36 replies to this topic

[fraggle_cooper]

as above really just spied one and am wondering what differences it has over
a standard MPI cooper??
engine or interior differences??
not seen one before,
thanks in advance.

[The_Mistro]

1992: 1275 Cooper 'Si' Pack

The Si Pack consisted of a performance cylinder head (exchange), which was fully balanced, ported and polished and featured a raised compression ratio. A performance exhaust was fitted and retained the standard catalyst.
Also fitted was an oil cooler, a new fan pulley and rocker cover.

This lifted power to 74bhp

Also available was the Cooper 'Si' Plus Pack, this was the same as above except for a large inlet valve cylinder head, a set of high-lift rockers and a K&N airfilter, this lifted the power to 78bhp

All the above came with rear quarter and bootlid decals plus certificates and numbered plate attached to the crossmember beside the drivers seat.
The 'Si' badge fitted to the boot was actually a ford part, from their Fiesta Si.

The 1995 John Cooper Garages brochure shows some revisions for the Injected Cooper conversions with the addition of the 80bhp Kit, the Super Kit and a 1400cc Injection Conversion.

The 80bhp Kit was similar to the 'Si' Plus Kit but developed 80bhp at 6000rpm, torque was 86lb/ft at 4200rpm and 0-60 was 9.86 seconds

The Super Kit was essentially the engine conversion from the 'Grand Prix' Limited Editon Mini Cooper.

The 1400cc injection Kit had twin throttle body injectors with fuel an engine management being supplied via Webber Alpha incorporating Coopers own engine management control system (ECMS). This new system was placed under the drivers seat for "safety and ease of servicing"
The power was lifted to 108bhp and the 0-60 time came down to 8 seconds.

[R1minimagic]

What about the MPI Si Cooper Sport spec?

[The_Mistro]

doesnt say anything about it on the site i got that from! after 1995 i suppose would of been the last of the SPIs and there after the MPIs though?

[kitroxin]

How rare are these?

Are they worth much more than standard coopers?

I have the #0047 'Si' =)

[shellspeed]

80bhp at 6000rpm *cough*

[Dan]

They aren't Rover products, they are John Cooper Garages conversions and as such are just the same as any other dealer conversion. The only difference due to it being made by John Cooper, which is way out of date now, was that John Cooper conversions were covered by the Rover warranty (except for any 5 speed gearboxes fitted). Rarity is tricky to define, any dealer conversion (and there were a lot available near the end of production) was produced in smaller numbers than standard cars but they tend to be kept mint and looked after so a greater proportion of them will survive. The JCG packs were not limited editions, it has a production number but so does any car. Any number of people could give JCG the money and have a conversion made, there was no limit. The various special limited edition JCG cars are different and very much rare and valuable, cars like the Grand Prix for example.

As for value, to a Mini specialist or collector they have an increased value over a standard car but in terms of a book price or insurance value they would only be worth the same as the car that the conversion is based on. If you have such a car you really must have agreed value insurance.

[fraggle_cooper]

so not that much difference then,
only light engine mods,
was just curious!

[R1minimagic]

Still doesn't answer the question though, I thought the later ones were 90bhp?

[R1minimagic]

Found it!

http://www.classicmi...ID_3801438.html

[pop]

hey i have a si mini and yes they mines fitted with a 90bhp engine and i got the recites from cooper with it

[rwiddi]

i have one and the hp is 85. i cant see anything about a change of head but it diff rockers and the decas on the side, and si badge on back. i have the original list of add ons in receipt form and most of it is decorative rather than power. and is blooming good fun!!

[Shep76S]

Strange, I though they all had a replacement head. Usually painted blue with it's head number stamped on the front left corner.
Mine was '85BHP' No 76 S
The 90 BHP was the works kit.

i have one and the hp is 85. i cant see anything about a change of head but it diff rockers and the decas on the side, and si badge on back. i have the original list of add ons in receipt form and most of it is decorative rather than power. and is blooming good fun!!

Edited by Shep76S, 18 November 2012 - 05:15 PM.

[rwiddi]

thats some awesome info.. where did you find this out?