17 replies to this topic

[adder501]

Hi,

I have just started building a 1330 Specialist Components twin cam conversion.

Follow the build and detailed updates on my blog - www.twincammini.com

The blog is a work in progress also so it will improve.

Cheers

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 AdobePhotoshopExpress_20120930215153.jpg   67.23K   27 downloads

Edited by adder501, 07 October 2012 - 10:05 PM.

[DeadBert]

Excellent. I'm doing this conversion early next year so thanks for sharing the information! Will look forward to following your progress.

Chris

[oltonlad]

nice conversion, but a 1275 +60 is a 1330 not 1340

[adder501]

Ill get that adjusted for you.

Thanks

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[wolfie]

Less than 500kgs i doubt that!
Work on the engine looks good.

[adder501]

Cheers Wolfie should be 650kgs

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[freaker]

are you selling the drill template after your finished with it ?

freaker

[adder501]

Hi freaker,

I don't think I will be right away as this will be used again for a 16valver. Or depending how this one goes it could be onto building another 8 valver for our other mini.

Parts have been delivered to radtec hopefully the head will be done by Friday. The block could be away slightly longer perhaps ready for collection start of next week.

Cheers Ad

[In-a-mini]

Looking good hows it going? are your pistond flat tops?

[Sam Walters]

Do not drill those stud holes on a piller drill or using that template. Not if you want them to be straight or anywhere near the right position.

Get it done on a mill with at least a DRO.

76mm side to side clocked off the front three stud holes and 86 front to back.

[adder501]

Hi Sam,

Thanks for highlighting these figures. The block will be modified using a miller and clocking has been discussed with the machine shop.

The recent Lack of updates are due to travelling with work and now a holiday away. Im planning on ordering the conversion kit when I return. And start looking for a decent crank pulley.

Pistons are dished in this engine build.

Thanks

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[In-a-mini]

Ah ok just wondered if dished pistons would give a high enough cr with the chamber size of the 8v head.

[adder501]

Hi "in-a-mini" sorry for a late reply.

With this project I'm following the basic design that SC used in their first 1293 twin cam engine. This was fitted into the White SC clubman estate. This engine produced around 105-110hp with a CR of around 10.4:1 using 95RON fuel. The AE slipper pistons that are being used have an 8.3cc central dish. Pockets will have to be cut into the pistons but i'm unsure of the actual cc of these so i'm leaving it for SC to do. The 8 valve head has around 23cc chamber size in standard form. With the alloy welding that has been done to the head, i will have to take some material off the face to confirm it's flat, so this 23cc will decrease slightly. The SC head gasket that will be used is 0.6mm giving 2.85cc. The block has been decked and we're using a standard stroking crank and +060" pistons.

I will be calling John at SC tomorrow just to confirm my calculations but i'm hoping of around the 10.5:1 figure.

Blog has been updated with more pictures tonight incase people want to have a look.

Thanks

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[adder501]

Just an update to say the blog has been updated today. Parts have arrived!

Cheers

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[mini_nutz]

Good luck with your build.

Have you seen my SC K1380rs build on TMF?

Warren