Working on putting a 02 lq9 into an 03 RCSB truck that has a 4.8 in it currently. The setup will be stock bottom end 6.0 with LS3 heads, L92 intake/injectors, and the cam will be 222/230 .597/.600" 114LSA +2. planning to make around 450, hopefully more (through an auto). lol

What are the limits of the stock fuel pump? Also, will the stock l92 injectors be enough to fuel this setup?

 

If you expect to make 450rwhp then yes you will need a pump. The walbro 255 F20000169 is a good in tank pump that requires minor mods to the fuel bucket to work.

 

We offer a Racetronix in-tank upgrade kit just for this that includes the Walbro 255

Texas Speed and Performance - Racetronix In-Tank Fuel Pump Upgrade Kit

 

Thanks guys!

Another question that was brought up...Will L92 injectors plug right into the stock harness or are adapters are needed?

 

i may end up getting one of these... im pretty sure im getting close if not already there with my mods.

 

You will need to get adapters or splice in the correct connector.

 

Would you be so kind as to link me to the correct ones?

 

Planning on making an order soon if I hear back about what adapters I need to use... I did some research and think I need the minimeter to uscar adapters, but want to make sure that's correct before I order.

 

I bought a fuel pump assembly from Racetronix. All I had to do was replace the whole assembly. Didn't have to mod the bucket at all.
I'm using the marine 8.1L 42# injectors. Plugs right in.
Are you wanting 450 at the crank or at the wheels? To the wheels might be pushing it a little.

 

Pretty sure 450 rwhp won't be too hard to hit with a cammed 6.0 and LS3 heads. The cam specs above have hit 517 rwhp with a t56, LS3 heads, and a car intake. Don't think the truck intake will be that far off. Obviously expecting different numbers since the truck has an auto and a different intake.