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Aftermarket "Fire Crater" Pistons & Ring Size


 
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RTR
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PostPosted: Thu Oct 31, 2019 11:56 am    Post subject: Aftermarket "Fire Crater" Pistons & Ring Size Reply to specific post Reply with quote

So my 1953 Farmall Super A has the domed aluminum Fire Crater Pistons in it. The rod bearings are dated 1968 but that really doesn't mean anything other than they aren't original. From my knowledge, if the pistons are actual an IH part, they would be marked as such on top or the skirt. These pistons only have the marking "FRT" with an arrow on top. They also have 4 numbers on the inside of the piston (the exact numbers escape me right now). There are no other markings anywhere that I can find. This tells me they are most likely aftermarket pistons and not IH ones. They are visually IDENTICAL to the IH Fire Crater design. I need to get a set of piston rings for them and need a little help identifying which ones I have. I can always measure the rings but I'd also like to know what I've got. The rod bearings are Clevite brand so I wonder if the pistons are too???
 
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rustred
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PostPosted: Thu Oct 31, 2019 3:57 pm    Post subject: Re: Aftermarket Reply to specific post Reply with quote

when ordering rings , all you need is the bore of the engine and the ring width. makes no difference what brand of piston they are going on. rings should be the easiest thing to get. rings would be 1/8", 3/16" or 1/4" as an example. the oil rings are usually wider than compression rings. plus pay attention to the ring marks and bevels. that "FRT" on pistons means that arrow faces the front of block.
 
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RTR
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PostPosted: Mon Nov 04, 2019 9:11 am    Post subject: Re: Aftermarket Reply to specific post Reply with quote

CVPost-rustred wrote:
(quoted from post at 04:57:48 11/01/19) when ordering rings , all you need is the bore of the engine and the ring width. makes no difference what brand of piston they are going on. rings should be the easiest thing to get. rings would be 1/8", 3/16" or 1/4" as an example. the oil rings are usually wider than compression rings. plus pay attention to the ring marks and bevels. that "FRT" on pistons means that arrow faces the front of block.


Here is what I found.......







 
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RTR
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PostPosted: Mon Nov 04, 2019 9:14 am    Post subject: Re: Aftermarket Reply to specific post Reply with quote

And here are some pictures of the measurements and a picture of the number cast on the inside of the piston.











 
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RTR
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PostPosted: Tue Nov 05, 2019 5:11 am    Post subject: Re: Aftermarket Reply to specific post Reply with quote

CVPost-rustred wrote:
(quoted from post at 04:57:48 11/01/19) when ordering rings , all you need is the bore of the engine and the ring width. makes no difference what brand of piston they are going on.


I was told by a well known IH Parts Man that you must measure the piston grooves to get the rings because some aftermarket pistons had different sizes.
 
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RTR
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PostPosted: Tue Nov 05, 2019 10:45 am    Post subject: Re: Aftermarket Reply to specific post Reply with quote

RTR wrote:
(quoted from post at 18:11:29 11/05/19)
CVPost-rustred wrote:
(quoted from post at 04:57:48 11/01/19) when ordering rings , all you need is the bore of the engine and the ring width. makes no difference what brand of piston they are going on.


I was told by a well known IH Parts Man that you must measure the piston grooves to get the rings because some aftermarket pistons had different sizes.


From those measurements; Would y all agree that it is safe to say that the compression rings are 3/32" (2 of them) and the oil ring is 1/4" ?
 
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