i am going to install the 272/272 cams. all i have now is turbo back and EBC. will i need to upgrade the injectors?

 

injectors will be required when you upgrade your turbo.. till then I thought the stock injectors were pretty big.

 

you dont need to change injectors until you upgrade your turbo. Good luck

 

Not true. You need to upgrade your injectors when the duty cycle is sbove 95%. With a stock turbo, cams and basic bolt on mods will get you to the point that you need injectors if you are running high boost.

 

I agree with EvoTech. A Buschur Stage 3 set up will push the stock injectors over 95% duty cycle. You might be able to upgrade the fuel pump to get by but you'll need a reflash and if you're gonna get a reflash you might as well reflash for a new set of injectors. That's my opinion anyway. FWIW, the Buschur Stage 4 with 680s will run IDCs in the 70-75% range.

 

a set of 680 or 720's will never hurt to have...

 

How do you know when a 95% duty cycle has been surpassed... I ask cause I am getting a custom Dynoflashnext month and I will get injectors before if I need to, does it seem necessary with the mods listed in my signature?

 

In one word, NO.

 

thanks for the opinions. so far i am setting up my car for autox events. still looking for a way that i can afford the setup and finish all the necessary parts first.

 

sorry to hijack the thread but since i am a newbie what size are the stock injectors?

 

stock injector is 550cc

 

And my BR Stg 4 with WR sees duty cycles in the 85-86% range with 660s on 93. Add race gas and more boost and the injectors are definitely required.

 

thanks guys. what about fuel pump? i see most of you who have cams upgraded have fuel pump upgraded too

 

Definitely do a fuel pump with cams.

 

Throw in some alchohol/meth and you can get a lot more power while keeping the stock injectors.....