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| mini heads https://www.ausmini.com/forums/viewtopic.php?f=2&t=38991 |
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| Author: | mattsmadmini [ Sun Dec 23, 2007 9:41 pm ] |
| Post subject: | mini heads |
ok, so yes, i still am quiet the noob.... just curious with wats the difference with heads, i have a 1098 engine but i see people throwing in 12g202 and 12g295 and i have no idea wats the deal-io here..... please help..... dont laugh.... lol... another thing, is it possible to convert from leaded to unleaded fuel using the stock head? cheers, matt |
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| Author: | mini-dunger [ Sun Dec 23, 2007 10:14 pm ] |
| Post subject: | |
yes you can have unleaded seats fitted to your current head. |
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| Author: | drmini in aust [ Mon Dec 24, 2007 6:27 am ] |
| Post subject: | |
A standard 1098 has a 12G202 head. This is also the head fitted to most 997 Coopers and mk2 Sprites. It has square intake ports and 1.156" inlet valves. a 12G295 head was fitted to 998 Cooper, Mk2A Sprite and MG1100 (UK). It has bigger square ports, 1.219" inlet valves, and a much better chamber shape. It's the best smallbore head BMC made, but chambers are too big (giving a low C/R) unless running flat top pistons. A 202 head can be modified to perform just as well or better than a 295 one. See Russell Engineering in Sydney. To see which head you have, remove rocker cover and look for numbers CAST on top of head, under the rocker gear. |
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| Author: | mattsmadmini [ Mon Dec 24, 2007 10:22 am ] |
| Post subject: | |
cheers doc! you have yourself a very merry christmas! |
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