L98 frustration with tune

[ClusterFunk]

Hey guys new to forum and hp tuners
after having my car tuned by one tuner taking almost 12mth with lack lust results i turned to a performance shop in the city closest to me (300km)
I'll attach a copy of the tune and log
the drivability being that bad around town it was useless
I'm having a go at it myself now and its 100% better but being new and not having the experience if someone could look over these tunes i'm concerned they may have overlooked something
I'm running this cam
l98 ve ss commodore
vcm 883
Duration 228/238
Lobe Separation @ 113
Valve Inlet .600"
Exhaust .603"

any help greatly appreciated

thanks guys

[Gustavo]

When cold starting up the car, do you get backfire through the intake ?

[ClusterFunk]

No backfire just coughs and splutters at low speed and takeoff just generally a pain to drive smoothly around town

[Gustavo]

Any specific reasons why you're on SD rather than MAF ?

[Gustavo]

This should fix your drivability issues.

esp original tune - Gustavo.hpt

[ClusterFunk]

maf is disabled and uncalibrated the hz feq where also zero values by tuner
vcm recommended a mafless tune
thankyou so much Gustavo
is it worth chasing the ve table values? i mean like is it going to create an issue somewhere i'm unaware of
ive currently got it running couple % rich pretty well across the stft now

[Gustavo]

maf is disabled and uncalibrated the hz feq where also zero values by tuner
vcm recommended a mafless tune
thankyou so much Gustavo
is it worth chasing the ve table values? i mean like is it going to create an issue somewhere i'm unaware of
ive currently got it running couple % rich pretty well across the stft now

No problem at all, and no it's not going to harm anything, I just wanted to ask. Let me know the results with the drivability.

All the best

[ClusterFunk]

The idle was way way better but was still loping at take off and when there was little to no load when decelerating slowing down also and had a little trouble with cold start was cranking for longer spluttered for a sec then fired up nicely
I've got it running pretty nice and the moment a lot better than it was thanks again for your help Gustavo

[GHuggins]

Thought I was the only one that failed MAFs with 0ed out MAF tables as a backup... Not to sound bad here, but as I'm sure your aware that tune needs a lot of work. You'll want to address injection timing, VE tuning (try to keep the table smooth and get as close as you can even in high load low rpm areas - go off of 02mv readings or afr readings for this - not the fuel trims) - as stated your probably fine to run MAF, you'll also want to address your timing tables and then your idle tables. This is all to smooth things out. You'll want to address your O2 settings after everything being said and done too for the different flowing air through the exhaust now too.

[ClusterFunk]

thankyou yes i'm aware it need alot of work i've never been happy with it
even with the basic tuning knowledge i have even i can see that tune is garbage
was from extreme street performance in Canberra A.C.T Aust they had the car twice for over a week each time dyno at 327kw
i've given up on local tuners figured if want it done right just going to have to learn to do it myself
yes i've ordered a wideband i got zero faith in that tune after seeing it myself
but i'm still only new to tuning the help is greatly appreciated thankyou GHuggins

[ClusterFunk]

i've got a bit of a noob question.
i have a twin exhaust system on my vehicle no x-pipe crossover also 100 cell cats and/but i also would like to setup my aem 30-0300 x-series wideband to also use for tuning on other vehicles
can i use a tailpipe probe to tune reliably enough with the cats or is it a must to install sensor pre cat ?