hi all I have an 89T2 witha 91 T2 motor, it has an Apexi piggy back on the ecu , running Racingbeat 3" turboback complete exhaust (minus cats) with HKS intake, Now i want more boost, what is the easiest simplest bolt on turbine that I can purchase for more boost, or is there any turbine splines i can relace in stock housing than can produce more boost? i was told that i could keep the rear housing of stock turbo, swap front part with a bigger housing that will accomodate a bigger splined turbine but no one can produce part numbers or brands.Im already running quite rich so all i need to do is feed more air. can someone help me?

thx,Spiky

 

Take a look at the BNR hybrids.

You'll need upgraded injectors and fuel pump at the least. When you start to get into the higher stages (stage 3 and above) it is standalone territory.

 

+1 for BNR

http://bnrturbos.com/2ndGen.htm will give you more information on the different stages, depending on what sort of fuel set up / numbers you're looking for.