First time n00b Calc.VET... check my data?

[RobNJTA]

Hi all, been lurking for a while, just installed a cam so its time for me to get to work with this. Thanks to joecar on my LS1tech thread, I was able to get started with the Calc.VET tuning. Car specs:

98 Trans Am, stock PCM
LQ4 6.0, stock heads/compression
LS6 intake, ported TB, stock 28lb injectors
GM ASA cam 226/236, .525 .525 110 LSA
T56 Trans, 3.73 12 bolt
Long tubes/no cats
Analog Wideband (Autometer, yeah I know, but it matches my other gauges and Im anal like that lol)

Ive been messing with this for 3 days now and haven't made much progress. I started off with the ASA base tune on tunefiledepot but its not very close. Ive followed the Calc.VET tutorial and Notes as closely as I could with the limited knowledge I have on the subject. I disabled what needed to be, did a log session for as long as I reasonably could trying to hit as many cells as I could. I was able to correct (or so I think) the maf table from the data, but the VE data still looks way off when pasting it into my tune. I tried smoothing it as best I could, but the car would barely run with that so I obviously did something wrong.

The cam idles pretty high and doesn't pull much vacuum (is there ANY way to get it to pull a bit more vacuum at idle?), so getting those lower cells isn't really working out too well. Im posting up my Calc.pids and a log file from this afternoon, if anyone could take a look at it and give me some pointers, it would be MUCH appreciated!

[joecar]

Hi Rob, welcome to the forum :cheers:

Post screenshots of your VE map and your MAF map.

[joecar]

These are the maps I get from your log file (using your calc_pids.txt):

VE calculation [g*K/kPa] (paste this into B0101):

17057

VE looks pretty good.


MAF correction [unitless] (multiply this into B5001):

17058

MAF looks like a large correction down low, smaller correction further up.

[joecar]

PE is not enabling adequately (should show up on GM.EQIRATIO whenever throttle is significantly open).

[joecar]

( BTW: you're only using 14 pid channels (out of 24 recommended max)... you could log a few more things like KR, SPARKADV and maybe GM.IBPW1/2)


Post your tune file.



Your cam is 226/236 110 +0 (zero advance)...?

[RobNJTA]

Thanks Joe, I'll post up everything as soon as I get home from work. The maf table I was able to copy/multiply and that seemed to go ok. It was the ve table that didnt at all match up with what is in my current tune.

So it's ok to use all 24 channels? Didn't want to bog anything down so I went with bare minimum.

Wideband wise, I think it's pretty close... as far as what efi live is reporting afr is pretty much dead on to what the gauge is reporting as well, so I think I at least got that going right.

Yes, 0 advance in the cam, installed dot to dot.

[RobNJTA]

Ok, here is the base tune Ive been using. Its not a stock tune, its mainly the tables from the Corvette ASA tune found on tunefiledepot added to my original modified stock tune. As you can see, when you paste the corrected VE table into the one on my current tune, its not even close. Maybe Im doing something wrong? Also, it runs really rough when first started and seems to have a noticeable miss, but when warmed up it idles lopey but reasonably nice and smooth.

[RobNJTA]

Anyone?

[statesman]

Your PE table {B3618} is set to lean out at higher RPMs... that's not a safe tune. I would suggest you set the AFR to somewhere in the low 12's for those higher RPM.

[RobNJTA]

Ok, I didn't even realize that, thank you. The stock one commands .80, the ASA one commands .91. I think Id like to shoot for around .85 I have a feeling I should have just built off of the stock tune I was using, as I really don't know what was done on this ASA tune I used.

Could I use the logged data I have for the MAF and VE tables and add them into the stock tune, or do I need to load the stock tune and re-log everything?

[statesman]

You can use your new MAF and VE tables in your stock tune as a base, but you'll still need to redo them later.

Because you now have a cam, stock values will need to be adjusted in Desired Idle Speeds {B4603}, Desired Airflow {B4307}, and maybe the idle area of your spark tables before you even start. Once you get it running on the stock tune, use DVT controls in the scantool to find a good spark value for your idle. Do a RAFIG to get the right idle airflow. Redo your MAF and VE tables. Then take it to a dyno to get your spark tables set right.

[RobNJTA]

Ive been messing with it and I just cant get the damn thing to idle decent. Way too rough, Ive read through all the tutorials and what not but its not working out for the better. I think Im pulling the cam this week for a smaller, more friendly one like I had originally wanted to go with. Ugh lol.

[statesman]

Ive been messing with it and I just cant get the damn thing to idle decent.

With a 110 LSA I'm not surprised.

[joecar]

Anyone?Rob, sorry it has been a busy week, I'm slowly catching up.

[RobNJTA]

No problem Joe, I appreciate all the help thus far. Cam is coming out, going with an LS6 cam for now, as I do plan on going turbo in the near future, I just figured I could have some fun with the ASA cam for the time beings, though I think it was a bit beyond my tuning capabilities at this time. :laugh:

What is nice though, is that throughout this ordeal I gained a lot of knowledge and can start tuning with the baby LS6 cam to get the most out of it, which should be a lot easier than the ASA. Ill start off with a calc.VET and go from there!

[joecar]

LS6 cam is easy to tune, has very good low end driveability, and does not peak over like the LS1 cam.

[RobNJTA]

Got it swapped out last night, 4 hours start to finish, everything went well! Went back to the stock-ish tune and it runs GREAT now. Wants to pull past 6500 where the stock cam was done by 6. Now that its all buttoned up, Ill start over with a fresh calc.vet and see what happens!

[joecar]

Good job :cheers:

Calc.VET is perfect for LS1->LS6 upgrade.