Merlin

Hey, I just got my HP Tuners software and had a question or two. I have unplugged my MAF and started the primary VE tuning, but I have heard that without the MAF the VCM switches to the secondary VE tables. Is this true or not and, if true, how do I go about making sure the VCM still uses the primary VE tables? And if it doesn't use the secondary VE table with the MAF unplugged, when does it ever use it?

BTW, this software is awesome. I am still a bit overwhelmed at all of the data that can be altered, but I am having a blast learning it.

P Mack

iTrader: (6)

With the maf unplugged or disabled the the vcm uses the secondary ve table, so you have to make sure you change the secondary when doing speed density tuning. Also, an easier way to make the vcm switch to speed density is to set the maf fail frequency to 0 under engine diagnostics>general instead of unplugging it.

horist

^^^ what he said

This is only for 2000 and earlier F-Body's FYI 01 and 02 only use the Primary VE table

WS6FirebirdTA00

iTrader: (33)

you can get the new hp tuners update for 49 bucks and it uses the primary table

Merlin

Thanks for the help all. So would it be better just to use the MAF when I am tuning the VE tables so I change the primary instead of the secondary? I would just paste over the secondary table with the primary values but I noticed that the primary table has more data due to smaller increments on the MAP axis. Here is the deal, I am not shooting for SD in the end, I just read that you tune the primary VE table first with the MAF disabled and after you get it tuned properly you enable the MAF and tune the MAF. This just seemed like the most logical order to do the tuning. Thanks again.

SSpdDmon

iTrader: (10)

Cliff notes:
Leave MAF plugged in...yes.
Tune with the MAF...no - disable by setting fail frequency to 0.
Tune primary VE table...no - copy Primary to secondary and tune secondary. Copy secondary to primary, hand smooth, and re-enable MAF.
**Log MAF Hz (freq.) and Dynamic Airflow while tuning VE to have data for MAF recalibration. See http://www.allmod.net/hpt/ for spreadsheet. OR search for soundengineer's spreadsheet that calibrates the MAF based on MAF Hz and learned fuel trims.

Merlin

Ok, thanks, that is the approach I am trying to use but I am unable to do a simple copy of my primary table to my secondary table as the primary table is larger so I was thinking I must be missing something somewhere. I will just edit out the lines I don't need for the secondary table. Thanks for the tips

horist

what I used to do is I'd just highlight the entire 20 MAP row, copy, paste into 20 on secondary
Then do same for 30,40, etc.... from Primary to Secondary took all of about 5 seconds

SSpdDmon

iTrader: (10)

...and I don't even have my tuning software yet. I've been reading too much. G/L with getting the bugs worked out.

Merlin

Yep, that is what I did - no problem to do but I just wanted to make sure I wasn't screwing something up. Thanks for the help, Horist.

Merlin

I have been wanting to get this software for a long time so I started reading a whole lot of stuff on tuning. But that was like 6 months ago and I have drank since then so now I am having to read everything again. Hope you get your software soon, it is badass

JRick212

iTrader: (6)

esplain this please???? I have HPTuners 1.7 Just got it like 2 weeks ago.

I have a 2000 which has both primary and secondary VE tables.
I have set MAF fail frequency to 0 and confirmed I have P0103
Then I did a whole bunch of logging.
I then took my histogram and modified the Primary VE table.
From this point I copied line by line 20,30,40,etc. to the Secondary VE table and smoothed the graph.

Am I going about this correctly?

Merlin

I believe that he is talking about the Speed Density upgrade you can get from HP Tuners for $49. If you get it, you can tune in SD mode and it will only use your Primary VE table so you don't have to jack around with the Secondary table. It is on one of their option pull down menus when you order.

As for doing it correctly, I think you would first copy your lines 20, 30, 40 etc. from your Primary VE and paste them into your Secondary VE - then do the logging and the smoothing. You would do it in this order since you want to tune your Primary table and you need to start out with the same values in both tables. It looks like the way you did it, you were tuning your Primary table based on your Secondary table values. But I wouldn't start over - since you now have basically the same values in both tables, just keep logging and smoothing the Primary and pasting it in the Secondary until you get what you want.