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MAF mod interesting tidbit...(long!)


I thought everybody knew that the proper plug 'n play larger MAF's and the required chip programming to go with them are not available for the Ranger 3.0. Sometimes you just have to make do with what you've got (that's how hot rodding got it's start :icon_thumby:).
 
good point, however im still digging around to see if something else is compatible in the meantime. (this is how hotrodding evolves! lol)
 
I thought everybody knew that the proper plug 'n play larger MAF's and the required chip programming to go with them are not available for the Ranger 3.0. Sometimes you just have to make do with what you've got (that's how hot rodding got it's start :icon_thumby:).

What the hell? You can program a 91 Sentra to use a Cobra MAF for flock's sake, why wouldn't you be able to program a Ranger? Can't you at least change the entire engine management system and load custom programs?
 
good question, heres something interesting i stumbled upon as an update. on summit racing theres a jet maf for a 4.0 ranger/explorer that will fit the older obd1 system, maybe i can use it on my 3.3 turbo ill be building. one problem, the available sizes are 73 and 80mm, hows that for flow? considering its only 120 bux it may be worth a shot. if only the intake would take a throttlebody that size...
 
i think the stock ranger 3.0 tbs are only 50 mm so 73 or 80 would deff be a stretch.....
 
they are 50mm on the 3.0 im not sure on the 4.0, if i can get/find one smaller ill let everybody know.
 
Absolutely WRONG! It's the engine displacement that determines the size of the injectors! Changing to a larger MAF DOES NOT increase the amount of
air the engine is pulling!!!
Then the 4.6 stock 2 valve, 2 cam automobile engine will have the same injectors as the dual cam, 4 valve per cylinder cobra engine? They are both 4.6 liters. Correct?:)shady
 
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Then the 4.6 stock 2 valve, 2 cam automobile engine will have the same injectors as the dual cam, 4 valve per cylinder cobra engine? They are both 4.6 liters. Correct?:)shady


No Shady, anybody with any technical knowledge at all would realize that more air will flow with the Cobra due to the cam parameters, and larger effective valve openings, so the injectors will have a higher capacity!
 
No Shady, anybody with any technical knowledge at all would realize that more air will flow with the Cobra due to the cam parameters, and larger effective valve openings, so the injectors will have a higher capacity!
Thats not what you said. You said this:
Absolutely WRONG! It's the engine displacement that determines the size of the injectors!
Just want to clarify for those who may be interested.:)shady
 
Thats not what you said. You said this:

Just want to clarify for those who may be interested.:)shady



Again, poor reading comprehension Shady, the subject being discussed was
MAF sensors, NOT the differences in 4.6L engines...........Engine displacement WILL HAVE THE LARGEST effect on the amount of air being injested into the engine!!

....now go change the oil in a waiting customer's car................

And, to repeat what another TRS member said to you in another thread:


Shady, stop being dense.
 
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Again, poor reading comprehension Shady, the subject being discussed was
MAF sensors, NOT the differences in 4.6L engines...........Engine displacement WILL HAVE THE LARGEST effect on the amount of air being injested into the engine!!
Not covering your tracks very well Ayers. You said what you said. It's there for everyone to see. I gave the 4.6 as an example. Making hateful remarks towards me does not change any of that.:)shady
 
Absolutely WRONG! It's the engine displacement that determines the size of the injectors! Changing to a larger MAF DOES NOT increase the amount of
air the engine is pulling!!! Increasing engine displacement will increase air
volume, and going to forced induction.




thats some serious misinformation there..:icon_surprised:



hp is injector size....if the maf is the choke point in flow capacity a bigger maf will allow more air and power potential when matched to fuel delivery:dunno:


at least thats the way it works on this planet.
 
lambda is defined as 14.7:1 best complete burn, no side emissions correct. however, lean is mean as 15.5:1 at wot creates a hair more power on the dyno but creates less torque and extra heat. in a lot of cars it was also found that 12:1 mixes actually increased horsepower at wot by increasing the fuel to cool the engine components down. that is why in open loop systems the maf measures air and actually increases the fuel slightly as the air velocity steepens, if the velocity at the sensor is shown less than actual, the richening effect lessens, creating a leaner mix at wot throttle and open loop times, including hard acceleration and towing. the closed loop is only used at cruising and idle. the closed loop at cruisiing can be modified to 15.5:1 to lean the mixture and save fuel as you are running constant rpm and you are already overcoming the rest of the restraints on the engine (a/c water pump power steering etc.) the tuner themself has to decide what the vehicle is used for and if the modification is necessary, the performance ppl (me!) want their units closer to the 12:1 range to protect the engine during revs and hard acceleration between 70% and 100% throttle, therefore a proper maf signal is required to maintain this ratio properly.



thats about as good an explanation as this subject should need...:icon_thumby:
 
if the maf is the choke point in flow capacity a bigger maf will allow more air and power potential when matched to fuel delivery:dunno:


at least thats the way it works on this planet.


Hey Einstein, explain how a larger MAF will allow more air into the engine!
All the MAF does is sample the amount of air flowing through the intake tube!
Making it larger WILL NOT increase the amount of airflow into the engine!!
 
bob, try this:

put a drinking straw into your both and try to breath through it. now, remove the straw and breath through your open mouth. the larger "intake" of your mouth allows you to ingest more air faster.

IF the MAF was the choke point of the engine, enlarging it would increase VE.
 

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