Thinking Of Upgrading My Turbo

[Sammie]

i know someone who might be selling a high flowed rb25 turbo which is rated at 500hp and can hold 30 psi, it has a 500hp cosworth steel wheel on it apprently its good im not sure, dont know much at all about turbos however its for 1700 bucks witha 50mm wastegate, is there amajor differnce between highflowed turbos and brand names turbos such as garrets,HKS etc thanks for the advice in advance

Sam

[R31Nismoid]

There potentially can be a lot of difference

HKS/Garrett etc. Have put a great deal of money and development.

Places like GCG also put time and development into thier hi-flow/hybrid turbos etc.

Some places however do not. They simple slap some wheels in either end with a housing and thats about it.

They dont perform nearly aswell as thier more expensive/reasearched/developed brothers and as such you'll never have as good performance.

How much performance? Thats up for debate on a case-by-case basis.

By the sound of the turbo you speak of, its been modified and have the internal wastegate removed, hence the need for an external gate.

Thats probably issue #1, you'll need a spacer plate, modified stock manifold, or a new manifold to be able to accomodate the EXT wategate, which for a street car/mild applications really is going too far, and its pointless added cost.

Problem #2... kinda comes back on yourself. You need to find out the exact wheel trims/housings etc etc of the turbo for the resident experts to be able to give some indiction of how it will perform

At face value, if someone is saying to you "its 500hp, good for 30psi" then its gonna be just some bucket of shit turbo thats gonna be either laggy, unresponsive or surge like crazy.

[Sammie]

cheers mate good info ill do more research the turbo was built by ATC in perth, il try get more info on it