I tried looking for this some time ago.they are rated at 39psi. They are a popular swap for the GM Multecs found in the LT-5 motor. They run fine as is, just trying to tweak and get cal as close as possible. Typical tuner's addiction!

 

Your IAT is unplugged...

We just went through this, emails and phone calls to Accell. They say it's not needed and they don't have them... just bolt them in any car and they are fine.

 

This article from Moates may help.

http://support.moates.net/theory-an-injector-model/

 

Actually, that's an MAT in the throttle body. I have an IAT in the radiator shroud that is not visible. Been playing around w getting that right also. Seems like when motor has been run, it gets a little ragged. Overall, very smooth however.

My understanding is that these injectors are actually Lucas. They're rated at 21# @ 39psi. The LT-5 runs on 47-50psi FP w twin fuel pumps.
I ran into that Accel wall too like they never heard of what I was asking or for what purpose.