I just had my car dyno-tuned yesterday - 328 HP, 330 Tq at 8psi. Things are leaning out pretty fast after 5000 RPM. I have the injectors that came with the Greddy kit (440cc) and, I think, others have used them successfully up to 400 hp. The Ultimate is tuned to provide max fuel, but it isn't getting to the engine.

What do need to do to get more fuel in there?

 

Walbro 255 fuel pump.

 

^ +1

 

^^+2

 

^^^+3

No use having those 440's if you can't get the fuel to them. I have run my car to over 12psi with A/F still at 11.0 with the 440's and a stage 1 return kit. It made 405whp at 8psi.

 

+4 on the Walbro.

 

Wow, 4 out of 5 agree - Walbro it is.

 

^+5

 

OK, where do I get it for the best deal?

 

http://www.forgedperformance.com/sto...8&cat=0&page=1

I'm pretty sure Sharif ships to Canada

 

Thanks - the order is in.

 

Walbro and bigger injectors

 

Larger injectors are not needed for ~400wheel. A good idea but not needed.

 

what about running 750CC injectors?
I can't lean out the fuel on my Build right now
A/F is always at 10.4 to 11.0 @ idle

 

new injectors won't do anything without a fuel pump to supply enough fuel for them

btw, your's A/F at IDLE is 10.4 - 11.0? You should be at ~14.7. Even under boost, that's PIG rich and only done in the very high rpm for safety. Who's doing your tuning?