BMW K 16v head conversion
Turbo Mini Forums

elo people ive just joined hows it going,

I asked about this conversion on TMF and was directed to this forum becasue more people on here have done the conversion than any other forum so its probably the best place to get info.

Im very interested in this conversion and would like to know more.

what modifications to the block and the head are involved?

what options regarding fueling & ignition?

Which blocks are best to do it with? what problems are there between using different the bore blocks (850, 998 &1275)?

what about the exhaust? would you modify the manifold off the bike? or make a complete custom?

that'll do for now

any info appreciated,

J

Pictures here >>> Photobucket

Build diary, No turbo... yet...,here on TMF >>> TMF - My project

Try the search fuinction top right, this will give you plenty to read.

i did a search for "bmw 16v head" and it only returned 3 topics. maybe im not searching right...

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Build diary, No turbo... yet...,here on TMF >>> TMF - My project

Search for "K1100" then search for "BMW".

SHould give you enough to go on.

I don't normally do this but as my dog has decided to shit on the carpet and the smell in the workshop is now unbareable I've decided to retreat to the house and surf the net.

http://www.turbominis.co.uk/forums/index.php?p=vt&tid=11231

http://www.turbominis.co.uk/forums/index.php?p=vt&tid=10954

http://www.turbominis.co.uk/forums/index.php?p=vt&tid=10403

http://www.turbominis.co.uk/forums/index.php?p=vt&tid=9975

http://www.turbominis.co.uk/forums/index.php?p=vt&tid=9712

http://www.turbominis.co.uk/forums/index.php?p=vt&tid=9366

http://www.turbominis.co.uk/forums/index.php?p=vt&tid=9509

Also look out for posts by johnK & MadMatt and these guys really know there shit when it comes to Bimmer conversions.

Specialist Components (JohnK on here) can supply most of what you need including the build guide / destructions!!!!

There is no question of the quality of his work either. He's about to make me a very poor man .. LOL

Every day is a school day ...........

How fast and how expensive ...... the same question...

cheers rob, reading them all now...

bad dog!

J

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Build diary, No turbo... yet...,here on TMF >>> TMF - My project

yeah it does look good, but im also looking at the MRSPD kit, they do the maching the the head and the block as well. manifold is cheaper with MRSPD too.

didnt find anything in the seach about different bored blocks.

I still dont know which bore block would be best? 1275 for the cc's yeah but ive seen this done on an 850 block before and wondered why you would do it on a small bore? what advans and disadvans are there when using the different bore blocks?

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Build diary, No turbo... yet...,here on TMF >>> TMF - My project

hi J Whizzle - if you'd like any information which you can't find easily on here on the conversions feel free to pm me

cheers

Johnk

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

cheers John

PM being sent.

J

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Build diary, No turbo... yet...,here on TMF >>> TMF - My project

having done the conversion myself, but not using anyones kit, it's lots of work, go and spend your money with John K, it will save you time and money in the long run.

I've seen john's kits and they are designed and made really well!

Team www.sheepspeed.com Racing

when i get round to finding a head and a budget(<<<<<<Gotta finish the rest of the car first!!) to do the conversion i will definately be buying a kit cheers jimster.

you have a pm john

J

Edited by j_whizzle on 2nd Dec, 2006.

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Build diary, No turbo... yet...,here on TMF >>> TMF - My project

Yeah i have to agree with jimster. I am doing my own conversion and making the kit myself, i only live round the corner from John K and regularly pop round to see him. If i hadn't had done so much of my kit already i would have bought one of johns kits. As it is i may build a k100 8v 998 for my mini30 buying the bits instead of the way i have gone about doing the 1275 for my blue car. The man hours it has taken is about the same as i would have earned doing proper work instead of using the facilities we have at work!!

cool.

what heads have you 2 used?

what would be an advantage using a 998 block? is there more or less work using a 1275 block?

cheers

J

Edited by j_whizzle on 2nd Dec, 2006.

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Build diary, No turbo... yet...,here on TMF >>> TMF - My project

i have used a 1275 a+ block and a K1100lt cylinder head. I have seen the 8v used on an 850 block but not the 16v. The 998 block shouldn't present any problems as being slightly shorter it all fits in. As for the work i don't think there would be any less work over a 1275 block.

On the work side of things, my uni write up was 80 pages and that was because i was limited on my word count. Wotever you do its hard work either way, it doesn't help that this is the first engine i have fully rebuilt!!!

cool, so you did it as a uni project? O/T but what uni did you go to and what did you do? im loooking for next September...

anyways... so a 998 block would make it all fit under the standard bonnet, what have you done to your bonnet to fit the 1275 block under?

do you have any pictures of you engine?

what sort of power output have you got?

what mods can you do once the head is installed? cams valves etc.?

is this a road legal car? what cc is it insured under?

cheers guys appreciate the info

J

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Build diary, No turbo... yet...,here on TMF >>> TMF - My project

Yeah i did it as my HND Motorsport Engineering project, i went to Brooklands College in Surrey to do it.

My engine does fit under a standard bonnet but i know others have had difficulty. Its not finished as yet working for a busy motorsport team i have several demands on my time and this comes fairly well down my list!!! The easiest mod to do is probably to fit the RS cams which give you 284 degrees duration and 10mm lift, although i know John K runs some special ones in his!! It will be road legal and an everyday driver as a 1275.
As for power i would like to see 100bhp but i have been informed this will be easily acheived.

Anything else feel free to pm. if you want some pics, pm me your email and i shall send some over.
Anthony

cool will look at brooklands cheers.

i would want it to be a sleeper, so under the bonnet would be a must.

an easy 100bhp+ almost sounds too good to be true

yeah ill pm you my email, cheers.

J

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Build diary, No turbo... yet...,here on TMF >>> TMF - My project

thanks Jim and Anthony, Ant you'll have it built soon!

J - the 1275/large bore will fit under the std bonnet just - but only if you use a glass/single skin one - you'd struggle lots with the bracing under a std steel one.

you can have cams ground - but these are on a bespoke basis and the profiles need serious consideration before delving in. you theb hace the added complication of having bespoke "lash-caps" made up (little top hats that sit on top of the valve stems/under the cam buckets, then the really soul destroying job of setting your valve clearances now you've effectively thrown all the std clearances out of the window (factor in 16 new cam buckets at £11 each)Valves are again bespoke and you are limited t o+1.5mm max due to the std seat inserts. It quickly gets very expensive.
mines aroad car,insured mot'd etc no problems

cheers

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

cheers John, ive emailed you

would be using single skin bonnet anyways for weight loss (ive cut the bracing out of my steel one)

so a 1275 block would be ok then, maybe an LT head and RS cams in at a later date?

does the block need to be bored out? is this just for extra capacity the bored in the head dont need 'lining up'?

cheers

J

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Build diary, No turbo... yet...,here on TMF >>> TMF - My project

Hi J - if you can get a 1100RS is the best starting point for a 16v or any of the 8vs as they all came with nice bumpy sticks as std. You can go some way to centering the bores by offset boring but you'll never get them all equel - 1+2 will always mirror 3+4. I don't believe this is a problem - the nice thing about the comapct BMW chamber is it keeps the valves well away from the cylinder walls - hence does not limit the gasflow into the cylinder in the same way as do heads which have the valves rammed out against the walls.

if you have a perfect bore 1275 - stick with this.

John

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

ok cool, ill keep an eye out for heads but they are quite rare arent they? where have you sourced yours from?

maybe a rebore at a later date to up the cc and power a bit more.

cheers John and everyone, its a great help

J

Edited by j_whizzle on 2nd Dec, 2006.

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Build diary, No turbo... yet...,here on TMF >>> TMF - My project

J try Motorworks or James Sherlock or good old ebay - these three seem to have the majority of them!

John

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

quick look on motorworks complete 16v head with all cam gear etc. £350, doesnt seem too bad. just gotta finish the rest of the mini first...

J

Pictures here >>> Photobucket

Build diary, No turbo... yet...,here on TMF >>> TMF - My project

J, I use a 1275 A+ block and an LT head, standard valves and Cam. I've not played with cam timing yet, but I think the cams should work well with my turbo.

There are photos on me website http://mini.lyons-it.co.uk

Team www.sheepspeed.com Racing