Max Boost On Stock Injectors?

[MUZT3K]

Hi guys, im just wanting to know whats the max boost i can run on my stock injectors being (safe) atm its running 14psi fine...but i just want that little bit more without pushing it to the limit. thanks

[HEKT1K]

have you got a tune yet James? Most people reckon around 220-230rwkw is about the max for injectors... how that relates to boost levels depends on what turbo you have

[MUZT3K]

getting it tuned this thursday, thats why i want to know wot the injectors are good for so i can up the boost abit

[TTT]

if you are getting it tuned, wouldn't your "tunable" ecu have a reading for injector duty cycle?

also, what turbo?

14psi on a larger turbo will require more fuel than 14psi on the stock turbo.

[boostn0199]

Tell us exactly what you have in your setup so we can tell you if its worth getting new injectors for example if you dont have a z32 even if you do upgrade injectors the afm will still max out and dw about what your gona boost it up to the tuner will take care of that and stop at where it is safe and then tell you if you got room to go more you need to upgrade this and that.

[MUZT3K]

set up is

Highflowed turbo

gredy profec boost controller

split fire coil packs

walbro 450hp fuel pump

ngk iriway spark plugs

3in turbo back exhaust

stock ecu but getting the power fc put in thursday and tuned.

currently set at 12psi but it does somtimes spike and hold 14psi on cold nights

so im guessing by what your saying manni 14psi is the max with that set up i have?

and also what figures roughly would i be expecting with the tune

[TiTAN]

just tell the tuner to tune it to as much boost as a safe injector duty/AFR will allow.

[Harey]

set up is

Highflowed turbo

gredy profec boost controller

split fire coil packs

walbro 450hp fuel pump

ngk iriway spark plugs

3in turbo back exhaust

stock ecu but getting the power fc put in thursday and tuned.

currently set at 12psi but it does somtimes spike and hold 14psi on cold nights

so im guessing by what your saying manni 14psi is the max with that set up i have?

and also what figures roughly would i be expecting with the tune

What are the specs of the hiflow turbo? Is it a GCG one?

As said above, the stock fuel injectors will max out around 220-230rwkw. Do you want more than that? If so, yes get some larger injectors and a Z32 afm. If you are happy with 220rwkw then you should be fine as is. Most hiflows I know of will make more than 220rwkw. The other way (bit dodgy) is to get a nismo fuel pressure reg to increase the fuel pressure to get more out of the stock injectors, but I wouldnt recommend that because you will still need a z32 afm anyway.

How upset would you be if your tuner says I could only tune on 12psi but the turbo is happy to make more? The answer to that is the answer to your problem. Remember 12psi untuned will be very different to 12psi tuned.

[MUZT3K]

thanks for the info..its made me understand things abit better now...i guess after the tune im going to have to save for some good injectors n a z32 then retune it. and im not sure what high flow it is..all i know is i got it done from hyper gear, gcg doesnt ring a bell but aparently this one is good for around 250kw-270 from memory

[Harey]

thanks for the info..its made me understand things abit better now...i guess after the tune im going to have to save for some good injectors n a z32 then retune it. and im not sure what high flow it is..all i know is i got it done from hyper gear, gcg doesnt ring a bell but aparently this one is good for around 250kw-270 from memory

Cool, as said above just get the tuner to do what he can with the current fuel system and afm. That will keep you happy for a while then see if you want more later. Only thing is if you do it all at once, you only need to get one tune. but if you dont have the cash, you dont have the cash.

[tavstar34]

About time u getting it tune james.

I thought u gonna get it remap..

get the z32 and then tune it at once.

[MUZT3K]

damit tav...was hoping u didnt know till i ripped u down the straight

[Sheng]

Your pfc will tell you everything.