My truck is tuned for my 44lb injectors right now, i plan on upgrading to either 57lb or 60lb injectors soon. I asked my tuner if i could just change the injector flow rates with hptuners and he said that it would change my entire tune by doing that. Is that correct?

 

if he's saying that, then he tuned it with IFR, which is the wrong thing to do. if you do a proper VE tune, changing injectors causes no other changes than just making injector pulse widths smaller, as the bigger injectors dont need to spray as long to get the same amount of fuel in.

i'd just stay away from this 'tuner'

 

hmm, i didn't expect to hear that. He is one of the most respected tuners in the area. Thanks though

 

Redhardsupra knows his ****. You should be able to change IFR then tune VE as needed. I'm sure anyone here or hptuners would check your tune if you wanted to post or email.

 

What he's saying is that if your IFR table was correct when your vehicle was initially tuned, then changing the IFR table to match the new injectors should not have an effect on the rest of your tune, aka no need to tune VE table.

 

all you should have to do is change the IFR tables. That's all I did to run my 96#'ers

 

I also had to lower my min IPW. I tuned my VE table after the injector install. I was getting a rich decel issue, but that turned out to be the min IPW. Changes to the VE were minor.

Thunder, what kind of IDC are you running w/ that 408 & 96#'ers? I guess i really want to know when you get that turbo in.

 

You will need to get it tuned for the new injectors. No matter how it's tuned, you will need an update to tell the computer what it's doing. Otherwise you would be extremely rich.

 

I'm running about 35% right now N/A WOT at 6300 RPM

 

Listen to Supra, if youve got the software Id just do it yourself anyway