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Maybe this is common knowledge around here, but I couldn't find anything about it when I was searching. My Corvette runs the Normal shift schedule in Drive and Pattern-B in Sport. But the 4-5 and...

Short shifting first gear might be the easiest way around this problem. I'll have to see if I can dial it in a bit better next time I'm at the track.




Robert,

I think I see what you are...

Yeah, that's not going to happen. Its a street car and I run street tires. I don't go to the track on a regular enough basis to make it worth while. It would just be nice to keep the car straight...

I was in TUTD. This was at the drag strip running Michelin Pilot Sport 4s. Launch does ok, 1.9 60'' with no spinning after a good burn out.

What would be the "proper" way to reduce the shift impact on my 1-2 shift on my 6L80? I'm running an LS3 corvette with a centrifugal supercharger, no other engine or exhaust mods. I'm still running...

Are you talking about the O2 learning? That should be under the engine tab, then another sub-tab, but I don't recall off the top of my head. There is also the option of putting the car in open loop...

The car seems to drive fine. I don't notice anything out of the ordinary. But I'm trying to go through and tidy up some of the thing like the lean tip in.

I did find the PVC hose had come off...

I am running SD only. MAF is disabled. The air is to turbulent to get a good MAF reading with the supercharger and MAF placement. But that did give me a good idea, I decided to plot the MAF just...

I was able to do more testing with more updated VE table and injector timing. I'm getting the same thing.

From your list, adjusting the "Pump shot" sounds like something promising. But I can't...

My injectors are now 60#/hr. I'm not sure what the stock ones are for an LS3.


I added the injector data on my last log file and here is what it is. I scaled the MAP(orange) and Injector...

I'm running the stock cam with bigger injectors. I didn't think I wanted to move the injector timing with the stock cam, but maybe I need to do a bit more research into that.

I found an...

I took your advice, put the transient fueling back, increased the PE ramp rate to 1.9, and added a bunch more fuel in the 100kpa area. I went through and smoothed a lot of things out. I took more...

I'm attempting to do some transient fueling tuning on my car. This is an LS3 Corvette with an ECS supercharger on it, no other mods. This is a MAP only tune. In an attempt to get rid of a lean...

Is this the spike you are referring to for your question? The throttle open blip?
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One thing I would mention quickly looking at this file is that in a spot that looks like you are just...

I've been searching and looking for answers but can't seem to find a good explanation. I've got a weird situation where if I'm in stop and go traffic and I keep the tranny locked in 1st or 2nd, the...

Realizm, thanks for the feedback. I have a file all modded up to reduce the knock retard and de-sensitize the knock sensors. I haven't had a chance to go run it though. With the way work has been...

I managed to do a bit more testing. Even taking another 6 degrees out of the timing table above 1g. This didn't do anything to dispel the knock being seen.
Next I tried to increase the timing in...

I took some data with the octane booster. first file is with about 1/8 of a tank, the second file is with a thing of octane booster and and extra 3 gallons of gas to mix it up a bit. It did not...

I'm trying to get my timing figured out for my car and the knock retard that I'm seeing seems very inconsistent. One run it seems fine, another I get 10 degrees. I thought I was some pretty low...

Ok, that makes sense. It is good to know that this is a normal thing and not my car flipping out. When you say the downstream O2s are turned off are you referring to the DTC's or something else?

Here's the tune file.

I turned on my closed loop O2 feedback for the first time in a long time. As I stopped in the garage I glanced at the wideband gauge and I noticed it get really rich, then a bit lean, then back to...

I managed to find this with a quick search. It looks like pin 63 is the control line for the A/C compressor clutch. If the ECM is trying to control the clutch things might be a bit more complicated...

I came across this on one of the other forums. I thought other people might enjoy it.
...

Try logging barometric pressure and see what it does before and after a WOT tune. Then take a look at your cruising AFR before and after the WOT. If you aren't seeing much of a difference it may...