ok before you blast me about not to do a turbo my self ....i know how to fab and im good with learning fast ....BUT i do not understand how you control boost is it through the wastegate,or blowoff valve....ok NOW i have a 94 z28 and i wanna put a turbo on it ....kinda like the RMT systems (ive heard the good and bad so please dont start)BUT what kind of turbo ,waste gate and blow-off valve should i need i need and is that all i need ( other than oil lines and maybe cooling lines) ok now i also have a 91 RS with the basically stock motor what kind of things should i need to make that a Twin Turbo ( i will not be RMTing the RS because of the TREMENDOUS lag i would get) any help will be appreciated again PLEASE DO NOT START A DEBATE ON THE GOOD AND BAD OF RMT's

 

boost is controlled by the wastgate... it allows exhuast to bypass the turbo exhaust wheel

blow off valve does exhuast what it says - blows off excess pressure, yes, can limit the amount of boost, but for the most part it is there to help prevent damge when a sudden throttle movement closed happens. it alowas the inertia pressue left from the turbo still spinning to bleed without pushing boost into a 0% throttle engine.

 

Wastegate - wastes exhaust gases past the turbine, to control how fast (and how much boost) you are spinning the turbo to make.

BOV - Fights compressor 'surge' - the condition of closing the throttle, the turbo is still trying to build more boost and push air against a closed throttle, and instead - the air forces itself past the compressor impeller - quick killer of turbo bearings.

What size motors are in each?

You need to know that, your goal as far as power, and how many rpms you intend to build power to. That's how you begin sizing the appropriate compressors.

As far as teh turbine side, it'll depend on where you mount it, and your power goals.

 

Wastegate - wastes exhaust gases past the turbine, to control how fast (and how much boost) you are spinning the turbo to make.

BOV - Fights compressor 'surge' - the condition of closing the throttle, the turbo is still trying to build more boost and push air against a closed throttle, and instead - the air forces itself past the compressor impeller - quick killer of turbo bearings.

For the LT1 - start in the T70 - T76 area for the compressors

For the 305 - start in the T61 to T70 area.

What is your goal as far as power, and how many rpms you intend to build power to? That's how you begin sizing the appropriate compressors.

As far as teh turbine side, it'll depend on where you mount it, and your power goals.

Damn double post.

 

This is good.

So compressor size depends on location. So what difference would say a T04E RMT mount and the same turbo engine bay mount have. Would you want a larger or smaller compressor for say the RMT mount?

 

same compressor, smaller turbine.