Planning for new injectors

[ziembic]

I currently have stock injectors, and duty cycle is 128%. I have searched and found that stock injectors are 30 lb/hr, so I am guessing that 35 or 40 lb/hr will do. I have a bunch of stuff done to the truck, including bigger turbo, code 59 (finally getting close to running correctly) and a bunch of other stuff. My problem is that I have not tuned under Boost yet. I am afraid to make much boost until I can keep up with the fuel. My question is, if I over size the injectors, will this cause me a problem? I am considering METH down the road, but not immediately unless someone convinces me otherwise. I am thinking about going for somewhere in the 40's or 50's just so that I have enough fuel down the road. What do the SYTY god's and goddesses think?
Thanks

 

[MikeRenz]

Re: Planning for new injectors

i'd much rather have too big of an injector running at a lower dc than too small of an injector maxing out. I have 75# in my truck, and i'm sure i'll never see over 90% (if it ever runs, that is)

 

[JSM]

Re: Planning for new injectors

60/65's tune well, don't require ecm mods and will support 90% of syty builds.

 

[NecroWolf]

Re: Planning for new injectors

meth will extend the hp range of the stock injectors, i'm just not sure if it would be enough for that

 

[SCWolverine]

Re: Planning for new injectors

Build? Fuel pressure? AFR? Wouldn't hurt to upgrade for "down the road" purposes, but I'd put a lot more stock in WB readings than a calculated duty cycle, especially if you're just trying to get a base tune / see where you really stand at this point. If you change them out, be a sheep (follow the herd, no reason to blaze your own trail when there's proven base tunes for a decent number of injectors over on $59).

 

[BoostedSUV]

Re: Planning for new injectors

I'm running 50#er's with the mods listed in my Signature and running 96% cycle duty at 18psi. I wish I went with 75's because like Renz said, too much is better than not enough. You can always have injectors that are "too big" and not need to use them but you can't make your "not big enough" injectors do anymore that they can max.