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alan-nj 
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Joined: 12 Sep 2009
Location: oxford, nj
Points: 845
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 Topic: more piston ID
Posted: 02 Jan 2011 at 8:14am |
As long as benny rasied the question, i thought i'd ask the same thing. i had the head off my 48 wd last week. this is the piston that is in it. 4 and 1/8 bore. obviously not original. made out of aluminum. can anyone identify the brand? are these m & w or some other brand? thanks alan 
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Denis in MI
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Joined: 15 Sep 2009
Location: Norvell, MI
Points: 832
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Posted: 02 Jan 2011 at 8:16am |
M&W I have a set in a WD45.
Hope that helps,
Denis
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1938 B, 1945 B, 1941 IB, 1949 C, 2 1938 WCs, 3 1950 WDs, 1951 WD, 2 1955 WD45, 1957 D-14
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alan-nj
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Joined: 12 Sep 2009
Location: oxford, nj
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Posted: 02 Jan 2011 at 8:29am |
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thanks. i put a set of m & w in my wc a couple of years ago, but i didn't remember exactly what they looked like and i didn't take any pictures.
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Allis Fields
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Joined: 17 Sep 2009
Location: Reedsburg,Wisc.
Points: 332
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Posted: 02 Jan 2011 at 5:11pm |
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Have you checked what the stroke is? 4" is wd 4.5" wd45 crank. M&W ap46 is thw wd - wc part number I think.
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Allis orange blooded by family. Allis Diehard by choice
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mlpankey
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Joined: 13 Sep 2009
Location: Vols country
Points: 4580
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Posted: 02 Jan 2011 at 5:29pm |
 alan-nj wrote:
As long as benny rasied the question, i thought i'd ask the same thing. i had the head off my 48 wd last week. this is the piston that is in it. 4 and 1/8 bore. obviously not original. made out of aluminum. can anyone identify the brand? are these m & w or some other brand? thanks alan |
while you have the head off take a syringe in ccs and see how much fluid that dish holds and how far below the deck the outside ledge is at tdc for me . will you?
Edited by mlpankey - 02 Jan 2011 at 5:30pm
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alan-nj
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Location: oxford, nj
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Posted: 02 Jan 2011 at 6:18pm |
mitch.. sorry, the head's back on the wd. but, i will be pulling my wc apart sometime this winter. the wc has the m&w ap48 pistons. let me know if you want those measured. allis fields...the wc has a 4 1/2 inch stroke, the wd has a 4 inch stroke. alan
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wi50
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Joined: 24 Sep 2010
Location: weegieland
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Posted: 02 Jan 2011 at 6:28pm |
I think the M&W's hold about 70cc. I will check for sure, I have both AP46 and AP48 bead blasted and cleaned up. I'll take a piece of plexiglas and a syrenge and check for sure in the next day or two. I'll also post the compression height.
I know with the CC of the dish and the comp height, I figured them at just shy of 7.5 comp, but I didn't have any plexiglas and the CC measurement was only "close".
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"see what happens when you have no practical experience doing something...... you end up playing with calculators and looking stupid on the internet"
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Steve M C/IL
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Joined: 01 Jul 2010
Location: shelbyville IL
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Posted: 02 Jan 2011 at 11:03pm |
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No plexiglass and allowing for surface tension,my sp48 M&W's held 83cc.The new sp48 sold by Hershal Adams held 90cc.
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