99ChargedFRC

iTrader: (1)

I am working on tuning my 99 Corvette and have a half resolution secondary VE table. When I am making adjustments my secondary VE there is no change to the Primary. Now when I enable the MAF it will go back to the Primary. How do I make the adjustment to the Primary? Can I paste the Secondary in the lines accordingly and smooth? I am confused. ---gotta love the mullet, business in the front, party in the back.

jimmyblue

iTrader: (11)

This is an ideal job for a simple Excel sheet, build a Primary off
the Secondary by interpolating between the lines. Probably are
some out there, I built my own for messing with some dude's
'00 car once but have no idea what I called it or where I put it.
Might check out some of the tuning spreadsheets floating around,
at least one is liable to have this in them I expect.

Frost

iTrader: (45)

Is this just a vette thing?? I recently did a 99 F-bod VE/MAF Cal and worked off of the primary VE and it was definitely being used with the MAF failed out...

Edit..... 99 with a 1-bar OS doh!

foff667

iTrader: (2)

nope, all LS1's with a secondary use the secondary VE table while in SD mode.

Rays C5

Ok I have to ask...my 98 vet I've been tuning using the primary ve table exclusively and to my understanding the secondary is used for maf failure only. I this correct? Not to high jack but need confirmation. thanks

2000c-5

That's right, but when you tune, you are in OLSD mode, which is a MAF failure. If you are making changes to the Primary VE, you won't notice any changes in fueling at all, unless you were to go back to CL.

txhorns281

iTrader: (12)

Sorta...

VE is still used in closed loop. It is referenced simply when the MAF fails, non OL or CL dependent. If you have a secondary table, that is what it used in SD mode. The primary then becomes the balance check during MAF mode. It's still important to get them both right.

As jimmyblue said, build your secondary and interpolate for the missing MAP rows to build the master. The net effect will be the exact same since thats what your PCM does anyway.

2000c-5

That's right, my bad.

AllThrottle4U

iTrader: (14)

You can still see the data in the primary ve table even if you are using secondary values. Why not just update the primary then copy the certain rows over to the secondary. I think redhardsupra has an excel sheet for this, or someone does. This way you're getting full resolution for when you set your maf to work instead of "guessing".

foff667

iTrader: (2)

http://www.thetuningdoctor.com/Excel...0VE%20calc.xls

My90Iroc

iTrader: (26)

How are you logging your data? The histograms in HP Tuners use the resolution of the primary table. I just log the histograms and make the changes to the primary table and then copy the appropriate rows to the secondary table. That way once you're happy with your SD tune you renable your maf and your primary is all set.

foff667

iTrader: (2)

you can also opt to make a custom histogram referencing the secondary table.

JimMueller

iTrader: (9)

Why not paste the histogram changes directly to the primary table, and copy the appropriate rows to the secondary? Then you don't need to worry about interpolation.

2000c-5

You can do it this way, I think most people do, but while tuning, you are in SD mode, which uses the secondary VE. At the same time, you are making changes to the Primary VE, which you won't use until you re-enable the MAF. Some say it is more accurate to make changes to the table that you are actually using at the time.

99ChargedFRC

iTrader: (1)

How does this work? I input my secondary in but nothing happened.

txhorns281

iTrader: (12)

I'd say that's the best way to do it... Or do as foff has suggested, create a new histo, it's pretty simple

foff667

iTrader: (2)

insert your primary into the top table

the bottom table is your new secondary.

99ChargedFRC

iTrader: (1)

That doesnt help me at all. I have the secondary, I need the primary. I tuned the secondary and now I need to create the same table just full resolution.

Country Boy

iTrader: (24)

Thats the way I do it, but what theyre saying is that unless you copy it over everytime you make a change, you wont see the changes take effect. I log enough data (about 2 hrs driving), make the changes to the main VE table, smooth it out by hand, then copy the needed lines to the secondary table.

Frost

iTrader: (45)

+1 I don't see what the big deal is....

make the changes to the primary, move the lines to the secondary, rinse and repeat.