Would a bigger MAF be worthwhile on a stocker??

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stangsman

Member

Nov 24, 2003

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Mar 6, 2004

#1

• Mar 6, 2004

• #1

I have a '95 gt and was thinking of adding a C&L 73mm with C&L truflow alum pipe and k&n filter for the stock 19lb injectors. Just want to know if this is a worthwhile upgrade. Would I feel any difference as I intend to keep the stock tb. Or would the set up be any more effective with the bigger 65mm tb. I was thinking that with a stock motor, a too big MAF would create too large mass of air that would bottleneck at the point of the stock tb. For this reason, I consider the C&L 73 rather than a Pro-M 77. Let me know if my thinking is wrong and to stick with the better Pro-M piece. Or, just ditch the whole idea and just install a k&n filter. I've already uncorked the exhaust with long tubes, matching h-pipe with converters and a catback. I don't want to lose any low end torque. Any input would be greatly appreciated. Besides the headers, the rest of the motor is completely stock.
Stangsman: pro 5.0 shifter, 3.73's, l/t headers, h-pipe w/converters, mac catback, 14deg timing

 

silverGTSaleen

New Member

Apr 6, 2003

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Texas!

Mar 7, 2004

#2

• Mar 7, 2004

• #2

Dang good question, Id like to know also

 

95BLBLVert

Founding Member

Nov 2, 1999

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Lake Wylie, SC

Mar 7, 2004

#3

• Mar 7, 2004

• #3

A larger throttle body, like a 65 mm, on a totally stock motor will not benefit without better exhaust flow. Plus the stock heads limit airflow as well. Since you do have exhaust mods, a 65 mm may benefit you. A larger maf will definitely benefit you. Actually the air will not bottle neck as you say. Air speed increases from a larger diameter pipe to a smaller one. The maf should always be larger than the throttle body (naturally aspirated). I use the 76mm Trueflow and a 65mm tb with great results.

 

Zero Signal

Active Member

Feb 24, 2003

2,633

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Tucson, AZ

Mar 7, 2004

#4

• Mar 7, 2004

• #4

I don't think a larger MAF will do much of anything untill you get into the major mods like H/C/I or blown stuff. Untill you hit probably in the high 200, low 300hp range I don't see the point of getting one larger than 65mm, an aftermarket 65 could be benificial since our stock 65 has a the really big sampling tube which may be restrictive, which I think is why people say go one size larger than the TB. But I wouldn't bother buying an aftermarket one untill you actually know that that is your bottleneck.

 

S/CBlack95GT

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Apr 6, 2003

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Tampa Palms, FL

Mar 7, 2004

#5

• Mar 7, 2004

• #5

I would not get a MAF until you do more, such as heads and an intake. If you order a MAF for 19# you will eventually want to recal it for 24# or bigger. You could get 24# injectors and a 24# MAF. That would cost more but it would prepare you for the future, unless you don't plan on modifying. At any rate I would get a Pro-M. The 80mm is around $300.

 

HoofnIt

Founding Member

Jan 8, 2001

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North Carolina

Mar 7, 2004

#6

• Mar 7, 2004

• #6

Air speed increases from a larger diameter pipe to a smaller one.

This statement is not true. Actually, it is the opposite. As the diameter is decreased, the velocity is increased. Think of putting your thumb over the end of the hose with water running out. The more your thumb covers the hose opening, the faster the water shoots out. The speed of the incoming air is not as important as the volume of air that it can allow in; measured in CFM or cubic feet per minute

Stock meter 70mm - flows about 815 CFM
80mm Pro M - flows 1612 CFM

 

swingline

New Member

Sep 18, 2003

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TCB - Taking Care of Business

Mar 7, 2004

#7

• Mar 7, 2004

• #7

A new one won't hurt but you might want to hold off until you know what you are doing with your car. If you do H/C/I then you are going to want bigger injectors; so buying a new MAF for you 19lbs will be throwing your money away.

 

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yellow1995Cobra

New Member

Dec 23, 2002

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Massachusetts

Mar 7, 2004

#8

• Mar 7, 2004

• #8

Yea i wouldnt bother with a MAF right now. I ran my times in sig with a stock MAF. I also had a pro-m 75mm at the time, and i swapped back and forth a few times, never noticed any difference. The car ran better with the stocker, thats why i kept it on.

I would make your own CAI out of pvc, cheap, easy, and it works. Otherwise, start saving for an intake manifold.

 

final5-0

Mustang Master

Apr 6, 2003

6,817

12

79

DFW Texas

Mar 7, 2004

#9

• Mar 7, 2004

• #9

I agree with those who advised to wait until later.

Look at my sig for an example. Maybe it will help.

Later
Grady

 

silverGTSaleen

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Apr 6, 2003

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Texas!

Mar 7, 2004

#10

• Mar 7, 2004

• #10

So if somone has the Stock MAF but buys an after throttle body they will have gains, correct? If so about how much?

 

GTJake

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Oct 28, 2002

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Ann Arbor, MI

Mar 7, 2004

#11

• Mar 7, 2004

• #11

Not worth it with stock heads, cam.

Jake

 

swingline

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Sep 18, 2003

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Mar 7, 2004

#12

• Mar 7, 2004

• #12

So if somone has the Stock MAF but buys an after throttle body they will have gains, correct? If so about how much?

Click to expand...

I noticed a slight difference when I put on my 65mm FRPP throttle body but it also went on with CAI and a Cobra intake. I have the stock MAF and will keep it until I pound out what mods I am going to do.

 

GTJake

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Oct 28, 2002

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Ann Arbor, MI

Mar 7, 2004

#13

• Mar 7, 2004

• #13

Mostly all of the gain you felt would be from the Cobra intake. I would be suprised for a TB to give more than 5rwhp on a stock heads, cam car.

Jake

 

swingline

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Sep 18, 2003

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Mar 7, 2004

#14

• Mar 7, 2004

• #14

In all honesty, I don't feel that big of a difference with the Cobra. I am still running stock heads and cam though.

 

S

stangsman

Member

Nov 24, 2003

45

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Mar 8, 2004

#15

• Mar 8, 2004

• #15

Thanks

Thanks for all your input guys. I have 90K miles on the stang and I would like for one day do a total rebuild. So I'm keeping it a stocker for now. But I would like to build my own CAI. I've seen many threads on the subject, but can anyone tell me how I would incorporate the IAT sensor and breather hose in the set up and would I have to do any cutting to the inner fender?
Thanks