Any MAFT Experts Out There???
Thread Starter
Teching In
Joined: Mar 2002
Posts: 22
Likes: 0
From: the LEFT lane
Any MAFT Experts Out There??? I recently got one; version 4.2.
I need some guidance about how to set it up. My inclination is to set it a little lean at idle and a lot more lean at WOT because a leaner mixture makes more horsepower. My engine is stock, but that's about all that is on the car (see sig). Can someone give me some guidance about baseline settings, what adjustments I should make for temperature and humudity variations, and whether this thing will work better, worse, or not at all in conjunction with Hypertech tuning. By the way, I normally run 35-40% 100 octane and 60-65% 93 octane in my tank. My rev limiter is set at 6400. The last time I dynoed it I got what appeared to be false KR above 5200 rpm's with the Hypertech tuning (non-rfg) installed. This went away when the tuning was taken out. I have not autotapped the car. Plugs are fresh as are the O2 sensors.
Thanks in advance for any help anyone can give me.
I need some guidance about how to set it up. My inclination is to set it a little lean at idle and a lot more lean at WOT because a leaner mixture makes more horsepower. My engine is stock, but that's about all that is on the car (see sig). Can someone give me some guidance about baseline settings, what adjustments I should make for temperature and humudity variations, and whether this thing will work better, worse, or not at all in conjunction with Hypertech tuning. By the way, I normally run 35-40% 100 octane and 60-65% 93 octane in my tank. My rev limiter is set at 6400. The last time I dynoed it I got what appeared to be false KR above 5200 rpm's with the Hypertech tuning (non-rfg) installed. This went away when the tuning was taken out. I have not autotapped the car. Plugs are fresh as are the O2 sensors.
Thanks in advance for any help anyone can give me.
On The Tree
Joined: May 2002
Posts: 108
Likes: 0
From: Richmond, Virginia
Re: Any MAFT Experts Out There??? 98BlackSS is correct, you need a scanner like Autotap to tune the MAFT in correctly, unless you go to a dyno tuner and he does it for you. Remember to work with the Ltrims on B1/B2 first to get them as close to zero as possible while the WOT setting is at zero on the MAFT. You then go to the WOT setting after the Ltrims are tuned in. The WOT will be somerwhere between .887 and .893, but to tune it correctly you need a wide range ox sensor..... Hope this helps...
Generally I have seen +10% to +15% on the low setting with a -5% on the WOT.... but each car is different due to different mods.
Generally I have seen +10% to +15% on the low setting with a -5% on the WOT.... but each car is different due to different mods.
