Fast Toys Performance Parts

iTrader: (3)

Any ideas on how to get a more accurate range in the PE table?

How can you make changest to small range of RPM than what is segmented in the table.

Any sway to smooth this out?

Any help or thoughts appreciated!

ringram

Custom OS from efilive fully commanded table by rpm and map is your best bet.

The PE table is automatically interpolated from the adjacent cells by the pcm as are most/all of the other tables IIRC.

Billiumss

iTrader: (11)

Set your PE table to what you want, ~ 1.13. Then you can tune the MAF table with a WB O2.

2002_Z28_Six_Speed

iTrader: (19)

True. In respect with RPM it has the same resolution as the PE table.

Perhaps the MAF table might have more resolution if you thought about what the frequencies would be in terms of WOT. I have yet to try lying in the MAF table though. It might be more customizable then VE or PE. VE and PE having the same resolution.

Fast Toys Performance Parts

iTrader: (3)

That sounds like a good idea but wouldn't it mess up the LTFT's at WOT and prevent them from being zero?

Obviously EFI live is much more customizable by the sounds of it. I wish LS1 Edit has smaller ranges in their PE table. It would make life much easier.

Anyone else have a solution that will work in LS1 Edit?

2xLS1

iTrader: (25)

Be more specific about the problem you are having and why you think you need more resolution in that table because you shouldn't.

slow

iTrader: (7)

you set the pe to your commanded airfuel ratio, and forget it, until you want to fine tune it for optimal torque.



Ryan

Fast Toys Performance Parts

iTrader: (3)

As an example, when you are doing your WOT tuning on a dyno with a wide band, you might find a dip in the A/F ratio at say 5000 RPM. LS1 edit might have a entry in the PE table for 4800 and 5200 but chaning either might screw up the ideal A/F ratio you already have at 4800 or 5200. What do you do to correct the problem in between the values? I know the computer does smoothing on the values in between but you still have to screw something up to correct the in between figure do you not?

chevyls10

iTrader: (2)

using your example of 4800 and 5200, how different are you values between those cells? I know these aren't the values you are using but my point is working around the resolution problem. Make sure there isn't a huge difference between the different PE numbers if any then go back in the ve table and smooth it out as well. Since the PE is just a multiplier your ve table can get some more work to make the PE do what you want it to do

Billiumss

iTrader: (11)

Sounds like you need to set your PE to what you want to command and then tune the MAF table for WOT. You will get a really flat AFR.

slow

iTrader: (7)

you don't "tune" the PE table to get the airfuel correct (this may have been common practice in 2002-3)

you set it to your desired lambda (well, equilivence ratio) and then tune the airflow to get the fueling correct.

Ryan

Fast Toys Performance Parts

iTrader: (3)

So are you setting the PE to your commanded A/F ratio and then using the MAF table to get the actual A/F to what you want it to be? Are you doing that off MAF frequency in your scans?

Billiumss

iTrader: (11)

Yes, while using your WB o2 plugged into your scanning software you log MAF AFR error & MAF freq for part throttle and WOT.

Get on Hptuners.com and check out some stickys....

Ryne @ CMS

iTrader: (10)

but he has ls1edit, not hptuners

slow

iTrader: (7)

unless it is a custom operating system, ls1edit, hptuners, tunercat, sct, efi live, all modify the same gm tables, so the theory is the same.

Ryan