Ive noticed this new addition to the software for IVT AFR weighing coefficient. Does anybody know the impact of these tables
Ive noticed this new addition to the software for IVT AFR weighing coefficient. Does anybody know the impact of these tables
06 Grand Prix GXP, LS4-full bolt ons, Tuned by me
It's to help with scaling when cheating the stoich afr table. I've been begging for a while... And HPT delivered.
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Cut the IVT term in half when you double the stoich.
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2007 Corvette C6 Vert. A6
LME LS402, Pat G custom cam, ATI 10% OD Damper
Circle D triple disc 2600, 3.42 Diff
YSI, 3.0 pulley, ID 1000's
Alky Control Meth,
ARH 1 7/8 headers,
1009 RWHP @ 7000, 817 RWT @ 6000
IVT affects open loop fueling and transients. When you scale with the stoich method, IVT becomes artificially high. Cutting this value back down fixes the IVT model.
IVT is a calculated value based on multiple things. The value added is the coefficient for the commanded AFR term. If commanded AFR is double what it actually is, then the coefficient should be half.
DSX Tuning - Authorized HP Tuners Dealer
http://www.dsxtuning.com
http://www.facebook.com/dsx.tuning
Just say no to bull s***.
IF YOU WANT HELP, POST A FILE!
2007 Corvette C6 Vert. A6
LME LS402, Pat G custom cam, ATI 10% OD Damper
Circle D triple disc 2600, 3.42 Diff
YSI, 3.0 pulley, ID 1000's
Alky Control Meth,
ARH 1 7/8 headers,
1009 RWHP @ 7000, 817 RWT @ 6000
No.
DSX Tuning - Authorized HP Tuners Dealer
http://www.dsxtuning.com
http://www.facebook.com/dsx.tuning
Just say no to bull s***.
IF YOU WANT HELP, POST A FILE!
Just to update.... I cut the IVT terms in half as Dave suggests. Nothing else changed in the tune. Although my car was running great before, it seems to be just a touch better mostly during the first few minutes of a cold start. Could be placebo effect but I am happy with it.
Thanks for the info Dave
2007 Corvette C6 Vert. A6
LME LS402, Pat G custom cam, ATI 10% OD Damper
Circle D triple disc 2600, 3.42 Diff
YSI, 3.0 pulley, ID 1000's
Alky Control Meth,
ARH 1 7/8 headers,
1009 RWHP @ 7000, 817 RWT @ 6000
Also made the changes and definitely notice a difference. Mainly when taking off from a complete stop, just feels smoother.
Daniel
Pontiac G8 GT
Last edited by kllrvet; 11-07-2015 at 05:56 AM.
Just cut it in half if you've doubled the stoich AFR / cut IFR in half. It's not absolutely required, but does help with intake valve temp calculations which otherwise go overly high with the higher stoich / lower IFR combinations for whatever reason.
Post a log and tune if you want help
VCM Suite V3+ GETTING STARTED THREADS / HOW TO's
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CPX Tuning
2005 Corvette, M6
ECS 1500 Supercharger
AlkyControl Meth, Monster LT1-S Twin, NT05R's
ID1000's, 220/240, .598/.598, 118 from Cam Motion
2007 Escalade, A6
Stock
Should the IVT terms be changed when scaling a tune manually (using a factor on all air and fuel values)? I have manually scaled all of the air and fuel values in my tune and things work pretty well with the exception of transient fueling (which I know is hard in and of itself). However, I noticed that all of the transient fueling table include IVT terms. My IVT averages about 115-125C (pretty stable as well) while cruising so am I in the right ballpark or should I be adjusting the IVT terms?
How is that calculated? Mine have been logged consistently in the 330 F range - 165 C.
Edit - did some searching and many people are reporting normal IVT to be in the ~300's F range.
Last edited by dankmac; 02-28-2017 at 03:43 PM.
Nope - having a senior brainfart moment Was thinking of injector tip temp... Will clear my last post
Last edited by GHuggins; 02-28-2017 at 03:13 PM.
2010 Vette Stock Bottom LS3 - LS2 APS Twin Turbo Kit, Trick Flow Heads and Custom Cam - 12psi - 714rwhp and 820rwtq / 100hp Nitrous Shot starting at 3000 rpms - 948rwhp and 1044rwtq still on 93
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