maf porting good or bad
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From: mechanicsville,va
maf porting good or bad Took my car to get a street tune and tuner bout flipped his lid because the maf had been ported and how hard it is to tune like this he went ahead and tuned it to the maf but said it was running super lean because of the ported maf, now that being said is this something I should worry about since he tuned it to the maf or should I get some diff ends to put on my maf so its not ported if so will it need to be re- tuned if ends are changed?
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From: mechanicsville,va
I did he said it would be fine with the adjustments he made but he said with the fluctuations in the flow it wouldn't be perfect but he made it work well to me making it work isnt isnt optimal and I don't know about tuning that's why I'm here to get an un biased opinion should I be concerned and fix the maf to make it more stable, what if anything am i losing by leaving it like this or leave it.
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From: SV, AZ
I did he said it would be fine with the adjustments he made but he said with the fluctuations in the flow it wouldn't be perfect but he made it work well to me making it work isnt isnt optimal and I don't know about tuning that's why I'm here to get an un biased opinion should I be concerned and fix the maf to make it more stable, what if anything am i losing by leaving it like this or leave it.
The "fluctuations in the flow" are caused by the "porting" and by the removal of your screen. This screen in a laminar flow screen, its like a comb for the air. Without it the air tumbles and swirls around in the tube. With it it flows smooth and regular. This allows the sensor to get accurate, reliable readings and give the PCM the correct values. Your MAF bounces around, up and down which makes it difficult for the PCM to use its predictive programming.
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From: mechanicsville,va
Ya I already realize its a bad idea what I'm saying is should I leave it like it is with the tune he made it work or fix the maf and if I do fix it will I need another tune.
There's nothing about a "ported MAF" that should make the car run super lean as he said:
Any change to the engine setup can be accounted for in the tune so that in the end it ends up running correctly at the proper fueling. Him blaming a ported MAF for it running lean is laughable, as 1) that can be easily fixed in the tune and 2) a ported MAF is not nearly enough of a change that the o2 sensors cannot account for and bring back the fueling to the right spot. So there's absolutely no reason that your car should be running super lean.
So please take your car to someone else who can properly tune it, and if you want to do it right just put back a normal MAF in your car.
tuned it to the maf but said it was running super lean because of the ported maf
So please take your car to someone else who can properly tune it, and if you want to do it right just put back a normal MAF in your car.
You should be making changes to the MAF table regardless when tuning a car and having ported ends on a MAF just means you need to make more of a change in most cases. If a tuner freaks out because of this I would run away.
