drive2fast

I have an 06 convertable with an aps twin turbo system built in 2007. It has a voltage booster to get the stock fuel pump to deliver more pressure and voloum but it is not doing the job. I dynoed at 625 hp at crank and i think i need bigger injectors and either an intank high voloum pump or should i keep the stock pump and add an external booter pump. what injector cc, pump and fuel rail would you suggest to get to the 700 crank hp. thanks for any advice.

schpenxel

Have you put a fuel pressure sensor on it to see if fuel pressure is dropping?

If you don't mind spending some money I'd go with ID850 or ID1000 injectors and ECS's stage 1 fuel system personally.

Unreal

ECS stage 1 or similar is best easiest upgrade. Other than that you can do a z06/walbro 450 in tank with a BAP and hit 700 wheel, or spend the money and do a fore dual/triple setup.

Actually easiest way would be add a meth kit and just use meth as fuel but that has downsides.

neverstop

another vote for ECS stage 1

ID injectors are awesome but if on a budget I don't have any complaints with the Siemens 80lb injectors in my car although I'm running at the limit of them ~700whp+

DSOMC6

I have the same TT set-up (APS) on an LS2/A6 in addition to having siemens injectors, cam, and APS exhaust.

I have zero issues running the original oem fuel pump with a KB bap making 620whp as well as many others running the same set-up.

The only fueling issue I have had in over 7 years of daily driving the car is the oem wiring at the fuse block which can be remedied by adding the racetronix harness. I did have another brand of bap fail once, but after switching to the KB it has been flawless.

You do not need $1k fuel system upgrade at your power level. However if you are running oem injectors you do need to upgrade those and re-tune.

drive2fast

sounds like the way i will go thanks for all the advice.