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1993 Cooper Rebuild & Turbo Conversion


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#31 magicmat

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Posted 17 December 2008 - 01:12 PM

Sounds monsterous.

Have you seen the ultimate mini's dvd? there is a mini on there with a turbo 200bhp lump. And it just seems un driveable, as it jumps to the side with torque steer !

#32 John H

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Posted 17 December 2008 - 01:25 PM

Yeah a decent LSD will be in the mix to try and minimise the torque steer and some adjustment to the suspension geometry. You never know. 150BHP may scare me too much to consider an upgrade.

#33 magicmat

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Posted 17 December 2008 - 01:31 PM

150 in a mini may just be more than enough.

My brother has 330 in his rx7 and thats rather scary ! but that is a good chunk heavier than a mini.

Keep up the good work! im looking forward to the pictures !

#34 buddylove

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Posted 17 December 2008 - 11:36 PM

I think 150 in a mini will be more then enough :lol: Talk about wheel spin.

#35 John H

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Posted 22 December 2008 - 10:56 AM

I really am going to have to pop over with a memory stick and get the pictures.

Called into my cousins on friday. He has the wings, front panel and a-panels all on now. So coming along nicely.

#36 John H

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Posted 24 December 2008 - 07:36 PM

Called into my cousins today with a memory stick to collect some pictures. The bonnet currently fitted may not be staying on it forever. My cousin only used it as the new one I have isnt quite as good fit as it could be being a pattern panel.

So I'm on the lookout for a good condition genuine bonnet.

Once he has finished stitching on the last new a-panel he is moving his attention to the back end where it needs a full valence and possibly a boot corner repair panel.

Edited by minimadmotorman, 24 December 2008 - 07:36 PM.


#37 apbellamy

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Posted 24 December 2008 - 07:51 PM

Looking good. :D

#38 magicmat

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Posted 26 December 2008 - 09:56 AM

Very nice.

#39 buddylove

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Posted 26 December 2008 - 06:25 PM

Coming along nicely :shifty:

#40 John H

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Posted 09 February 2009 - 10:36 AM

Suppose I really ought to get started with this again soon.

Maybe I'll start buying things for it, or rebuilding the subframes.

#41 John H

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Posted 20 February 2009 - 03:26 PM

No real progress so far this year but on the plus side I have my new gauges.

Posted Image

TIM Electronic Oil Temp
TIM 1 Bar Boost
TIM Electronic Oil Pressure

Should do the job.

#42 John H

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Posted 10 March 2009 - 12:06 PM

Well I've just done a rather silly thing.

I have gone and bought some Forged Accralite 73.5mm 18cc Pistons.

I have also agreed to buy another intercooler which was used on a turbo mini that ran in the 12's on quarter mile.

So looks like I am going 1380 turbo and will be knocking on the door of 200bhp!

#43 John H

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Posted 20 March 2009 - 11:46 AM

A little bit of piston porn here!

Posted Image

Inside there are 4 of these plus pins and ring sets.

Posted Image

Mmmmmmmmm. I think I need some alone time in the toilet now. >_<

#44 John H

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Posted 12 May 2009 - 01:50 PM

Well again not much physical progress made but more money spent.

I have just invested in a Quaife ATB diff with 2.95 final drive to help me get the power down.

I have also bought an intercooler setup and plenum from a nice chap on turbo minis as shown fitted to his car below.

Posted Image

A point worth noting is his car was producing about 200bhp and he ran the quarter mile in less than 13 seconds with this cooler.

#45 John H

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Posted 12 May 2009 - 03:08 PM

There seems to be a significant difference to my original engine spec now!

Fully rebuilt gearbox with Metro turbo challenge SC gearset
Quaife ATB diff with 2.95:1 final drive
Centre oil pickup
Paul Wigington oil baffle tray
Tran-X 1:1 straight cut drops
Minispares lightweight steel flywheel
Double grey diaphragm & rally clutch plate
2 bolt centre main strap
reground & balanced turbo crank
new mains & shells
standard a+ rods with ARP bolts
new cam bearings
Avonbar phase 2 turbo cam
Cast duplex timing gear with offset keyway
Accralite 73.5mm forged 18cc bowl pistons
Ported water jacket
Threaded BSP oil gallery plugs
BENROSS 11 stud works cylinder head with 35.7 & 29mm Valves, Silica bronze valve guides.
ARP head stud set
1.27 ratio pressed steel or 1.3 ratio roller tip rockers (undecided yet)
Standard Metro T3 turbo
Ported T3 exhast manifold & enlarged T3 elbow
Avonbar billet actuator set at 8psi
Metro turbo inlet
Metro turbo carb
Nic Stainless plenum
Custom alloy front mount intercooler
Group 'A' dump valve
Megajolt mapped ignition
Electronic boost controller

Going to aim for a compression ratio around the 8.3-8.5:1 marker so that off boost will be manageable.
At that compression it should still be good for 18psi on the T3 and upto 20psi when I change the turbo for a T25/GT1752




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