More information on twincam conversion.
Turbo Mini Forums

any where i can find more update detailed information about building K1100 twin cam conversion.

1) i need to know what to do about oil drain to block from cylinder head how to do that?

2)How do you top up the oil (can twin cam cover be drilled for hole to create a top up oil hole)

cheers

jay

I have to agree with peter there, the whole project is not for the faint hearted!!! I have stalled with mine due to lack of time and money but everything is planned out ready for the next cash injection.

I found everything on the websites good, but after seeing the directions they went in i formulated my own in lovely aeroquip hoses and fittings!!

i have to agree

if your worred about the small things then i would not bother

i like to think (no laughing please) i am very mechanically minded but as stated in another thread jims twinky baffles the shit out of me

This conversion doesnt scare me that much. i am just thinking of way to make it better for oil drain system. as i have some idea myself but i dont know if they works but in the theory, they _should_ work.
but only time could tell if i get my hand on bmw K cylinder head.

the oil drain is the simplest problem, there are lots of options, which ever you choice you will need a tig welder to weld a pipe to the head.

You can either take it from the back of the head and into the fuel pump plate, / weld a boss on the gearbox.

Or you could come out the side of the head and into the transfer housing like I have.
Or even out the front of the head and into the dizzy hole.

As regaards oil filler, you could weld a cap to the cam cover, but you will need a fairly large oil drain then, I wanted to get the oil to the box asap so I went into the transfer housing.

Team Racing

This conversion doesnt scare me that much. i am just thinking of way to make it better for oil drain system. as I have some idea myself on the oil way system but i dont know if they works but in the theory, they _should_ work.
but only time could tell if i get my hand on bmw K cylinder head.

about the oil filler cap, as 1275 block is taller than 850 block shown on that candian website.
so i guess the oil filler cap would get in way of standard bonnet. but like you said it is a minor thing. I like have a sleath mini.

so what ideas do you have then?? there are some many options, you could always let the oil fall down the old push rod holes as it was in the a series.

Team Racing

the standard cylinder head drain hole. cut that out, and weld a box section across the bottom of bmw k cylinder head, and leave out the drain holes (push rod holes) open. using new box section cover this area.

or

i dont know the insides of K 100, judging from pictures i seen on internet, Dry Deck cylinder head, and seal off the block waterway, and drain holes and create some sort of sleeve that goes though the block's oil ways all way to cylinder head oil way system? that wouldnt work i presume. just ideas.

Failing that... i should build myself a well tried and tested turbocharged a-series

I went for the drain down to the fuel pump blanking plate - from the underside of the head and the front "dry" cover as well - works well apart from its fiddly to install when engines in. Filling of the oil through the breather on top of transfer casing - easy!

JK

If Carling made Mini engines
it would probably be like this one!

i need a head too! i'll get one soon.

or you could use a side plate block & do this--->

http://www.users.bigpond.net.au/TheMiniMan/donk1.JPG

it`s all here if you need some help--->

http://www.users.bigpond.net.au/TheMiniMan/page2.html

there`s plenty of stuff to do,,,& yeah it`s not an "EASY" job, but once you`ve done a few it becomes a lot easier

www.miniman.com.au

"""LazyGoodForNothingSmartArseKnowItAllBackYardMiniMechanic"""

Oh!!! & it might pay to drill some small holes down low in through a few of the camshaft bearing carriers, some of them hold oil for so long that even over night there`s still a whole heap of oil sitting in the wells between cam carrier caps, & when you take the cover off to "play" with cam timing etc, all this oil stuff p!$$es out all over the engine

just a thought for all you guys planning on building one as i found with a few of mine that it really does help especially if you "play" with cam timing or cam swapsys a lot & don`t want to wait a whole heap of time to let oil drain away from those areas...it takes ages & ages to drain down past the buckets.

Remembering that these engines "Normally" lay down in the bike so oil drains away quite well via the cam """cover""", just doesn`t do it that well sitting upright & fills up the wells between the cam carrier caps & stays there for ages,,,during normall running the oil fills up these areas & then has to overflow over the cam caps to get back down to whereva your drains are located,,,not very yummy tell your mummy

hope that made sense to at least some of you



sorry,,,just can`t help helping, i`m just that sort of guy

Edited by MadMatt on 24th Jul, 2006.

www.miniman.com.au

"""LazyGoodForNothingSmartArseKnowItAllBackYardMiniMechanic"""

Having seen Jims car, i have huge respect for anyone that successfully completes this project. It looks hugely complex!

On 24/07/2006 16:28:42 MadMatt said:

or you could use a side plate block & do this--->

http://www.users.bigpond.net.au/TheMiniMan/donk1.JPG

it`s all here if you need some help--->

http://www.users.bigpond.net.au/TheMiniMan/page2.html

there`s plenty of stuff to do,,,& yeah it`s not an "EASY" job, but once you`ve done a few it becomes a lot easier

Edited by Sprocket on 24th Jul, 2006.

The one i`ve used in the pics is an early Australian clubman GT block, basically the same as a MK2 "S" block (except with GT eng number of course) but is probly even rarer than the "S" block as there were very few "side plate" type early GTs produced,,, shame really hey? But they are a far better breathing & oil draining block, so i did what i thought would be better for the intended purpose, i do have another one that matches the body number of my Gt tho

Am producing an 8valve, turbo charged, 998cc version now too.

just can`t help myself can i ?

www.miniman.com.au

"""LazyGoodForNothingSmartArseKnowItAllBackYardMiniMechanic"""

top stuff matt, keep us posted.

the valves in the 8v head are huge arn't they!

Team Racing

34mm inlets and 30mm exh - but I'll bet the ports flow a lot more air than an iron 5 port with 36*31 sizes.

Matt - had your car on the dyno yet?

If Carling made Mini engines
it would probably be like this one!

Standard 998 bore, no chance, 8 or 16 valves.

To get the valves to fit requires lots of machining work and thats been covered.

Still think the 850 block is the one to start from for the small bore, you cant off set the bore enough on the 998 before running out of metal

There are other ways though, and if you cant work it out, im not telling

Edited by Sprocket on 26th Jul, 2006.

For more info see the new Practical Performance Car with a feature on John K's car!! Looks very nice! Well Done john

sprocket, is that a linered 998 block?

I've seen the future and tbh its Pie

Antman - any slim chance of a scanned copy of the article finding it's way to dave@sheepspeed.com ???

that in the most recent mag???

I've seen the future and tbh its Pie

Edited by Sprocket on 26th Jul, 2006.