Air Raid MIT Fuel Milage

tyrich88 · November 16, 2016

Slap a higher flow air filter in there and get a cat back exhaust.
MPG will go way down... but because it's so much more fun to put your foot into!

On a serious note. Mine helped me. But i put the tube on and a k&n filter.

I also have a custom 3" exhaust to 14" magnaflow and cut out the third cat.

I am running 10 ply 275/70/18 (33.25") KO2's and I still get 19 on the highway without a tune.

Grumpy Bear · November 16, 2016

Easy fellas. Winter brings down the fuel efficiency for all ICEs'. Lubricants are thicker making warmups longer. Trips are usually shorter. Check you tire pressure lately? Lots of reasons and none of them have anything to do with your air box or filter.

I'm going to give this stop and go, idling temp thing some attention over the next few days and get back to ya.

bdm62987 · November 16, 2016

Yall summed all my thoughts as to why and it makes sense, only thing I could do is upgrade the filter but is it really worth it? The truck has 10k miles

tyrich88 · November 16, 2016

Yall summed all my thoughts as to why and it makes sense, only thing I could do is upgrade the filter but is it really worth it? The truck has 10k miles

Yes it is.

The air flow through the two, some say is negligible. If for nothing else, the throttle response you get is worth it in my opinion.

My mpg numbers went up a smidge too. but only by .5 to 1 mpg on average.

Grumpy Bear · November 17, 2016

I'm going to give this stop and go, idling temp thing some attention over the next few days and get back to ya.

Is it okay to quote yourself? And it didn't take days. Just some errands to run. Yep stop and go and long idle raised the inlet temp nearly 20F. Dropped again when moving at a steady pace. Nothing I see there takes it out of the ECU's base map nor did it ever go open loop.

I've run these tube type inlets on some other cars over the last 20 years and found nothing in and of itself that had me rushing to by one for my current new truck. That said the filter itself is light years ahead of the GM part in filter efficiency. That is protection. And that said I buy and use K&N factory replacement filters saving allot of money and reaping the benefits of better filtration. But hey, that's my preference and experience. For what it's worth.

Rawyzf · November 17, 2016

Best part of the MIT is that you remove that huge factory pipe that looks like a table. After that is gone, you can finally see and reach into the engine bay.

Oh, and if you are after a decent filter for the stock airbox, I use these: http://m.ebay.com/itm/141543086069?_trksid=p2057872.m2749.l2649&_mwBanner=1

Sent from my SM-G930V using Tapatalk

SouthernSilveradoGuy85 · November 17, 2016

Best part of the MIT is that you remove that huge factory pipe that looks like a table. After that is gone, you can finally see and reach into the engine bay.

Oh, and if you are after a decent filter for the stock airbox, I use these: http://m.ebay.com/itm/141543086069?_trksid=p2057872.m2749.l2649&_mwBanner=1

Sent from my SM-G930V using Tapatalk

That's the main reason I got the M.I.T. was to be able to get to stuff without taking the air intake off.

As for the OP, I've seen tests on here that say the M.I.T. with the factory filter actually flows better than an aftermarket performance filter. If a filter does flow more then I would think it means it's not filtering as well. So I'm fine with the M.I.T. and a normal filter.

Grumpy Bear · November 17, 2016

That's the main reason I got the M.I.T. was to be able to get to stuff without taking the air intake off.

As for the OP, I've seen tests on here that say the M.I.T. with the factory filter actually flows better than an aftermarket performance filter. If a filter does flow more then I would think it means it's not filtering as well. So I'm fine with the M.I.T. and a normal filter.

So...your saying...if I have 500 inches squared filter area that flows 500 cfm and traps to 1 micro it isn't as good as 100 inches squared filter area flowing 400 cfm filtering only to 5 micron?

See, that's the problem with isolating a single piece of information and removing it from it's context. Makes perfect sense standing alone then falls apart when the entire picture is seen.

Air rate and filtration size are not the same thing nor do they share a mutual relationship. Air rate and inches squared filter area only have a relationship if they share every aspect of the medias design and build.

Your statement, as presented, says to me that a soda straw unrestricted flows more air and filters smaller particulate than a thousand square inches of oiled cotton cloth simply because the larger area filters better? You sure?

BTW E-bay filter in post #21 looks to be a K&N equivalent at first blush.

SouthernSilveradoGuy85 · November 17, 2016

So...your saying...if I have 500 inches squared filter area that flows 500 cfm and traps to 1 micro it isn't as good as 100 inches squared filter area flowing 400 cfm filtering only to 5 micron?

See, that's the problem with isolating a single piece of information and removing it from it's context. Makes perfect sense standing alone then falls apart when the entire picture is seen.

Air rate and filtration size are not the same thing nor do they share a mutual relationship. Air rate and inches squared filter area only have a relationship if they share every aspect of the medias design and build.

Your statement, as presented, says to me that a soda straw unrestricted flows more air and filters smaller particulate than a thousand square inches of oiled cotton cloth simply because the larger area filters better? You sure?

BTW E-bay filter in post #21 looks to be a K&N equivalent at first blush.

I'm just going by what I've read on here with test. I'm sure the air flow didn't include the surface area of the filter, but the rate of flow per square inch or something along those lines.I'd rather it filter better than give me 2 HP. And before you say they give more HP than 2, the HP they give is with a cold engine bay. Once the engine bay warms up to operating temps the HP drops down to around 2 (give or take 1). That's after seeing a video of a test where they did 3 runs with a K&N I believe. The first run was close the the advertised HP, but it was a cold start up. The more runs they did the HP dropped. I had a full K&N intake kit on my '98 and too be honest, I think it was just all in my head when I thought it gave way better throttle response. Especially since the stock filter was one of those huge cylinder filters.

Grumpy Bear · November 17, 2016

I'm just going by what I've read on here with test. I'm sure the air flow didn't include the surface area of the filter, but the rate of flow per square inch or something along those lines.I'd rather it filter better than give me 2 HP. And before you say they give more HP than 2, the HP they give is with a cold engine bay. Once the engine bay warms up to operating temps the HP drops down to around 2 (give or take 1). That's after seeing a video of a test where they did 3 runs with a K&N I believe. The first run was close the the advertised HP, but it was a cold start up. The more runs they did the HP dropped. I had a full K&N intake kit on my '98 and too be honest, I think it was just all in my head when I thought it gave way better throttle response. Especially since the stock filter was one of those huge cylinder filters.

I think we have our wires crossed. Likely my fault. Nope I'm not going to tell you anything about HP. And I agree that the most important job being done is indeed air filtration. Actually its the point I've tried to make although is seems clumsy at best. Sorry.

bdm62987 · December 7, 2016

Put the stock tube back on and I averaged around 17-17.9 for about a week. Put the MIT back on and now my average is 16.5-17.2 and the truck is in V8 mode more often especially on the highway where the stock box would be in V4. Is the stock filter holding this thing back? Don't see having $150 under the hood for a little more throttle response.