Cold Air intake and MAP
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4wd Low
Joined: Jan 2023
Posts: 10
Likes: 1
From: Arizona
Cold Air intake and MAP
I recently had some work done on the 91 F150 (5.0) and have a nice open catback exhaust. (also new timing chain and water pump, seals, and other stuff) - The airbox is due to be replaced next and I was thinking of doing a cold air intake mod and getting some K&N pods for it. (the original airbox is, as seems common for the age, cracked and all the bolts are broken and it just sorta sits there with the filter hopefully doing something)
This is way before OBDII, and I have no real idea what's going on with the mass airflow sensor (I'm assuming I have one) or what I may have to tweak. What's my best route forward?
This is way before OBDII, and I have no real idea what's going on with the mass airflow sensor (I'm assuming I have one) or what I may have to tweak. What's my best route forward?
Hotshot
Joined: Jun 2015
Posts: 12,783
Likes: 2,422
No mass air flow sensor on that truck from the factory. Your best option is to procure a good used air filter assembly from the junkyard. One modification is to use the intake tube from a 300/460 truck which draws air from behind the grill instead of between the core support and hood.
Logistics Pro
Joined: Aug 2010
Posts: 3,716
Likes: 583
From: Chillicothe
No mass air flow sensor on that truck from the factory. Your best option is to procure a good used air filter assembly from the junkyard. One modification is to use the intake tube from a 300/460 truck which draws air from behind the grill instead of between the core support and hood.
The 460 uses the same airbox and filter. It will flow more than enough for your engine. Just find a good used one.
Thread Starter
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4wd Low
Joined: Jan 2023
Posts: 10
Likes: 1
From: Arizona
Do you mean that there *is* a K&N intake - like onvthe mustang forums or something (I know that the answer to this questions would be very different if it was 91 mustang 5.0 because people perceive performance metrics differently)
Or do you mean that the washable K&N filters aren't worth the money?
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4wd Low
Joined: Jan 2023
Posts: 10
Likes: 1
From: Arizona
But it looks like the answer to the question- if I have to spend that much money, is aftermarket worth doing? is no for truck engines.
Logistics Pro
Joined: Aug 2010
Posts: 3,716
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From: Chillicothe
That's a problem. The one junkyard I know has one in the phoenix area seems to always revise their quotes upwards once you have the part in hand (desert valley) and it ends up looking like it's going to be over $200 to redo the box, lid, intake hose. (and that's if I can get them to give me the mounting bolts, which is unlikely)
But it looks like the answer to the question- if I have to spend that much money, is aftermarket worth doing? is no for truck engines.
But it looks like the answer to the question- if I have to spend that much money, is aftermarket worth doing? is no for truck engines.
Im sure one of them can help you
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Logistics Pro
Joined: Aug 2014
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I did a test a while ago, with K&N recharge filter vs fram paper filter, stock air box, 4.9 inlet vs 5.0/5.8 inlet.
I recorded air charge temperature, hp and tq.
The results proved that after market intake on these trucks is a big NO, waste of money that could be better spent.
Stock air box with paper filter, and the 4.9/7.5 intake duct is the BEST.
Then to improve on that, get some reflextic insulation, and wrap the tubes and air box to keep the air colder.
1994 Ford Bronco insulating air box and intake tube pictures, videos, and sounds | SuperMotors.net
I recorded air charge temperature, hp and tq.
The results proved that after market intake on these trucks is a big NO, waste of money that could be better spent.
Stock air box with paper filter, and the 4.9/7.5 intake duct is the BEST.
Then to improve on that, get some reflextic insulation, and wrap the tubes and air box to keep the air colder.
1994 Ford Bronco insulating air box and intake tube pictures, videos, and sounds | SuperMotors.net
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Thread Starter
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4wd Low
Joined: Jan 2023
Posts: 10
Likes: 1
From: Arizona
Well, that's a lot more helpful than calling whatever shows up on maps. thanks!
Thread Starter
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4wd Low
Joined: Jan 2023
Posts: 10
Likes: 1
From: Arizona
I did a test a while ago, with K&N recharge filter vs fram paper filter, stock air box, 4.9 inlet vs 5.0/5.8 inlet.
I recorded air charge temperature, hp and tq.
The results proved that after market intake on these trucks is a big NO, waste of money that could be better spent.
Stock air box with paper filter, and the 4.9/7.5 intake duct is the BEST.
Then to improve on that, get some reflextic insulation, and wrap the tubes and air box to keep the air colder.
1994 Ford Bronco insulating air box and intake tube pictures, videos, and sounds | SuperMotors.net
I recorded air charge temperature, hp and tq.
The results proved that after market intake on these trucks is a big NO, waste of money that could be better spent.
Stock air box with paper filter, and the 4.9/7.5 intake duct is the BEST.
Then to improve on that, get some reflextic insulation, and wrap the tubes and air box to keep the air colder.
1994 Ford Bronco insulating air box and intake tube pictures, videos, and sounds | SuperMotors.net
Logistics Pro
Joined: Aug 2014
Posts: 3,553
Likes: 848
Air flow did not change, the air charge temperature is the factor.
Air temperature vs RPM and HP/TQ vs RPM:
Make a Cold Air Intake from OEM Ford Parts - Page 2 - Ford Truck Enthusiasts Forums (ford-trucks.com)
Air temperature vs RPM and HP/TQ vs RPM:
Make a Cold Air Intake from OEM Ford Parts - Page 2 - Ford Truck Enthusiasts Forums (ford-trucks.com)
Hotshot
Joined: Sep 2001
Posts: 11,958
Likes: 228
I'm not aware of a K&N intake in my searches for this year and model. What part number is that? I've seen generic pods - which I mentioned replacing the filter units on with K&N - and the's an Banks intake replacement that looks more or less like a sturdier OEM one. (not sure if it includes the actual lower tube) It's about the same price as me finding a really good condition complete assembly at a junkyard.
Do you mean that there *is* a K&N intake - like onvthe mustang forums or something (I know that the answer to this questions would be very different if it was 91 mustang 5.0 because people perceive performance metrics differently)
Or do you mean that the washable K&N filters aren't worth the money?
Do you mean that there *is* a K&N intake - like onvthe mustang forums or something (I know that the answer to this questions would be very different if it was 91 mustang 5.0 because people perceive performance metrics differently)
Or do you mean that the washable K&N filters aren't worth the money?
Logistics Pro
Joined: Aug 2014
Posts: 3,553
Likes: 848
Performance Air Intake System (knfilters.com)
Thread Starter
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4wd Low
Joined: Jan 2023
Posts: 10
Likes: 1
From: Arizona
For ****z and giggles: K&N 57-2542 FIPK air intake system
Performance Air Intake System (knfilters.com)
Performance Air Intake System (knfilters.com)
What I was initially looking at, but it doesn't seem to include any actual intake, was the Banks 49216. But that's a lot for a grey plastic cover
https://www.summitracing.com/parts/gbe-49216
Logistics Pro
Joined: Aug 2010
Posts: 3,716
Likes: 583
From: Chillicothe
$800 for a pair? or are you supposed to just hook one side of the intake up? that's ... isnane.
What I was initially looking at, but it doesn't seem to include any actual intake, was the Banks 49216. But that's a lot for a grey plastic cover
https://www.summitracing.com/parts/gbe-49216
What I was initially looking at, but it doesn't seem to include any actual intake, was the Banks 49216. But that's a lot for a grey plastic cover
https://www.summitracing.com/parts/gbe-49216