Created by: | Orig. Posting Date | User Name | Edit Date |
| Oct 16, 2014 11:58AM | Alex | |
| Oct 16, 2014 09:01AM | malsal | |
| Oct 16, 2014 08:36AM | WeirdEh | Edited: Oct 16, 2014 08:54AM |
| Oct 16, 2014 08:07AM | malsal | |
| Oct 16, 2014 06:18AM | Cup Cake | |
| Oct 16, 2014 05:42AM | Spitz | |
| Oct 16, 2014 05:32AM | WeirdEh |
Posted:
Oct 16, 2014
11:58AM
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From what I remember while researching our Downton head, the .100 means that .100" was skimmed to give a chamber size of 22cc and the serial number of the head is 1131.
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Yep stamped on head is the 100 for skimming and 22 for cc
pic of chambers
//i1136.photobucket.com/albums/n498/Adam_Raeburn/10162014451.jpg
Pic of the ports
//i1136.photobucket.com/albums/n498/Adam_Raeburn/10162014450.jpg
and pic of the stamp
//i1136.photobucket.com/albums/n498/Adam_Raeburn/10162014449.jpg
So now to just order the valves and springs.
so was it worth 200 cdn bucks?
Yes for sure.
If in doubt, flat out. Colin Mc Rae MBE 1968-2007.
Give a car more power and it goes faster on the straights,
make a car lighter and it's faster everywhere. Colin Chapman.
Edited:
Oct 16, 2014
08:54AM
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Total posts: 1677
Last post: Aug 26, 2021 Member since:Apr 21, 2004
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Yep stamped on head is the 100 for skimming and 22 for cc
pic of chambers
//i1136.photobucket.com/albums/n498/Adam_Raeburn/10162014451.jpg
Pic of the ports
//i1136.photobucket.com/albums/n498/Adam_Raeburn/10162014450.jpg
and pic of the stamp
//i1136.photobucket.com/albums/n498/Adam_Raeburn/10162014449.jpg
So now to just order the valves and springs.
so was it worth 200 cdn bucks?
Once you replace everything that is attached to something else. It will all be fixed.
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Total posts: 8382
Last post: Jan 13, 2022 Member since:Feb 7, 2006
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I bought a Head for a 998 from a fellow that said it is a Longman head. it needs a couple of valves replaced. I am looking at it and really want to know how to I tell it really is a longman head? the casting number is 12a1456.
there are a couple of other casting numbers and a couple of sets stamped into the flat spot by the heater take off. the openings look like they might be larger but I have not measured them.
was there anything on the Longman head that lets you know for sure it is what it is?
Performance head specialists usually stamp the top face (outside the rocker cover somewhere) with the specs usually cc and amount skimmed at least.
If in doubt, flat out. Colin Mc Rae MBE 1968-2007.
Give a car more power and it goes faster on the straights,
make a car lighter and it's faster everywhere. Colin Chapman.
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Last post: Aug 19, 2016 Member since:May 13, 2001
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//mk1-forum.net/viewtopic.php?f=5&t=6582
The power of accurate observation is commonly called cynicism by those who have not got it. G.B.S. Sarcasm is the lowest form of wit. Oscar Wilde
//www.cupcakecooper.ca/
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show us pis of the chambers and ports
"Everybody should own a MINI at some point, or you are incomplete as a human being" - James May
"WET COOPER", Partsguy1 (Terry Snell of Penticton BC ) - Could you send the money for the unpaid parts and court fees.
Ordered so by a Judge
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Total posts: 1677
Last post: Aug 26, 2021 Member since:Apr 21, 2004
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I bought a Head for a 998 from a fellow that said it is a Longman head. it needs a couple of valves replaced. I am looking at it and really want to know how to I tell it really is a longman head? the casting number is 12a1456.
there are a couple of other casting numbers and a couple of sets stamped into the flat spot by the heater take off. the openings look like they might be larger but I have not measured them.
was there anything on the Longman head that lets you know for sure it is what it is?
Once you replace everything that is attached to something else. It will all be fixed.
