I just got flashed and was told not to use my bigger injectors right now. It would only cause problems with idle and driveability.

what is everyone's experience with this?

I figured since more boost needs more fuel, hence the walbro and injectors.

 

Yeah but bigger injectors need to be tuned....just cant slap them on there ya know.....thats why they cause issues...

 

With the mods you have now you're ok. If you're looking to go with a 20G in the future like your sig states, injectors are going to be needed however..

 

you need to be tuned. the whole idea of tuning is so your car knows what to do with those bigger injectors and fuel pump

 

You will need them for that 20g though...I am getting FIC 850cc injectors...with my stock turbo and injectors on pump gas I am at 95% IDC....ekk!

 

WTF! I'm so confused by this injector crap. I read the most information that I can get my hands on about whatever I am trying to learn about. i.e. injectors. Last I read was a thread where Ted B. commented about 680cc injectors would be the best for use with a 20G LT. Also, use the smallest injectors you can while meeting your maximum fuel needs. Someone else posted that stockers could actually be sufficient. Now, I'm reading that 720's are maxed on a stock turbo, and Alan678, is going to use 850's for a 20g LT. I understand that with an AEM you can pretty much do whatever you like, within reason, but what's the real scoop?!

 

Trust that Ted knows his stuff.

The stock injectors see around 90-95% duty for me, stock /w TBE @ 20psi. You can also help your duty cycle with a simple fuel pump.

 

Not without low FP or a poor tune.

650cc are fine for a 20G LT.

 

I just got tuned at dynoflash and they said dont use the injectors right now. I trust what there saying just want to see what people have done with there injectors.

 

don't use injectors for the stock turbo,
got a friend did a mail in flash by vishnu, and they told him to remove the injectors he upgraded, cuz the stockers the best way to go and for gain ! ,

 

It sounds like stock injectors it is for now, wait for that huge 20G

 

keep in mind that running overly rich will raise the Injector duty cycle significantly

for what it's worth, Buschur told me that with a 20G LT setup 680cc would be ideal for pump gas boost levels. However, 780cc would be ideal for someone that's going to run race gas boost levels.

I went ahead and put a walbro fuel pump in while I'm waiting for my exhaust, cams and injectors to get here and the car is significantly richer so I had to rework the tune. I'm not sure if the stock injectors will be sufficient for the cai, exhaust and cams though.