porksoda

iTrader: (39)

Curious what injectors everyone is using on their TBSS intake swaps? I do have cam, intake, and exhaust. My 03 Silverado SS will be down a couple weeks as a tranny gets built for me by FLT so I figured now is a good time to go ahead and do the swap as well as send the PCM off for tuning. I want injectors that will fit the TBSS intake and fuel rail without spacers or anything and be able to tune for easily. I am willing to buy adapter pigtails if need be.

Flyingcat

iTrader: (20)

I plan on using FAST 33# LS2 length injectors....Understand easily tuned and lots of data on them....They are 2" in length I believe.....
I am staying NA, well we all say that, so they are good for my application....

jfuegner

iTrader: (4)

Porksoda I don't want to high jack your thread but I have the same question. My truck is a 2004 rcsb has a 6.0 swap, stock bottom, 243 heads with a mild P&P, 228r cam, CAI, long tubes, efans, 3000 stall, all the normal stuff. I am swaping my stock intake to the nnbs intake, its from a 2008 Silverado 5.3, already has rails and injectors. I know my old injectors will fit in the new rails, but do the nnbs injectors flow more #s. Is it worth it to run the nnbs injectors or run the old ones? My truck is already tuned for the current setup, I know I will need a retune after intake swap. Just want to know if the new injectors are any better.

Soooo

6.0 with 243s 228r cam all boltons.
NNBS intake swap injector choice.
Run stock old injectors?
Use the NNBS injectors?
What adapter harness will work?
Will I be safe to drive with the swap until the retune?

porksoda

iTrader: (39)

I ended up going with the non marine 8.1 injectors. Hopefully they are easy to tune. Anyone know if the hardware from the truck intake will work on the TBSS or do I need to buy TBSS hardware? Intake bolts, fuel rail bolts, and throttle body bolts.

2002_Z28_Six_Speed

iTrader: (20)

I would not use FAST injectors. They are basically stock GM injectors with a sticker on them.

I ordered FAST 46 lb injectors and what they gave me was a 33 lb stock LS2 injector sold for an UPCHARGE.

Sounds like a good way to blow up your ****, right?

gagliano7

I have the truck 8.1 injectors in my tbss intake on a 5.3 with 212/218 cam and prc 5.3 heads. They are plug and play and you just copy the injector data from a 8.1 motor. Very easy to do.

The fuel rail bolts and intake bolts are the same. The TBSS intake is a 4 bolt so you will need an adapter if you are using a 3 bolt throttle body. Fast makes one for around $40. You will need to use the fuel rail from the tbss which is a nicer piece anyways.

06 4.8

iTrader: (5)

For your mods, stock tbss 30lb ones will be fine. Which I happen to have a set for sale

GM_Devil

iTrader: (2)

yup, im running stock ls2 with my intake. WOT duty cycle never goes above 73%