998 small bore BMW 16v options
Turbo Mini Forums

Hi all.

I'm still a bit at odds.

I can get a free 998 and convert it to a up to 1060cc. using a v16 bmw head i have, with the SC or MSPD bits you can get about 95-105 BHP without going overboad on longer duration cams and such. keeping the rev limit to about 7500..

trouble is I do have a bits for a 1330cc NA engine. st3 head RE13 cam the lot .. and that would probably make more power quite easily. I could fit the 16v head to the 1330 but I just dont feel like revving the pants of a 1275..

turboing a 1330..16v would probably just eat gearboxes (it does need to be able to drive 1000 km streches..and back).

what is more i could you build the 1330 as a NA engine and sell it build and get a faily decent amount of money for it.


Thus if i use a 1060 with the 16v and either supercharge or turbo charge it using only a modest amount of boost (if the original BMW K series engine is an indication. 3 to 8 lbs would be enough for me and push about 110 to 135 BHP)


now i am fully new to the whole practical side of the forced induction world and especialy turbo's.. i kinda get SC's but for turbo's the whole A/R and what not biz has me stumped a bit.

ther are a few ex cooper s SC about for near decent money. and you can get turbo chargers in two gazzilion variaties..doe anyone have a clue what units will be a good starting point.. note i would like the smallest unit available and just making big numbers is not really the point..
does anyone have deep thoughts on this subject.

That sir, is not rust, it is the progressive mass reduction system

http://aseriesmodifications.wordpress.com/

if I was going todo another bmw convertion, I would only use one kit, and thats SC. Speaking from experience of dealing with both people involved.

put the 16v head on the 1330.

I have a bmw headed 1312 with turbo, runs awesome!

Team www.sheepspeed.com Racing

If you did supercharge it, It'd certainly be unique. Hopefully you'd put it above the exhaust manifold, or move the alternator back above the exhaust. It'd look a little ungainly (and probably not even fit in a clubman front end) if you tried it in front of the engine with that K1100 head being so wide...


EDIT - I just remembered, hasn't JohnK supercharged his 8v? Perhaps you should speak with him. :)

Edited by TurboDave16V on 21st Aug, 2007.

I was under the impression that you could not fit the K1100 head to the small bore engine, but I stand to be corrected.

The Bini M45 supercharger would be a good choice on a 1060cc engine up to 15 psi boost. TD recently gave some good advice regarding supercharging an 1100 - same info would apply.

As for a turbo, the TT2 is using a GT1752 on a high revving 998 to give good results.

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 would have thought a 1752 would be bit in your face for a road going 998, would a T2 or a GT15 be better? That said, no points for guessing what turbo I've got kicking around.

The TT2 is certainly making more nanas than alot of 1275 / 1293 turbos.

Edited by Rob H on 21st Aug, 2007.

Ah that australian fella who has just joined is using a old mr2 charger. These powered 1600's. Compact. might be a good shout on this engine.

Back once again like a renegade master

Im being dumb, But who are 'SC'


Im looking into this kit as an option, As Im after more power!


cheers Radleigh

Lightweight racer coming soon.

Radleigh - I am Specialist Components (commonly called SC at times) - though in this thread I think SC is being reffered to as "supercharger" (apart from Jims comments!)
visit www.specialist-components.co.uk for info on kits.

cheers

Johnk

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

Specialist Components (JohnK on here)

http://www.specialist-components.co.uk/

To parts, nice people to deal with and good pricing too ..... don't forget to mention TM when ordering!

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

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

I have looked at a rotrex unit (which is about the size of an alternator and is basically a mechanically driven 1/2 turbo) but after inquiring about the price i was a little less enthousiastic. : (

I suppose a m45 would be fittable with the right manifold but it is a bit large. I doubt i could find the MR charger over here. to the best of my knowledge they where never imported here.

the turbo manifold would be quite a challenge i think,
Jimster do you have pics on how you solved that one ?

That sir, is not rust, it is the progressive mass reduction system

http://aseriesmodifications.wordpress.com/

Can anyone confirm that you can fit the K1100 head on a 998?

I thought the valve spacing meant that they hit the block.

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."

Dave,

Somone posted on TMF a little while back that Morspeed had a Scharged a 16v, there were pics on the website but they've now pulled them, I imagine it was just a showpeice, I also think it looks stupid.... also how little wrap around is there on the alternator pulley...

edited with extra pics

Edited by Joe C on 22nd Aug, 2007.

Right, I've looked into this a bit further.

You CANNOT fit a K1100 head to a small bore engine due to the different cylinder spacing.

This is my 998:



Note the large gap between cylinders 2 & 3.

The K1100 has relatively equal bore spacing as does the 1275.

EDIT: You can fit the K100 8v head - see below

Edited by Paul S on 22nd Aug, 2007.

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."

On 22nd of Aug, 2007 at 11:39am mini13 said:
Dave,

Somone posted on TMF a little while back that Morspeed had a Scharged a 16v, there were pics on the website but they've now pulled them, I imagine it was just a showpeice, I also think it looks stupid.... also how little wrap around is there on the alternator pulley...

Team www.sheepspeed.com Racing

OMG .....

If that was the first I'd seen of Simons work it'd put me off dealling with him forever!

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

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

Axle, the first K head conversion I saw was on an 850 and there were links too it on one of the original K head threads IIRC.

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

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

Ive also heard that 998 spacing is wrong for the K head. 850, 1275 are the only options!

Lol...I did think when I saw that pic that it would stick out a fare amount!
Didn't noticed the alternator pulley or water pump pulley!

Here's the link.

http://www.miniman.com.au/bmw.htm

https://www.facebook.com/pages/Fusion-Fabri..._homepage_panel

www.fusionfabs.co.uk



1/4mile in 13.2sec @ 111 terminal on 15psi

sorry - late in replying - the answer is yes you can fit a 16v head but with lots of cut outs in your block! - so not an option in reality. The 8v will fit due to only having to clear one valve on the piston edges. Don't under estiamte this head folks - especially in turbo form!


- had an email from Greg (the first one to do the conversion) the other day - nice chap, his engine was an 850 + 8v head for reference

cheers

JK

- on superchargers - I am still looking at doing a charged engine (the bottom end hardware is there), wether it be super or turbo I'm not sure yet - but it will be a front mounted Eaton - not a bini one and it will fit under the bonnet of a round nose mini!!!!

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

Ahh, Yeah sorry! I do know.. A friend of a friend actually just brought your kit! From heathrow way, if that means anything to you?

Had a nose around the site a few times, Just "SC" didn't click lol

thanks

Lightweight racer coming soon.

uuhm.

had not physically checked the 998 I more or less assumed it would fit as it does fit an 850..but failed to notice that was the 2V version

I could go and hunt for a 2V head, but
darn I'll just have learn how to live with excessive 1330 power then.

Jimster do you have pics of your turbo install ?? does it not generate too much power? (what am i saying...)



as for the pictured charger setup..
hmmmm.

I did not notice the water pump pully.. good eye

That sir, is not rust, it is the progressive mass reduction system

http://aseriesmodifications.wordpress.com/

238 nanas I seem to recall from the weekend..lol

....So not too much

Click on the link on Jims post.

https://www.facebook.com/pages/Fusion-Fabri..._homepage_panel

www.fusionfabs.co.uk



1/4mile in 13.2sec @ 111 terminal on 15psi

Hang on a sec - in Morspeed's defence (!) I don't think this particular example was engineerered to fit in a mini. It looks like the coil pack is mounted where an inner wing would ideally be?

I know its on a mini gearbox, but maybe it's for a midas or some other kit car?

I did see that also, but still, the water pump pulley....NOT good. It may also have been thrown together as a display engine.

ok - I'll give you that!

A disply engine should look a little better. Maybe no internals - but the externals should be spot on (IMO). That said - I've never assembled a K1100 head onto an A-series.

In every mini based kit car I've seen there is a bulkhead where that blower sits.

Had a good look at that GTM at the Pod on Sunday. Daily drive. Running 12s on a 1.8vtec.

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."