61 replies to this topic

[alaskanow0]

I thought I'd share my latest project with you guys. Having built a few difference A series engines for my 77 Clubman, I started reading up none A series options. Surprisingly I was leaning towards the Micra 1.3 engine & 5 speed gearbox. Whilst I appreciate its not the most powerful engine, the tuning potential, weight and ease of fitment have steered me to take the plunge. I'm not looking for mega power. It's quite a heavy car and is purely for road use. The gearing looks about perfect for a fast road mini, with a nice 5th gear for motorway cruising. About 120bhp is my target in NA form, but leaving the options open for turbo charging at a later date.

This car as seen 13 different engines since 2006 including, 7 Ports, supercharged, turbo charged, SC wet manifold injected etc, the latest engine was a turbo 7 port.









I've now sold the A series,

Plan is to use Allspeed frame, arms and drive shafts.

Cg13de 1275 block, crank, Rods
Crank polished

Cg10de 998 late coilpack cylinder head (18k miles) with later CR engine spec solid shim less lifters, fully ported, gas glowed, valve cut back, 3 angle seats.
Coil pack narrow ring 998 flat top Pistons -used (18k) & new Nissan rings
773 Rally billet Camshaft 264 duration
Custom valve springs (8k Rpm to try and achieve 127.5bhp ie 100bhp per litre) very doubtful, need 90ft/lb torque at 7500rpm.
12-1CR
Fully balanced rotating assemble.
Full rebuilt, new bearing, chain & tensioners.
Face lift 998 flywheel
N15 1.4 Almeria Clutch
Hydrolic clutch conversation
K1100 34mm throttle bodies
Dta S40 ecu, and wasted spark Vauxhall coilpack
Fusion fabrication 4-1 manifold
Fusion fabrication inlet manifold, 400mm runner length for max power at 7500rpm.
Specialist components billet ram pipes.
Custom radiator etc.

I'm hoping for about 120bhp, but still very road friendly and reliable. Anything over 120bhp would be a bonus, as only running a 1.75"'Stainless RC40 twin box. The 34mm throttles have been chosen to improve throttle responsiveness and aid drivabilty. They should still flow enough air for 140bhp.

Edited by alaskanow0, 06 May 2016 - 07:09 AM.

[alaskanow0]

[alaskanow0]

I've done a dry build and should be collecting everything from the powder coaters this week. I've got a low mileage cga3de 1348cc engine in standard form to fit whilst the other engine is being machined and built along with a recondition 1.3 gearbox.

Plan is to have it up and running by the end of May, depending on the custom radiator etc.

I'll post up some more build pics as I go.

[smudger068]

The builds previously done look awesome so is going to be interesting to see how this turns out and what power ratings you will achieve as there seems to be no expense spared.

I am surprised you didn't have a differential fitted to the gearbox?

[sonikk4]

The 7 port looked good with the turbo on it. What power did that poke out??

[alaskanow0]

Gearbox wise, the open diff will be perfect for now. It's far to easy to get carried away with gripper diff, but for the road and 100ft/lb of torque will be a ******* cat compared to the prevous setups. The turbo was between 125-150bhp, dependant on boost. I was only running 6psi in general. Again it was built ultimately for road use. I honestly believe anything above about 150bhp is just a waste of time in a road mini.

I have another mini that's all about power to weight and big bhp. I might put some detail on here at some point, it's 75% finished. But 300bhp per tonne A series is the aim.

I'm trying to keep the costs down on this build, as most things eg Ecu, loom are from the prevous engine. The plan was to sell the full 7 port turbo setup and bank some cash, but I've spend every £ and more. That said am enjoying doing something different and so far no regrets.

[alaskanow0]

The car in full

[l_jonez]

Will be following this.

[lawrence]

I'll be keeping an eye out too. What's the reasoning behind the hydro clutch? Not a fan of cable?

[fuzzy-hair-man]

Love the yellow and black mini, mine will eventually get a similar colour scheme.

 

Your plans for the engine seem well researched and thought out, the coilpack flywheel is a pretty hefty bugger (has the toothed wheel so can only be lightened as small amount) is that why you're looking at the 998 one? Is there a aftermarket lightened version for the coilpack engine? or perhaps a trigger wheel on the crank pulley?

 

Anyway looking forward to seeing how this goes... Strange is this the first Clubby micra conversion we've had on here? Seems to fit the bay nicely.

Edited by fuzzy-hair-man, 04 May 2016 - 04:44 AM.

[alaskanow0]

Originally I was hoping to leave the master cylinders alone, hence going with a Wilwood pull slave and a modified bracket. Turns out I'm now going to run Wilwood small master cylinders to give me more space for the longest inlet runner length I can achieve.

[alaskanow0]

Love the yellow and black mini, mine will eventually get a similar colour scheme.
 
Your plans for the engine seem well researched and thought out, the coilpack flywheel is a pretty hefty bugger (has the toothed wheel so can only be lightened as small amount) is that why you're looking at the 998 one? Is there a aftermarket lightened version for the coilpack engine? or perhaps a trigger wheel on the crank pulley?
 
Anyway looking forward to seeing how this goes... Strange is this the first Clubby micra conversion we've had on here? Seems to fit the bay nicely.

Yes, I'm ditching the coil pack flywheel and fitting a 1998-2000 flywheel from a 18k miles 998. It's about 2kg lighter than the cg13de flywheel, yet still works with the cg13de box and starter motor. I'm still retaining the heavier cg13de crank damper though, with 36-1 trigger wheel fitted. Then unlike most, it will be running both belts for water pump and alternator with addional tensoners.

Plus the coil pack flywheel needs the later 2000-2002 gearbox, which doesn't fit the Allspeed frame anyway. With the coil pack engines the starter motors mount from the engine side rather than the gearbox.

[fuzzy-hair-man]

Ah, yeah sorry I misread there's a fair amount that can be machined off the standard dizzy flyweels.

 

https://www.micra.or...07/#post-478474

 

Planning on doing mine next time the engine is out, whenever that might be was going to be in there but the machinist reckoned he couldn't get the flywheel in the lathe...  .

 

PS: Funny that you're multi-grips match you're engine bay

Edited by fuzzy-hair-man, 06 May 2016 - 10:04 AM.

[blue gt]

What a awesome looking clubman, Was waiting for someone to this engine swop to a clubman. following with interest.

[alaskanow0]

Productive couple of days Thursday , Friday, but unfortunately I've put by my back out so Process will be slow over this week.

I've repainted the bulkhead, built up the standard 1348cc engine with a new LUK clutch kit and the 998 flywheel.

On the tuned engine I might remove more weight from the flywheel, but from experience, you can go to light. Hoping for 100bhp from the standard engine, and should set a bench mark and keep me entertained throught the summer.

My thoughts are

82bhp standard (maybe 75bhp, it's done 60k)

+ 10bhp for no Cats & manifold
+ 10bhp for throttle bodies
+ 5bhp remapped for performance over economy.

Ive welded a AN8 adapter onto the sump, just in case my Freshly rebuilt GT1752, finds it way of the shelf.

Edited by alaskanow0, 07 May 2016 - 08:09 PM.