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Home > Show Us Yours! > k1200rs 1380 engine build

philc

1394 Posts
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bromsgrove

spent the morning on the bridgeport, opening the stud holes on the head to 12mm, so i no longer have to hit it with a hammer :icon_biggrin:, however what appeared to be a logical way :idea1: of firstly lining up the head to the block by using locating dowels did not work, they were some way off :crybaby2:, this was done on the cnc machine, everything was dialed up, so i can only sumise that despite having the stud holes drilled and tapped on a cnc machine this still was not accurate due to drilling and tapping into drifferent types of material :icon_thumright:. I am just concerned about the cam belt slipping due the head not been true of even moving.
i suspect as Colin states the ideal is to drill and tap into the same material rather than softer and harder as the drill and tap will naturally move to the softer side :icon_thumleft:. I suspect the is the only way to be sure is to re drill the stud holes on the block using bigger blanking studs, that way i will be able to drill and tap into the same material, therefore avoiding any movement in the drill and tap. :laughing7:
However someone has suggested putting a small sleeve in the bolt holes on the head to stop any movement :icon_scratch:, something like this http://www.engineersedge.com/roll_pin.htm, that said I have 10 studs each with around 45lb = 450lb spread over the head, therefore it should not go any where. :icon_silent:


philc

1394 Posts
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bromsgrove

conrods shot peened yesterday nice and shiney

[img width=800 height=600]http://i201.photobucket.com/albums/aa225/philc72/Twinky/26022011088.jpg[/img]


apbellamy

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16540 Posts
Member #: 4241
King Gaycharger, butt plug dealer, Sheldon Cooper and a BAC but generally a niceish fella if you dont mind a northerner

Rotherham, South Yorkshire

On 11th Feb, 2015 robert said:
i tried putting soap on it , and heating it to brown , then slathered my new lube on it

*hehe!*


John

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10020 Posts
Member #: 1456
Mongo

Barnsley, South Flatcapshire

Looking good. Where did you get the peening done? And how much?

If something is worth doing, it's worth doing half of.


Miniwilliams

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5329 Posts
Member #: 140
Proven 200+bhp & Avon Park 05,06,07 Class D 3rd place

Hell you have put some work into this, really top job.

Best 1/4 mile 13.2 seconds @116 mph
First 5 port miniturbo to make over 200 bhp on a carb?
First 5 port miniturbo to make over 200 bhp on Injection?

http://www.mattwoodsphotography.com


philc

1394 Posts
Member #: 1346
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bromsgrove



On 26th Feb, 2011 John said:
Looking good. Where did you get the peening done? And how much?

£3.50 per rod, redditch shotblasting



On 26th Feb, 2011 Miniwilliams said:
Hell you have put some work into this, really top job.


thanks, it's just time consuming as i can only access the workshop for a couple of hours, but getting there

Edited by philc on 27th Feb, 2011.


apbellamy

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16540 Posts
Member #: 4241
King Gaycharger, butt plug dealer, Sheldon Cooper and a BAC but generally a niceish fella if you dont mind a northerner

Rotherham, South Yorkshire

I was in two minds about having it done, but if the cost is that low...

On 11th Feb, 2015 robert said:
i tried putting soap on it , and heating it to brown , then slathered my new lube on it

*hehe!*


philc

1394 Posts
Member #: 1346
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bromsgrove




On 27th Feb, 2011 apbellamy said:
I was in two minds about having it done, but if the cost is that low...


i thought it was going to be loads, but couldn't argue with £14, i will be thinking of having the block shotblasted next.


philc

1394 Posts
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bromsgrove

Crank nitrided and now in for grinding




philc

1394 Posts
Member #: 1346
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bromsgrove

Had the block and head back, with two keyways inserted in the bloc and matched to the head, with the intention of stopping any twist in the head, thus avoiding the belt to slip off.


For me this has been a learning curve, in that the only way to avoid any slipping when drilling and tapping for the head studs would have been to put bigger plugs in and drill and tap into these, thus avoiding any drill and tap slippage and the only way in my view is to have access to a cnc machine


philc

1394 Posts
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bromsgrove

Head has had its final skim today

Pistons are in for the dummy build, mark the pistons for cutting

Head gasket and head on for the first time.



philc

1394 Posts
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bromsgrove

Very slow progress now as I have not been able to get to the machine shop, but I have done a dummy build for the cuts in the pistons and have made a jig


Correct me if I am wrong but the valves are at 70 degrees?


old55

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done most of that but a bit different for rwd.
http://i1202.photobucket.com/albums/bb376/...ingermog009.jpg

not to old to dream


Sprocket

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Preston On The Brook




On 1st May, 2011 philc said:

Correct me if I am wrong but the valves are at 70 degrees?


Depends on what plain you are measuring it from.

Actual valve angle is an included angle of 19.5 and 20.5 degrees, but for the sake of simplicity 20 degrees is perfectly fine

On 26th Oct, 2004 TurboDave16v said:
Is it A-Series only? I think it should be...
So when some joey comes on here about how his 16v turbo vauxhall is great compared to ours, he can be given the 'bird'...


On 26th Oct, 2004 Tom Fenton said:
Yep I agree with TD........


philc

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bromsgrove

Cut outs for the oil jets

Cut outs for the valves



apbellamy

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16540 Posts
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King Gaycharger, butt plug dealer, Sheldon Cooper and a BAC but generally a niceish fella if you dont mind a northerner

Rotherham, South Yorkshire

Do you need the cut outs for the oil jets? Not seen anybody else doing that before. Has it put the pistons out of balance?

EDIT: Made my question more clear...

Edited by apbellamy on 16th Jun, 2011.

On 11th Feb, 2015 robert said:
i tried putting soap on it , and heating it to brown , then slathered my new lube on it

*hehe!*


Turbo Phil

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4621 Posts
Member #: 20
My sister is so fit I won't show anyone her picture

Lake District

My mate Mike did it to his pistons, so even if the cambelt snapped there would be no contact.

WWW.TURBO-MINI.COM


John

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10020 Posts
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Mongo

Barnsley, South Flatcapshire

I think Andy is on about the cut-outs for the oil jets.

If something is worth doing, it's worth doing half of.


apbellamy

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16540 Posts
Member #: 4241
King Gaycharger, butt plug dealer, Sheldon Cooper and a BAC but generally a niceish fella if you dont mind a northerner

Rotherham, South Yorkshire

yep

On 11th Feb, 2015 robert said:
i tried putting soap on it , and heating it to brown , then slathered my new lube on it

*hehe!*


Turbo Phil

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4621 Posts
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My sister is so fit I won't show anyone her picture

Lake District

Ahhh ! Silly me ..... :)

WWW.TURBO-MINI.COM


John

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10020 Posts
Member #: 1456
Mongo

Barnsley, South Flatcapshire

I've seen posts on here where people have had to file pisons for the jets.

If something is worth doing, it's worth doing half of.


philc

1394 Posts
Member #: 1346
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bromsgrove




On 16th Jun, 2011 apbellamy said:
Do you need the cut outs for the oil jets? Not seen anybody else doing that before. Has it put the pistons out of balance?

EDIT: Made my question more clear...


i found the bottom of the pistons were coming into contact with the jets, so it was suggested that i do the cuts. perhaps there is an argumentto suggest i did not need to cut out so much.
in respect of the balance this is something that i am checking next.


minimole23

4303 Posts
Member #: 1321
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Wiltshire

You could always take the same notch out but on the opposing side8-)

On 7th Oct, 2010 5haneJ said:
yeah I gave it all a good prodding


John

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10020 Posts
Member #: 1456
Mongo

Barnsley, South Flatcapshire

Thats not a bad idea actually. Unless it could affect the piston strenth in anyway?


On 16th Jun, 2011 minimole23 said:
You could always take the same notch out but on the opposing side8-)

Edited by John on 16th Jun, 2011.

If something is worth doing, it's worth doing half of.


wil_h

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Betwix Harrogate and York

I don't know why a piston would need to be balanced. It does not rotate, just goes up and down.

In 998s the gudgeon pin is not even central, so what would you balance?

Looking good though.

Fastest 998 mini in the world? 13.05 1/4 mile 106mph

www.twin-turbo.co.uk

On 2nd Jan, 2013 fastcarl said:

the design shows a distinct lack of imagination,
talk about starting off with a clean sheet of paper, then not bothering to fucking draw on it,lol

On 20th Apr, 2012 Paul S said:
I'm mainly concerned about swirl in the runners caused by the tangential entry.

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