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sean
 Post subject: Heads
PostPosted: Fri Mar 04, 2005 4:15 pm 
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as mentioned on an earlier post of mine, i have two spare cylinder heads but don't know what the are off. how can i identify them easily ? anyone help ?

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gafmo
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PostPosted: Fri Mar 04, 2005 4:24 pm 
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What number are on them :arrow:

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sean
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PostPosted: Fri Mar 04, 2005 4:38 pm 
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Don't know, will have a look after work, what am i looking for ?

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cush
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PostPosted: Fri Mar 04, 2005 4:46 pm 
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abcdefghijklmnopqrstuvwxyz1234567890

any combination of the above




:roll:

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sean
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PostPosted: Fri Mar 04, 2005 4:50 pm 
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Yeh funny

what numbers mean what ?

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cush
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PostPosted: Fri Mar 04, 2005 4:52 pm 
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you're looking for


12g202 or 12g295


anything else is just boring :)


http://drcwww.kub.nl/~bogaard/heads.htm

or there :)

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drmini in aust
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PostPosted: Fri Mar 04, 2005 6:02 pm 
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Take off the rocker cover. Under there in all the crud is a number cast (not stamped) into the head.

For a Mini, could be-
12A1456
12G202
12G206
12G295
12G940
12G1316
CAM4180
12A185
AEG163


Let us know what you discover! 8)

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sean
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PostPosted: Fri Mar 04, 2005 9:17 pm 
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Both are 12G202 So what are they, are they any good ?

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drmini in aust
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PostPosted: Fri Mar 04, 2005 9:22 pm 
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sean wrote:
Both are 12G202 So what are they, are they any good ?

They are 1098 heads- used on Morris 1100/Mini K/997 Cooper/1098 Clubbie. Inlet ports are square.
Not as good as a 295 head, but can be modified (with much work) to flow just as good or better.

Much better than the old 12A1456 (850 & 998) heads that had smaller inlet valves and ports.

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DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R. :mrgreen:
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sean
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PostPosted: Fri Mar 04, 2005 9:32 pm 
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848cc
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Thanks

i have a 998 motor in my clubbie, so would it be worth cleaning one of the 12G202 heads up and installing, what performance improvements would i gain and if none how could i modify ? :?

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drmini in aust
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PostPosted: Fri Mar 04, 2005 9:38 pm 
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sean wrote:
Thanks

i have a 998 motor in my clubbie, so would it be worth cleaning one of the 12G202 heads up and installing, what performance improvements would i gain and if none how could i modify ? :?

If you clean it up and machine 1.5mm off it (as chambers are bigger than your old 998 head ones) it's worth around 4HP. I stuck one on my 998 `matic and it made quite a difference. 8)

<edit> For further increase, fit 998 Cooper inlet valves, recut the seats and port it to suit. Follow Vizard's book.
Of course then it needs a cam, bigger carbs, exhaust, yada yada... :wink:

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DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R. :mrgreen:
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sean
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PostPosted: Fri Mar 04, 2005 9:46 pm 
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What do you reckon it would cost to get 1.5mm milled off ?

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drmini in aust
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PostPosted: Sat Mar 05, 2005 6:01 am 
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$50 I used to pay. Now I do my own.... :P

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DrMini- 1970 wasaMatic 1360, Mk1S crank, 86.6HP (ATW) =~125 @ crank, 45 Dellorto (38 chokes), RE282 sprint cam, 1.5 rockers, 11.0:1 C/R. :mrgreen:
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