I am building a fuel injected 393w stroker motor. I have the motor completed now questioning if I should go with the 90mm or 75mm upper intake from TFS. Which will answer the question for throttle body size. Also thinking about going either 36 or 42lb injectors. Below are my numbers. I am looking for a street/strip engine.

Compression: 10-1
Heads: Pro-Comp 190cc
Cam: Compcams #K35-522-8

 

Desktop Dyno says the combo will make about 360hp at 5000rpm which only requires 30lb injectors and probably a 75mm TB.

 

Where can i get a bigger TB?

 

Summit Racing sells a few models for manifolds designed for the Windsor style engines.

 

will i have to change anything if i go with a bigger TB?

 

The TFS intakes are designed for these larger throttlebodies so you're OK there, but they often require a different style throttle cable like the one found on the Lightning.

 

Also get a matching EGR plate. Make sure the TB opening is no bigger than the manifold opening, or it will have little additional effect due to air flow disruptions at the interface.