Jump to content

My Intake Mod

Spurshot

By Spurshot
in Engines & Drivetrain

Recommended Posts

Spurshot Senior Enthusiast

Spurshot

Posted
  • Author
Posted

Higgs
You could get over 20 mpg in a 1974 smallblock vette. Those cars have a built in tailwind. Trucks are a different animal. Built in headwind.

  • Replies 102
  • Created
  • Last Reply
Spurshot Senior Enthusiast

Spurshot

Posted
  • Author
Posted

Seems like a lot of work, for not much noticeable gain. I just installed the Airaid MIT on my 5.3L. Cost $135 shipped from Amazon. I have Corsa Exhaust on my truck and I didn't notice much difference in noise from the engine after installing the Airaid. But I did notice better throttle response. Maybe even a small boost in MPG. The jury is still out on the MPG.

I guess I didn't think this was much work, as I like working on the truck. Kind of like therapy. And I need therapy. I spent most of the time trying to make sure I didn't break any electrical connectors, taking pictures, and getting the harness attached to the back of the manifold sound cover loose. The actual changing of the manifold and throttle body was not long or hard, if you've done any engine work. No coolant, fuel, or oil runs thru the manifold. Just plastic clips and electrical connectors to undo.

 

As far as how much gain it made, i don't want to portray it bigger than it is. Also, I think it's acting like it's extremely lean above 5000 rpm, since it just flattens out. I'll put my diagnostic tool on it today to see. Being lean is understandable.

fondupot Senior Enthusiast

fondupot

Posted
Posted

I guess I didn't think this was much work, as I like working on the truck. Kind of like therapy. And I need therapy.

 

As far as how much gain it made, i don't want to portray it bigger than it is. Also, I think it's acting like it's extremely lean above 5000 rpm, since it just flattens out. I'll put my diagnostic tool on it today to see. Being lean is understandable.

 

Time for a Blackbear tune... :thumbs:

Spurshot Senior Enthusiast

Spurshot

Posted
  • Author
Posted

Time for a Blackbear tune... :thumbs:

Soon as I put the cam in.

Higgs Boson Enthusiast

Higgs Boson

Posted
Posted

Higgs

You could get over 20 mpg in a 1974 smallblock vette. Those cars have a built in tailwind. Trucks are a different animal. Built in headwind.

 

 

I get 30+ hwy in the Vette. I get 20-22 hwy in the truck. I get around 14-15 mixed driving in the truck (and the Vette).

Spurshot Senior Enthusiast

Spurshot

Posted
  • Author
Posted

 

I get 30+ hwy in the Vette. I get 20-22 hwy in the truck. I get around 14-15 mixed driving in the truck (and the Vette).

 

That's amazing stuff. They've come a long way.

Chris Senior Enthusiast

Chris

Posted
Posted

Soon as I put the cam in.

Better order it now. That way you will have it in 3 weeks when you put it in
Spurshot Senior Enthusiast

Spurshot

Posted
  • Author
Posted

Better order it now. That way you will have it in 3 weeks when you put it in

 

I'll just drive down to see Justin. No mail order for me. Maybe we can get some dyno time in Temecula or SD.

Chris Senior Enthusiast

Chris

Posted
Posted

 

I'll just drive down to see Justin. No mail order for me. Maybe we can get some dyno time in Temecula or SD.

Just get the autocal qith multiple tunes
WendysOrBust Enthusiast

WendysOrBust

Posted
Posted

I guess I didn't think this was much work, as I like working on the truck. Kind of like therapy. And I need therapy. I spent most of the time trying to make sure I didn't break any electrical connectors, taking pictures, and getting the harness attached to the back of the manifold sound cover loose. The actual changing of the manifold and throttle body was not long or hard, if you've done any engine work. No coolant, fuel, or oil runs thru the manifold. Just plastic clips and electrical connectors to undo.

 

As far as how much gain it made, i don't want to portray it bigger than it is. Also, I think it's acting like it's extremely lean above 5000 rpm, since it just flattens out. I'll put my diagnostic tool on it today to see. Being lean is understandable.

 

My engine tuning skills are pretty non-existant, but I would assume that's a good problem to have no? Correcting this with a tune would yield good top-end gains?

Spurshot Senior Enthusiast

Spurshot

Posted
  • Author
Posted

I took it out again. I did see it threw a code yesterday. I found I had a loose connector on the MAP sensor. Hooked it up, cleared the code and drove a bit. Freeway, streets etc.

 

I'm seeing a lot different feel in the pedal. The part throttle required is much less pedal for the normal driving, making it 'feel' more responsive. That makes sense. Larger hole, same butterfly angle/pedal position = more air flow, more fuel, etc. No surprise.

 

It does feel better in the 5000-5500 range where it fell flat until I hooked up the MAP sensor.

 

I hooked up my Dashcommand and plugged in the GoPoint BT1A OBD2 Bluetooth transceiver. It says the WFO mixture at about 5000 is 11.7:1 I'm not sure I believe it. Sounds a bit rich.

 

I haven't driven a CAI (only) equipped truck, so I can't say this is more or less improvement than a CAI.

 

I'm not sure any 1/4 mile or 0-60 data would mean anything to others, since my truck has about 950 lbs above the curb weight in it and 12.50 x 33 tires. From what I can tell, the curb weight is 5300 or maybe more, since I have 6 1/2 ft CC

Higgs Boson Enthusiast

Higgs Boson

Posted
Posted

It is reporting the commanded AF ratio, not actual, and yes they are programmed that rich from the factory.

 

There is no way to know what the actual full throttle AF ratio is without a wideband, there is nothing in the computer that measures it (Ford's use widebands right from the factory).

Spurshot Senior Enthusiast

Spurshot

Posted
  • Author
Posted

It is reporting the commanded AF ratio, not actual, and yes they are programmed that rich from the factory.

 

There is no way to know what the actual full throttle AF ratio is without a wideband, there is nothing in the computer that measures it (Ford's use widebands right from the factory).

 

Based on what I was seeing during deceleration with the throttle closed and the other times, I'd agree, it must be commanded AFR rather than measured. I don't know what a wideband is. Can you explain? I know what an emulsion tube is and an air correction jet, but this modern electronic stuff has some nuances I've not dealt with.

Chris Senior Enthusiast

Chris

Posted
Posted

 

Based on what I was seeing during deceleration with the throttle closed and the other times, I'd agree, it must be commanded AFR rather than measured. I don't know what a wideband is. Can you explain? I know what an emulsion tube is and an air correction jet, but this modern electronic stuff has some nuances I've not dealt with.

Wideband is basically an O2 sensor that can read actual AFR.
Spurshot Senior Enthusiast

Spurshot

Posted
  • Author
Posted

Got a request for part numbers...

 

12639087 - MANIFOLD $110

12620263 - THROTTLE BODY $100

12626354 - MANIFOLD GASKET $2 (8 required)

12639086 - GASKET, THR BDY $5 (1 required)

 

20931028 20931028 / OUTLET DUCT $71

Archived

This topic is now archived and is closed to further replies.

Go to topic listing

  • Latest Articles

  • Posts

    • Chuck FB
      2 speed transfer case optional now?

      By Chuck FB · Posted

      Yes, and also pulling heavy trailers or a large camper up steep grades as well as descending grades such as the more rustic off road camping locations and using engine braking with that low gearing as well as soft ground can just suck the power . I realize pickups these days tend to have an over all lower first gear ratio compared to automatic transmission pickups from years back so that has helped a lot in its ability in high range but there comes a point if in four wheel drive the torque runs out at the wheels, certainly with a gas engine. They don't put two speed transfer cases on pickups for a cool factor, they have a function if one needs that massive torque to the wheels that high range can't deliver. 
    • Grumpy Bear
      Grumpy Bears 2015 Silverado 2WD

      By Grumpy Bear · Posted

      Notes 7/18/2026   3,400 miles on this batch of Mobil 1 Euro 5W40 since the GDI pump replacement. Alcohol runs very clean when ring seal is tight and the sump isn't getting hosed with fuel. Checked oil level at fill up today as is my practice and grabbed a white Kleenex to look at the color. What color?  I was going to change it but.....  
    • Another JR
      2 speed transfer case optional now?

      By Another JR · Posted

      4 low is really nice on steep boat ramps. 
    • Chuck FB
      Gas Prices

      By Chuck FB · Posted

      Interesting, I suspect I would have fueled up in Lee Vining as the day prior I would have filled up either in Laughlin or near there and maybe again before I entered Death Valley and once out the other side late that evening as I kept on driving into the night up near Lee Vining. Next morning I most likely fueled up in LV before heading over Tioga Pass into ( as I refer to it as "Yose .... Mite" 😁 ). And again that was 19 years ago but the price then must not have jumped out at me like the 5 bill a gallon theme of nutty cult hippy country Big Sir or head so far up their rear Aspen. I'd be curious to know where the highest prices are in the lower 48, I probably would not be far off to guess somewhere in Cali forn ie. Coldfoot and Prudhoe bay may have those prices beat but that is a whole other world up there and when prices are more normal elsewhere that is about what they can be up there I believe in no mans land. Anyway interesting that the 395 corridor is hosing people and the thing is, its tourist season and its not like there are a lot of competition options when driving up that highway from what I could see. Yup, big ole Boaterhomes and various other RV's ahead and behind me at the Yosemite entrance gate and they have to get their fuel somewhere.  
    • Atlas
      Gas Prices

      By Atlas · Posted

      Those can be high, as well as the big California cities. The ones that will pop your eyes out are the 395 corridor on the Eastern side of the Sierra Nevadas. Lee Vining, $7.19 for regular and $8.89 for diesel is what the Google said right now.

  • GM-Trucks.com Clubs

  • Popular Contributors

×
×
  • Create New...