Modding My 98s1 Rs4

[Mickya]

I have a 98 s1 rs4 stagea and have decided to do afew mods with the money from K Rudd and what i have in my account.

it's an rb25, non neo with no work done as yet.

so i have decided to get a 3inch turbo back exhaust and front mount and then tune once these are on.

my mate suggested to put on a bigger turbo, am i able put this on a stock engine without hurting and having to strengthen it?

what other mods are there that aren't too costly that'll still give me more POWER!

any help appreciated, cheers,

Mick

[RBPOWA-(TJ)]

Auto or manual ?

[Mickya]

auto

[KiwiRS4T]

Spend some time reading through this forum before parting with your cash.

If you have the money for a bigger turbo then you can make sure your 3in system is compatible with it. The front mount will help with a bigger turbo (won't give any power gain otherwise). You won't be able to "tune" the engine with the stock ecu so if you have the money you should get a Vipec/Link ecu. With less money you could get an Apexi SITC and SAFC.

Your ten year old fuel pump could struggle to keep up so as insurance you should get a new, better pump (e.g. Walbro or Bosch). An electronic boost controller ( I recommend the Jaycar IEBC but there are others) will help build an maintain boost.

By now you should be looking to upgrade your suspension and brakes - its all in this forum in the DIY and other threads.

How much power can your stock engine take? Seems to depend partly on how you treat it but all of the above should be OK at around 220 - 250AWKW depending on which turbo you go with and the quality of the tune.

[RBPOWA-(TJ)]

being auto shit kit should be on your list

[_Ryan_]

shift kit

alignment bushes(i wouldnt do shocks/springs til the stock shocks die)

TBE with highflow cat

S2/R34 SMIC

EBC(or bypass stock solenoid)

SAFC or ECU

Racebrakes RB74 or Endless SSS pads

i wouldnt bother with a turbo until all of the above are done

[southern_tango]

As told before ,if you are going to change turbo check comp with the dump pipe ,high flow metal cat converter is a must as high flow panel filter or pod filter...after that EBC so maybe you can get up to 14-16 psi depending turbo(don't try it with the stock one) + SAFC to control fuel air.

After that for sure you will atrt thinking about handling and braking ,herre you can go two ways first as Ryan said endless pads +braided lines or second change to R33 (or R34) rotors and calipers( you can allways go with brembos ...but pricy) and maybe upgrade sway bars for some whiteline ones

You will find lots of ideas in this forum,so check around and save yourself some headhaches (or just ask there'll be somebody happy to answer and help)

Good luck and have fun...

[_Ryan_]

  southern_tango said:

As told before ,if you are going to change turbo check comp with the dump pipe ,high flow metal cat converter is a must as high flow panel filter or pod filter...after that EBC so maybe you can get up to 14-16 psi depending turbo(don't try it with the stock one) + SAFC to control fuel air.

After that for sure you will atrt thinking about handling and braking ,herre you can go two ways first as Ryan said endless pads +braided lines or second change to R33 (or R34) rotors and calipers( you can allways go with brembos ...but pricy) and maybe upgrade sway bars for some whiteline ones

You will find lots of ideas in this forum,so check around and save yourself some headhaches (or just ask there'll be somebody happy to answer and help)

Good luck and have fun...

my car stops on a dime... once there is heat in the pads, you feel like time is slowing!

come for a spin before changing calipers, unless you are just doing it for ease of pad/rotor choice, but i doubt R33 calipers will fit under s1 stockie rims

[BensDR30]

Don't forget a trans cooler upgrade and also bigger sway-bars (I'm looking at getting Selby ones shortly).

[KiwiRS4T]

If you're short of money (who isn't) the best value for your suspension dollar (if your shocks are not absolutely shot) is the heavier rear sway bar (24mm solid).

[Mickya]

thanks all for your help. much appreciated.

now another question, in what order (if any) shall i do these mods?

cheers, Mick.

[RBPOWA-(TJ)]

any order you want ...

want power first ?

want handling first ? stagea's handle great stock, but can always use some extra tweeking

but cooling should be the next step once the box is working harder, due to engine mod's or yourself just trashing it

[66yostagea]

R34 smic with air scoop, cold air deflector, hi flow panel filter. Thats what I have on my auto. With JJ bellmouth dump X Force cat and 3'' cat back with new resonator and 3" cannon. Power increase is quite noticeable and the bottom end will stand it.

BTW big Kev's money wont pay for all of it.

[southern_tango]

  66yostagea said:

BTW big Kev's money wont pay for all of it.

That's tue,sad but true, and things are going even worst,looks like like all import stuff is about to go up in price...so Mickya mind your mods because you need some balance on them,simple power upgrades like hi flow filter (maybe smic/fmic)+ exhaust(dumpy+cat+catback) is one thing,but changing turbo and make it work perfect involves ecu re-tune + bigger fuel pump + inyector +etc ,is another +++labor on top(except you do it your self...)so good luck in your project...

[Mickya]

yeh krudd will not cover this, but i have abit stored away in my piggy bank and my dad is a mechanic, although this area isn't his forte he will (hopefully) be able to help out in the labor department. cheers guys

  southern_tango said:

That's tue,sad but true, and things are going even worst,looks like like all import stuff is about to go up in price...so Mickya mind your mods because you need some balance on them,simple power upgrades like hi flow filter (maybe smic/fmic)+ exhaust(dumpy+cat+catback) is one thing,but changing turbo and make it work perfect involves ecu re-tune + bigger fuel pump + inyector +etc ,is another +++labor on top(except you do it your self...)so good luck in your project...

[_Ryan_]

  Ryan1600 said:

shift kit

alignment bushes(i wouldnt do shocks/springs til the stock shocks die)

TBE with highflow cat

S2/R34 SMIC

EBC(or bypass stock solenoid)

SAFC or ECU

Racebrakes RB74 or Endless SSS pads

i wouldnt bother with a turbo until all of the above are done

also a turbotech EBC from ebay is an alternative to an EBC too... 40AUD from ebay

I would follow my list , i did(roughly) (my exhaust is JJR bellmouth dump, JJR catco cat, and a custom catback- its legal and seems to flow fine)

[southern_tango]

  Mickya said:

yeh krudd will not cover this, but i have abit stored away in my piggy bank and my dad is a mechanic, although this area isn't his forte he will (hopefully) be able to help out in the labor department. cheers guys

No,problem you have all the hardware/parts change cover now... (it's like any other car,for a mechanic)

[66yostagea]

  southern_tango said:

No,problem you have all the hardware/parts change cover now... (it's like any other car,for a mechanic)

Except when you have to remove/replace turbo. You need fingers like forceps and a pack of bandaids.LOL