Yet another MAF question
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Joined: Jul 2002
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From: Abilene TX
Yet another MAF question
I found a MAF sensor assembly on ebay out of a Lightning pickup and was wondering if there was a big difference between the Lightning MAF and one out of a stock 5.4. Would there be any noticeable (or worthwhile) gains from replacing mine with a Lightning MAF or just a waste of time and money?
Thanks for any help....
Thanks for any help....
Technical Article Contributor
Joined: Jun 2002
Posts: 10,511
Likes: 10
From: Under the flightpath of old ORD 22R
The Stock 5.4 L MAFS is 80 mm, the stock L ( depending on the year ) is a 90 mm MAFS. I forget the year between SD and MAFS when the L MAFS was still a 80mm.
Without having the more pedestrian mods done, it is not worth it.
The summary of upgrading the MAFS :
To install a 90 mm MAFS, you need to have a chip burned for it.
Also the better part of getting more air flow into the T/B is you would need to port and polish the T/B and T/B elbow. to take into account getting the air into the engine.
Next is you have more air going into the engine, and need to be able to get more fuel to the air for correct mixture. This means a few additional items might be needed.
Maybe a fuel rail upgrade, maybe a fuel pump upgrade, and maybe larger injectors ( so the pulse width is not trying to run at 100% at say a TPS of 70% ).
These are all dependant on what the A/F is from a Dyno pull with the 90 mm MAFS installed. Neal last posting was still trying to get the tune setup on his 90 mm MAFS that he has ported to 104mm.
He already swapped the fuel rail and the pump. Injecto upgrades, I am unsure of right now, don't recall if he posted changing injector sizes or not ( from the stock ones, I think 19#.
All in all, focus on Electric Fans, long tube headers, high flow cats, true dual exst, and a pulley upgade first. Then you can take into account trying to increase the amount of air / fuel mixture into the engine. That is like the previous step before a S/C install I would say.
Without having the more pedestrian mods done, it is not worth it.
The summary of upgrading the MAFS :
To install a 90 mm MAFS, you need to have a chip burned for it.
Also the better part of getting more air flow into the T/B is you would need to port and polish the T/B and T/B elbow. to take into account getting the air into the engine.
Next is you have more air going into the engine, and need to be able to get more fuel to the air for correct mixture. This means a few additional items might be needed.
Maybe a fuel rail upgrade, maybe a fuel pump upgrade, and maybe larger injectors ( so the pulse width is not trying to run at 100% at say a TPS of 70% ).
These are all dependant on what the A/F is from a Dyno pull with the 90 mm MAFS installed. Neal last posting was still trying to get the tune setup on his 90 mm MAFS that he has ported to 104mm.
He already swapped the fuel rail and the pump. Injecto upgrades, I am unsure of right now, don't recall if he posted changing injector sizes or not ( from the stock ones, I think 19#.
All in all, focus on Electric Fans, long tube headers, high flow cats, true dual exst, and a pulley upgade first. Then you can take into account trying to increase the amount of air / fuel mixture into the engine. That is like the previous step before a S/C install I would say.