22 replies to this topic

[liirge]

Wow thats a fantastic little engine, i would very much appreciate it, if you could find some more information!

[Sherlock]

Wow thats a fantastic little engine, i would very much appreciate it, if you could find some more information!

Will do! Watch this space, I shall probably have to go & see the engineer who does all my machining, but I could do with finding out more details for myself, so I may as well do so sooner rather than later. I agree with you a fantastic little engine, & much as I like the classic 1275 'S' there's just that bit more of a sense of achievement to get real power from a small block & they feel somehow that bit smoother & more nimble even though you might miss out on the brute power & torque of the big block motor. (Seem to be taking over young Page's thread here, sorry mate!)

[bmcecosse]

You are NOT going to get reliable 100 bhp from a 1098 engine. It's a good steady slogger - but not a high power engine. Anything over ~ 70 bhp will make it very fragile!

[liirge]

Wow thats a fantastic little engine, i would very much appreciate it, if you could find some more information!

Will do! Watch this space, I shall probably have to go & see the engineer who does all my machining, but I could do with finding out more details for myself, so I may as well do so sooner rather than later. I agree with you a fantastic little engine, & much as I like the classic 1275 'S' there's just that bit more of a sense of achievement to get real power from a small block & they feel somehow that bit smoother & more nimble even though you might miss out on the brute power & torque of the big block motor. (Seem to be taking over young Page's thread here, sorry mate!)

100% agree with all the points you have made there, especially about the sense of Achievement, i look forward to hearing from you about this Engine spec.

[minimanpage]

Wow thats a fantastic little engine, i would very much appreciate it, if you could find some more information!

Will do! Watch this space, I shall probably have to go & see the engineer who does all my machining, but I could do with finding out more details for myself, so I may as well do so sooner rather than later. I agree with you a fantastic little engine, & much as I like the classic 1275 'S' there's just that bit more of a sense of achievement to get real power from a small block & they feel somehow that bit smoother & more nimble even though you might miss out on the brute power & torque of the big block motor. (Seem to be taking over young Page's thread here, sorry mate!)

100% agree with all the points you have made there, especially about the sense of Achievement, i look forward to hearing from you about this Engine spec.

hey mate its fine
im learning dude keep going
im thinking 1275, but which a series fits a MK2 cooper s gearbox if any?

[Cooperman]

Wow thats a fantastic little engine, i would very much appreciate it, if you could find some more information!

Will do! Watch this space, I shall probably have to go & see the engineer who does all my machining, but I could do with finding out more details for myself, so I may as well do so sooner rather than later. I agree with you a fantastic little engine, & much as I like the classic 1275 'S' there's just that bit more of a sense of achievement to get real power from a small block & they feel somehow that bit smoother & more nimble even though you might miss out on the brute power & torque of the big block motor. (Seem to be taking over young Page's thread here, sorry mate!)

100% agree with all the points you have made there, especially about the sense of Achievement, i look forward to hearing from you about this Engine spec.

hey mate its fine
im learning dude keep going
im thinking 1275, but which a series fits a MK2 cooper s gearbox if any?

So long as it's a 4-syncro box all the 1275 engines will fit. With the earlier 3-syncro Cooper box there can be an issue with the rods hitting the sides of the box. However, even that can be overcome with a bit of machining.
PM me if you want a really good 1275 as I'm just doing a short engine rfebuild at a sensible price and the final spec is still open for discussion (cam, head, etc).

[Sherlock]

Wow thats a fantastic little engine, i would very much appreciate it, if you could find some more information!

I have come up with some more information on the Speedwell 1152, obviously most of this comes from the memories of guys who are not as young as they would like, in fact I was still at school when I first read about this engine.
997 Cooper block bored +060" making the bores 2.64" (67.1mm)
997 Cooper crankshaft, stroke: 3.2" (81.3mm)
Cast alloy cylinder head, based on the 12G295 with superior port & chamber designs.
Compression ratio 10.5:1 or 11:1 depending on use.
Inlet valves 1.25" (31.75mm) Diameter.
Exhaust Valves 1.00" (25.4mm) Diameter.
High lift rocker arms, thought to be 1.5:1.
Camshaft? the details seem to have disappeared, but my associate who has been involved with racing A series engines for well over 40 years remembers it as being very close to the old BMC Competitions Dept, '649'.
Carbs: Twin 1.5" SU's.
The internals of the engine were, where necessary, polished, lightened & very finely balanced.
If I can enlarge on this, I'll post any more that I find.

 Speedwell_1152.jpg   99.01K   31 downloads

Picture dedicated to the memory of the late Clive Trickey, I pinched it from his book which I bought in 1968 & still use today. I'm sure he'd approve of it being used in this context.

Thanks Page, as you say, there's always things to learn about Minis & most of it's interesting & fun

[Gr4h4m]

turbo, or supercharge it 7-10psi and you will hit 100 bhp at the fly.