My K100 Build
Turbo Mini Forums

Picked up my 850 crank frm MED this morning.

Wedged, re-ground, nitro-carbusrised etc.



Only took them 3 weeks and it looks good workmanship, so I've given them the con-rods to lighten etc.

Saul Bellow - "A great deal of intelligence can be invested in ignorance when the need for illusion is deep."
Stephen Hawking - "The greatest enemy of knowledge is not ignorance, it is the illusion of knowledge."

ill be using MED i think

although i am not in any rush have not even stripped this yet
[/quote]

go on then , how much did they relieve you in £££ for that . was it exchange.

carl

WWW.FORCE-RACING.CO.UK PLEASE CLICK HERE

Saul Bellow - "A great deal of intelligence can be invested in ignorance when the need for illusion is deep."
Stephen Hawking - "The greatest enemy of knowledge is not ignorance, it is the illusion of knowledge."

Wolfie,,, i just love that pic Now that should be the opening page pic for a Bimmer Twinky forum for sure

Maybe would be better pic with it stuffed into the back of a mini van but still, dam good

Edited by MadMatt on 25th Jan, 2008.

www.miniman.com.au

"""LazyGoodForNothingSmartArseKnowItAllBackYardMiniMechanic"""

lol,

it looks abit like the lights still on on the bike.

Theres a guy who works for us who owns one of those bikes, i might nick it!

1/4 Mile 14.3secs 96Mph Terminal 10psi of boost.


Fibreglass Parts? - http://www.tdkracing.co.uk/
Split Rims? - http://www.force-racing.co.uk/

How did you find Meds customer service, when trying to ask questions etc?

Saul Bellow - "A great deal of intelligence can be invested in ignorance when the need for illusion is deep."
Stephen Hawking - "The greatest enemy of knowledge is not ignorance, it is the illusion of knowledge."

I measured the combustion chambers this afternoon on the K100 8v head.

They came out at 21cc.

That's good news as I only have to take 2.5mm of the block deck to get 10:1 with the 0.6mm gasket. If I change the gasket to the 1.6mm one, I then get 9:1, so easy to try diffrent CRs.

Also no valve pockets if I re-profile the cams.

Edited by Paul S on 7th Feb, 2008.

Saul Bellow - "A great deal of intelligence can be invested in ignorance when the need for illusion is deep."
Stephen Hawking - "The greatest enemy of knowledge is not ignorance, it is the illusion of knowledge."

so you are keeping it NA for now?

what are you looking to reprofile the cams to?

Edited by miniboo on 9th Feb, 2008.

NA to start with, then turbo.

I'm going get Piper to reprofile the cams to around 260 degrees duration and set them at 110-112 degrees LSA.

Saul Bellow - "A great deal of intelligence can be invested in ignorance when the need for illusion is deep."
Stephen Hawking - "The greatest enemy of knowledge is not ignorance, it is the illusion of knowledge."

i take it that is still enough oomph for NA?

just thinking about my build and whether it could be worth me doing it aswell

Depends what you are aiming for.

I'm looking for 60mpg.

Saul Bellow - "A great deal of intelligence can be invested in ignorance when the need for illusion is deep."
Stephen Hawking - "The greatest enemy of knowledge is not ignorance, it is the illusion of knowledge."

well i will be using mine as a cruiser so maybe i should look into it more.

60 mpg is what i was thinking about aswell after reading your thread!!

Latest aquisition:



Lightened, balanced and shot-peened rods. Hopefully good for 8000rpm.

Feels like a cheque book build at the moment.

Saul Bellow - "A great deal of intelligence can be invested in ignorance when the need for illusion is deep."
Stephen Hawking - "The greatest enemy of knowledge is not ignorance, it is the illusion of knowledge."

where did they come from?

Saul Bellow - "A great deal of intelligence can be invested in ignorance when the need for illusion is deep."
Stephen Hawking - "The greatest enemy of knowledge is not ignorance, it is the illusion of knowledge."

Pistons from Minisport Aus:



They are 998 +0.120", so a lot bigger than the standard piston. The piston and pin weigh around 300 gram which is OK considering the size. About 25 gram heavier than the original P20950.

They have 9.5mm from the top down to the first ring which is supposed to be beneficial for a turbo application.

This is a comparison with standard pistons.

Edited by Paul S on 25th Mar, 2008.

Saul Bellow - "A great deal of intelligence can be invested in ignorance when the need for illusion is deep."
Stephen Hawking - "The greatest enemy of knowledge is not ignorance, it is the illusion of knowledge."

That looks pretty good!
Can we have a piccie of the underside?

Underside:



I was worried that they may have made them larger on the outside and kept the standard inside dimensions which would have made a heavy piston. However the skirts are same thickness as standard.

Saul Bellow - "A great deal of intelligence can be invested in ignorance when the need for illusion is deep."
Stephen Hawking - "The greatest enemy of knowledge is not ignorance, it is the illusion of knowledge."

nice! but whats the pistons in the background?

Saul Bellow - "A great deal of intelligence can be invested in ignorance when the need for illusion is deep."
Stephen Hawking - "The greatest enemy of knowledge is not ignorance, it is the illusion of knowledge."

Started the dry decking today.

Milled a couple of millimeters off the deck to start with. It will need a bit more to get the deck height right for the 850 crank and 10:1 compression.



Left the engine number boss at normal height for reference purposes.

Had to turn it round to mill the whole length. Working at the limits of my Chester lathe/mill here.



I can just get colletts and cutters in and out without moving the head or workpiece, so using the SC template should be a doddle. That is once I've relocated the 3 studs that normally stay in place.

Opened up the push rod holes ready for tapping 3/8" BSPT.



Using these taper threaded iron plugs to block the holes.

Edited by Paul S on 21st Apr, 2008.

Saul Bellow - "A great deal of intelligence can be invested in ignorance when the need for illusion is deep."
Stephen Hawking - "The greatest enemy of knowledge is not ignorance, it is the illusion of knowledge."

Cool, where did you get the plugs from? also I assume that you're going to get a machine shop to do a final pass on the block with a fly cutter.