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Home > Show Us Yours! > Mini Special Deluxe 1975 - 1275 Turbo conversion

JPA

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63 Posts
Member #: 10036
Advanced Member

Finland

Hi you all,

I thought that it is time for me to show you my mini.

Let's start from the beginning to present time, step by step.

Bought it back in -96 or -97 for a daily driver.


Used it as my only car about two years until got it damaged in a collision, well twice in a short period of time.
First the front end which I repaired by replacing new RH front wing and front panel. Painted front end black with white stickers to make it chequered (easiest and cheapest way to make it look fairly decent).
Second damage was to the right rear corner, after which I lost the motivation and it was left standing still for few years (luckily to my parents garage). Rear subframe and RH radius arm needed to be replaced.


2004 got my friend to do his magic on the body, he replaced the damaged and rusty panels.
He also cleaned the rust off of gutters and all the usual places, ending in rust free body.



At the time it was 29 years old and due to rust it needed only, front half of front floors, A-panels, rear valance, outer sills, bottom part of LH quarter panel and some small "postage stamps" here and there. Good condition is because distributors back in the days, performed rustproofing to all cars.

Bodywork also revealed earlier collision damage on the right side. Due to this RH quarter panel and RH door needed to be replaced.

Next post, something about filler and paint.

75' Mini special deluxe.
1275 A+ engine with turbo on the way...


theoneeyedlizard

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7265 Posts
Member #: 1268
The Boom Boom speaker Police!

Essex

Looks like a good project.

What are the engine plans?

In the 13's at last!.. Just


JPA

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63 Posts
Member #: 10036
Advanced Member

Finland

On 19th Oct, 2015 theoneeyedlizard said:
Looks like a good project.

What are the engine plans?


Not bad one to start with...

Engine plan is to put standard 1275 A+ from mini mayfair in it, put the turbo on it, get it MOT'd.
Drop the boost down drive it for one summer (hopefully it won't explode) and after that build a new engine with good spec on it.

In Finland we have certain limitations when putting different engine in the car.
First need to know which engine in car model is:
- Largest volume, Cooper S, 1275GT, etc.
- Most powerful, Cooper S

After that you can choose the engine within the limitations of:
1275cc + 25% = 1593,75cc
76bhp + 20% = 91,2bhp

So basically I can not throw in turbo metro unit as it has too much power.

When adding turbo on an engine we have to have dyno sheet to proof the bhp figures on MOT.
So basically getting lowest bhp version of A+ is a good thing, trying to get 91bhp with boost as high as possible. Then after MOT is passed, nobody is monitoring bhp, maybe boost pressure. So basically engine can be modified afterwards, as long as the boost pressure is the same on next MOT's.

With old cars like mine, we don't need to think about emissions, which helps.

I am babling too much... :)

Stay tuned!

75' Mini special deluxe.
1275 A+ engine with turbo on the way...


D4VE

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2974 Posts
Member #: 10749
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lowestoft suffolk

Blimey.. regulations sounds a right bummer.. i heard it was like that in belgium too?

Welcome...

On 24th Oct, 2015 jonny f said:
Nothing gets past Dave lol

NOTHING GETS PAST ME!! *tongue*

1/4 mile 14.7 @ 96mph 12psi boost
Showdown class A 2nd place 18.6 @ 69mph


JPA

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63 Posts
Member #: 10036
Advanced Member

Finland

In the winter of 2004-2005 it was time for sanding, primer, body filler and paint.





Then artistic photo


Pushing my mini into the paintshop


Painted 23.3.2005




Everything else was done by me, except spraying the top coat and clear coat which was done by friend (professional painter).

Next post, putting it back together

75' Mini special deluxe.
1275 A+ engine with turbo on the way...


BENROSS

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9812 Posts
Member #: 332
Resident Cylinder Head Modifier

Mitsi Evo 7, 911, Cossie. & all the chavs ...... won no problem

excellent job well done, you just want a 190 hp turbo engine in there to make it go in style!






theoneeyedlizard

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7265 Posts
Member #: 1268
The Boom Boom speaker Police!

Essex

just get a bleed valve and turn the boost down for checks, back up for the rest of he time.

In the 13's at last!.. Just


Yo-Han

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971 Posts
Member #: 3228
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North of the Netherlands

Why not take the ERA for reference.
The Mini ERA had 94 hp (if I am correct)
Or can't you reference younger car models that are basically the same?



On 19th Oct, 2015 JPA said:
On 19th Oct, 2015 theoneeyedlizard said:
Looks like a good project.

What are the engine plans?


Not bad one to start with...

Engine plan is to put standard 1275 A+ from mini mayfair in it, put the turbo on it, get it MOT'd.
Drop the boost down drive it for one summer (hopefully it won't explode) and after that build a new engine with good spec on it.

In Finland we have certain limitations when putting different engine in the car.
First need to know which engine in car model is:
- Largest volume, Cooper S, 1275GT, etc.
- Most powerful, Cooper S

After that you can choose the engine within the limitations of:
1275cc + 25% = 1593,75cc
76bhp + 20% = 91,2bhp

So basically I can not throw in turbo metro unit as it has too much power.

When adding turbo on an engine we have to have dyno sheet to proof the bhp figures on MOT.
So basically getting lowest bhp version of A+ is a good thing, trying to get 91bhp with boost as high as possible. Then after MOT is passed, nobody is monitoring bhp, maybe boost pressure. So basically engine can be modified afterwards, as long as the boost pressure is the same on next MOT's.

With old cars like mine, we don't need to think about emissions, which helps.

I am babling too much... :)

Stay tuned!

Dazed and Confused....


JPA

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63 Posts
Member #: 10036
Advanced Member

Finland


On 20th Oct, 2015 Yo-Han said:
Why not take the ERA for reference.
The Mini ERA had 94 hp (if I am correct)
Or can't you reference younger car models that are basically the same?


If it is the younger model that's technically similar, it can be used but not in this case.
Earlier when I asked, they said that it can not be used because it is not same manufacturer as other minis, ERA turbo was produced by Engineering Research & Application Ltd. not Austin, Morris, BMC, BLMC, Rover and so on.

On the other hand I heard a rumour that nowadays mini could be modified to match model ERA turbo, then it would really need to be match, I mean, body, suspension, cooling, brakes. This I have not confirmed yet.
Maybe I don't even want to because of the brakes, brakes need to be taken from the model with highest power. This would mean to update to Metro turbo brakes but I want 10" wheels on my mini and I have cooper S brakes already.
I hate the regulations but can't change them...

75' Mini special deluxe.
1275 A+ engine with turbo on the way...


JPA

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63 Posts
Member #: 10036
Advanced Member

Finland

BENROSS and theoneeyedlizard you are right, that is my plan...

Lets continue what happened in spring 2005.
Color on these photos seems to be darker than it actually was.

LH side door in


RH side door aswell


Boot lid


Front end coming together



Almost ready with temporary license plate (sticker), ready for summer meet of mcff.net
Still missing some small parts.



Registered and ready, used it like this on summers 2005-2007.
998cc A-series with Stage 1 kit
Oh my god, my mom still has the same Almera...




So now we have gone through the first 10 years of ownership.
Next thing was to get fed up with the loss of power...

Edited by JPA on 20th Oct, 2015.

75' Mini special deluxe.
1275 A+ engine with turbo on the way...


D4VE

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2974 Posts
Member #: 10749
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lowestoft suffolk

Id put up with the regulations you have if i had all them garages and that land! Haha

On 24th Oct, 2015 jonny f said:
Nothing gets past Dave lol

NOTHING GETS PAST ME!! *tongue*

1/4 mile 14.7 @ 96mph 12psi boost
Showdown class A 2nd place 18.6 @ 69mph


Yo-Han

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971 Posts
Member #: 3228
Post Whore

North of the Netherlands

That makes (a bit of) sense...

Nice car by the way, would make a nice sleeper!



On 20th Oct, 2015 JPA said:

On 20th Oct, 2015 Yo-Han said:
Why not take the ERA for reference.
The Mini ERA had 94 hp (if I am correct)
Or can't you reference younger car models that are basically the same?


If it is the younger model that's technically similar, it can be used but not in this case.
Earlier when I asked, they said that it can not be used because it is not same manufacturer as other minis, ERA turbo was produced by Engineering Research & Application Ltd. not Austin, Morris, BMC, BLMC, Rover and so on.

On the other hand I heard a rumour that nowadays mini could be modified to match model ERA turbo, then it would really need to be match, I mean, body, suspension, cooling, brakes. This I have not confirmed yet.
Maybe I don't even want to because of the brakes, brakes need to be taken from the model with highest power. This would mean to update to Metro turbo brakes but I want 10" wheels on my mini and I have cooper S brakes already.
I hate the regulations but can't change them...

Dazed and Confused....


Shauna

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1043 Posts
Member #: 10424
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Swansea boyo!

I like the look of this *happy*

They don't die, they just get faster!


JPA

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63 Posts
Member #: 10036
Advanced Member

Finland


On 20th Oct, 2015 D4VE said:
Id put up with the regulations you have if i had all them garages and that land! Haha

Dave, that's my parent house and garage. Quite spacey.


On 21st Oct, 2015 Yo-Han said:
That makes (a bit of) sense...

Nice car by the way, would make a nice sleeper!

Yo-han, It sometimes does not make sense how it goes...
Example, BMW my -95 540 and M5 are not categorized under same model range. VIN numbers are too far from each other. If putting more power on 540 you have to use 286hp of 540 as a starting point to get maximum power limit of 343,2hp, not M5 340hp -> 408hp.
My friend is building 540 twin turbo at the moment, so it was easy example.

Thanks, it WILL.


On 21st Oct, 2015 Shauna said:
I like the look of this *happy*

Thanks Shauna.*happy*

75' Mini special deluxe.
1275 A+ engine with turbo on the way...


JPA

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63 Posts
Member #: 10036
Advanced Member

Finland

Snap in the head happened in 2007.
I want to put turbo in it, so bought used Garrett turbo, don't exactly know what model it is.
Flange is T2 and friend of mine who knows turbostuff says it should work fine on the mini.
Have to buy another one if it doesn't(, talk about Saab Garrett GT1752 has made me think).

Anyways wanting to keep the body as stock as possible gave me two choices.
Mirage manifold, which looks not so free flowing.
so DIY manifold it was...
Put the turbo in there with a flange bolted on.
Bolted flange on cylinder head


Welded them together (at the time I got access only to rod welder... I know excuses, excuses for bad welding).



Made Jig to hold flanges in correct locations, then started making the manifold.
At the time I thought that I need to make the intake also DIY-way.



Here it is, exhaust manifold is ready.
If it only was this fast and easy, actually it took 2 months total.

75' Mini special deluxe.
1275 A+ engine with turbo on the way...


JPA

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63 Posts
Member #: 10036
Advanced Member

Finland

I decided to go with fuel injection, so needed to make intake manifold.
First version with CAD.


Rolled piece of stainless to get the shape for intake, going with wet intake.
Testfit with injectors...

Then with throttle body installed



Not completely sure how it's going to work but time will tell.
Testing the fitment of cooler, still might install it under the alternator, location is still open...


Throttle cable bracket made and welded

Edited by JPA on 22nd Oct, 2015.

75' Mini special deluxe.
1275 A+ engine with turbo on the way...


jonny f

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2094 Posts
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Dorking

Looks good :)


D4VE

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2974 Posts
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lowestoft suffolk

Cool, are we still showing old pics or is the engine work now?

On 24th Oct, 2015 jonny f said:
Nothing gets past Dave lol

NOTHING GETS PAST ME!! *tongue*

1/4 mile 14.7 @ 96mph 12psi boost
Showdown class A 2nd place 18.6 @ 69mph


Shauna

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1043 Posts
Member #: 10424
Post Whore

Swansea boyo!

It's very well known I love a sleeper! Yeah, are these old photos? I'd put the IC behind the rad personally, it's a bit neater!


On 21st Oct, 2015


Shauna,21st Oct, 2015 JPA said:
I like the look of this *happy*[/quote said:

Thanks Shauna.*happy*

They don't die, they just get faster!


JPA

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63 Posts
Member #: 10036
Advanced Member

Finland

Once I'm finished with it, it'll be totally sleeper.

And yes, these are still old photos.

75' Mini special deluxe.
1275 A+ engine with turbo on the way...


JPA

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63 Posts
Member #: 10036
Advanced Member

Finland

At the summer of 2009, I was at the point of making the downpipe.

First put the pipes together with ducktape to see that it fits.



Then welded them...



Intake and exhaust all together.



Also made oil return from turbo to engine.


Next time, front subframe...

75' Mini special deluxe.
1275 A+ engine with turbo on the way...


wil_h

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Member #: 123
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Betwix Harrogate and York

I'm intrigued with the injection setup.

Sort of wet plenum, if you will.

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.


JPA

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63 Posts
Member #: 10036
Advanced Member

Finland


On 25th Oct, 2015 wil_h said:
I'm intrigued with the injection setup.

Sort of wet plenum, if you will.


That is pretty much the way to call it.
I thought to put complete injection and ignition system to it which I had lying around.
It is LE-jetronic from 100hp engine.
With this system I could not go with port injection so this is the way that it could work.
Basically "shooting" to the air space inside plenum, creating a mixture, then sucking it into the cylinder.
My friend has similar system in his opel and it works great on it, so I think I'll give it a go.

75' Mini special deluxe.
1275 A+ engine with turbo on the way...


JPA

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63 Posts
Member #: 10036
Advanced Member

Finland

Happened also at 2009.
Got this old front subframe on a trade.
Here it is washed in a parts washing machine at work.


Looking at original subframe did not give me confident to it's rigidity.
I also learned that mini racers use strengthened subframe, however at that point I did not find any instructions or photos. So strengthening was done by my own design. On the way I was learning how to use TIG welder.




Powdercoated and ready


So basically I have added about 2kg to it.
On the other hand wheels should stay on their places and weight has been added on driving wheels.
Hopefully giving good traction.


Assembled with 1.5° negative camber lower arms and adjustable tie rods.
Bottom arm poly bushes and hard rubber tie rod bushes.
Also with adjusta rides.


Edit: Btw, I found article on "How to" from MiniWorld January 2011 two years later.

Edited by JPA on 26th Oct, 2015.

75' Mini special deluxe.
1275 A+ engine with turbo on the way...


JPA

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63 Posts
Member #: 10036
Advanced Member

Finland

Next in project was to make adapter for distributor.
As stated earlier I wanted to put whole injection-ignition from the other engine.
So basically had to install also dizzy from that system.
Measured few different type of mini distributors and then designed the adapter.

Made a drawing on which machining shop made this, starting point.



Then made it smaller, in small steps.




What about the parts inside... Most of the parts are taken from old mini distributor, modified a bit.
Part on the left is machined off of camshaft, which is driving the distributor.


Then just combined them into one functional part.


Later on I had to modify it a bit to fit to A+ engine.

75' Mini special deluxe.
1275 A+ engine with turbo on the way...

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