A year or two back a hot topic on these boards was some guys trying to hook up dual MAF's to increase the intake capacity...

The archives has plenty of "I think it SHOULD work", but no "I did that." Has anyone had the proper cash-in-pocket/alchohol-in-blood ratio to try messing with multiple MAF's?

Here's how i understand it... 2 MAF's added together should report proper voltage to an ECM, BUT, if 1 gets fried, rather than trip a code the ECM will read half voltage and lean the hell out of the car. If, though, you doubled the voltage from 1 MAF, and never bothered to hook up the other, (just put it in so each side of the air intake assembly is identical to the other) it should read correctly. This brings a few questions to mind though...

I'm probably horridly wrong here, but a 350 around 5k rpm stock will be looking for about 400cfms of air, (which is why TPI drops dead after around 4.5k), the MAF itself allows about 550 cfm, before that, stock heads top at about 375 cfm, making the heads the most restrictive point in the intake. Change the heads, and only then is the MAF a restriction (allowing a little less than the stock TB, which is around 650??) What about the runners and the plenum ect?

Now assume you ran 2 MAF's, (rather then try to screw with 1 and probably mess up your readings) about 1000 cfm, which would be plently for the engine above 4500 rpm, with good heads, manifold, larger throttle body, ect, perhaps you'd even be able to USE larger injectors....wouldnt this remove any upper-rpm limitations to TPI? At least up to around 1000cfm worth of air.....

But cfms aside, dual snorkel intakes (cold forced air induction or home made ram air) kick ***. They just look cool, so i still want 2 MAF's, even if its overkill on my engine at the moment...Has anyone done it yet?

 

Well, nice idea, but you can only hook up one MAF, so run a dual snorkel stuff, one tract would have a MAF sensor, the other tract would have a straight tube capable of flowing the same rate as the MAF. The MAF tables then need to be doubled, so you will hit the 256 magical value at a lower count value.

I have been thinking about our MAFs without screens, they are reported to be able to supply 719CFM, this should make over 400RWHP. The MAF is not the main restriction. I think its the long TPI runners and intake ports.

The Accel SuperRam can solve this restriction. It has much shorter runners and a big box of air.

 

Yes, almost everything i can think of in a TPI setup can be purchased aftermarket, for increased intake. The maf isnt even a factor until you've started to significantly beef up the engine, but, my thought was, the MAF seems like the only limit thats engraved in stone. The runners, manifold, ect, all can be worked around, but the MAF has a set limit. You cant just hack it apart and throw the guts in a bigger tube, wouldnt work right. I'm not so comfortable with gutting the screens and what not off...one of many discussions against it here...
https://www.thirdgen.org/oldarchives...ages/13303.htm

But, without gutting, 2 MAFs would run something like 1kcfm (higher then 720) and if you do believe in gutting them, something more like 1300-1400 CFM. MUCH more flow. After i started thinking about this, i started wondering, why it is that people at times will rag on TPI at higher RPM, or advocate a switch to speed density, it seems like if dual MAFs would work, theres NO reason to switch from TPI, other than maybe mod cost.

Im not sure on cfm on the runners or plenum ect. though, which is more limiting? By the way...the 2nd MAF sensor wouldnt get hooked up, just pull a broken one from a junk yard, and throw it in the line, just the restrict the air flow without a bias to one side, then you wouldnt have to worry about making sure the tubing allows no more CFM on the non-maf side then the maf does