I am trying to buy a turbo and piece things together. any help will do. My goal is 450-500 whp. turbo of choice is GT30R with full race exhaust manifold and 3"dp. The question is on the turbo turbine, it has .63, .82 and 1.06 A/R what does all these mean. For the wastegate, it is 38mm, 40mm and 44mm which one is the best for my application. The last one is I plan on driving it 15psi daily and the track 20-25 psi. which spring rate would I need to get for my wastegate. My engine management of choice are autronic or hondata. any info or feedback would be appreciated. Hlub29

 

read like the basic info on turbos and you will understand everything a lot more. I wouldnt get that setup until i knew wtf everything was at the very least.

 

If going with FR components, I recommend giving them a call and discussing your goals with them. The guys up there are very knowledgable.

 

full race

 

if you want daily driven at 15psi and race at 20-25psi...you will have to get a 1 bar(14.5 right) spring and a boost controller. whatever the psi is for that spring you choose will be the lowest you can adjust to on the boost controller.or u can just change out your springs in the wastegate all the time