N/A VE table values over 100?

[samh_08]

I've been dialing on my VE table and I am getting values over 100 when I am naturally aspirated. My mods are below..

Is this normal to have such a high VE table? My current VE table had 10% added from the original, but now has the sub 4400RPM/sub 65kPa range dialed in. Should you still blend cells when you have 200+ hit counts on that cell and the surrounding cells? For those looking at my tune, I am talking about the 40kPa/1600RPM cell.

MODS:
2005 Chevy LQ4 (10.65:1CR), Milled/ported 5.3L Heads 231/234 .643/.598 111 LSA cam, LT headers (no cats)

[SOMhaveit]

Not normal where you are getting those numbers.

You have 36lb injectors @ 3 bar? That's what your IFR table would indicate.

[samh_08]

I am getting them by autove. 43.5 psi is 3 bar right? The injectors I have flow 36lbs at 43.5psi and I have 58psi.

Do I still have wrong numbers?

[SOMhaveit]

The numbers you have are close enough for IFR if you actually have 36lb injectors @ 43.5. Are you certain you actually have 58 psi rail pressure? It almost looks like your injectors are not flowing as they should, so you are having to bump ve way up to get enough fuel.

Also, you're certain you have the MAF disabled?

[samh_08]

I will get fuel pressure tomorrow. I do not have a MAF at all and it is supposedly a custom operating system for speed density from Jessie @ Wait4Me. Is there something that would show if it is truly disabled?

[SOMhaveit]

If you don't have one it's disabled.

[joecar]

If you get any of the MAF DTC's then MAF is disabled and PCM has failed over to VE table.

VE table's real units are g*K/kPa rather than %, so over 100% may or may not be ok... post a pic of your BEN map, how big are your BEN's...?

[samh_08]

Here is a screenshot of my filtered BEN's after a 25 minute drive. Mind you these values are after 10% was added to the whole table..It just seems like a high table for my mods...

I also attached a screenshot of my current VE table.

[joecar]

It does seem high... maybe use half the trims to compute the VE fixer and start again...

I would start with a smaller than 10% initial increase.

Did you measure your fuel rail pressure...?

Is your B4001 IFR correct for your injectors...?

Does your FPR have a manifold reference hose...?
If it does then your B4001 IFR is incorrect.

[samh_08]

Would I have to manually calculate each BEN to only use half?

I am waiting on a FP gauge to check out my fuel pressure. When I initially checked I had 59psi at idle.

Yes B4001 is correct for my injectors (From what I understand) Flow matched LS2 injectors that are rated for 36lb at 43.5psi. Are my values right?

My FPR is a returnless filter/regulator from a 02 Corvette. I would assume that it is not referenced to manifold vaccum..?

Let me know your thoughts,
Thanks.

[joecar]

In your VE fixer/ben calc pid, divide the STFT's by 2...

you have something like this:
(STFT1 + STFT2)/2/100 + 1

change it to:
(STFT1 + STFT2)/4/100 + 1


Oh, you have returnless FPR, then yes your IFR looks correct for your injectors.

[samh_08]

Here is my calc_pids file that I modified exactly how this thread stated: http://forum.efilive.com/showthread.php?t=6318

I would assume that if Jes from wait4me came up with this and uses it, it must be the right formula's :confused:. Now that I look at it, it seems at though it would only use bank 1 STFTs, not both like your equation stated..?

[joecar]

You could change it from "{SAE.SHRTFT1}/100+1" to either of these:
"{SAE.SHRTFT1}/2/100+1"
"({SAE.SHRTFT1}+{SAE.SHRTFT2})/2/2/100+1"