are upgraded injectors necessary for the JWT 530BB kit if I run it at between 6-7 psi?

I plan to get a tune and already have a walbro 255 but dont know if the injectors are necessary since I dont have high power goals.

 

*sigh*

 

Rather than starting three threads asking three turbo related questions, all in the same evening, why not just have one thread for all your questions?

It looks like you'e going to have a bunch of them

 

<a href="http://www.funnyforumpics.com"><img border="0" src="http://www.funnyforumpics.com/forums/this-thread-sucks/3/cowbell-784041.jpg"></a>

Careful my man... 3 F/I threads in 41 posts is a recipe for flaming.

 

the answe is yes, you must get new injectors

 

yea sorry i figure theyre all FI questions but different types. I only have low post count because im on gdriver. i dont own a Z but tech questions are usually better answered here. I figured new injectors would be necessary but just wanted to confirm since the 530bb kit doesnt come with injectors but rather uses the FMU and split second box and I know some people just use it like that.

 

600cc injectors without a fuel return, or >=440cc with a fuel return. Also get a real EMS. All the split second box will do is blow your engine in a split second.

 

I'm currently running +550whp with a JWT TT 700BB kit on the split second box. It has performed flawlessly; but is at the limit of it's capability. Plan to upgrade to a standalone when I have some $$$.

 

^ it's better to be lucky than good. no doubt.

If you haven't reflashed to maintain predictable timing, then you're playing with fire. If you have the ability to reflash to tune, then you don't really need the SS box. So...

 

I ran the 530bb kit (with 190lph fuel pump)with the FMU and SS box with no modifications to the car other than exhaust. It ran flawless and made aprox 400whp at 6.7psi on JWT base tune. So you do not need anything besides what the kit comes with. To go above 400whp injectors would be recommended as well as bigger fuel pump, return fuel system and ditch the SS box.

 

thanks guys its time to start part hunting.