9 replies to this topic

[Chris.Williams]

Hi all, picked up the above a couple of weeks ago, what can Anyone tell me about these motors, seems to be a 1275 but with a 1098 engine number, I’ve read bits and pieces about short stroke this and that, hoping for a bit more insight.
Cheers
Chris

[Vinay-RS]

Hey Chris, congrats on the purchase! Could you post a pic of the engine? Also does it have a riveted or stamped engine number? This would determine whether it is a 1098 Clubman, a GTS (1275) or a 1275 E. Also the engine bay and engine number would make it clearer to identify the model. A lot of local Minis (especially 1098s) had their engines swapped because you can't get pistons/rings for those engines (I believe). 

 

Specs:
1098:
Bore: 70.64 mm

Stroke: 69.85 mm

Compression ratio: 8.0:1

 

1275 (GTS):

Bore: 70.64 mm

Stroke: 81.28 mm

Compression ratio: 9.75:1

 

1275 (E):

Bore: 70.64 mm

Stroke: 81.30 mm

Compression ratio: 9.4:1

 

That's the tech specs from a local data source (Ryno Verster's A South African Mini Story). 

 

Hope that helps :) 

[Chris.Williams]

Hey Vinay, thanks for your kind words.
I have these pictures
Engine number starts 10h702e
 365C7662-0748-4702-867D-9DFAE6E63697.jpeg   131.22K   1 downloads
 62727E61-A079-475F-9776-49095B697CC4.jpeg   120.32K   1 downloads

[timmy850]

If it's the 1098 short stroke crank (unique to the South African cars) you can modify the engine to be a 1071 Cooper S style screamer. In factory spec though they had giant top pistons to make up for the shorter stroke

 

You'll need to add some longer 6" rods OR cut the top of the block down 1/4" to work with the usual 1275 pistons & use some small bore pushrods. They are a popular engine over on the mk1-forum

 

I'm lucky enough to have an SA1100 crank for my next engine project thanks to Jared 

[Vinay-RS]

Yup! That's a 1098 engine number and what looks like a Clubman chassis number. Not sure if the engine was that colour though from the factory.  

[Chris.Williams]

So is this thing worth my time to get back on the road you think?

[Vinay-RS]

Assuming the engine is fine, it would be nice to put it right. Those engines are really smooth. They were the most sold Minis locally (they sold around 10000 of them), but many have been used for stock car racing/chopped up/rusted away, and there aren't that many tidy examples even locally. 

[Chris.Williams]

Here are the pictures I have so far
 56A9A37E-4BA1-4C39-84AA-4F104B8CB59D.jpeg   58.97K   1 downloads
 09F1931B-7D2D-41E6-8A19-8578C1D80D50.jpeg   59.8K   2 downloads
 75F017CB-CBBA-459B-94F7-02909FB83A89.jpeg   60.92K   2 downloads
 514A34F6-8B16-429F-86AB-68D11D1B09C1.jpeg   56.7K   1 downloads
 EDDD2256-7C06-4C44-BBE0-257E7C7E6543.jpeg   103.1K   1 downloads
 390C0913-D019-4AC6-A158-6696CCFC27F1.jpeg   74.2K   2 downloads

[Vinay-RS]

Those front seats look original and the shell looks really solid too. 

[Chris.Williams]

Yeah, couple of pinholes in the passenger sill, some of the body filler is looking tired.
Will strip all that off and redo what’s needed. Prime, paint and reassemble.