Quote Originally Posted by the_jester View Post
well, I'm running 9 psi on the stock 21 lb in the silvy, but i know what you mean. damn it. that pulley is calling my name. well, if i get some 42's will the stock pump put out enough to run them? because i am getting LT's and ORY, and i know from the silvy that you have to richen it up after adding headers. so with 42's and headers will the stock pump still be up to it?

I was seeing 110-115% duty cycles on my stock 28# injectors at 10psi even with a 10:1 FMU. (With the 10:1 disk in it I've seen it peg my 100 psi fuel pressure gauge.) Probably the only thing that saved me from damaging something was the fact that I was spraying meth.

I now have 42# and they run about 80% duty cycle. I still have the FMU but dropped back to a 6:1 disk in it. It barely moves my fuel pressure now. I may see 65psi at full boost.

IMO you need at least 42# injectors.