Cold Air Intake my A**
Champion
Joined: Feb 2005
Posts: 3,710
Likes: 2
From: Skagit County, WA
RE: Cold Air Intake my A**
ORIGINAL: User2006
today i was doing nothing at work, so we pulled out the OBD II and hooked it up, we gatherd the pcm info and had it displayed, at idle my Intake temp was about 43C (idling in a garage) we reved it up to about 3500 and held it there the intake temp went down to 41C (still idling just reving up)
So as the air sits in the intake it gets hot once you open up the tb and get the air moving, it speeds it up and cools it down, it doesnt have time to get hot..
I predict if i was moving (going about 65-70) with my CAI and Ram air hood, i have cold air being pushed ontop og the filter coming though my hood scoops, and i have air being rushed from the stock area.. as long as you keep the hot air from standing still it is cold air.. one day ill have to take the OBD II out for a spin with my truck and see if i can get some temps will moving. That would be pretty cool.
today i was doing nothing at work, so we pulled out the OBD II and hooked it up, we gatherd the pcm info and had it displayed, at idle my Intake temp was about 43C (idling in a garage) we reved it up to about 3500 and held it there the intake temp went down to 41C (still idling just reving up)
So as the air sits in the intake it gets hot once you open up the tb and get the air moving, it speeds it up and cools it down, it doesnt have time to get hot..
I predict if i was moving (going about 65-70) with my CAI and Ram air hood, i have cold air being pushed ontop og the filter coming though my hood scoops, and i have air being rushed from the stock area.. as long as you keep the hot air from standing still it is cold air.. one day ill have to take the OBD II out for a spin with my truck and see if i can get some temps will moving. That would be pretty cool.
Champion
Joined: Aug 2006
Posts: 3,051
Likes: 6
From: Roanoke, Texas
RE: Cold Air Intake my A**
ORIGINAL: horatio102
I'm a bit lost here, a functional ram air hood seals the hood scoop to the intake tract, yet you've got a CAI not designed for the ram air? Got any pics of the setup?
ORIGINAL: User2006
today i was doing nothing at work, so we pulled out the OBD II and hooked it up, we gatherd the pcm info and had it displayed, at idle my Intake temp was about 43C (idling in a garage) we reved it up to about 3500 and held it there the intake temp went down to 41C (still idling just reving up)
So as the air sits in the intake it gets hot once you open up the tb and get the air moving, it speeds it up and cools it down, it doesnt have time to get hot..
I predict if i was moving (going about 65-70) with my CAI and Ram air hood, i have cold air being pushed ontop og the filter coming though my hood scoops, and i have air being rushed from the stock area.. as long as you keep the hot air from standing still it is cold air.. one day ill have to take the OBD II out for a spin with my truck and see if i can get some temps will moving. That would be pretty cool.
today i was doing nothing at work, so we pulled out the OBD II and hooked it up, we gatherd the pcm info and had it displayed, at idle my Intake temp was about 43C (idling in a garage) we reved it up to about 3500 and held it there the intake temp went down to 41C (still idling just reving up)
So as the air sits in the intake it gets hot once you open up the tb and get the air moving, it speeds it up and cools it down, it doesnt have time to get hot..
I predict if i was moving (going about 65-70) with my CAI and Ram air hood, i have cold air being pushed ontop og the filter coming though my hood scoops, and i have air being rushed from the stock area.. as long as you keep the hot air from standing still it is cold air.. one day ill have to take the OBD II out for a spin with my truck and see if i can get some temps will moving. That would be pretty cool.
I have pics they should be posted in my gallery. If not ill post some up.
also i say functional hood becuase my hood actually has an opening for the air to flow through. A lot of people think my hood is just for looks.. but its not it actually works.
Professional
Joined: Dec 2005
Posts: 115
Likes: 0
From:
RE: Cold Air Intake my A**
OK, I know I am going to be in the minority here, but based on the various setups I have tried on my D as well as previously on my Ram I am now convinced that the stock set up (at least on the 4.7) with a good flowing filter is the best way to go. It draws air in from a cold source and flows plenty of air to feed the engine. My Fastman actually works better now with the stock intake back on rather than with an Air Raid type set up (which is similar to the True Flow intake system that so many people are buying now). The K and N type intakes and the cheapy Ebay ones draw in more warm air than the stock set up and are prone to heat soak. I know there will be plenty of you who will swear up and down that your aftermarket "CAI" made a dramatic improvement, but I am saying that based on my own experience that the stock set up works just fine for normally aspirated/mildly modified engines. I have discussed this with a couple of mechanics (with a combined 50 plus years of experience) and they have told me basically the same thing. I believe there are some tests out there showing little to no gain from aftermarket CAI's compared to the stock intake. Just my 2 cents
Champion
Joined: Aug 2005
Posts: 3,313
Likes: 8
RE: Cold Air Intake my A**
Maybe one in one hundred CAI buyers actually test how well the truck accelerates before and after they have spent the several hundred $.
Only one in one thousand actually tests how well the CAI does
in an accurate way,
although the MegaSquirt guys have made it easy to test for
horsepower and torque gains out on 'real world' roads with your
vehicle at very low cost:
http://www.bgsoflex.com/dyno.html
Only one in one thousand actually tests how well the CAI does
in an accurate way,
although the MegaSquirt guys have made it easy to test for
horsepower and torque gains out on 'real world' roads with your
vehicle at very low cost:
http://www.bgsoflex.com/dyno.html
Champion
Joined: Feb 2005
Posts: 3,710
Likes: 2
From: Skagit County, WA
RE: Cold Air Intake my A**
ORIGINAL: jalapeenoz
OK, I know I am going to be in the minority here, but based on the various setups I have tried on my D as well as previously on my Ram I am now convinced that the stock set up (at least on the 4.7) with a good flowing filter is the best way to go. It draws air in from a cold source and flows plenty of air to feed the engine. My Fastman actually works better now with the stock intake back on rather than with an Air Raid type set up (which is similar to the True Flow intake system that so many people are buying now). The K and N type intakes and the cheapy Ebay ones draw in more warm air than the stock set up and are prone to heat soak. I know there will be plenty of you who will swear up and down that your aftermarket "CAI" made a dramatic improvement, but I am saying that based on my own experience that the stock set up works just fine for normally aspirated/mildly modified engines. I have discussed this with a couple of mechanics (with a combined 50 plus years of experience) and they have told me basically the same thing. I believe there are some tests out there showing little to no gain from aftermarket CAI's compared to the stock intake. Just my 2 cents
OK, I know I am going to be in the minority here, but based on the various setups I have tried on my D as well as previously on my Ram I am now convinced that the stock set up (at least on the 4.7) with a good flowing filter is the best way to go. It draws air in from a cold source and flows plenty of air to feed the engine. My Fastman actually works better now with the stock intake back on rather than with an Air Raid type set up (which is similar to the True Flow intake system that so many people are buying now). The K and N type intakes and the cheapy Ebay ones draw in more warm air than the stock set up and are prone to heat soak. I know there will be plenty of you who will swear up and down that your aftermarket "CAI" made a dramatic improvement, but I am saying that based on my own experience that the stock set up works just fine for normally aspirated/mildly modified engines. I have discussed this with a couple of mechanics (with a combined 50 plus years of experience) and they have told me basically the same thing. I believe there are some tests out there showing little to no gain from aftermarket CAI's compared to the stock intake. Just my 2 cents
Professional
Joined: Dec 2005
Posts: 115
Likes: 0
From:
RE: Cold Air Intake my A**
Yes I meant K and N CAI ( and similar intakes that have a tube and an open filter hanging over the engine compartment). As I said this is my own experience that I have had on a couple of different vehicles. Not only did I not notice an improvement with aftermarket set ups, in some cases I actually felt a decrease in performance. I believe Hank has some links to some actual dyno tests that prove the same thing. IMHO you could put the couple hundred bucks toward something else that would give you more significant gains.