B3601

[curtbriggs]

Refer to the Dec.29,2005 2-3 bar tutorial by Ross Myers.

I just installed this Custom Operating System using 2 bar. It's recommended that I start with a AFR of 11.2 at WOT with 6 lbs of boost.
Should I change B3601 to a lower AFR then 14.63 such as 11.2
I set the EQ ratios at 1.0 increasing to 1.06 column 95 and 1.13 to 1.17 under column 100.
Local fuel is 10% Ethanol. MAF disconnected.

Thanks, Curt

[mr.prick]

{B3601} is the AFR value for EQ/Lambda 1.00 and changing it will have a dramatic effect of fueling.

That's too low of a value for 10% Ethanol, 14.2 would be more appropriate.

[joecar]

I agree on 14.2.

I haven't done this, but there's a kit that determines the alcohol content of your fuel, it then has a chart showing stoich AFR.

[curtbriggs]

{B3601} is the AFR value for EQ/Lambda 1.00 and changing it will have a dramatic effect of fueling.

That's too low of a value for 10% Ethanol, 14.2 would be more appropriate.

Joe and mr, thank you for the reply.

Using the B3647 table as set on page 10 and applying The EQ ratios of 1.06 at 95 kPa (what ever boost that would be in inches of manifold pressure) would translate to an AFR of 13.4 and the EQ of 1.17 at 1600 rpm and 100kPa would give an AFR of 12.14.
Close but not what I want to run the engine under boost the first time without damage with my 11.3 to 1 compression ratio.
Looks like I should change the B3647 table to start higher EQ ratios and earlier.
I find it hard to think in metric values but I've read that it's better to learn to do so.
14.2 would be fine until until the boost comes in. Did I understand your answer correctly???

Thanks, Curt

[mr.prick]

You want higher EQ/lower Lambda values under load (especially w/FI).
Set {B3601} to whatever you're using and use the PE and/or commanded fuel tables for enrichment.

Don't shortcut with {B3601} to avoid changing the other tables. ;)

[curtbriggs]

You want higher EQ/lower Lambda values under load (especially w/FI).
Set {B3601} to whatever you're using and use the PE and/or commanded fuel tables for enrichment.

Don't shortcut with {B3601} to avoid changing the other tables. ;)

I'll change the B3601 to 14.2. I've modified the A0009 Boost VE table as per Ross's tutorial, page 7. Here, the B0101 Normal VE table 105 column is copied to the A0009 Boost VE table and from the 105 column to the 285 kPa column is increased 300%.

If you were in my position, would you use this 2-3 bar tutorial or would you go a different route. PM would be appreciated.

Thanks again for your help. I can't believe how much I've forgotten in 5 years but it's starting to come back.

Curt

[mr.prick]

COS is your best bet.
You can change the view of these tables to AFR if that's what you are comfortable with.

[curtbriggs]

COS is your best bet.
You can change the view of these tables to AFR if that's what you are comfortable with.

Right, I'm using the EFILive COS #02040003.

Cheers, Curt