help vortec 350 tbi programming

**Fast355** · 03-09-2014

Originally Posted by 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:

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.

**tamperedchevy** · 03-12-2014

Alright, got my blm around 110-130, got some fine tuning still but was wondering, when should I do AE? And what do I move to next? Spark tables? Maybe can I get a list of things to do in order. That could help other noobs like myself. Like when to do AE, PE or when to do spark tables and I guess hiway lean cruise would be last?

And I'll throw a log and some blm data up here in a couple days so I can get a few more eyes on it for approval to make me feel better lol

**tamperedchevy** · 03-16-2014

Haven't got around to a log yet but my blm are around 117 for the neutral idle 135 for gear idle and between 122-130 for all other driving. I'd say that's nice.

**EagleMark** · 03-16-2014

It is and no reason to go nuts trying to get numbers absolute! They will just change with weather, temp, humidity etc... The magic of EFI working it's wonders...

You can dial it in further if you want but won't notice a difference. It's well within the ballpark, actually infield! When fueling is that close the only thing I like to do is visually check VE fueling table for smoothness. Then a final data log in case the smoothing was out of line somewhere?

Smoothing does not have to end up perfect. But it should not have any big dips, spikes etc... remember the number in the cell is interpolated with all surrounding numbers to come up with what ECM finally uses. These old ECM are slow enough that I don't want it to have to work real hard at math.

Have you seen this?
http://www.gearhead-efi.com/Fuel-Inj...E2-Fuel-Tables

**tamperedchevy** · 03-16-2014

They looked good yesterday but I gave em one last adjustment now they look great! And yes I did see that post and added them together. Lows are 30's high is 92 on the VE.

**tamperedchevy** · 03-16-2014

Looking at the two AE tables on this thread at the second post, Dave has two tables up. His AE-tps table his goes to 50 percent tps mine only goe to 25 percent. If I used his tables as a starting point do I use his numbers up to the 25 percent tps-usec?

http://www.gearhead-efi.com/Fuel-Inj...=tables+vortec

**tamperedchevy** · 03-16-2014

Is there any good AE threads out there?

**tamperedchevy** · 03-17-2014

i used the map and tps AE tables dave w posted in the second here http://www.gearhead-efi.com/Fuel-Inj...=tables+vortec and it made my hesitation better. right after i did althought it ran better it died once when i put it in gear.

**tamperedchevy** · 03-18-2014

going back to VE tables. i had big ve spikes to keep my idle in the right spot. and with a huge upward spike and a huge lower spike and it was still rick in neutral and lean in gear. so i redid the tables. man are they annoying. if i do a run and correct the table it just turns into a spike pit. maybe it was a bad day to drive. I want a carburator. could my spark tables be messing with me. Im not sure whrn i should tune this

accidently deleted log so ill make another tomorrow
can anyone see if this bins spark looks weird.

**EagleMark** · 03-18-2014

Your spark advance table does not look weird. But IMO that's way to much spark for your engine in a truck and if you add up spark, PE and adders you've got about 40* at WOT? But not enough spark advance at idle and the area you flattened probably does not match where your idling with that cam. Need to see a data log to check this and other things.

In your first post you had a Custom Starter Chip, shouldn't they be helping you?

Need at least another 100 RPM for idle for now.

Also said no EGR? The EGR patch is not done and I don't think it's off the way you set it up?.

There's a mistake in your MAP AE.

Also several Parameters for an engine build like this need some adjustment and I'm not sure why you changed some things?

Let's see a data log to see how your really doing!