Is is possible to have "too big" of an injector with a proper tune?

I'm installing heads, cam with all the intake and exhaust mods and expecting 380 RWHP. My calculations say 36# injectors should work fine. Can someone confirm?

Next year I'll be saving up for a supercharger which will require lots of mods. I'd like to target 500 RWHP at that time. If so, the 36# injectors would be too small. So, I calculate 42# injectors for that or higher, can someone confirm?

Would it be a bad idea to just buy the larger injectors and program them for the N/A set up. Then later have that same injector combo to be tuned for the SC set up.

 

I don't have personal experience but in theory it should work. I'm not sure if there are limits on the pulse width in the computer though. It could worry me that the pulse would have to be so short that it may cause problems. I rolled 360 rwhp on the stock injectors. Maybe pick up some cheap used ford svo 30 lbs and get the nice ones later.

 

The only problem with a "too big injector" is whether the PCM drivers have the ability to reduce the pulse widths to the very short times necessary to allow the engine to idle smoothly and efficiently. The stock LT1 PCM has demonstrated an ability to operate 42 #/HR injectors with no problems. Some people have pushed it further, but 42 #/HR is a demonstrated "safe" point.

 

Ok, so it seems viable that the 42# injectors should be fine with good programming at 380 RWHP. Then, I can reprogram later after I put on a supercharger with the same injectors.

I was concerned with the spray pattern at a low cycle.

I was on the www.racetronix.com website and noticed the disc versus pintle injectors. It seems that disc may be the way to go with the LT1. What do you think?

 

a friend of mine is running a set of 60# dekas on his procharged 383 i was amazed at how well it idled. it did take some tweaking of the base pulse width and batt voltage vs injector pulse rate thou.