twin turbos or single

[supraman149]

cheers for the help mate. i havnt actually got my car yet but towards the middle of the year i will be getting one. Im not actually sure how much psi to run. some people dont like to touch it and other people i have talked to have put the psi up. what would u reccomend for the size of a single turbo and how much would you run through yours. When im finished with it, it has to be able to beat a r32 gtr haha but i want a reliable every day car aswell

thanks

[pwpanas]

Originally Posted by supraman149

cheers for the help mate. i havnt actually got my car yet but towards the middle of the year i will be getting one. Im not actually sure how much psi to run. some people dont like to touch it and other people i have talked to have put the psi up. what would u reccomend for the size of a single turbo and how much would you run through yours. When im finished with it, it has to be able to beat a r32 gtr haha but i want a reliable every day car aswell

thanks

You run as much PSI as the fuel you're running will support. With 93 (R+M)/2 pump gas, that's about 16psi. Anything more will slowly damage your pistons (measurable via compression/leakdown test). With race fuel (eg C16, you can run 30psi or more).
To beat an R32, you'll need several mods, including wider tires, a fuel system with bigger injectors and multiple fuel pumps, a bigger turbo(s), and a fuel controller or aftermarket ecu. If you have an auto transmission on your Mkiv TT, you'll need to get that modded. With a 6spd, you'll need an aftermarket (eg. twin disk) clutch.