stupid maf question
#3
TECH Junkie
iTrader: (21)
That is an interesting question (and answer). I went looking around, and some places indicate that the same MAF fits both engines. Why then, do the aftermarket guys (i.e. Granatelli) offer different part numbers (and presumably different parts) for each engine? IDK, I would just like to find out the answer.
#4
TECH Senior Member
iTrader: (36)
That is an interesting question (and answer). I went looking around, and some places indicate that the same MAF fits both engines. Why then, do the aftermarket guys (i.e. Granatelli) offer different part numbers (and presumably different parts) for each engine? IDK, I would just like to find out the answer.
#5
TECH Veteran
That is an interesting question (and answer). I went looking around, and some places indicate that the same MAF fits both engines. Why then, do the aftermarket guys (i.e. Granatelli) offer different part numbers (and presumably different parts) for each engine? IDK, I would just like to find out the answer.
#6
TECH Junkie
iTrader: (21)
So, if the stock MAFs are the same from the LT1 to the LS1, I have a couple of questions.
First, why did they start out different, or did they? Did they just have different part numbers but behaved the very same? I think you answered part of that already, they may have dedided they were "close enough".
I am pretty sure the LT1 and LS1 MAFs function in the following way: air flowing through the cylinder causes the wires to vibrate which causes the chip to send out frequencies to the PCM. Different volumes, different frequencies. The PCM manipulates that info, along with other info, and makes decision on things like timing, fuel flow, etc. Keeping in mind that this is all strickly time based, with our PCM the keeper of the clock.
If this is the case, and an LT1 MAF can be interchanged with an LS1 MAF, this indicates that the frequency patterns are the same between the two types.
SD tuning is a whole nuther subject, a.k.a. shoot the MAF. I like it, I intend to use it (it is especially useful in 2 bar and 3 bar applications), and its discussion should be another thread, IMHO.
Last edited by koolaid_kid; 01-09-2009 at 11:51 PM.
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#8
TECH Junkie
iTrader: (21)
So I think we have enough affirmatives to take the next step, they can be interchanged, stock for stock.
For me, that opens up a much larger field of MAFs that I can pick up and make changes to, Not big on descreening due to the bugs out here in the country, but those blades down the center have always bugged me. Of course there are PCM tables that will have to be rewritten, but so what. And the 85mm ends from an LS1 maf should fit an LT1 as well...or perhaps practice with my dremel a bit...
For me, that opens up a much larger field of MAFs that I can pick up and make changes to, Not big on descreening due to the bugs out here in the country, but those blades down the center have always bugged me. Of course there are PCM tables that will have to be rewritten, but so what. And the 85mm ends from an LS1 maf should fit an LT1 as well...or perhaps practice with my dremel a bit...
#9
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My testing has shown that they are not exactly the same, but are within 5% or so. I was not aware of the merging of the part numbers. So your BLM's will adjust a little, but it should run fine.
I have both kinds kicking around here, so once the weather clears, I may swap them.
Bob
I have both kinds kicking around here, so once the weather clears, I may swap them.
Bob
#10
TECH Junkie
iTrader: (21)
My testing has shown that they are not exactly the same, but are within 5% or so. I was not aware of the merging of the part numbers. So your BLM's will adjust a little, but it should run fine.
I have both kinds kicking around here, so once the weather clears, I may swap them.
Bob
I have both kinds kicking around here, so once the weather clears, I may swap them.
Bob
IIRC, BLMs are analogous to fuel trims?