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1cm |
Re: 1cm Well it for sure has Mercury heads but has Ford three bolt carb so it's a toss up!:cool:
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Re: 1cm Sorry Beater, but I'm not sure why there are continued efforts to ID cranks (and blocks) by evaluating bolted on bits, and by looking at the outsides.
Even as beautifully and evenly crusty as this one is... The internals may have been done fifty years ago. Might it be a long throw crank? Yeah, but the type of cylinder heads will never (or any bolted on component) be definitive evidence. |
Re: 1cm Pickups didn't come with the 255 even if its a Mercury pickup. I have one 1CM head on one of my 51 Mercury cars but the other one has 8CM heads on both sides. The stroke length & piston pin location is the only difference between a basic Ford 239 and a basic Mercury 255. The Mercury 1CM head may compare to an 8RT truck engine head as far as compression ratio is concerned.
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Re: 1cm Pretty much the same response here as over on the HAMB. Only way to know for sure is to pull a head and measure the stroke.
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Re: 1cm Seems to be some betting going on here lately, so my money is on a stock Ford 3 3/4" stroke. Back in the day, there were a lot of folks who thought Mercury heads were superior to Ford heads because the Merc's had a higher HP rating from the factory.
They were wrong. |
Re: 1cm im sorry guys, i should have given more info. this is in a 51 mercury M6 truck. truck was my grandfathers. 20,000 original miles. the truck has never left the farm, and has never had any work dont to the engine. that is fact , not guessing. purrs like a kitten. so im tossing around the idea of useing the engine in a rod. i expected to see 8BA on the heads. im not about to pull a head to find out for sure however
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Re: 1cm Pull it from your grandfathers truck with 20,000 miles for a hot rod? April fool right?
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Re: 1cm Since it is a Mercury M6, Does it have Canadian 1CM heads on both sides? Canada always did things a fair bit different than the US cousin prior to the buy out by Ford Dearborn. The reason I ask, is that both of my 1951 Mercury cars were early 1951 manufactured in December 1950 at the same plant in Saint Louis, MO. One has never been apart and it has 8CM heads. The other had an overhaul by one of my uncles back in the late 50s and I think the 1CM head was the replacement part for a cracked head. I can't confirm it since none of the folks involved are currently living but I've always wondered why it only had one 1CM head. When the 1952 engines came out, they changed to EAC 255 heads to increase the compression a bit just like they did with the EAB Ford 239 higher compression heads. Trucks in the USA seem to have mostly 8RT heads in 1952 & 53 and possibly much earlier for the most part.
Another question would be to any late 1951 Mercury owners out there about whether they have 1CM heads on both sides or not? I am just wanting to confirm whether they were used in 1951 production or whether they were just replacement heads. Ford may have changed a mounting location such as the oil filter canister or something of that nature as well. |
Re: 1cm Beater can we get some more pictures of the truck sounds pretty exciting to me and i’ll bet some other fellows to
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Re: 1cm My '51 Mercury was built March 13, 1951, at the St. Louis plant. It has the late '51 transmission and 8CM heads.
Ken |
Re: 1cm I’ve seen quite a few 1cm heads on the east coast that are suppose to be factory mercury heads. (So I’ve been told) My mercury engine came with eac heads 4” crank from an unknown pickup from a old paving company. (Still stock bore)
I’ve seen 8cm heads on ford cars and ford trucks up here. Who knows about rebuilds |
Re: 1cm 1cm heads on both sides yes. i know its never been touched.
no its not an april fools joke, the truck sits and does nothing. once or twice a year i run it up and move it around just to keep it from going any farther down hill. im very torn on useing it for something else allrighty, but however. costs a lots to build one |
Re: 1cm 1 Attachment(s)
There were Merc trucks in Canada that came with the 255. I had understood it was only '52's, but possible that also in '51. Only in M5 and M6 "big" trucks.
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Re: 1cm After finding that the truck is an M6, I am revising my bet. (I originally thought it was a pickup.)
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Re: 1cm Quote:
Since I have a Canadian 1950 Mercury and not a Monarch (yet) 1949 and 50 Canadian Mercury in both the Mercury and Monarch flavors had heads with C8CM with Made In Canuckastan casted directly below. In 1951 our heads had C1CM and the same casted comment below made in Canuck American 1949-50 had 8CM and 1951 1CM and I suppose I have an American 1951 core in my hoard as it has 1CM on the heads. My transmission also being a Canadian Borg Warner with OD has the same part number as the American parts manual BUT has a C in front of the part or casting number. The additional C in the model and part number indicates Canadian or perhaps Complicated:D Oh and our trucks also had 8RT heads, both in Ford and Mercury trucks. I have seen a number of them over the years as well. Who the heck knows about the Mercury and 255 but anything is possible? My father used to have a 1952 Mercury M7 3 ton and it is unknown to me what it had under the hood because he sold it over 40 years ago. In the owners manual I was surprised with the engine options! The flathead V8 of course, a 317.5 Lincoln engine and this was the same year it was offered in Lincoln replacing the 337 flathead and to my surprise a Diesel engine as well, possibly a Detroit?? I will dig around and see if I still have the manual which would be hard to find now being a Canadian Mercury truck. One thing is for sure is the Meteors in the same time period and up to 1954 had the 255 in them quite often. I had a 1954 Meteor and it had the 255. |
Re: 1cm Does it follow that these engines with the !CM heads will probably have a 1CM cam fitted?
Phil NZ |
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