OLSD feels awesome.. issue down low.

[mr.prick]

B3632 won't help cold start with OLSD.
Lower B3605 to richen up at cold start.
The problem with tuning in OLSD is that VE will be lower than it would in CL,
that is why LTFTs will be positive once they're re-enabled.

Don't bother adjusting B4307 when AFR is overly lean or rich.

[drdarthinvader]

interpolate your ve while cranking (b0102) which is a good tool.

[LS1_Dragster]

B3632 won't help cold start with OLSD.
Lower B3605 to richen up at cold start.
The problem with tuning in OLSD is that VE will be lower than it would in CL,
that is why LTFTs will be positive once they're re-enabled.

Don't bother adjusting B4307 when AFR is overly lean or rich.

What?? Why does it work for my 3 cars???

[mr.prick]

I guess I'm special or unfortunate because it never did anything but lower the commanded AFR
and not actual AFR for me, only lowering B3605 dropped AFR at cold start in OLSD.
It might have to do with the OS, but for me B3632 did nothing even with RTACS.

[LS1_Dragster]

It's most likely because there are so many OS versions and just because I'm starting to understand mine doesn't mean I can help with the other ones! I have to keep remembering they all behave differently.

[waterbug1999]

No, dont worry about the air yet, lets get you more fuel.

What is your A0008

And B3632

Post your tune!

Here is the current tune. Im getting ready to go start it up, ill log it.

[waterbug1999]

forgot to paste tune.

[waterbug1999]

B3632 won't help cold start with OLSD.
Lower B3605 to richen up at cold start.
The problem with tuning in OLSD is that VE will be lower than it would in CL,
that is why LTFTs will be positive once they're re-enabled.

Don't bother adjusting B4307 when AFR is overly lean or rich.

You can see where it would be at during a cold start... But, its off by ~5 or 6 points (commanded is 13/14 and actual is 18/19 on the AF gauge). So, if it works in linear, I would have to bump it down to be commanded around 8 or 9.

I followed the tutorial, im thinking that it says to add 15% in B0101, maybe I can change that to -10% down low to richen it up??? Does it use that table during start?

[waterbug1999]

well, here is the cold start.. it caught and stayed running but still bobbled at the begining.

[mr.prick]

You can see where it would be at during a cold start... But, its off by ~5 or 6 points (commanded is 13/14 and actual is 18/19 on the AF gauge). So, if it works in linear, I would have to bump it down to be commanded around 8 or 9.

If you do change B3605, don't use straight BEN factor.
Subtract 1.00 until it richens up, you don't need to go too rich for cold start.

I followed the tutorial, im thinking that it says to add 15% in B0101, maybe I can change that to -10% down low to richen it up??? Does it use that table during start?

This will lean you out.
In OLSD you will need more in the VE table for colder ECT and
as the engine warms up you will need less.

This is why I use LTFTs.
When LTFTs are 0% to -5% the VE table will have higher values so
when in OL AFR will be richer, no lean cold starts.

Example:
OLSD @ 200°F ECT & IAT 90°F will need x.xx in VE but
100°F ECT & 60°F IAT will need more and will progressively need less as
ECT & IAT get higher.
Even with ECT at normal/steady operating range,
IAT will have an impact on fueling.
High IAT = higher AFR.
For me over 96°F AFR will start to lean out in OL.
There are IAT & ECT blending tables but they are scaled by the MAF.