help vortec 350 tbi programming

[tamperedchevy]

I have an 89 chevy 1500 350 gmail goodwrench engine
With these upgrades:
-vortec heads 185cc runners 2.02 valves
-Comp cams nostalgia 211/218exh. Duration@.50
420/426int lift
-Trick flow chromoly 7.75" pushrods
-Scorpion narrow body 1.5 full roller rockers
-Longtube headers to 2.5 duals,x-over, no cats
-Extreme EFI 50mm TBI
-Dual plane high rise air gap intake(summit)
-New stock injectors with 18psi
-3 wire o2 sensor
-No egr
-Custom starter chip

I have moates stand alone software to burn, tunerpro to adjust and winaldl to log. Burn2 unit and g2 adapter to use the better chips.

My idle BLM is 80. From 90 to115 while driving. And I have a bad hesitation after it warms up but only from a low rpm or stopped throttle smash. 21" vacuum but the cam is only .20 over stock(does this sound good?) no vacuum leaks unless it's in the brake booster.

I lowered my BPW by 30 and in Egr. From.71 to. 52 off someone's recommendation. It didn't do much of anything is there somewhere else to adjust this. Where should I go from here?

Timing is at 4* advanced with that spark wire unplugged
I've read lots online on this but after weeks learning and days logging and programming I figure I need to figure this out. So here I am

[EagleMark]

Sounds like you have a good start on equipment!

What ECM/PCM? Mask ID?

No reason to run ancient WinALDL when you already have TunerPro RT, it will do a more detailed data log.

Not sure who told you to change BPW in EGR? You don't even have EGR? Make sure you have disabled the EGR properly in the bin because there is no data in $42 to tell if it's on or off... but still changes fuel and spark when it thinks it's on.

First thing I'd do is search the site for the Vortec Head timing tables Dave W did for us in a spreadsheet and get it in your bin. With that and maybe a few more degrees at idle area, you don't need the extra 4* at distributor.

Here's a greaqt writeup on how to adjust your fueling from BLM data.
http://www.gearhead-efi.com/Fuel-Inj...E2-Fuel-Tables

21" of vacuum is great at idle! The hesitation is due to the Vortec headsw as well, will get better with proper advance but still needs sometimes 200% more AE to get rid of the hesitation when accelerating.

That should get you going...

[tamperedchevy]

7747 $42
So is the're only one place adjust bpw? It was 135 I dropped.it down to 108 using the spreadsheet calc. Dave w.
And I have the spreadsheet for blm ve table corrections. Is it time for that. I don't like my idle having 80 for blm. Thought I should. Fix this b4 I move to ve corrections.

[tamperedchevy]

Good thread link. I forgot about that one. I've read so Many.
Ok. This is my game plan
I'll add my ve2 to ve1 put them 30-95 then go for a long log tomorrow and adjust my blm with the VE corrections spreadsheet add them in smooth out my table and go for another long log. Sound good? It's on unless it doesn't sound good

[EagleMark]

Yes there is only one setting for the BPW/BPC in $42. It's calcualted by fuel pressure and injectro size.

There's a lot of controversy on it's use in tuning and can be fudged a bit. But it is a set it and forget it calibration number that goes into the bin and is now part of the fueling calculation.

A lower number does come out to be leaner.

Here's a recent quote:

Everything you've read and stated is true. But you can set up a stock 5.7L to run 22 PSI with these calculations and it will run just the same, no added fuel? When BPW/BPC number gets lower it will fire Sync fueling to higher RPM without going static/100% IDC. Like BPW of 135 goes static at about 3600 RPM.., this is why Cop Cars had bigger injectors and lower BPW... but with a WB on it's still getting enough fuel to keep AFR to 5000 RPM because it goes Async fueling and the calculation changes.

Want my secret information for tuning with higher pressure after I learned and figured out all this stuff? Just raise pressure, leave settings alone and you will have more fuel available and tune VE!

http://www.gearhead-efi.com/Fuel-Inj...-fuel-pressure

[Fast355]

Yes there is only one setting for the BPW/BPC in $42. It's calcualted by fuel pressure and injectro size.

There's a lot of controversy on it's use in tuning and can be fudged a bit. But it is a set it and forget it calibration number that goes into the bin and is now part of the fueling calculation.

A lower number does come out to be leaner.

Here's a recent quote:


http://www.gearhead-efi.com/Fuel-Inj...-fuel-pressure

Actually if you are using EGR there is a whole table for BPC in $42.

That being said I would set the ignition timing at the distributor to 10* BTDC and set the initial constant in the .bin to 10* BTDC. This will help a cammed/vortec head engine start easier and run better if it ever goes into limp home mode.