how do I find out how much HP 38.5# injectors will support?

 

Use the bottom calculator on this page http://www.fbody.com/calc.htm

It looks like just under 500 horse at 80% duty cycle. Of couse you will need to know for sure what fuel pressure those injectors are rated at vs. what pressure you're actually going to run. Use the rated injector pressure vs. what pressure you're running the injectors at to convert the size with this calculator here http://www.witchhunter.com/injectorcalc1.htm

 

so I think I am safe (if you would call it that) running a 200 shot. Dry of course. I'll just pull timing and fatten the PE each time I up the jet and keep an eye on the logs.

I am determened to hit a 12.9x in the bus. LOL Might as well try it now while there's a warranty. hehehe