VE table for a supercharged LS1
Thread Starter
TECH Fanatic
iTrader: (1)
Joined: Oct 2003
Posts: 1,066
Likes: 1
From: Zurich - Switzerland
VE table for a supercharged LS1 Who would share his supercharged (measured!) VE tables with me?
I checked my stock VE tables using the NOGO equation (https://ls1tech.com/forums/pcm-diagnostics-tuning/149741-ve-table-cracked.html)
Not bad at all! Now I decided to repeat the measurement after installing a 6 PSI Vortech supercharger. My other mod are LT’s.
Vortech supplied a programmer with a so called tune. The VE tables are exactly the same as the stock 98 program, which is know to be a little wrong (the 02 values are much more accurate).
The measured VE are between 15 and 20% higher than what Vortech provided, this on every spot of the table! Is it possible? I guess yes because this is the goal of supercharging an engine
The NOGO equation is based on the reading of a healthy MAF, is it possible that the Vortech set up results in a wrong air flow measurement?
Did Vortech made their homeworks? Or am I misunderstanding something?
Fact is that I have KR exactly in the spots with the biggest VE difference…
My MAF is stock, LTFT are OK.
The IAT has been relocated after the blower, the MAF is still before it. Is this the source of the difference? Shouldn’t, but hey! I‘m not an expert.
Thanks!
Stefano
I checked my stock VE tables using the NOGO equation (https://ls1tech.com/forums/pcm-diagnostics-tuning/149741-ve-table-cracked.html)
Not bad at all! Now I decided to repeat the measurement after installing a 6 PSI Vortech supercharger. My other mod are LT’s.
Vortech supplied a programmer with a so called tune. The VE tables are exactly the same as the stock 98 program, which is know to be a little wrong (the 02 values are much more accurate).
The measured VE are between 15 and 20% higher than what Vortech provided, this on every spot of the table! Is it possible? I guess yes because this is the goal of supercharging an engine
The NOGO equation is based on the reading of a healthy MAF, is it possible that the Vortech set up results in a wrong air flow measurement?
Did Vortech made their homeworks? Or am I misunderstanding something?
Fact is that I have KR exactly in the spots with the biggest VE difference…
My MAF is stock, LTFT are OK.
The IAT has been relocated after the blower, the MAF is still before it. Is this the source of the difference? Shouldn’t, but hey! I‘m not an expert.
Thanks!
Stefano
Thread Starter
TECH Fanatic
iTrader: (1)
Joined: Oct 2003
Posts: 1,066
Likes: 1
From: Zurich - Switzerland
Have you made some measurements? I've seen some .LS1 files used in supercharged cars and some of them had a modified VE table, but I still don't know if this is necessary or not.
Or if my MAF is reading something strange.
Or if my MAF is reading something strange.
It is not necessary to change the VE table for a blower setup.Taking time to setup the injector table and minor MA adjustments will put you extremely close on the VE table.
Thread Starter
TECH Fanatic
iTrader: (1)
Joined: Oct 2003
Posts: 1,066
Likes: 1
From: Zurich - Switzerland
I'll measure the VE without the belt: I should be able to see if the increase I saw it's because of the blower or because of the new MAF location.
Today I increased the whole VE main table of 10%, just to see...
I got KR all over the RPM vs MAP table! I had to stop after few miles to put it back
This is strange: increasing the VE values the PCM should inject more fuel, at least during fast load changes... KR occours if you go lean, not rich !!!
Or am I missing something?
Today I increased the whole VE main table of 10%, just to see...
I got KR all over the RPM vs MAP table! I had to stop after few miles to put it back
This is strange: increasing the VE values the PCM should inject more fuel, at least during fast load changes... KR occours if you go lean, not rich !!!
Or am I missing something?
