Complete noob doing a turbo... Eventually
Turbo Mini Forums

A long and slow project from someone without a clue :)

Thinking of trying at a 998 turbo and having no experience at anything to do with an engine other than changing spark plugs I'm relying on you guys for help :)

Been on tmf and I think I've come up with something but still somebits unclear to me.. Here goes :)

So a 1275 +20 thou
Head to suit
pistons to suit
Mg metro camshaft
gt17 turbo
intercooler
mpi tank and fuel pump
metro fuel reg
metro turbo carb
metro turbo inlet manifold
metro plenum chamber
std mini gearbox with minispares x-pin diff
Orange clutch plate
Megajolt kit

That's its so far ... Advice and missing bits appreciated :)

Many thanks Craig

Edited by Craigr91 on 11th Oct, 2013.

welcome to tm

heres how Wil did a 998 turbo in 20 hours:
http://www.turbo-mini.com/62147.html

and the rest of the website is full of invaluable info about turbo minis
anything not covered can be found via the search bar

i personally wouldnt rebore the engine or swap out the pistons if it doesnt need it as 998's are strong little engine and can cope with 10psi

(my gf's 998 did 120k before blowing a headgasket and replaced it with a 1275, after looking at it would probably have gone another 50k atleast!)

rest looks good
but will need a sealed carb, plenum chamber
and a mirage manifold if you dont want to cut the bulkhead
or metro turbo manifold with a t2 adapter plate

think thats about it :)

Reading up on RTS Clutches

I'll get engine out and then get a friend to check the condition, what would I expect power wise from std turbo 998?

And I totally forgot about the 998 turbo on that site, damn, read n research here I come thanks

probably around 80-90 reliably

also quite expensive when you consider a 1275 not being much more £ to do the same spec but get better figures when it comes to your first spec list & get 150+hp

Edited by WRLondon on 20th Jul, 2013.

Reading up on RTS Clutches

May change to a 1275 then if can get one reasonably priced I guess

On turbo-mini he's quoting 140bhp max, so nowhere near that then?

That's for hill-climb competition fully forged monster engines
Can get well over 200hp from an a series but power is nothing without reliability
Especially if it's going in a road car?

Edit:
If it was for a road car I'd personally build what you want to have for a long while as its out of the car
Once you go turbo the want for Moaaarr power is always there haha

Edited by WRLondon on 20th Jul, 2013.

Reading up on RTS Clutches

Yeah a road car, so what would you recommend? For a turbo ? Thanks

That's what I fear, not being enough power in 6-12months time, I found that win motorbikes, power just became normal after few months and needed more power haha

1275+
1293
Omega cast pistons
T3 cam or phase 2 cam
Modified head / bigger valves
And a t3 turbo or gt17
Good clutch
Straight cut drops & twin pin diff
Run in low boost and if you get bored whack up the boost
That set up should see a reliable 150+ if built & set up well

Reading up on RTS Clutches

Now we're talking, but reckon I should turbo 998 as I've never had a powerful car before? And upgrade all the turbo stuff and build a 1293?

its not too different you just have to be responsible and not rag it about chasing porsches haha

there is little to no difference in insurance or cost to build between the two so i'd just go for it
if you can get all the kit in one bundle it'll be alot cheaper too so just keep your eye out

persume you where born in 91 so should be over the
"Check this out babe" stage to an extent

Reading up on RTS Clutches

Haha yeah I'm well over that, I just want a real car now haha ill keep an eye out for parts now and if funds and the right engine pop up might just go the 1275 route :)

list of parts to collect :)

So a 998 +20 thou and pocketed to accept 12g940 head
70773 pistons
Mg metro camshaft
gt17 turbo
intercooler
mpi tank and fuel pump
metro fuel reg
metro turbo carb
metro turbo inlet manifold
metro plenum chamber
std mini gearbox with minispares x-pin diff
Orange clutch plate
Megajolt kit

If I missed anything let me know and I can add :)

Edited by Craigr91 on 27th Jul, 2013.

get an mg metro cam

Ah yes, I think I do remember a mg metro cam being mentioned :) thanks

Seen a 12g940 for sale which but its has 36/29 valves where has standard '940 heads have 33/29, will this head be compatible with my setup?

Thanks

Hiya 12g940's came with two inlet sizes as standard 33mm for lower spec early cars and about 90on and 35mm for mg metro spec engine. For a 998 build i would go for a smaller inlet valve size and ideally a turbo head as the valves are a better grade.

My small bore turbo project http://www.turbominis.co.uk/forums/index.php?p=vt&tid=473901

I would not bother with a turbo head. Just a standard 12G940 will do. With the chambers opened out to lower compression.

I would seriously consider not using a GT17. It looks great as there are 998s out there with them running big power. I am one of them and I would not like to use it on the road. It would be a laugh for a while, but just annoying after a while. Put a T2 or a GT15 on and it will be a better engine. If you really want big power stop pissing around with a 998.

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.

I've been told I will be going 1275 at a alter date possibly, when funds alow and when the insurance finally pay me for my bike, reckon I should just try get a 1275 short block? With big valve head, and a gearbox with a good ratio to suit? And if I do that, still ditch the gt17 turbo?

If you go 1275 then GT17 is perfect.
However with 1275 turbo you will need a box that is in a (very) good condition to cope with the extra power.
Extra power will also mean dropgears need to be looked at; either use straight-cut or MPi ones (have a search).

Dazed and Confused....

I will do some search, might just go fr this head then, assuming mpi gears are all te same box as any other age a+ engine?

Dazed and Confused....

I was under the impression that MPI gear boxes where made of something close to chocolate and cheese gear wise? gather this would include the drop gears?