Its been a long time since i posted here. I am still working on my 408w project, some things came up and i had to put it on hold for a while. anyway, i am back at it and need to know what size throttle body and injectors i should get. its a supercharged 408 stroker incase you guys forgot. i have 42lb injectors and a 75mm throttle body from my 331 stroker but i am not sure if it will cut it on the 408w.

 

I have 42# and an 80mm TB on mine, so you should be alright. 42# is good to about 600+hp and depending on your setup, the 75 should be perfect for it, I just went to the 80 just to be sure I had enough flow

 

With the supercharger you will need more injector. The throttle body should be as big as the manifold will allow.

 

i would go with a bigger throttle body if its in the budget, dont you have a R box intake? is it the 90 or 75 opening?

 

It has the 90mm opening. Thanks for the advise guys.