Bigger MAF
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Bigger MAF
Alright...a few of ya'll know the goodies I've got on my truck and she's runnin pretty quick now with about the same mileage as before....If ya don't know the goodies just look at my sig.....Anyways, I was thinking about a bigger MAF sensor to replace the stock one....I've got these goodies is it time to up the MAF a few MM's?I've read through articles on mags and everything else but can't get a baseline of goodies or power you'd need before you get a bigger MAF.....Any help is appreciated...thanks in advance....
JR
JR
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From: Ottawa, Ontario
You would need to get a lot more air through that motor before a bigger MAF meter would be needed.. better heads and WAY more cam.. well beyond what the stock injectors are capable of supporting.
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Originally Posted by flareside_thunder
......but what's the baseline power or goodies?
JR
JR
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would anyone with a desktop dyno like to plug my specs in?I'd really like a general area of what she's runnin anyways...the nearest dyno is...ugh a ways.Paul you're saying I need more cam and what not?I know the stock 19lbers can handle wwhat she's got now..........
JR
JR
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From: Ottawa, Ontario
The stock 70mm? MAF meter flows 550 CFM, that is enough to support about 350HP.. the ratio for calculation is approximately 1.5-1.6 CFM/HP. With the F4TE cam I doubt that motor makes more than 260HP give or take, which is a nice improvement over stock, but still way short of fully utilizing the flow potential of the stock meter.
P.S. I'll add that regardless how much air a meter can flow, it's output signal is always between 0 and 5v. An engine that has a meter sized appropriately for it's needs will use a greater portion of this 5v range, and that provides more air flow resolution to the computer, which results in better control over engine operation.
P.S. I'll add that regardless how much air a meter can flow, it's output signal is always between 0 and 5v. An engine that has a meter sized appropriately for it's needs will use a greater portion of this 5v range, and that provides more air flow resolution to the computer, which results in better control over engine operation.
Last edited by Conanski; Jan 3, 2008 at 09:43 AM.
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It is also possible to peg the meter at 5V if airflow is increased above what corresponds to that 5V signal. The OEM's will size it like you said, using as much of the 0-5V range as possible, the only problem is with big increases in power output, the airflow can exceed that signal range. If airflow is increased above the airflow value for that 5V signal, the computer does not sense the additional airflow above and beyond the 5V air flow value -- the MAF signal will remain at 5V no matter how much more air is flowing through it. That's when you need a different MAF calibration and computer tune.
Last edited by EPNCSU2006; Jan 3, 2008 at 10:58 AM.
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From: Florida
Thanks for the info Paul and Eric....gave me more than a little input for what I wanted to know and I appreciate it.....That'd be cool Chris I didn't know you had one.....once I get around to a real dyno I'm gonna slide her on but I'm itchin to get some figures...Thanks again guys........I was starting to feel like I was neglecting myself on the performance knowledge areas....so I had to ask...Thanks again fellas.Later On
JR
JR