drain89

iTrader: (13)

My 416 will make around 550-575 but I'd like some wiggle room. Thanks. MSD or FAST 102 intake with LS2 style rails.

4U2NV-SS

iTrader: (21)

I ran 60# on my 418 and made 565 RWHP. with plenty of injector to go.

redbird555

iTrader: (14)

Ya I think anything over 50 lb/hr would be ideal. The lsa/ls9 injectors are rated at 56 and are fairly inexpensive on here used.

drain89

iTrader: (13)

It is my understanding that we can't use LS9 injectors. Especially on a cathedral port.

redbird555

iTrader: (14)

Who told you that? The ls9/lsa/ls3 injectors are all externally the same. They all work with any head setup. The intake is what the injectors mount in and the only way that causes problems is with height. You will need height adapters and electrical adapters to run those injectors. Depending on what height adapters you need they will be 50-80 bucks and the harness adapters run 15-20 bucks for a set

drain89

iTrader: (13)

Physically yes...but functionally no. From what I could find in the few posts I found in here and on the interweb it seems that they have a unique spray pattern and are also a tuning nightmare. What info have you found?

redbird555

iTrader: (14)

People use them on a variety of builds. The spray pattern may be different but its nothing a competent tuner cant handle with the dynamic control tables. There are many posts on hptuners that run them just fine.

http://www.hptuners.com/forum/showth...ons-for-an-LS7

http://www.hptuners.com/forum/showth...-LS9-injectors

http://www.hptuners.com/forum/showth...t-an-IFR-table

these are some i just pulled up on google.

drain89

iTrader: (13)

Everything I've seen seems to show a few guys arguing whether they will work or not. The reasons they list yay or nay are all in EFI tuner jargon that 95% of us including me don't understand.

redbird555

iTrader: (14)

well i just showed you a few threads with some of the top hptuners experts saying there are no problems. If i'm inclined to believe anyone its them. I prefer oem injectors as I know they were rated to go hundreds of thousands of miles with no issues not to mention they're very inexpensive in the world of aftermarket units.

at this point its up to you but i would not fear the ls9 injectors one bit. If your tuner knows what hes doing there wont be a problem. you can pm dstek on corvetteforum or hptuners forum he uses them regularly on all types of builds

drain89

iTrader: (13)

That's good to know. ShorTuning or BlueCat will be the tuner. They're the closest ones to me that I've heard good feedback on. I've also been eyeballing the Bosch 0280158117 which is also sold as the FRPP M-9593-G302 injector.
So I take it that spray pattern/angle isn't that important on a cathedral port?
I'm hoping I can get close to 600 at the wheels NA...but realistically I'll be somewhere between 550-580. Anything in the 52-60 lbs range at 58psi and will work in a FAST or MSD intake without spacers will work. I'll buy the appropriate fuel rails once I've found an injector. I'd like to stay with a newer style bosch injector. I'll consider the siemends/deka and the deatch werks since everything I've read on them is good; but only if I found a good deal on them used with low miles.

LSxPwrDZ

iTrader: (4)

I would just use some stock LS3/7 injectors unless you plan on running E85. I know 416's are high strung but if a heads/cam/intake 624rwhp NA LS7 can get by with stock injectors I'd say you'd be fine also!