Post up your cold air intakes and experience? Looking for better mpg

[ShadowsPapa]

I knew that there was a lower intake on the side. What I didn’t realize was how loud the intake was when you have the fender liner off. It surprised me when I started my jeep to pull it in the garage for the night when I was in the middle of working on it. When I replaced the bumpers and added lights and a winch I pulled my damage fender liner off and didn’t replace it with a new one till I was done. I’m not sure how much it helped with the winch wiring, but it certainly didn’t hurt.

My fender liners are coming off when I re-wire my 25 for winch and snow plow lighting and controls.
I didn't realize how stupid-simple it was to access those connectors for the turn and parking lights with the fender liner even just pulled back 3/4 of the way - I did that to remove the clear turn signals and wiring. Wish I had done that for the install. What a breeze - and only broke one "christmas tree" - no biggy, I have a drawer full of them.

Sponsored

 

[suspension]

Nice. I know they won’t increase power or fuel economy. The one thing that theoretically looks can improve is throttle response. The factory intake elbow is rather small compared to the aftermarket units. I was curious if the increase elbow size would allow for more airflow on demand. Maybe like not actually increase hp but deliver the hp quicker

 

[ShadowsPapa]

Nice. I know they won’t increase power or fuel economy. The one thing that theoretically looks can improve is throttle response. The factory intake elbow is rather small compared to the aftermarket units. I was curious if the increase elbow size would allow for more airflow on demand. Maybe like not actually increase hp but deliver the hp quicker

No.
Too large a tube can actually REDUCE throttle response.
There's a reason Offy had dual-plane intakes years ago - and there were "low-end torque" intakes offered with SMALLER runners to keep the air speed up. Larger tubes make for a lazy mass of air, harder to get it moving again.
Performance builders will explain it but big air tubes, big runners, you lose your low end and throttle response.
A guy with the same exact engine I have in my 73 can put on an intake with smaller runners and single carb and blow around me in town. I can continue on well past his top end, though, at the end of the track.

You are also limited in ours by the throttle body and the actual intake manifold itself. That TB will only flow so many CFM.

 

[NC_Overland]

No.
Too large a tube can actually REDUCE throttle response.
There's a reason Offy had dual-plane intakes years ago - and there were "low-end torque" intakes offered with SMALLER runners to keep the air speed up. Larger tubes make for a lazy mass of air, harder to get it moving again.
Performance builders will explain it but big air tubes, big runners, you lose your low end and throttle response.
A guy with the same exact engine I have in my 73 can put on an intake with smaller runners and single carb and blow around me in town. I can continue on well past his top end, though, at the end of the track.

You are also limited in ours by the throttle body and the actual intake manifold itself. That TB will only flow so many CFM.

Also, a lot of the “throttle response” that people try to improve is to reduce drivetrain clunks. It’s nothing new. My 2008 Z71 5.3l Silverado was horrible about that before I had it tuned to take out the excessive torque management.

 

[ShadowsPapa]

Also, a lot of the “throttle response” that people try to improve is to reduce drivetrain clunks. It’s nothing new. My 2008 Z71 5.3l Silverado was horrible about that before I had it tuned to take out the excessive torque management.

If it's a concern for some people - Banks makes a device for throttle response, changes the curve.

 

[NC_Overland]

If it's a concern for some people - Banks makes a device for throttle response, changes the curve.

Yeah. People use the pedal commander too. The only issue that I have with those devices is that it fools some people into thinking that it gives them more power when it literally doesn’t.

 

[ShadowsPapa]

Yeah. People use the pedal commander too. The only issue that I have with those devices is that it fools some people into thinking that it gives them more power when it literally doesn’t.

Right - it just slides the response along a line. It tunes your brain, not your engine.

 

[suspension]

No.
Too large a tube can actually REDUCE throttle response.
There's a reason Offy had dual-plane intakes years ago - and there were "low-end torque" intakes offered with SMALLER runners to keep the air speed up. Larger tubes make for a lazy mass of air, harder to get it moving again.
Performance builders will explain it but big air tubes, big runners, you lose your low end and throttle response.
A guy with the same exact engine I have in my 73 can put on an intake with smaller runners and single carb and blow around me in town. I can continue on well past his top end, though, at the end of the track.

You are also limited in ours by the throttle body and the actual intake manifold itself. That TB will only flow so many CFM.

I agree when it comes to intake manifolds. Engine masters did a yt video comparing air filters on a big block. Obviously different and not definitive, but an actual results

 

[WILDHOBO]

Corsa makes a very nice one that if paired with the power core filter, will absolutely filter the air better than stock, and probably all other aftermarket options. But I very much doubt any filter change will increase mpg.

 

[ShadowsPapa]

I agree when it comes to intake manifolds. Engine masters did a yt video comparing air filters on a big block. Obviously different and not definitive, but an actual results

The air flow through an engine starts at the air filter and ends at the tip of an exhaust pipe.
It's why I can do a teeny bit better with tall, funnel-shaped air cleaner stacks compared to just a stock air filter housing on my car.

You have to be careful comparing things.

Our engines are also tiny - their ability to pump air is limited. They operate in low-lift mode up to 3,000 RPM. So they aren't even pumping near capacity in most situations. The majority of run time is spent with the intake valves opening only a fraction of full lift.
Small displacement, lower RPM, low intake valve opening and so on - they just don't need the CFM that anything beyond what we have offers.
Another video showing a performance air filter option on a Ford V8 showed a very slight improvement - in RPM over 5,000.
Do you run over 5,000 RPM for any appreciable time?

The air filter on these is actually the same size and capacity as used on slightly larger displacement engines in the past.

You just aren't going to gain on a tiny engine using low volumes of air and that spend much of their lives under 3,000 RPM - even under 2,000 RPM.

If you want MPG - run skinnier lighter tires at the suggested PSI, and drive accordingly. Don't lift it, keep the light bumpers and air dam up front, run a tonneau cover on the bed,
Keep air filters clean, run Top Tier fuel, use the recommended lubricants, keep the oil clean and so on.

 

[suspension]

lol. I’m not worried about mpg or hp. I’m trying to use available hp as soon as possible


probably not the best photo to prove a point. Again, not interested in mpg or hp. I know they won’t gain. Just am curious if there is a throttle response improvement. Not interested in a throttle controller either. I had one on a different vehicle and would intermittently set a tbody plausibility fault code putting the vehicle in limp home mode. Which cold air did you have?

 

[ShadowsPapa]

lol. I’m not worried about mpg or hp. I’m trying to use available hp as soon as possible. Also, that

probably not the best photo to prove a point. Again, not interested in mpg or hp. I know they won’t gain. Just am curious if there is a throttle response improvement. Not interested in a throttle controller either. I had one on a different vehicle and would intermittently set a tbody plausibility fault code putting the vehicle in limp home mode. Which cold air did you have?

You won't change throttle response either. These are actually set in such way that response is deliberately delayed.
If you had one of the certain throttle re-mappers out there, yeah, they have been known to throw codes and cause trouble. IF I was so inclined to get better throttle response, I'd only go with the Banks unit. They are totally different in many ways.

I know enough about engines, response, intakes, filters and so on from decades of experience in stock and performance vehicles. I know enough to have not even wasted my money on a cold air intake since they already get cool air, and I know where the restrictions are and are not.
It's what I've done since the 1970s.
Funny thing - when I ordered my last JTs, even the sales guy going down the list of options said right out "no cold air intake, right?"
Right.
Take a deep dive into how the throttles are mapped on these. You might be amazed.
Again, since they are on low intake lift up to 3,000 RPM - the response will be sloppy below that level, aside from the fact that the pedal is programmed to delay said response.

Sponsored