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My SC 1293 Project..
https://www.ausmini.com/forums/viewtopic.php?f=5&t=84597		 Page 1 of 1
Author:  Speedwell Racer [ Sat Feb 15, 2014 2:18 pm ]
Post subject:  My SC 1293 Project..
Hey guys,

Thought i better start a thread on my engine build as its starting to progress a bit. :shock:
I picked up what is believed to be a stock 1275LS engine from Melbourne thanks to josh at mini imports.
My plan was to build a hot 1330 but when an SC12 supercharger popped up i couldnt resist.
So my plans are as follows,
Sc12 and kit from (92) on here!
Hif44 carby
Bored to 1293 (GR Pistons)
All new rings, bearings and gaskets
High flow head by Daniel willson
Super light flywheel and orange dot clutch
Wade 240 cam although open to other options. wanting a lumpy idle :evil:
Swiftune or minispares SCCR gearbox and x pin diff
Forged 1.5 rockers
not sure on a dizzy as yet any suggestions appreciated
Alloy Rad, and thermo
isky cam followers
centre oil pick up.

Any suggestions on parts is apprectiated.

Does anyone know the standard compression ratio of an LS engine?
And what it will need to have done to get compression down to run 8psi?

Im torn between two options at the moment as for the look of the car when the engine is in.
its either going to be wide wheels, flares, camber and a WRX bonnet scoop for the low FAT stance look.
Or stock wheels, hubcaps, and real granny spec roof rack and sun visor.
i reckon the granny spec look would be sweet but i love the low wide stance look aswell.

Anyway onto the pics:

What i started with
Image

Bores look good
Image

Slowly stripping
Image

Gearbox looks good
Image

Same with the bottom end
Image

Soon it will fit, but not on the 998 :twisted:
Image

I hope to keep updating this as new parts are ordered and as the rebuilding begins.

Cheers, Rhys.
Author:  simon k [ Sun Feb 16, 2014 1:16 pm ]
Post subject:  Re: My SC 1293 Project..
lumpy cams aren't the best idea for forced induction - the lumpiness is there because of overlap, overlap with boost means you're just pumping boost pressure out of the exhaust ports. I like my RE83, mine is the non boost version, but GR does one set up for boost (RE83T)

best distributor is no distributor at all

that's a large journal crank, you could get it stroked, would be lovely with the blower on it

I have GRs pistons in my motor (still on the bench), he's taken the dishes out to 13cc (I think thats what I measured it at) and I've removed the beaks from the head. The head had already had a fair bit taken off the face so cc was low. It makes my C/R about 9.3:1 which I'm happy with. I reckon 8:1 would be really hard to get down to. It'd also be really doughy to drive off boost....

I was running more like 9:8:1 with my old pistons and they survived really well considering the 30,000km of abuse I gave them. They were hypatecs, one had melted a bit from running too lean, and all of the rings had lost their tension which GR says is a problem with the hastings rings, as soon as they get too hot they go floppy.
Author:  mini_mad_matt [ Sun Feb 16, 2014 2:11 pm ]
Post subject:  Re: My SC 1293 Project..
I've built my motor to be 9:1 compression. It's a 1330 and the pistons are sitting just proud of the deck. My choices to lower the compression was to either machine the pistons, run a decompression plate and 2 gaskets or open up the cylinder head chambers. I decided to open up the chambers, which was a lot of work to go from 21cc to 30cc but i think it's the better way to go.
Author:  Speedwell Racer [ Sun Feb 16, 2014 9:18 pm ]
Post subject:  Re: My SC 1293 Project..
Ok there's been a bit of a set back.
I'm glad I haven't ordered the sc12 kit yet as it turns out the guy that had mine didn't realise it was actually an sc14.. :shock:
Partially my fault because I didn't realise at first and now have. :oops:

So unless anyone has an sc12 they want to swap for a 14 I won't be supercharging anytime soon.

Cheers, Rhys
Author:  simon k [ Sun Feb 16, 2014 9:37 pm ]
Post subject:  Re: My SC 1293 Project..
Speedwell Racer wrote:
Ok there's been a bit of a set back.
I'm glad I haven't ordered the sc12 kit yet as it turns out the guy that had mine didn't realise it was actually an sc14.. :shock:
Partially my fault because I didn't realise at first and now have. :oops:

So unless anyone has an sc12 they want to swap for a 14 I won't be supercharging anytime soon.

Cheers, Rhys


I was wondering about that - looked a bit too big but I thought maybe it was just the photo
Author:  Speedwell Racer [ Tue Feb 18, 2014 9:12 pm ]
Post subject:  Re: My SC 1293 Project..
No problems.
All back on track.
Sc14 sold within 20 minutes of advertising it. Being picked up tomorrow.
And already got my hands on a full sc12 kit and sc12 minus the engine steady.

So I will need an engine steady to suit the sc12.
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