Adjusting VE tables
Thread Starter
TECH Fanatic
Joined: Jun 2014
Posts: 1,533
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Ya I finally fig it out. The wideband was bad. It seemed like it was working, but would go lean @wot. Put a new sensor in and it's been fine. Now I just need to fig out where I need to be with the meth. Right now it's around 10.7@WOT w/ water/meth.
ok i guess thats not that bad. I'm no super boss tuner by any means. I'm just comparing and contrasting with other pump gas tunes....i mean if it's working and not breaking ****, it's working.
my two concerns would be
is that commanded timing really the actual timing?
verify at the balancer with a timing light.
if that is the real timing, how does the motor like it?
verify on the plugs it's not detonating and is burning well
my two concerns would be
is that commanded timing really the actual timing?
verify at the balancer with a timing light.
if that is the real timing, how does the motor like it?
verify on the plugs it's not detonating and is burning well
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18* is not high.
I'm running 17.5* (commanding 18*) at WOT on 93 pump gas. Running 10ish psi on a stock 5.3, ported stock heads and a custom 216/228 cam. This is with a W2A intercooler (80-100* IAT) and 750ml of 50/50 water/meth on a progressive controller. I'm in the 11.2-11.8:1 range with the meth spraying.
Really depends on the IAT temps. But water/meth can really control detonation depending on the setup and how much your spraying. I was running the same timing with the all stock motor too. havent had any issues with the setup now and Its only driven on the street in the warm months (right now) and I try to beat the **** out of it everytime I get it out lol.
I'm running 17.5* (commanding 18*) at WOT on 93 pump gas. Running 10ish psi on a stock 5.3, ported stock heads and a custom 216/228 cam. This is with a W2A intercooler (80-100* IAT) and 750ml of 50/50 water/meth on a progressive controller. I'm in the 11.2-11.8:1 range with the meth spraying.
Really depends on the IAT temps. But water/meth can really control detonation depending on the setup and how much your spraying. I was running the same timing with the all stock motor too. havent had any issues with the setup now and Its only driven on the street in the warm months (right now) and I try to beat the **** out of it everytime I get it out lol.
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Verdad Gallardo Way to rich. Lean it out to 11.5-11.8:1 and you'll pick up some power and not waste as much gas.
Ive seen a .3:1 ish richening when Meth Activates which is why I like to tune to 11.3-11.5:1 with the meth, in case the meth stops i'm still below 12:1 and won't blow it.
How much are you spraying? When are you spraying it and where? Engine compression? Any other form of inter-cooling?
Gah, tune the **** in Lambda. And set it at .78 lambda (1.28 EQ ratio). Reading for A/F is going to fry your motor. Meth is rich at 4:1 A/F... so unless you know how much you're spraying you can't really figure it. I put that in your other thread as an example.
But the VE table is based on RPM/MAP readings. So idle is say 45-50kPa at 800 rpm. Well that is not what it will read at WOT.
Also, if you have LTFT, disable them. Zero reason to run that. STFT is enough for CL operation if you've tuned your VE table. LTFT is designed for a PCM that gets sold all over the world in different elevations. So one tune can work everywhere as the PCM "learns" the environment. So unless you're going to run Pike's Peak this week and drag race in Miami the next, your tuned VE table with STFT will be within 5% accuracy in CL operation most of the year.
But the VE table is based on RPM/MAP readings. So idle is say 45-50kPa at 800 rpm. Well that is not what it will read at WOT.
Also, if you have LTFT, disable them. Zero reason to run that. STFT is enough for CL operation if you've tuned your VE table. LTFT is designed for a PCM that gets sold all over the world in different elevations. So one tune can work everywhere as the PCM "learns" the environment. So unless you're going to run Pike's Peak this week and drag race in Miami the next, your tuned VE table with STFT will be within 5% accuracy in CL operation most of the year.
I only tune in Open loop Speed density.I just recently engage the STFT. I tune the VE from datalogs and get them close to where I want them at idle/part throttle/and WOT but run it alittle richer to be safe. Then engage the STFT so it pulls fuel at all rpms so incase something happens and STFT dies the VE is good and slightly rich. STFT will lean out and get me my 14.7-15:1 for idle/part throttle/cruising. BUt I've noticed my STFT only adjusts in my logs to 100kpa and then stops so everything above 100kpa or "boost" is all depended on VE table anyways.
I personally dont trust the NB sensors, thats why I run a WB02. But cam overlap will affect WB02 readings etc so I guess its all guessing anyways lol.
I personally dont trust the NB sensors, thats why I run a WB02. But cam overlap will affect WB02 readings etc so I guess its all guessing anyways lol.
Thread Starter
TECH Fanatic
Joined: Jun 2014
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It's an ly6 /whipple 2.9 . I upgraded the heat exchanger to an Afco w/ fans. AIT are 25-30 over ambient Compression is 9.6to1 .mast m-90 ecm open loop speed density . Snow progressive meth kit . 625ml nozzle. 10-11 lbs boost