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TheMiniMan
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PostPosted: Sun Mar 03, 2013 8:24 am 
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Hey Steve, Lookin "REAL" nice there,,, slowly but surely hey??? & getting it all just right,,, keep on that path & you`1ll be fine :-)

& Smartys a 16v K1200 with the magnesium cover, spiffy hey? :-)
(i have one of those too) :-)

lumpy cams are easy to do with these things,,, swing them up (dial them in) with more overlap & hey presto "more lumpy"

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No offence intended here but--> anyone writing a book about minis 30 years ago may not have experienced such worn or stuffed-with components as we are finding these days.

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Smarty
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PostPosted: Sun Mar 03, 2013 8:53 am 
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Yep sure is a 16V k1200RS.

Cant remember the numbers of the filters, but will go and have a look, have it written down somewhere.....
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Kennomini
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PostPosted: Sun Mar 03, 2013 11:58 am 
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Smarty wrote:
Will probably sound just like mine....
http://www.youtube.com/watch?v=1Xp9kXKR8Hs

8)

You really need to change the title on that vid, anyone searching for bmw head minis would never find it.
Apart from that it's a nice engine.

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braad
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PostPosted: Mon Mar 04, 2013 3:30 pm 
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dalmeny wrote:
BACK ON TRACK!!! :lol:

As stated above, off to GR's this morning for an expert measure up (CC'ing the head and pistons).

As expected I wasn't too far out with my mearsuring. I thought I needed to find another 8cc, which I thought I could get with 3mm H/G, in copper. But, after talking to MattR and Graham, the proper way to do it was dish the pistons.

Graham did some calculations on the first piston, machined it and refitted it for another measure. The total including dish, fly cuts and deck height gave us 10cc's. Head CC 19cc's (a long way from the standard 28cc's hey Matt) and 4cc's for the H/G.

Giving me the desired C/R of 11.4:1

GR machining one of the dishes.
Image

And the difference between the before and after.
Image

And, out of there by lunch time with it assembled. A huge thank you to Graham, whom I'm sure could have been doing something else on a Saturday morning.

Hope those flash new special head gaskets aren't far away :roll:


Thats so prettttty!!

Excellent work mate. GR sounds like a pretty good bloke knocking those pistons down on a saturday for you

Smarty wrote:
Will probably sound just like mine....
http://www.youtube.com/watch?v=1Xp9kXKR8Hs

8)


That sounds great!

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dalmeny
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PostPosted: Sat Mar 23, 2013 7:26 pm 
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More bits have arrived and ready for the dry build.

theminiman's twin cam mini headgasket. Looking like a BK450, but with the right holes.

Image

MED Ultra light steel flywheel, AP racing clutch and comp cover. Assembled and balanced. With a Hi-Torque pre-engaged starter.

Image
Image

The dry build went along fine until I couldn't get the pre tune timing set as per Matt's build guide. So an out of business hours call to Matt to find out where I was going wrong. Right here, I apologize to Matt for interupting his weekend. It turned out the inlet and exhaust cams had managed to exchange places. I hope it was me and not the head reconditioner :? .

With the start up timing, set as per the build guide, everything clears, providing the timing belt never breaks :roll:

Image

Image

Image


Once this lot put on a few more kilo's I'll have my engine mangement set up.

Image

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NG
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PostPosted: Sun Mar 24, 2013 2:19 am 
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wow how good does matts gasket look! like factory! im sure they will be snapped up.

that engine looks great man :)
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IndigoBlueCooperS
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PostPosted: Sun Mar 24, 2013 8:39 am 
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998cc
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Dalmeny,
I have the same MED flywheels in the Twini. Purchased about a year ago.
Checked them out and found the diaphragm springs did not sit flat when assembled.
The following link explains this:
http://www.minimania.com/classic-mini-c ... cfm?id=153.
Matt would give some advice on the need or otherwise for this.
I need to take about 1.5mm from the backing plate posts to make the spring flat. I would be interested to see if yours is the same. Not sure if this is needed to allow for some clutch plate wear.
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zulu_warrior1976
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PostPosted: Sun Mar 24, 2013 9:17 am 
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Sexy engine

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dalmeny
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PostPosted: Sun Mar 24, 2013 4:03 pm 
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Indigo

I'll do some checking. It is assembled, as in bolted together, I don't know if you can see the spring sitting flat like that. GR might have an answer as well he said he has used the MED flywheel.

I have printed up the minimania stuff I'll have a read.

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ken@miniauto
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PostPosted: Sun Mar 24, 2013 4:48 pm 
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Have had the same problem with all the MED (and others) that I have used
Varies fom 1 to 1.5 mm needed off the legs
Also check that the stepped bolts dont bottom out after machining the legs
kjn
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IndigoBlueCooperS
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PostPosted: Sun Mar 24, 2013 6:07 pm 
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998cc
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KJN,
Do you machine the legs, so that the spring is flat with a new clutch plate?
What happens when the clutch plate wears a bit.

Dalmeny, have a chat to Kevin the Dr, as he has commented on this in the past.
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ken@miniauto
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PostPosted: Mon Mar 25, 2013 7:28 am 
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I machine the legs so the spring is flat with a new clutch plate
As the plate wears the clamp pressure becomes slightly less
Doesnt seem to be a problem even in our race engines
kjn
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drmini in aust
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PostPosted: Mon Mar 25, 2013 9:03 am 
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ken@miniauto wrote:
I machine the legs so the spring is flat with a new clutch plate
As the plate wears the clamp pressure becomes slightly less
Doesnt seem to be a problem even in our race engines
kjn

I do the same as Ken does (but when machining s/h flywheels and backplates).
Max pressure is achieved with the spring flat when assembled.

It's strange though that they need this much taken off with NEW parts, someone at MED has obviously stuffed up the dimensions. :roll:

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FNQ
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PostPosted: Mon Mar 25, 2013 9:15 pm 
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Dalmeny

the herefords(mums?) at the back look like they have more than enough condition

place looking good after rain.

Again nooby question - i understand taking meat out of top piston to change cc. - in the photo are they scalloped? please assist me in the understanding of their design

cheers Darryl
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dalmeny
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PostPosted: Mon Mar 25, 2013 9:31 pm 
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FNQ wrote:
Dalmeny

the herefords(mums?) at the back look like they have more than enough condition

Mums stay for next year


place looking good after rain.

Should be a good winter.

Again nooby question - i understand taking meat out of top piston to change cc. - in the photo are they scalloped? please assist me in the understanding of their design

Yeah, I thought the dish would be concave. GR's cutting tool has a round end and the dish is actually flat and after a few cuts that round cutter leaves a curved edge around the outer edge of the dish. Like the cornise on your ceiling at home. You would have to ask someone more knowledgable than me about SQWISH

cheers Darryl

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