Hi all.

I've just joined the wonderful world of Mini ownership with the purchase of a 1970 Cooper S Replica.



As a starting point, I'm curious to know roughly how many ponies might be living under the bonnet. I have a 1330cc motor, fed by a Weber 45mm DCOE carb. Beyond that I don't know what other technical trickery has been carried out.





On a second point, the traditionalist in me (I've appreciated Minis for years, but only just got one) says I should really bung a pair of SUs on it. what kind of difference would that make from the Weber, not just in outright power, but in overall character & power delivery through the rev range?

I eagerly await your expertise.

My 1275 has 45bhp ATW so I'd guess a 1330 would have between 50 and 60bhp at the wheels.

_________________
Respect mine and I'll respect yours.

It is near impossible to say what HP your engine should be making without knowing what has been done to it, the other factor is what condition the engine is in.

For street up, IMO, a Single SU is hard to beat. Certainly quieter than the Weber, slightly better torque production lower in the RPMs and better fuel consumption. Twin SU's have similar benifits but take up more space than they are worth, also need a bit more fiddling about to set them up, but for that 'replica' look, it would need twins with the correct air filter box.

Higher in the RPMs, the Weber is king.

All this is on the basis that whatever carburation you have has been set up correctly for your engine spec.

Enjoy you Mini, certainly looks nice

_________________

can a 4.5% increase in displacement really give up to 25% increase in power?

_________________
tim
68 Deluxe 1293, HIF44, megajolt/EDIS4, daihatsu alternator..

'a mini is for life, not just for christmas!'

As GT m, said it all depends on what else has been done, and the engine's condition.
The secret to getting power from these things nowadays in the camshaft, above all else. Hanging a Weber and bigger zorst on an otherwise stock motor does not give a lot of HP gain. Maybe 10HP at crank more than the non-S 1275's stock ~63HP.

_________________
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.

yeah, nah... at 45 ATW, yours is a bit sad

but your range is probably right - depending what's been done inside, a mild tune is anywhere from 50 to 60

I had mine on the rollers in Sydney with a stupid points gap and it was 46, fixed the points and it was 51, then after a rebuild & some mods it was 61

f you want it to be a replica,
you need overriders with corner bars, and a little S above the bonnet badge.

put some more pictures so we can tell you more.

keep the weber.

also, 50-65hp at the wheels i would guess without knowing any specifics.

have you got disc brakes?

Is that a pushbike in the back?

_________________

68 Morris Cooper S Mk1 (*ex 78 1275 LS 4th last built, 70 Morris 1500 OHC & 70 MiniMatic)

Thanks for the feedback.

There are a couple more pics here, but no more in the engine department yet. "Replica" could possibly be too strong a term; it started out as a 1100 Mini K that has been "Cooperised" over the years. It does have disc brakes, also 12" rims. At time of writing I've only had it for a whole four days (and for two of those it has been at my mechanic getting roadworthied for registration purposes), so I haven't had a chance to really suss out exactly what's in there yet. So apologies if my info is a bit vague, but for starters I just wanted to roughly know what it's capable of.

And yes, that is a bike in the back!

Looks like my guesstimate is in the ball park...
Yeah I know 45 is a bit low but it is a 21yo stock A+ that hasn't been tuned in at least 3 years I still keep up with all the S's around here though, even at full tilt

_________________
Respect mine and I'll respect yours.

Looks like it...Maybe half a push bike.
Welcome to the forum Duckmiester.
If you put your location in your sig, the gurus and geniuses around here
will be of more use to you.

Have fun replacing the clock springs in the door handles!!!

_________________

http://www.youtube.com/user/Hanras

i thought it had the super rare optional 26inch steering wheel!

It IS a whole bike, although I had to take both wheels out of the frame in order to stuff it all in.

And I do have location info over..
<-- there.


Shouldn't be much worse than bike rear derailleur main pivot springs, which require nearly a full turn once the ends are located before dropping it all into place & slipping the retaining circlip on.

are you able to use both hands, and your eyes to do that job?