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Joined: Jan 2011
Posts: 96
Shade Tree Mechanic
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OP
Shade Tree Mechanic
Joined: Jan 2011
Posts: 96 |
In a discussion on Stovebolt Forum (on 10/17/10) Denny Graham makes the statement, "We've all heard how the 848 head is the head that you want to use . . . " He was referring to head with casting number 3836848.
1. Is head 3836848 actually more desirable? If so, why?
2. Can head 3836848 be used on a 216 CID engine?
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Joined: Dec 2001
Posts: 11,162
ChatMaster - 10,000
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ChatMaster - 10,000
Joined: Dec 2001
Posts: 11,162 |
this head has higher compression ratio than older 235 heads and the latest "improvements" for the 235, is it more desirable, that depends. It is probably more available now than the older heads.
No it won't fit a 216.
Life's a long winding trail, love Jesus and ride a good horse!
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Joined: Jan 2002
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ChatMaster - 25,000
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ChatMaster - 25,000
Joined: Jan 2002
Posts: 30,701 Likes: 141 |
The 848 head came on the 1956-1962 engine. The head started with a 8.00 to 1 compression ratio in 1956, raised to 8.25 in 1957. Is the same as an earlier (1953-1955) head except for the method of attaching the temperature sender and the older ones having a 7.50 to 1 compression ratio.
A 1950-1962 235 head is completely different from a 216 head and the 216 head is the same as a 1941-1949 235 head.
Last edited by Chev Nut; 01/14/11 10:38 PM.
Gene Schneider
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I would like to extend this question and ask about the extra coolant holes when these heads are used on a 261. I am curious what they do and if one with these holes could be used on a 235. I have seen some folks refer to them as "steam holes".
My 1951 1 Ton is now on the road! My 38 Master 4 Door is also now on the road .
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Joined: Jan 2002
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ChatMaster - 25,000
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ChatMaster - 25,000
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The steam (water) holes are used on the 261 head because the cylinders have no water cooling between them due to the larger bore. If you drill the holes in a 235 head and install it on a 261 you will raise the compression ratio. If you were to install the 261 heads on a 235 you would lower the C.R.
The 261 head has larger combustion chambers due to the larger cylinder displacement.
Gene Schneider
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Joined: Sep 2002
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Thank you for that information Gene.
My 1951 1 Ton is now on the road! My 38 Master 4 Door is also now on the road .
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