Another tuning question... VE Tables
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From: Cheyenne, Wy
Another tuning question... VE Tables Ok, so I went from 30# SVO's and smaller heads/cam/displacement to 42# Injectors and a bigger setup. I switched the car into Speed Density mode via TunerCats and I was trying to use VEMaster for my VE Tables but it didnt change ANYTHING...My SD tune is WAAAYYYY off. The second I started the car my O2's went into the 1000 ranges and my BLM's sunk to 108 and sat there. I looked at the percentages and it was pulling 15.6% from both Left and right LTerms and 20% from both STerms at idle.
I Went into my Main VE Table and I changed the ranges from 50-70 kPa and 400-1200 rpms. I lowered them by 30% and the trims moved up to 117/130. I reverted back to the original VE Numbers, then took out 40% and the trims went to 132/145. I just reverted back and dropped the VE Numbers 38% and have not ran it yet.
My question is, do I need to lower the ENTIRE VE table by 35-40% or what?? I noticed when I was out road testing it that it was at 108 constantly on the BLM's...So I know they are rich as well.
I Went into my Main VE Table and I changed the ranges from 50-70 kPa and 400-1200 rpms. I lowered them by 30% and the trims moved up to 117/130. I reverted back to the original VE Numbers, then took out 40% and the trims went to 132/145. I just reverted back and dropped the VE Numbers 38% and have not ran it yet.
My question is, do I need to lower the ENTIRE VE table by 35-40% or what?? I noticed when I was out road testing it that it was at 108 constantly on the BLM's...So I know they are rich as well.
Although I have no experience with TunerCat.....if I'm understanding you correctly.....then yeah, your entire VE file needs to be tuned again. "Bigger setup", I'm assuming, means that you swapped heads/cam as well??
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Yes, I went from a 357 with LE2 Heads (2.00/1.56, 205cc) and a 220/226, .570/.565, 110 LSA on a 106 ICL and 30# SVO Injectors with a port matched intake.
I now have a 383 Stroker with TEA TrickFlow Heads (2.08/1.60, 220cc) and a 238/244, .592/.592, 111 LSA on a 107 ICL and 42# Injectors with a fully ported LE Intake Manifold. Those are the biggest changes not counting a few bolt-ons.
I now have a 383 Stroker with TEA TrickFlow Heads (2.08/1.60, 220cc) and a 238/244, .592/.592, 111 LSA on a 107 ICL and 42# Injectors with a fully ported LE Intake Manifold. Those are the biggest changes not counting a few bolt-ons.
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For Injector Flow Rate, I set it to the lb/hr rating of my injectors...42.00
I have not changed the offset voltage yet, or the short pulse adder. I lowered the Min. Pulse Width from 1.404 msec to 1.099 msec
I have not changed the offset voltage yet, or the short pulse adder. I lowered the Min. Pulse Width from 1.404 msec to 1.099 msec
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From: Cheyenne, Wy
Ok, so lower RPM's go down, upper RPM's go up...I will look into that.
I agree that injector info is key, I am still working on it but I am having trouble finding info on the offset voltage and on the short pulse adder that gives me enough to actually make changes I am comfortable with, therefore I have not changed anything.
The car is running but I always tune in Speed Density first, then move into CL with the MAF on. I need to get the Open Loop AFR Tables right, but first I need to get the VE tables dialed in. They needed a 38% decrease to get my fuel trims REMOTELY close at idle in SD mode...I am going to start driving her and see if I can get the other RPM's dialed in a little closer.
AIf anyone has any good information regarding Offset Voltage please let me know!
I agree that injector info is key, I am still working on it but I am having trouble finding info on the offset voltage and on the short pulse adder that gives me enough to actually make changes I am comfortable with, therefore I have not changed anything.
The car is running but I always tune in Speed Density first, then move into CL with the MAF on. I need to get the Open Loop AFR Tables right, but first I need to get the VE tables dialed in. They needed a 38% decrease to get my fuel trims REMOTELY close at idle in SD mode...I am going to start driving her and see if I can get the other RPM's dialed in a little closer.
AIf anyone has any good information regarding Offset Voltage please let me know!
