I'm new to here
Turbo Mini Forums

Just thought I'd say hi as I'm new to this site. Some of you might know of my build from TheMiniForum but if you don't i'll give you a little insight.

Ive been building my car for the last few years now and have changed my through out but I'm pretty damn certain on what i'm doing now! lol I've gone from an N/a 1380 7 Port, to a 1380 turbo 7 port but now I've finally settled for 16v.

The current spec of the engine is;

Morspeed K1200 16v Head
Dry decked
73.5mm forged pistons
H section rods with ARP bolts
86mm EN40B forged crank to give 1480cc
4 bolt center main
5/16 block to box bolts
Quaife dog box with 2.9:1 ATB diff

At the moment I am looking into the turbo side of things and more importantly the clutch. I'm going down the lines of a twin plate set up using 2 AP Racing rally/race plates. I know there's loads of issues with inertia etc but these are problems i'm trying to get over step by step. As for the turbo, i'm thinking along the lines of a KO4 or something on them lines.

Good luck with all that, it sounds like it will be a monster of an engine!! There is plenty of info on here to help.

Yeah seems like it. Everyone seems to be looking for the same thing which is good.........more bananas! lol I hope it will be a bit of a monster. Not sure how much to expect from it once its done but I'm just aiming as high as I possibly can.

K04 should be about the right size i think,

the twin plates should be interesting, one issue is there will be tice as many faces to wear, so it will probably wear tice as fast, if that makes sense, but theres not really many options.

as i see it you can either,

do a twin plate with a grey cover,

run a double grey and put up with the stress on the thrusts and your foot,

adapt a verto as per roberts "clutch thoughts" thread.

hope another solution presents itself.

What are you doing for inlet and exhaust manifolds?

I'm going to fabricate everything myself and get it welded up by a local shit hot tig welder. I'm not so sure about the wear issue. Its not going to slip half as much as a single plate as it has twice the friction area......then again you could be right, I just dont know till its built lol

Welcome to Turbo Minis

the project sounds like it will be wild when its finished

Sorry, my mistake lol

That would really be helpfull. I seem to be on my own with this one and have only come across three pics on how to do it. Im currently looking for somebody who will make me the plate that is sanwiched between the two clutch plates.

The consensus of opinion of those on here that know about clutches is that the twin plate setup does not do the business.

You need to increase the clamping pressure, not the surface area.

Edited by Paul S on 21st Sep, 2008.

Saul Bellow - "A great deal of intelligence can be invested in ignorance when the need for illusion is deep."
Stephen Hawking - "The greatest enemy of knowledge is not ignorance, it is the illusion of knowledge."

But in all fairness, are they speeking from opinion or experience with the twin plate set up. In my opinion, a clutch using two greys doesnt do the buisness either as I don't want one leg bigger than the other after driving my mini to shows lol

This is possibly the best thread to read on the subject.



The twin spring verto has been proven to 180 hp ish.


Another thread on twin plates:

Edited by Paul S on 21st Sep, 2008.

Saul Bellow - "A great deal of intelligence can be invested in ignorance when the need for illusion is deep."
Stephen Hawking - "The greatest enemy of knowledge is not ignorance, it is the illusion of knowledge."

i used a double grey for about 200miles and it fooked everything! clutch pedal, clevis pin, master cylinder, clutch arm etc. it was heavier than the grey but still useable

This is exactly what Im thinking. I'm not after the next best thing or the simplest thing, Im just after something that is performs well and is as reliable as it can be. A clutch that is good for around 180 bhp isnt going to be up to mine if I'm honest. I don't like to say its going to have so many bhp and go X ammount of mph but Im aiming in acces of 250bhp. I would have stuck with the 5 port head if I was keeping within 200.

Welcome mate

This is the old clutch debate all over again

As for wear on the double plate set up - bollox!

Double the firction surfaces, double the surface area, half the wear rate, twice the torque capacity so half the wear of a single plate puts the clutch 'out of tune' but takes twice as long = the same as a single plate.

I wouls still be very concerned about a Verto clutch at 8500rpm!!! plus its a heavy Mother Hubbard, even the Minispares steel one.

I will put my money on the double plate.

And for those on about inetia and wear on the synchros. Consider the weight and inertia of one single sintered padle plate against two modified (and lightened by nature) organic plates :) The synchro problem goes away at the power levels OSB is looking at as a dog box is a must in all honesty.

Other than that, its going to be a real monster :)

Edited by Sprocket on 21st Sep, 2008.

Thanks Sprocket. This is what Im trying to say. I know there is an awfull lot of guys on here that know an awfull lot of shit but there isn't an awfull lot of people who are looking for this type of power, or more to the point, torque. If im honest, Ive only heard of a few cars knocking out this type of bannanas. And like ive read in a few threads in here from turbowilliams, he doesnt want a dog box as he wants it perfectly drivable which is fully understandable. Im just not holding back. If the motor needs something, its gunna get it.

Lile ive said on the miniforum, my main conserns are clutch and driveshafts now.

Good to see you are on form Sprox

Let's not re-start the debate. My intention was to bring OSB up to speed on the previous discussions.

I think that he should go with the twin plate. At least then we will have some feedback on it's potential as well as educated opinions.

Saul Bellow - "A great deal of intelligence can be invested in ignorance when the need for illusion is deep."
Stephen Hawking - "The greatest enemy of knowledge is not ignorance, it is the illusion of knowledge."

I completly agree. If it wasn't for that approach within mini tuning, we would all be running about with under 100 brake lol

One of the last things my grandad said to me=

Do you follow a path created or create a path to be followed?

if you never try you will never know

OSB i will be following your build progress and i hope all goes well

Yes i moved to the darkside

Instagram @jdm_brett

Oi Brett, did you have your red turbo mini in minimag once with gold wheels?