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| 940 head on smallbore? https://www.ausmini.com/forums/viewtopic.php?f=2&t=17565 |
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| Author: | minif1 [ Sun Mar 26, 2006 3:48 pm ] |
| Post subject: | 940 head on smallbore? |
Can anyone tell me if I can fit a 12G940 will fit onto a 1098 engine? I've heard it can be done what needs to be done to make it fit? Do I need to get my block pocketed? |
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| Author: | CPOCSM [ Sun Mar 26, 2006 4:03 pm ] |
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Yes you need to get the pockets for the block....HOWEVER, I ran one on a 998cc and had it on there for 12 months without the pocketing. However you cannot rev it hard and definitely STD cam and rocker gear. Saying that though - it went like a cut snake until I decided to go back to a 12G202 instead. Dave Hamills book "How to Powertune BMC/Leyland 998cc" is a good reference. Hooroo Rob Forsyth Miniot!! |
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| Author: | drmini in aust [ Sun Mar 26, 2006 4:19 pm ] |
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If you run stock rockers and a cam with less than .290" lobe lift, you can get away without pocketing a 12G940 (or a 12G1316) on a road motor. As long as head is hardly decked and ex valves are sunk in a bit (as most are these days). There's an article by Keith Calver in Feb 06 issue of MINI Magazine. I did one (on 1100 bored to 1220cc) back in 1968, with a 544 cam and pocketed block, yes it did go rather well... 
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| Author: | minif1 [ Sun Mar 26, 2006 4:55 pm ] |
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It's just got one of them kent 266 cams in it. I'm running std rockers. The head has been decked .10thou. Do you think this would work without pocketing? Where can I get a block pocketed if need be? |
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| Author: | Lillee [ Sun Mar 26, 2006 5:31 pm ] |
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CPOCSM wrote: Dave Hamills book "How to Powertune BMC/Leyland 998cc" is a good reference.
Miniot!! That's Des Hammill
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| Author: | drmini in aust [ Sun Mar 26, 2006 6:26 pm ] |
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minif1 wrote: It's just got one of them kent 266 cams in it. I'm running std rockers. The head has been decked .10thou. Do you think this would work without pocketing? Where can I get a block pocketed if need be?
Yes it should be OK without pocketing. Graham Russell could do it, if motor is not in car. I did mine IN the car way back then, kazjim on here did his recently the same way, using a die grinder and stones. Buy Des Hammill's book and go for it if you want, it has step by step instructions- but if it's not going to be over-revved, you should get by without it. 
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| Author: | minif1 [ Sun Mar 26, 2006 6:41 pm ] |
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What would you consider over revving? Like above 5000? Thanks everyone for the help. |
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| Author: | drmini in aust [ Sun Mar 26, 2006 6:53 pm ] |
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with decent double valve springs, 7000-7500.
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| Author: | CPOCSM [ Sun Mar 26, 2006 7:58 pm ] |
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68Delux wrote: CPOCSM wrote: Dave Hamills book "How to Powertune BMC/Leyland 998cc" is a good reference. Miniot!! That's Des Hammill Des, Shmes - who cares...its a good book!...lol Hooroo Rob Forsyth Miniot!! |
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| Author: | simon k [ Sun Mar 26, 2006 9:25 pm ] |
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KAZJIM.... 
thread here... http://www.ausmini.com/forums/viewtopic ... ght=pocket |
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| Author: | minif1 [ Mon Mar 27, 2006 6:59 pm ] |
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I never knew you could do it yourself with a grinder. Learn something everyday. One last question. Would I use a 1275 head gasket, since I'm using the 1275 head. Or do I stick with the 1098 head gasket? |
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| Author: | willy [ Mon Mar 27, 2006 7:00 pm ] |
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Sexual
And thats how to make a 998 really go
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| Author: | 92 [ Mon Mar 27, 2006 7:06 pm ] |
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I did mine in car with a die grinder and yes use a 1275 head gasket |
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| Author: | drmini in aust [ Mon Mar 27, 2006 7:16 pm ] |
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The 1275 BK450 gasket is the best one these days, but KC says watch the front water holes near #4 cylinder.. you may need a 12mm plug screwed into one of them. Details in Feb 06 issue of Mini Mag. Rule of thumb is you always use the gasket that belongs to the head type. A smallbore gasket will not seal all the water holes in the head.
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