford 3.0 or 3.8 V6 a few years ago and it measured 3.80" what the pin diameter and location were I don't think I measured, any one know if those would work? they must sell those oversized.
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By John Mummert - 14 Years Ago
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I've seen a number of 312's rebuilt by Ford reman shops with .0425" O.S. pistons. Where did they get rings for those pistons?
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By 314 - 14 Years Ago
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i had a set of these in a 292 truck engine i didnt know they were 312 pistons until i happened to measure the bore.i just used a set of .040 rings.what else could you do.
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By Ted - 14 Years Ago
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314 (3/16/2011)
i had a set of these in a 292 truck engine i didnt know they were 312 pistons until i happened to measure the bore.i just used a set of .040 rings.what else could you do.Did you happen to measure the ring end gaps on that build?
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By 46yblock - 14 Years Ago
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John (Ted Tim or anyone), what is the piston pin height (compression height) of the forged dome pistons, and plus minus variance? Using the new rods and one of the .040 OS pistons that were in the engine, I should be able to figure out the decking required.
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By 314 - 14 Years Ago
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yes i always check the gap.i cant remember what it was but it looked good in the cylinder.these pistons have to be made for .040 rings.
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By John Mummert - 14 Years Ago
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Mike, the forged pistons have a pin ht. of 1.785". Measure thr rods you check the deck with. I've seen .014" variation in used rods due to factory tolerance and the number of times they have been resized. They get a little or a lot shorter everytime time they are resized.
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By 46yblock - 14 Years Ago
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John, the rods will be the 312 replacement rods you sent 3 or 4 weeks ago. Thanks for the good news on the pin location.
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By Daniel Jessup - 14 Years Ago
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FWIW, I just received a set of pistons from Speedway (30 over 312), and the set was made by Egge. Had all their packaging, stickers, etc in the box...they are flat-tops, going in my C2AE 292-312 build (eventually)
Time has escaped me these past 3 months! 
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By 46yblock - 14 Years Ago
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Daniel, how do they look? I'm curious, what do they recommend for clearance? My new forged popups should be in the mail coming this way, now  . The sonic test on the 312 block showed it good for the .060 OS, with a couple cylinders requiring a little offset boring.
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By Daniel Jessup - 14 Years Ago
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Mike, for some reason, my photos that are stored on Photobucket are not coming through any of the websites that I have posted/linked them, past or present. Cannot view anything stored on there. I think the taper was .0005 and the clearance was .0025, but don't quote me on that yet. I would have to go out and see the paperwork in the box again. I did ship a piston and a set of rings down to the boys at Felts Machine (almost 5 hours away from me) in Suffolk, VA, where they are working my block over. Made copies of all of the documentation. How do they look? I think they look GREAT! But what in the world do Y know? Sometimes I think I'm still a rookie, although my new cam and lifters went in great with no problem...if I could only talk my father in law in to letting me put that supercharged engine in his club sedan.... EDIT: links now back up...dont know what all that was about!
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