MAF Questions????? - Ford Mustang Forums : Corral.net Mustang Forum
 
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post #1 of 12 Old 04-22-2003, 12:34 PM Thread Starter
 
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Question MAF Questions?????

In regards to turboed applications:
1) Why is the location of the MAF important?

2) What is the differance between normal MAFs and blow-through?

3) Why can't you put a normal MAF after a turbo, while you can with a blow-through?

4) Are there any good web resources dealing with this topic?

THANKS!

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post #2 of 12 Old 04-24-2003, 04:22 AM
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A friend of mine has his C&L as a blow-through. I guess you would call that a ''normal'' maf right? He just has the sample tube for his 42lb injectors and its almost in the stock location.


Chris
99 Procharged Cobra sold
95 Cobra single turbo. [email protected] stock block.


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post #3 of 12 Old 04-24-2003, 04:51 PM
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Re: MAF Questions?????

Quote:
Originally posted by bleucamaro
In regards to turboed applications:
1) Why is the location of the MAF important?

2) What is the differance between normal MAFs and blow-through?

3) Why can't you put a normal MAF after a turbo, while you can with a blow-through?

4) Are there any good web resources dealing with this topic?

THANKS!
1. Don't think it's really that important... You could put it before the turbo (draw-thru) or after (blow thru). Most people place the MAF after the turbo for simplicity in plumbing (especially in a twin setup).

2. The only things different about a "blow-thru" are the meter body and calibration. The body will have a raised ring around each end to help seal the rubber connectors clamped on. The blow-thru will be pressurized, where as the draw-thru is not. The calibration is generally set to be richer than a standard draw-thru.

3. You can, but might want to have it recalibrated. Also might be hard to keep sealed.

4. Don't know.
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post #4 of 12 Old 04-27-2003, 12:05 PM
 
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Use a blow through. If you put the MAF before the turbo(s), you will have to use a physically larger MAF because you will only be able to generate about a 15 lb in (sq) pressure drop with one end open to atmospheric pressure. Placed after the turbo, you can generate a larger pressure diff and you will flow compressed (forced) air through the MAF. Forcing air through the MAF allows you to use one that is physically smaller.

Blow through MAFs are calibrated differently and are machined (in some caese) so it won't disrupt laminar flow.

Mitch

Last edited by MitchB; 04-27-2003 at 03:11 PM.
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post #5 of 12 Old 04-27-2003, 02:40 PM
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one other reason is alot of people are running twin turbos which means you would need 2 mafs and some special elcectronics to make them work properly. With a blow thorugh, just one MAF before your throttle body. People try to put the MAF in a straight section so there is less turbulance. That's my take on the whole thing.
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post #6 of 12 Old 04-27-2003, 07:52 PM
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I have a cartech single with 2.5" intercooler piping. Pro-M custom sizes the universal meters. Would it be ok to use a 2.5" universal meter for blow through? Seems wierd, I've never seen it before. Also would it be ok to put the meter anywhere after the turbo(besides BOV issues)? I can't put it up by the throttle body, it won't fit.

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post #7 of 12 Old 04-29-2003, 01:03 PM
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No to jump in on your thread here, but i have a question regarding maf's. Eventually i plan to get a cartech system and i've been looking at maf's for my car as it is now that will also work with the single turbo system, would a pro-m 80 work for both or should i just get the 75 bullet? thanks
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post #8 of 12 Old 04-29-2003, 03:07 PM
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IMO the 75mm bullets a piece of crap. id recommend the 80mm, or the universal.

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post #9 of 12 Old 05-04-2003, 12:23 AM
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Will the 80mm fit the piping on the cartech single turbo system without any trouble?
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post #10 of 12 Old 05-08-2003, 01:59 AM
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SO if i'm getting this straight a blow-thru would be between the turbo and the intake and it would be a better choice than and drawn-thru...

And if anyone know if the above question will work?
"Will the pro-m 80mm fit the piping on the cartech single turbo system without any trouble?"

I'm just trying to aviod buying 2 maf's cause the first one i get won't work.
Thanks

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post #11 of 12 Old 05-08-2003, 11:33 AM
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Quote:
Originally posted by vegastang
IMO the 75mm bullets a piece of crap. id recommend the 80mm, or the universal.
I run a 75mm blow-thru bullet with no problems at all.

Rob
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post #12 of 12 Old 05-09-2003, 05:25 PM
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i'm talking about draw through. try sticking it down behind the foglight on a turbo setup with turbulent air and see how you fair. just saying that hes better getting something else from the start. i have the 75mm too, its very sensative to how its clocked, etc.

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