Finally made a start on the engine
Turbo Mini Forums

Well,,,, its been in the pipeline for about 4 or 5 years now, Ive been gathering various bits and bobs and tonight, long overdue, i actually, finally, (kind of) made a start....well, on the engine anyway

started this thread to try and keep the momentum going more than anything else

rough spec will be:

std bore (998), mg metro cam, 295 benross head, metro turbo setup (std t3 to begin with, a more modern turbo at a later date), cossy ic, megajolt, all sat ontop of swiftune drops, jkd box, quaife lsd (3.7 semi helical fd) running about 15+ psi
(for hillclimbing)

Apologies its nothing exotic like 16v injection or the likes, thought id start off small and work my way up!

Tonight i stripped the best 998 A+ motor I have, its a 16k motor out of a metro i pretty much got given, so not much to complain about, gonna do the basics:

convert to 11 stud
get the centre main cap milled flat/fit strap
get some longer main cap bolts off carl
file some slots into the block for the thrusts (tips hat to slater)
find some grubs for the oil galerys
clean up pistons and fit new rings
convert to floting pins
fit new b/e bearings
new followers
fit arp rod bolts (only for piece of mind as it will be sat on about £2000 of gearbox/dif)
paint green
and thats about it

at this point im not sure if i can be arsed pissing about with oil jets or a pre-pump filter set up, all on the wish list of course, but ill see how i get on with the above first

painfully slow progress guaranteed on this one gents

wish me luck

joe

"Turbo's make torque, and torque makes fun"

"did you know you can toast potato waffles?"

Best of luck Joe.

I read alot of your posts about 12G295s when I was speccing mine. I did always wonder what happened to the engine. I assumed it was build and all I guess I'm not that slow, I've only been at it for 2 years.

P.S. Oil jets are a right ball-pain on small bores (as are most things). I would think long and hard before commiting to them.

On 12th Nov, 2009 Paul S said:

I think Gary OS has taken over my role as the forum smart arse

another lamb to the slaughter lol,

Good look with it dood you will need it :)

This has been a long time in the making. Sounds like it should do the business though. What pistons are you using BTW?

http://www.twin-turbo.co.uk
http://www.hillclimbandsprint.co.uk/default.asp

A man without a project is like a like a woman without a shopping list.

cheers guys, life and other hobbies/minis have been taking priority, so the turbo project has never really 'taken off' till now

at this point i have a choice of piston ben, nothing set in stone, i have some mint A+ slippers that came out of this motor (didnt you manage to disintegrate a set at about 15psi?),

or i have some pre A+ rods and pistons (with circlips) which need new rings, pretty sure they will be 20773s, but havent looked any closer to confirm, not sure what else they could be though? will check in the week

im missing a big end cap off this set though, and the bearing faces are quite pitted from surface rust anyway need to mod the A+ rods to fit these pistons.

From other posts, it seems the 20773's are preferable to the slippers, so was gonna go with these.


Ben, also i noticed from an old thread that you and wil are using hypertecs in the hillclimber, can these be got in std bore? or have you gone +20?

Ideally id go for these, but really want to keep in the std bore and thus definately in the 1400cc hillclimb class.

although i doubt anyone would ever check, how would they veiw a +20 bore?

"Turbo's make torque, and torque makes fun"

"did you know you can toast potato waffles?"

ive just realised your avatar........


its just milky joe in a wig!
lol


good luck with it bud

Vince: Hey, Milky you son of a bitch! I got ya a drink, there ya go...

Milky Joe: *drops his drink, being that he is, after all, a coconut man*



drilled and tapped for 11 studs on sat, a 1275 hg slips on and off no probs so cant be too far out, but i noticed none of the 998 hgs i have lying about have 11 studs? are these available? or am i gonna have to punch the extra holes into the 998 gasket?

this in turn also raises the question, can small bore heads be drilled for 11 studs like the large bore heads? cant recall if any factory small bores had 11 stud, tbh ive never thought about this before..?

gave the pistons a good mr muscle, were coming up a treat, but found one of them have been dropped/crushed and the skirt has a flat spot

so gonna buy some std bore megas (if available, as i cant seem to add them to my basket atm) next payday:
http://www.minispares.com/Product.aspx?ty=...8%20MINI%20+0...

if nla im considering giving the slippers a go, from the old posts, it looks like when wils failed there was no clear verdict on why the ringlands went, also, after a good rummage on the search, i cant find any other slipper failures?

fingers crossed MS will have some megas..

On 4th Nov, 2008 spanner181187 said:
Best of luck Joe.

I read alot of your posts about 12G295s when I was speccing mine. I did always wonder what happened to the engine. I assumed it was build and all I guess I'm not that slow, I've only been at it for 2 years.

P.S. Oil jets are a right ball-pain on small bores (as are most things). I would think long and hard before commiting to them.

"Turbo's make torque, and torque makes fun"

"did you know you can toast potato waffles?"

wont tom have to finish his before yours can take longer? lol

Joey,

The +0.030" Hypatecs from Minisport Australia are the same pistons, but a lot cheaper.

http://www.minisport.com.au/prod23.htm

Alternatively you could use +0.080" flat top which are even better, but you would need to open up the head.

Edited by Paul S on 10th Nov, 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."

Im trying to keep it std bore paul.

Ive spoken to MS, they dont have any megas, but have a set of p20773's in stock which will be on there way to me right about now i hope

What dish do the 20773's have?

might have to skim a shade off the head now..

"Turbo's make torque, and torque makes fun"

"did you know you can toast potato waffles?"

The 20773 are 6cc dish according to Viz.

I have a set of +0.040" 20773s for a future project but I can't remeber what !

Don't you dare skim a 12G295

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 10th Nov, 2008 Paul S said:
Don't you dare skim a 12G295

"Turbo's make torque, and torque makes fun"

"did you know you can toast potato waffles?"

Get another 12G295 that someone has already skimmed.

If ever you want to go to the stronger flat top pistons and a reasonable boost, you are going to need the full 28cc.

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."

Im not thrilled about having to skim it paul, as it took me nearly a year to find a fresh casting (nos) at half reasonable money, since which has had about £300 worth of bits/work done to it :(

i dont think i can afford to do it all again

"Turbo's make torque, and torque makes fun"

"did you know you can toast potato waffles?"

can you not get standard bore flat tops from minisport oz then?

not by the looks of it

http://www.minisport.com.au/category5_1.htm

"Turbo's make torque, and torque makes fun"

"did you know you can toast potato waffles?"

If it is not too late, I have a set of used flat top, full skirt pistons std size 998. With pins and circlips.

You will need a set of rings.

You can have them for the cost of postage.

That will be cheaper than skimming the head.

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."

paul, what can i say to that!

what are they? if rings are available and theyre up to the job then youve saved me so much greif!

"Turbo's make torque, and torque makes fun"

"did you know you can toast potato waffles?"

The pistons are stamped 20528. Standard early A+ 998 pistons. Full skirt rather than the later press fit slipper jobbies.

Rings are 2 compression 1/16" and a 5/32" oil ring.

Use these rings but leave out the 3rd comp ring.

http://www.minispares.com/Product.aspx?ty=...FOR%20998%20A...

Edited by Paul S on 10th Nov, 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."

unbelievable, i even have a ring set in stock,

paul your a dream boat! ill pm you

"Turbo's make torque, and torque makes fun"

"did you know you can toast potato waffles?"

ahhh TM strikes again!!! loves it!!

yep, got a flat top set of pots, and a high capacity oil pump sussed all in one night, gotta love TM

"Turbo's make torque, and torque makes fun"

"did you know you can toast potato waffles?"

Sigged!

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

www.fusionfabs.co.uk



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

You are right, none of the 998 heads had 11 studs. I'm not even sure if you can drill through, you might just end up in the water jacket.

As it goes 11 studs generally aren't needed. My first engine never had them and had no probs. it was only when I got a new head that the problems started.

I know you have rilled them, but leave them off for now. if you get a problem, then fit them later.

Fastest 998 mini in the world? 13.05 1/4 mile 106mph

www.twin-turbo.co.uk

Whil is right if you drill trough you will hit the water jacket you can drill a 18mm hole and tap it M19 then screw and locktite that in and drill your hole trough that but a lot of work for little return.