9 replies to this topic

[sam138]

what sort of spec 1293 would i need for a reliable high mileage 1293 been looking at sw5 or 266 cam and would like 90bhp flywheel .I have read that the cam determins block life , What sort of mileage do you get with each cam and bore size any spec with mileage you guys have would be nice so i can get ideas.

[holmesy]

it all depends on how you drive, if you a fast cam like i do (286) then you need to have revs up quite high to ensure you stay on the power, a 266 is a good road cam with good low down torque so high rpm is not need therefore the engine will not be wearing as fast.....but.....

if your ragging the engine constantly then it wont last as long a you driving slowly with a 286.

you wont be seeing figures anywhere near 90bhp with the sw5 or kent266 N/A

i would expect if you drove nicely on a 266 with good quality parts and oil etc then i would say you could see around 25k+ miles before things need to be refreshed.

decide what you want: Power cheap reliability, you can have two of them

[sam138]

oh right does not seem alot of mileage for the expense compared to my stage 1 998 which has gone around the clock and still pulls well with a regular service . Would you gain more with a standard cam and have a high spec head or go for a turbo low psi .

[holmesy]

an option for you could be a 1293 turbo with a 266 cam at say around 8psi of boost, a ported head, 8.1 compression ratio, worked crank say wedged and balanced to make the bearings take less weight. good strong gearbox, good bearings, good oil pump.

this would give you at least 90bhp at the flywheel and would give great reliability and if you do the work yourself can be done fairly cheaply compared to a fully worked 90bhp N/A engine

[sam138]

are turbos reliable as have heard you get a bit of a problem getting them set up and will this give the 25k mileage as it will not have to rev so hard i take it . not to sure what my driving style is i take my 998 1st to 10mph then 30mph 2nd , 3rd to 50mph, then 4th. dont know if this is hard working or not dont have a rev counter. And will a set of 21262 pistons be ok for a turbo build .

[holmesy]

does sound like you are reving the engine too high for my liking but then i had a tacho.

nothing too hard with getting turbos set up, your best bet would be heading other to the turbo section and asking around for piston setup as i dont know about that but some of the guys will of been running for 30-40k plus miles on their simple turbo setups im sure

[sam138]

ok thanks for the advice and i will have a search on the turbo mini fourm .

[holmesy]

plenty of people on our turbo forum as well that can help

[MRA]

There is no reason why you can't get a lot more miles, most is down to build and parts quality.

[Cooperman]

Cylinder bore life is down to 4 basic factors: The compression ratio, how high it is consistently revved, the accuracy of the setting-up and how often the oil is changed.
Using only 10 mph, 30 mph, 50 mph then into top means low revs. Even the original Cooper 'S' with a 3.76 FDR would normally go faster than that in each gear and we used to reckon on 30 in 1st, 50 in 2nd, 68 in 3rd and 90+ in top.
However, if you get a 1275 to give 90 bhp you will need quite a 'hot' cam, like a 276, which will only give that 90 bhp at around 6100 rpm. To use that power then you would be revving quite high.
A better bet would be a 266 cam, a top quality build with a good head and around 80 bhp.
Remember, the Mini is a classic car, not a modern Euro-box.