Upgrade Guide for R33 Gtst

[oldmangana]

how ya doin fellas...

i just bought a 95 R33 Gtst

The engine is pretty much stock except the turbo smat BOV,full 3.5 inch exhaust, GTR intercooler which is front mounted and HKS pod filter.

its currently running 4psi

id like to know what you guyz rekon my next upgrade steps should be ... if possible rough price estimate ...

also with my current setup how much boost yous think my engine could run comfortably ....

Thanx

[Suspense]

how come it is only running 4psi? normally should be 7psi..

[Nozila]

that excatly what i was going to say. YOu must have a bleed valve of some sort,restrictive mods or inaccurate gauges to have 4 psi. im curious if the car pulls hard?

With your current set up and the fact that its a 95 model as oppose to 96+ models, im sure that it can handle 10 - 12 psi tops.

But these advice have been mentioned before, do a search and you will be amazed.

[paulr33]

the standard actuator is 5psi, so its sits just under +5 on the stock boost guage.

the stock guage is in mmhg not psi. +7 on the guage is 14psi. for next mods you should check out a piggyback computer and a boost controller or a full ecu replacement.

check out

apexi safc - fuel piggyback

hks evc - boost controller

blitz sbc - boost controller

apexi powerfc - full ecu

greddy emanage - full ecu

have a look at some of those products, theres an apexi powerfc faq under tutorials which will cover a lot of the questions youll have regarding aftermarket ecu's

[pinoi_boi_r33]

greddy emanage is not a full ecu it is a piggy back. Do a search mate this has been done to death.

[|PRESA|]

personally mate, I'm on the same road as you and have the same mods.

Go get yourself a turbosmart bleed valve $100 and open it up so around 10psi (safe) or if you want that little bit more than 12psi. I don't recommend going over 12psi with standard turbo.

Now I've noticed running 10psi with FMIC and exhaust that the mixtures are quite rich and it doesn't rev out cleanly, so my next option is going to be a apexi PFC (around $1100 from nengun) only because I look to fit a bigger turbo in time.

Otherwise if your not looking to be going for bigger mods I would just get yourself a Apexi SAFC which will ONLY adjust your air/fuel mixtures and that would set you back around $450 for the unit and another $200 or so for a tune on the dyno.

Now that you have the adjustable a/f ratio you can go for things like a bigger Air flow meter and large fuel pump etc. Pumping more fuel and allowing more air into the engine as well as still being able to tune the mixtures perfectly.

So yeah thats my 2cents, but if I was you I'd definately start with a bleed valve and you will definately notice quite a bit of bang for you buck.