3 replies to this topic

[bg158a]

I have a 1990 mini that I have just bought, it is in need of a little work to get it back on the road. At present it has a 1275 MG metro engine fitted. I am going to run it for a couple of months and then look at some serious engine mods. I need to keep the cost of the mods sensible.

My Question is what size should I go for 1275, 1293 1330 or 1380. I realise the extra cc give a potential higher output. I want a good quick road engine that offers reasonable reliability. If anybody has a spec of an engine that they have built and can give a rough cost. Already have Freeflow LCB manifold and RC40 exhaust, standard metro electronic ignition. Current engine is very healthy though the gearbox needs some work grinds going in and out of 3rd gear.

[Prawn]

personally, id go for a 1380

because it IS going to cost you a fair bit, what with buying new pistons, and all the machine work, id go for teh biggest you can on your initial outlay, so 1380

ive just finished mine last week, and its now up and running.

spec is as follows:

A+ block bored to 73.5mm, centre main strap fitted
wedged and X-drilled cooper S crank
Cooper S steel rods
powermax 73.5mm pistons
MSPD trackday cam
vernier duplex timing gear
stage 3 37x29 unleaded head
1.5:1 roller tip rockers
mspd billet steel flywheel, orange diaphram, rally clutch plate, lightened backplate
JKD SC 1:1 drop gears
JKD SCCR 4spd box
JKD X-pin diff

thats about it i think,

several parts were sourced second hand and refurbished,
i think its cost me around £2500 in total and im very happy with it

just got to run it in now.... then take it to coombe in september to see what it can do!

[Guess-Works.com]

I'd stick at 1330 (+.060 over std) ... with some 21253 cooper pistons...

It always leaves one life in the engine left which is the bore to 73.5mm

[mini_sam]

hayabusa turbo conversion!! not very practical or reliable, but a hell of a lot of fun!