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Car Forum / MINI / August 2005A series modifications
I have a Morris Minor with an A series 1100 cc engine - what possible modifications could I make to get better performance? What is easiest or best? Cheers > I have a Morris Minor with an A series 1100 cc engine - what possible > modifications could I make to get better performance? What is easiest or > best? > > Cheers head, cam, carby, inlet and exhaust manifolds. Exhaust system. thats about it really Oh - rather a lot then. I do already have an unleaded mini cylinder head on it - do you mean shave it a bit to change the compression? > Oh - rather a lot then. I do already have an unleaded mini cylinder head > on it - do you mean shave it a bit to change the compression? Your best bhp per pound would probably be to find a cooper 998 head, a 12G295, which has already been modded to fit a later mini and fit that. A fast road cam and a rolling road session would then get the best out of it. There is a bit more technical to it but thats for you to ask when you've got a decent 12g295 ;o) Not sure what free-flow exhaust manifolds fit the minor - bound to be some available somewhere. Small block A series heads flow badly as standard and can be improved upon easily. Chris > Oh - rather a lot then. I do already have an unleaded mini cylinder head > on it - do you mean shave it a bit to change the compression? Basically better breathing. The head mods include reshaping the combustion chamber (taking out the heart bit between the valves) and polish the ports. Twin 1 1/4 SU's should be heaps around set them up to 1100cc Sprite specs thats springs and needles. A better cam suitable for the road. Better exhaust manifold. Was there a special tuning book put out by BMC for the Mini? ( I have the one for the MGB) this shows stages of tune and the expected performance improvement. r If you are intersted i have a breathed upon 12g295 head that i used very successfully on my 1098 A, it has been skimmed but not converted to unleaded. It needs a clean but I could be persuaded to part with it Dave >> Oh - rather a lot then. I do already have an unleaded mini cylinder head >> on it - do you mean shave it a bit to change the compression? [quoted text clipped - 15 lines] > > r THE book to read is "Tuning BL,s A Series" by David Vizard. If it aint in there dont bother doing it! - the guy is a total master. Dave > If you are intersted i have a breathed upon 12g295 head that i used very > successfully on my 1098 A, it has been skimmed but not converted to [quoted text clipped - 21 lines] >> >> r > I have a Morris Minor with an A series 1100 cc engine - what possible > modifications could I make to get better performance? What is easiest or > best? > > Cheers Easiest and best is probably to fit a 1275 engine. Otherwise, follow the route others have suggested but keep the revs down as the 1098 is a long stroke and not very strong. John Even better fit a Fiat Twin Cam > > I have a Morris Minor with an A series 1100 cc engine - what possible > > modifications could I make to get better performance? What is easiest or [quoted text clipped - 7 lines] > > John Thanks, I will certainly read the book, but I think that your suggestion for a larger engine (Midget) would be much more beneficial on the motorway. |
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