1098 Build Dilemma
Turbo Mini Forums

Hi all, I have been trolling on here for a while and I'm very impressed by the tech content of the site and the number of stunning cars.

I have been hoarding parts for a 1098 fast road build for the last 2 years (its taken so long because I'm a tax-dodging student with no money). I've finally got all the parts together for the build but I ran into a problem. The only pstons I could get for a 1098 were the Hypatecs with a 7cc dish. Combined with a 12G295 head which has been opened up slightly to Vizard's spec I now have a massive chamber volume. I would need to take a dangerously big skim off the 12G295 to get a suitable CR for a NA application. This got me thinking about turning to forced induction.

Here's a quick engine spec:
12G295 head to Vizard's spec with 3 angle valve seats and guide bosses removed
SW5-07 cam
Standard rockers
Megajolt ignition
1098 +0.060 pistons
Standard rods
MED nitrocarburised and reground crank
33mm inlet valves
28mm exhaust valves
Pre-verto clutch setup with ultralight flywheel
Rebuilt gearbox with Minispares crosspin diff

I know the eaton M45 is the supercharger of choice for big bores but would it be suitable for a small bore everyday car? I only want a relatively low boost supercharger as I want a well a mannered car with lots of torque and i will be using a rev limit of ~5,500RPM. Also the M45 looks like a hefty lump, would space be an issue if front mounted?
Whilst searching on here I also saw people mention the M24 and SC12 superchargers. Would these better suite my needs and are they readily available? (I haven't found any on ebay recently)

Thanks for being patient with me as I'm (obvioulsy) a forced induction newb

On 12th Nov, 2009 Paul S said:

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

Welcome to TurboMinis.

I would fit a T2 turbo on a Mirage manifold. With a decent intercooler you could make as much power as the gearbox can take.

If you really want to use a supercharger, then the easy solution would be to use a Vmax kit with an M45 blower mounted at the back of the engine.

The other superchargers are relatively rare. The SC12 seems to have been used extensively is Australia. The M24 is very rare. I have one, but it is the only one I've seen on eBay.

The proper way to supercharge a mini, in my opinion is to front mount the blower and use an intercooler but you would be ploughing a lonely furrow as no one else has done it and published how.

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."

Thanks for the welcome and the advice Paul.
I'm not set on running a superchager by any means but I just thought a supercharger would be a quicker and easier solution to my problem since there is no oil supply to worry about.
I have basically run out of money at this stage so I dont think I could afford one of the Vmax kits. I initially wanted to front mount the superchager which is why I was concerned about the size of the M45.
I think I'll start reading up on a T2 setup

On 12th Nov, 2009 Paul S said:

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

I have a SC12 setup and a kit from Aus got mine from the US ebay site.

Not as good as an intercooler setup but it depends how much power you want? I'm happy

I run a supercharger and I don't care the TB is on the wrong side.
VEMS + 12 PSI + Liquid Intercooler = Small Bore FUN!

Gr4h4m, have you got any links to info on the kit you bought? I've seen pics of your car which looks nice and neat but I dont know if I will be able to find the SC12 chager. It came from the 4AGZE, didn't it?

On 12th Nov, 2009 Paul S said:

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

yep I have a build thread on miniaddicts.co.uk just search for SC12.

I go the kit from ben92 you can PM him from miniaddicts or try ausmini.com and search for SC12.

I run a supercharger and I don't care the TB is on the wrong side.
VEMS + 12 PSI + Liquid Intercooler = Small Bore FUN!

Right, I'm not sure what to do. Finding a suitable superchager over here will be a right pain. AFAIK te M24 is used on the Golf GT. I'm sure they are less than abundant in scrap yards so getting one would be difficult. The SC12 would probably be very rare aswell since all the drifters want to supercharge thier 4AGE corollas. I think sourcing parts for a T2 build woud be easier and I am starting to get pressed for time with this build. If I want to go the T2 route, what parts will I need?
Turbo
Exhaust manifold (metro turbo or mirage)
Fixings and pipework for turbo oil and water supply
Induction pipework and plenum

I have a Weber DCD carb which I initially wanted to use on this buid but would it be easier to use a HIF44 carb with a forced induction applicatin?

On 12th Nov, 2009 Paul S said:

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

Hi,
Go with the SU, it's been done so many times any problems should be easy to solve.
A turbo one would be the best, but I think you could use an N/A if pushed?
I'd go for the Mirage setup as you don't have to modify the bulkhead, so it's a bolt on job :)
Cheers,
Gavin :)

VEMs Authorised Installer / Re-seller. K head kits now available!

WB/EGT gauges. Click here for customers write-up

Visit www.doyouneedabrain.co.uk

My Mini build diary

TURBO :lol Good day gar Nice to see you made the jump here Encase anyone is wondering it was fellow who introduced me to the sight

Hey Paul! I now have a wanted topic for turbo bits. I didnt take much convincing :lol

On 12th Nov, 2009 Paul S said:

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

Well I was talking to the lads from Burlen and Turbodynamics today while in work. It would cost €275 ex VAT for a turbo HIF44 to my specs. I might be able to stretch to that but it would take 6 weeks! I think I'll continue to trawl ebay.
Then the blokes from turbodynamics said there were 9 variations of T2. What sort of T2 should I be looking for? Is there a more specific model code? They were recommending a GT25 series turbo as they said it would probably be a better size. Is the T2 definately the best turbo for my needs?

On 12th Nov, 2009 Paul S said:

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

http://cgi.ebay.co.uk/turbo-charger-suit-m...9447409QQihZ004

Can anybody identify this turbo? I'm guessing its a T2 but I'm still a bit useless at identifying turbos :$

On 12th Nov, 2009 Paul S said:

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

Hi,
I've no idea what that fits!
Renault 5 GT is the one most use. There's a Nissan one and a Rover one which are T25s so a little bigger.
I'm running a GT1752 as are others on this site, a GT25 would probably only be good if you're looking for around 300 bananas on a 1275...
Cheers,
Gavin :)

VEMs Authorised Installer / Re-seller. K head kits now available!

WB/EGT gauges. Click here for customers write-up

Visit www.doyouneedabrain.co.uk

My Mini build diary

the carb conversion kits can be sourced from one of the board members. the how to can be found here as well.

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

http://aseriesmodifications.wordpress.com/