Tuning with MAFT, need help!
Thread Starter
Launching!
Joined: Oct 2002
Posts: 217
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From: Neshanic Station, NJ
Tuning with MAFT, need help! I got FLP headers (with cats) installed yesterday. We did two wideband dyno runs on the car with a 13.0 : 1 A/F ratio. My MAFT is set to 0 on both WOT and base.
However, I after the dyno runs on the way home, I autotapped the car (through 3rd gear). I noticed at WOT (and normal cruise) my LTrims were really high. At WOT, I'm reading 11 on Bank 1 and 14 on bank 2. I am getting 0 knock retard and my usual full 26.5 timing.
I know I want LTrims as close to 0 as possible. I'm pretty sure high positive LTrims mean that I'm running lean. However, isn't 13.0 a good A/F ratio NA?
Should I adjust the MAFT base or WOT a little to bring the LTrims down, or am I good right now? I know before the headers and MAF ends, the car was reading like 2 on the LTrims.
Any help is greatly appreciated!
Chris
However, I after the dyno runs on the way home, I autotapped the car (through 3rd gear). I noticed at WOT (and normal cruise) my LTrims were really high. At WOT, I'm reading 11 on Bank 1 and 14 on bank 2. I am getting 0 knock retard and my usual full 26.5 timing.
I know I want LTrims as close to 0 as possible. I'm pretty sure high positive LTrims mean that I'm running lean. However, isn't 13.0 a good A/F ratio NA?
Should I adjust the MAFT base or WOT a little to bring the LTrims down, or am I good right now? I know before the headers and MAF ends, the car was reading like 2 on the LTrims.
Any help is greatly appreciated!
Chris
Thread Starter
Launching!
Joined: Oct 2002
Posts: 217
Likes: 0
From: Neshanic Station, NJ
Re: Tuning with MAFT, need help! OK, taking some advice I was given, I tuned the car (base) for 6% rich. It brought the Ltrims in the negative at idle, 2.x and 0 (banks 1 and 2) at WOT and still positive around 5. I ran the car today and it just didn't run all that great. The track was kinda slippery and stuff, but the car just didn't pull as strong (I was barely squeeking off 12.9's with skinnies and full interior). I'm thinking I may need to tune it more. Any help is appreciated!
Chris
Chris
Launching!
Joined: Sep 2002
Posts: 238
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From: Warren, mi
Re: Tuning with MAFT, need help! Changing the Ltrims did what for you? besides get them closer to 0 correction?
changing the base effects the wot too.. so your air fuel is no longer the great 13.0 - 1 it was...
If its not broke, dont fix it
changing the base effects the wot too.. so your air fuel is no longer the great 13.0 - 1 it was...
If its not broke, dont fix it
Thread Starter
Launching!
Joined: Oct 2002
Posts: 217
Likes: 0
From: Neshanic Station, NJ
Re: Tuning with MAFT, need help! Yup, it got them closer to 0.
I thought that was what's important <img border="0" title="" alt="[Confused]" src="images/icons/confused.gif" /> .
I am confused to all heck. Is it really bad at all to have higher LTrims, or should I set it back to how it was?
Chris
I thought that was what's important <img border="0" title="" alt="[Confused]" src="images/icons/confused.gif" /> .
I am confused to all heck. Is it really bad at all to have higher LTrims, or should I set it back to how it was?
Chris
