AFR Table where to start?

Mad Professor · Post by **Mad Professor** » Tue Dec 20, 2005 12:58 pm

Hi All.

Can someone please help me out with making a new AFR Table.

Min MAP: 20 KPa
Max Map: 200 KPa.
Idle: 950Rpm
Rev Limit: 6000Rpm

What other data will I need to help me make a new AFR Table?

Thanks for your time.

Mad Professor · Post by **Mad Professor** » Wed Dec 21, 2005 8:21 am

Here is my AFR Table, Like I said I don't know how to set this one up.

dbubb · Post by **dbubb** » Wed Dec 21, 2005 9:15 am

Generally seems the right shape to me.
I'd try leaning out the cruise region i.e. ~50kpa to 16.
Then I richen the region from 100 kpa and up. try 13.5 at 100kpa and somwhat richer than you have in all regions above that.

Also, you'll probably need to richen the 800-1300 rpm and 20-100 kpa part of the map to around 14 so it'll idle decently.

JesseT · Post by **JesseT** » Thu Dec 22, 2005 1:03 am

Mine for reference:

How lean one can go depends really much of the engine design and that you have to experiment yourself. E.g. I can't go any leaner than 15.5 really as at 16.0 I get driveability issues. The idle AFR settings depend solely on the emission levels one is targetting. I run mine rich at ~14, because emissions are not an issue and it smooths the idle because of the largish injectors I'm running with MS-I.

captain16vgti · Post by **captain16vgti** » Thu Dec 22, 2005 2:17 am

Mad Professor wrote:Here is my AFR Table, Like I said I don't know how to set this one up.

How do you have yours setup to be in a 12x12 table ?

-Chris

JesseT · Post by **JesseT** » Thu Dec 22, 2005 12:13 pm

captain16vgti wrote: How do you have yours setup to be in a 12x12 table ?

It's the MS-II

ChaosAD · Post by **ChaosAD** » Thu Dec 22, 2005 10:54 pm

What is a safe table to start off with? and how do I turn on autotune?

How do you know what to set the tables at?

daxtojeiro · Post by **daxtojeiro** » Fri Dec 23, 2005 9:18 am

That table looks like a N/A table to me, with boosted values in it! I wouldnt run an engine above 100Kpa that lean, normally youll need 13.5-12.5AFR at WOT to get max power. And when in boost you generally need 11-12.5 depending on boost levels and engine design. So that table would be well out! Id change that to 13AFR at 100KPa and 11.5 at 200KPa for starters,
Phil

arny528 · Post by **arny528** » Sun Dec 25, 2005 3:11 pm

And I guess the engine wouldn't appreciate running so lean at high-RPM (low- and mid-kPa ) either...

Mad Professor · Post by **Mad Professor** » Mon Dec 26, 2005 2:34 am

This is what my AFR Table looks like atm.

From what you have said above it would look like I still would need to richen up 100kpa.