MAFT settings questions

**mko** · 07-30-2009, 01:49 AM

Ok, So Im about to put Evo3 510cc injectors on my 4g64 motor 240cc stock injectors which has OBD1 ECU/1g/, but I get all kinds of information about what settings I should dial for BASE and AUX. Its 1st gen MAFT ver. 1.6. I researched it and got lots of info on it and from what I found out I need to compensate 53% with the MAFT.

Formula: (1 - stock size inj. / new size inj)*100 = (1-240/510)*100 = 53%

Here's the confusion:

http://www.club3g.com/forum/rs-gs/10...m-maf-faq.html

If you follow the link^ and cross match 53% youll see settings BASE = A; AUX = F

Another one:

http://www.fullthrottletech.com/showthread.php?t=105

If you follow the link above theres a tuning table for MAFT ver 1.37 and above, and youll see the settings BASE = 8; AUX = 0

One more:

http://www.fullthrottletech.com/showthread.php?t=642

If you follow the link youll see instructions for ver 1.3 which puts the BASE setting between A and B for 53% lean out.

So, if someone is using MAFT, please help. I need to know what settings are correct. Just keep in mind that OBD1 fuel trims are leveled at 100%,and they are not like OBD2 trims leveled at 0%

**DOHCstunr** · 07-30-2009, 10:26 AM

with a maft, you will NEVER get it perfect.
ever.
with that said. you aren't going to hurt anything if you get it wrong.
so just slap it on, and try a setting, watch your wideband, make adjustments.
done.

**mko** · 07-30-2009, 11:43 AM

I wished we could log the fuel trims, but damn that OBD1.5

**GOOSEY2099** · 07-30-2009, 12:29 PM

Great tool non the less.. I'm running it in my 8g with no problems, but i'm also simply retranslating mas signal so i can do blowthrough

**crzejkr** · 09-23-2009, 08:02 PM

stocks are 275cc.

**hk20000** · 09-25-2009, 09:06 PM

the manual that comes with the MAF-T should have a look-up table for whatever injectors you are running, I would start there and trim the rest with something more versatile like S-AFC2

Worked miracles for me.

However my engine is a 6A12 which the manual does not cover, I simply based the tuning on the fact that the Galant VR4 MAF is the identical part to a 2G Eclipse and turned the settings to match. If I change my injectors I will have trouble getting it right again.

**Galanttuner10** · 10-24-2009, 10:26 PM

how did you end up setting this up just curious.. with the new MAFT Pro i can set my desired a/f ratios and be done with it

**mko** · 10-24-2009, 11:13 PM

IDLE 14.7
IDLE to 3000/Cruise at 65mph/ - 14.7-15.5

youre gonna have that 14b spooled by 2500

3000 and up, youre gonna have to set it for your car, but try to richen it down gradually to 11/WOT/

I know my 3/4WOT pulls are around 12 and it goes down more. If I do WOT with AFRs in the 13s I get knock

**Galanttuner10** · 10-24-2009, 11:26 PM

ok thats good to get some numbers to go off off.. i have a b16g as well that im going to rebuild maybe as a 20 or as a b16g again.. i know it will spool quick. when i get it all in im gonna hopefully use the shops dyno for some tuning and adjust the cruise off of street runs and get some numbers as well

i really dont want to lean out thats my only real fear

**RedLine DOHC** · 10-24-2009, 11:42 PM

so at wot w/turbo you want leaner top end?

**mko** · 10-24-2009, 11:43 PM

11s = rich
20s=lean

**RedLine DOHC** · 10-24-2009, 11:47 PM

that makes sense then tought it was the other way around

**Galanttuner10** · 10-25-2009, 12:04 AM

these cars have a tendency of running really rich up top.. i was helping a buddy tune a 1G a while back and the ratio went to 11s no matter how much fuel we tried to pull and you could just feel it bog out

i really dont want to lean out and i feel with the maft pro ill be able to stay away from that situation

**mko** · 10-25-2009, 12:15 AM

If you running rich and cant tune it out then you have after maf leak. Dont ask me how I know

**Galanttuner10** · 10-25-2009, 12:28 AM

this was on a 1g with a 2g maf..

i dont believe im going to have any leaks.. everything is new including the maf

mko are you going to upgrade to gen 2 or pro so you can get rid of the safc or what are your thoughts on your current setup

**RedLine DOHC** · 10-25-2009, 12:35 AM

let me know that you think of the pro, I looked at one and just wondered if its really all that much better

**Galanttuner10** · 10-25-2009, 12:40 AM

its a boost controller has many tuning capabilites and can use it in 3 different modes.. my choice is between pro and gen 2 currently

**mko** · 10-25-2009, 01:51 AM

Yeah, Ill get gen2 eventually, but I needz a job first. I like the MAFT+ SAFC, but i need some more stealthy and of course the ability to track wideband makes the gen2 much better than SAFC.