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Difference between 200 & 250 Xflow head?? 

 

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 Post subject: Difference between 200 & 250 Xflow head??
Posted: Mon Aug 20, 2007 9:02 pm 
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Just wondering how one could tell the difference between a 3.3ltr head and a 4.1ltr head. As I have found one "on the side of a road" and I am unsure of which particular head it is.

Any info, or photos would be great.

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Posted: Mon Aug 20, 2007 10:11 pm 
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combustion chamber volume and design, on the intake side there should be a number stamped between #1 and #2 intake ports what is the number

also origionaly a sticker on em

 

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Posted: Mon Aug 20, 2007 10:15 pm 
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According to the genuine Ford w/shop manual, nothing, the only difference is comp ratio from XD to XE, only by the chamber volume.
The numbers being refered to are ones like HF1, HF3, HF5 and HF7.
HF7 is unleaded XF.

 

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Posted: Thu Sep 06, 2007 11:57 pm 
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i have a XE hi comp crossflow head bolted on a XC bottom end, XC being a leaded engine had a smaller dish piston, cheap trick for more power.
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Posted: Fri Sep 07, 2007 2:02 pm 
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and the alloy head saved u a crap load of weight

 

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Posted: Fri Sep 07, 2007 6:29 pm 
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yes but the question is referring to 2 alloy heads, one from a 200 and the other a 250.....i have one sittin here, but i dont know what it came off.....tryin to figure out...

 

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Posted: Fri Sep 07, 2007 6:35 pm 
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on the inlet side there should be a letter or number stamped between the #1 and #2 cyls

haveing said this tho some XE 4.1's dident have this

 

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Posted: Tue Oct 23, 2007 9:07 pm 
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absolultly nothing but a casting number
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Posted: Tue Oct 23, 2007 11:45 pm 
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i know on the cast iron ones there was smaller ports not sure on alloy
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Posted: Sat Mar 08, 2008 7:54 pm 
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the different heads were to my knowledge :
alloy head 1 xd series 2
alloy head 2 leaded xe xf
alloy head 2 leaded injected xe xf
alloy head 2 unleaded xf update
alloy head 2 unleaded injected xf update
3.3 4.1 high comp and medium comp were all about the piston dish!!!!
haven't got stamps n numbers but injected generally had e1 or c1 on inlet side...

 

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