PDA

View Full Version : Help on Picking a turbo and wastgate



Truebird sc
09-26-2009, 09:11 PM
:confused:Im building my Thunderbird SC so far i stoke the block from a 3.8 to 4.2 and bored it .030 over. Now my question is to does who have done this upgrades on their SC. What turbo size should i go for gt35, gt45, or master power t70 also what size wastegate should i go with?

Hock
09-26-2009, 09:45 PM
Are you going just straight turbo or are you trying to compound supercharge?

super red91
09-26-2009, 09:55 PM
I have a T4 GT35R on mine, spool is excellent and can support 500rwhp with some room to spare. Since you have a 4.2 instead of a 3.8 you could run a little bigger turbo like something in the 67mm range. You will definitely want a 44mm wastegate.

What #'s are you looking for? Track car or street car? Auto or standard? Race fuel or pump gas?

Truebird sc
09-26-2009, 10:45 PM
Are you going just straight turbo or are you trying to compound supercharge?

straight turbo

Truebird sc
09-26-2009, 10:47 PM
I have a T4 GT35R on mine, spool is excellent and can support 500rwhp with some room to spare. Since you have a 4.2 instead of a 3.8 you could run a little bigger turbo like something in the 67mm range. You will definitely want a 44mm wastegate.

What #'s are you looking for? Track car or street car? Auto or standard? Race fuel or pump gas?

10 sec , both track and street car , 5 speed race fuel all the time