OLFA table vs. Custom OS A0008 table

[1bar]

My custom OS does not have OLFA, it has a A0008 file. The A0008 states its a multiplier. Is this truely a multiplier or is it a divider?

Thanks,
Glenn

[Tordne]

It is a multiplier. I'm going to assume that your display units are AFR or EQ Ratio , and that the commanded AFR is 14.63:1 (or EQ Ratio of 1.0) for the example.

- A multiplier of 1.00 the commanded AFR will be 14.63:1
- A multiplier of 1.20 the commanded AFR will be 12.19:1 (Richer)
- A multiplier of 0.80 the commanded AFR will be 18.29:1 (Leaner)

The multiplier is for enrichment (richening the mixture) and the lower the AFR numbers are richer the mixture.

Hope that makes sense.

[redhardsupra]

how is 0.80*14.629=18.29 a multiplication? :) i'd call it a division

[NewV]

how is 0.80*14.629=18.29 a multiplication? :) i'd call it a division

No wonder my AFRs are out of whack :beer:

[Tordne]

All I can say is 'whatever', a higher number is more fuel. Multipliers generally give 'more', which in this case is fuel.

Either way, that's how it works.

[Garry]

how is 0.80*14.629=18.29 a multiplication? :) i'd call it a division
If you look at it on EQ basis, it's a multiplier ;)

[TAQuickness]

Could have sworn Lamda was the multiplier and EQ was the divisor. :nixweiss:

[joecar]

If you look at it on EQ basis, it's a multiplier ;)This is the key.:cheers:

It multiplies the current EQ to get the target EQ; the current EQ equals 14.63 divided by current AFR.

AFR = 14.63 / EQ = 14.63 * Lambda

or

EQ = 14.63 / AFR = 1 / Lambda

EQ, Lambda, AFR are all units of how much air/fuel.

A008 is a multipler in the sense that it multiplies current EQ to give target EQ.

Like Tordne said, the higher numbers are richer.

Edit: the more I write here, the muddier it is becoming...:bash:

[1bar]

Okay, I am going to try what Tordne said and see what happens.

The whole multiplier/division thing confuses me; however, I understand what is being stated!

I will let you know how it goes.

Thanks for all of the help!

GLenn

[Whippled 496]

how is 0.80*14.629=18.29 a multiplication? :) i'd call it a division

Thats what i am trying to wrap my head around...lol. My commanded AFR is 14.70:1 and my multiplier (for a specific cell) is 1.0229. 14.70 x 1.0229 = 15.036 which equals a leaner AFR. So regardless of the table description of "multiplier", if i put a number larger than 1.00 in there, thats going to equal more fuel right?

[Tordne]

Thats what i am trying to wrap my head around...lol. My commanded AFR is 14.70:1 and my multiplier (for a specific cell) is 1.0229. 14.70 x 1.0229 = 15.036 which equals a leaner AFR. So regardless of the table description of "multiplier", if i put a number larger than 1.00 in there, thats going to equal more fuel right?

Correct.

[Whippled 496]

thank you sir.

[dc_justin]

thank you sir.

And with yours and my OS problems, you can put either bigger or smaller than 1.0 and it won't have any effect. :( Mine is back up to OLFA commanded in 25 seconds. :(

[Tordne]

I recall you mentioning that before - refresh my memory. Is your prob with the Truck or TransAm OS?

[dc_justin]

I recall you mentioning that before - refresh my memory. Is your prob with the Truck or TransAm OS?

It's on the truck OS. I've tried either 3 or 4 different COS versions across the 2003-2004 years with no luck.
Lately, I'm working on other methods of increasing cold start drivability that are paying off fairly well.

[DrX]

Would be nice to have this table functional.;) OS is in my sig. Cold starts have to be way lean in order to get decent warmed up AFRs at idle.

I see that the new OSs have puddling/evaporation tables that might be used to deal with this.