Supercharged K1293 - Target 200+ BHP
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where are you proposing the propa place be?

id be happy with that crank personally

Check out the cranks here sprocket. The guy does know his stuff

http://www.shengineering.co.uk/sh/content/mini-crankshafts

That may be the case but it doesnt mean it is right. Trying to disprove my comments by saying "the guy knows his stuff" does not change the fact that some oil holes are in the wrong place reducing the load carrying ability in a high load region. Same can be said about MED modified cranks, or at least the one I had.

perhaps an example is in order to show the correct placement away from this high load regin?

i think the torsional stress (crank flex) is of more concern on our 3 main cranks than the position of an oil hole as if the shell and journal are not 100% parallel then what good is a "correctly orientated hole" about as good as a cheep hooker?

dont you think if the crank under such stress that the oil hole location has an effect that the cylender pressure is at the point there is sugnifcant torsnals in the crank that make the contact/oil film not as it should be for ideal load shearing??

not trying to put blood in the piranha fish tank here just dont think its that cirtcal that the oil hole be drilled at X angle to witch the cylender pressure is lowest i think there is much more to be worried about with such high cylender pressures that the crank twists and the parall oil clearnace is not such and grabs an edge of the shell rather than the oil film being over come

perhaps some one can say what oil clearances they run and how much ft/lbs or cylinder pressure its makeing and where the oil holes are

what im getting at is real world vs math/predictions we see so meanny gear box falures bit not meany bearings that grab or fuck out? surely its not to critcal where the oil hole is we melt pistons before bearings so dose it matter?
weakest link first

You may take what i said as 'opinion' but in doing so, you then suggest the published reaserch as opinion too? I suppose that could be wrong too.

Interesting conversation here guys. Seems there's pros and cons to the extra drilling, although it has reduced the surface area of the journal by (at a guess) 25% at the 90* angle mid stroke. Does it give extra oil where needed or just act as a oil pressure relief. It all depends on the pressure within the big end when on the power or compression stroke and whether the oil pump can over come it. In my 'opinion' lol, I expect the big end bearings won't last as long as with a factory style crank, but then it is going in a toy, will it matter? Naaaa

Finally a pic from a pal doing the machining on my block. Wont be long until its home :)

Edited by Vegard on 3rd Feb, 2015.

The heads back from the welders. Wont be long now

This Project has been sat in my mates work-shop for the past 2 years. Is anybody interested in buying the parts and carrying it on? Let me know and if there's any interest I'll list all of the parts I have :)

Wayne

I have a friend building a K head A series at an early stage. What you got ?.

The head still looks like that and still needs machining, the engine still needs machining too I think, I have the specialist components kit with the top plate switched for a supercharged version, the specialist components ancilliary kit, Injectors/carbs whatever there called. The cams, vales, cover etc (Cover needs machining) might have other stuff too but I'll have to take a look. I do have someone on first refusal on these parts who has already been in touch but yeah if your mate is interested tell him to get in touch

Decided to keep the project and soldier on with it :)

Good job

Drives
-Ford S-max Mk2 Ecoboost
-Rover 100 VVC #2 - track project

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