We did the swap to 37 lb inj.Can't get the truck to idle,would someone give some info?I have autotap & edit.Thanks

 

Have you adjusted the injector flow rate with LS1 edit? Are those injectors 37 pounds at 58psi, or 43ps1???

 

37lbs at 43psi,and when it is trying to idle,going from 200-900 rpm l trims peg out to 20, running along 50-60 mph they are at 0 or below.Yes we adjusted inj flow rate to 43.6 I'm pretty sure that was the #.I tried doing a search but didn't have much luck. Thanks

 

Well, those injectors should flow 49.3 pounds at our pressure. Do a search in the PCM section on those fuel injectors.

At idle you may see a bigger difference in the ltrims than at a higher rpm.

 

i didn't end up with a flow rate anywhere near what was calculated, i just kept adjusting my flow rate till my part throttle ltrims get in the (+5) - (-10) range. seems like my idle ltrims ended up around 10 off too, cant remember if it was positve or negative though. if you can get your part throttle ltrims a little negative and your idle ltrims so it isn't peged then you are ready to start working on your WOT adjustments.

 

TIRBRNR what kind of injectors are those?
BigTex how do you convert from what an injector that is rated at 43.5psi should run at 58ps1?

 

Here is an online calculator to figure out what an injector will be at a new fuel pressure.

<a href="http://www.smokemup.com/auto_math/fuel_injector_pressure_change.php" target="_blank"><font color="red">http://www.smokemup.com/auto_math/fu...ure_change.php<!--color--></font></a>

I think you may have to register now to use it. It's a nice calculator and there are other useful things there so it's worth registering.

If you don't want to register you can go here also.

<a href="http://www.rceng.com/technical.htm#WORKSHEET" target="_blank"><font color="red">http://www.rceng.com/technical.htm#WORKSHEET<!--color--></font></a>

The third bluish box down from the top of the page has the formula.

 

Thanks XLR8NSS

 

They are svo injectors,and they are easy to install if you can solder.Did some more tuning yesterday runs out real good,idles great.We are going to Walker DynoTune to see how much the injectors helped,before we do the aftercooler.Thanks for all the info,it really helped.