Im having problems with my VE Tables no matter what I change it does not seem to make a big difference in the way my engine runs. I have had my Lower VE table in the 30 to 90 range and it rus the same as it does in the 8 - 30 range. Im not sure what is going on here. 383 CI, 730 ecm, Mild cam. The Learn is enabled and it is closed loop when the data is recorded. I have been using VEphd when trying to tune these and it seems that I am chading my tail. I can usually smell gas when it is running. My o2 sensor reads anywhere between 0 and 900 mv Its pretty spuratic when it is running. At idle the map sensor reads about 30kpa. Im not sure where to go from here.

 

Sounds like you have some sort of none ecm problem fighting you. For 30 K/Pa at idle means a really really mild cam.

Pull the plugs and see what they look like. And make sure the tune parts are good. Then vacuum leaks etc, etc..

 

206 intake 210 exhaust @ .050
Plugs are a little black. Fuel pressure set at 48 psi No vacum. 24lb SVO injectors. Did a complete Tune Up Including a new ignition system and still no change.

 

I have had pretty good sucess with VeMaster (its on Craig's site)
Its good for doing the under 2500 rpm VEs to get BLMs to be 124/130 range. You have to use a DataMaster log file for it to work. I didn't see if you are using an $8D mask, that's what it work with.
Just do a light cruise and stay out of highway mode and PE/AE and it does the trick. The printout text file is nice for reviewing the changes too.
You need to be sure you recalculated the injector constant correctly for the injectors ans fuel pressure you have also.

 

Yep...I think your fuel pressure is too high for those injectors. You must set the pressure according to specs for those inj. Thats what I have learned here on DIY.

 

How do you calculate the injector constant?
What should the Fuel pressure be

 

Damn...I knew you'd ask that. Lets' see...I believe you just put in 24#'s for the injector constant. The program will round it off. As far as fuel pressure for the inj. it depends on what brand. Accel, SVO's etc. You can find out from probably doing a search here or check the manufacturers web sites. Sorry if that doesnt help much. Someone else chime in plz.

 

The Constant is set to 24. I will try lowering the Fuel pressure I could not find anything in the search.

 

I dont believe you should have more than 36-40 on the pressure but I could be wrong.

 

Kirk's successor sounds about right on the FP with your mods.

I'm running Holley 24's at standard pressure on my 400+ HP 383 SuperRam setup.

 

You can run higher pressure than stock but you need to adjust the injector constant to reflect that.
I'm learning the hard way that increasing the fuel pressure can simulate bigger injectors, but has its downside when something isn't right and limp mode takes over. The basic fueling does not shorten the PW to account for the increased fuel pressure.

 

Thanks for helping me out there guys...I wasn't sure if I was giving bad advice or not.