With how nicely behaved injectors are these days there is no reason besides cost to not going bigger than you think you will need to begin with.

 

Imma join in here... I'm running 83# injectors at ls pressure and iv hit 90% at 12 psi and 5900 rpm shifts. When I put my new big turbo on I know I'm going to add a good bit of fuel in the VE table. So Im sure its going to go well over 100% should I worry too much as long as afr stays in check? Running do10 and 14 meth nozzles currently.

 

depends how you want to use the meth....for iat control or as another fuel source...

If you want to use it as a fuel source you can take the flow rate of your nozzles, convert to lbs per hour for the percentage of methanol you are using, then divide that number by 8 and add it to your injectors and that will be your "total fuel amount"

 

Lots o boost needs big ole squiters.

Skinnyman is runnin my old 73# injectors and he is maxed out on 15.5 psi.

Ill be seeing 15psi so i need some big injectors.

How much boost you plan on runnin?

 

Anyone look into getting factory injectors resized? Theres a guy in Missouri thatll resize, rebuild and flow the stock injectors to any size you need for 230 bucks.

 

Honestly i have no idea i am a boost virgin. Probably start out at 7 then 12 then 15.

 

Then 20. Then 25. Haha. New motor. Stop at 15 again.
Go big.

 

interesting... contact info? pm if ya'd like

 

i would send the injectors to FIC, they can restack the plates to make them bigger, its around $200 bucks. also when going over 80% the issue is the injectors get hot, they dont have enought time to cool, the injector window is only so big, but you can go way over 100%, ive seen almost 200% on a few cars. they are just staying open longer, which makes heat and they dont have time time to cool. 100% injector duty doesnt mean they are spraying fuel 100% of the time, its 100% of the alocated time window

drag racing wont kill them but is you road raced or something they would cook the driver in the pcm. i personally ran a set at 120% for over 3 years, they only hit that at redline for a short time, then it would shift to the next gear.

hope this helps

 

These are Bosch EV14s from FIC.. i gotta send them back when i have time a swap them for the big 95 or 105s.. which ever are the biggest he has for the same money..