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Cold Air vs. Short Ram

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  • Cold Air vs. Short Ram

    I know this question has been debated for a long time but i still wanna know, for a B17A1, which is better? Please give advantages and disadvantages of each.

  • #2
    cold air is always better.

    cold air is denser than warm there. meaning that per volume cold air contains more molecules of oxygen. The more oxygen molecules you can get into the cylinders the better. Because more oxygen means more of an "explosion" when the air/fuel mixture is ignited.


    there may be some instanced where the differences in diameter, filter, and piping length between a short ram and a cai will make differences in power. So a poorly designed cai might not perform as a well designed short ram. But most intakes out there are basically the same, its hard to say that the design of one or another will yeild much of an affect.

    so, just remember colder/denser air is better. (thats why you'll run faster times when its colder outside, or if you're closer to sea level)
    Track Project DB2 #896
    LeMons Project DA9
    My OG DA9, Wrecked, Stripped, R.I.P

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    • #3
      I've got a semi-related question. The cold air intake setup on our cars requires the filter to be placed in the spot where the resonator was, hence drawing air from that area. From what I can remember, there's not much of an opening for the cold air to be sucked through...as that area is surrounded by the plastic mud guard and inner fender linings. My question is, where is the cold air being drawn from, and is there any way to increase airflow, without removing your plastic coverings everywhere?(besides removing your one bumper light).
      - Darren
      1990 'Whitey' RS R.I.P.
      1991 GS SOLD

      Gone the way of the 4x4

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      • #4
        thats a very good question. and in truth i can't really answer it correctly. It seems like there wouldn't be much access for cold air to enter, but there must be.

        i know that if you measure the temperatures in the cai spot and the sri spot the cai spot will be a decent amount cooler though. So, it does work.

        also, remember that heat rises. So, the heat from your engine bay won't want to fall down into that hole where your resonator was. So, that might have something to do with it.
        Track Project DB2 #896
        LeMons Project DA9
        My OG DA9, Wrecked, Stripped, R.I.P

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        • #5
          Originally posted by 91IntegGS
          also, remember that heat rises. So, the heat from your engine bay won't want to fall down into that hole where your resonator was. So, that might have something to do with it.
          good job! I never thought of it like that....
          LOVE = 1992 Aztec GS-R #000070

          Dwayne

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          • #6
            i think i remember some figure saying that for every 10F reduction in air you get like 1 or 2 hp. so for the DIY 10$ CAI i say whynot. but as for 200 i'd pass
            autozone online repair manual
            http://www.autozone.com/addVehicleId...leSelected.htm

            supplement with haynes manual from pep boys (<$15). includes vital troubleshooting and maintenence schedules.

            pics of all gsr rims

            b-series dynos

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            • #7
              XDEep: i'm not sure where you heard that statement about temperature, but its wrong. General statements like that cannot be made. Because a 10deg drop for our cars will most likely yield a lot less than a 10deg drop for a big muscle car or something.

              however you may be able to make a general statement in the form of a percent increase in hp, instead of a straight number.
              Track Project DB2 #896
              LeMons Project DA9
              My OG DA9, Wrecked, Stripped, R.I.P

              Comment


              • #8
                oh right i think it was percentage, which still wouldnt make it worthwhile for me anyways

                oh and for the big muscle, 2-3%
                autozone online repair manual
                http://www.autozone.com/addVehicleId...leSelected.htm

                supplement with haynes manual from pep boys (<$15). includes vital troubleshooting and maintenence schedules.

                pics of all gsr rims

                b-series dynos

                Comment


                • #9
                  I guess the basic point I was gettin at to is, where is all that air gettin sucked in from?? Short rams I can see being able to suck in lots of air, because there is quite a bit more flow through the engine bay, than down by the fender. Hmmmm, maybe I should cut some "cold air holes" in that plastic area. lol
                  - Darren
                  1990 'Whitey' RS R.I.P.
                  1991 GS SOLD

                  Gone the way of the 4x4

                  Comment


                  • #10
                    XDEep: cai is definitely worth it. they ARE better intakes, thats just fact. Especially since you can get one for a good deal under $100. Its just about the best bang for the buck mod there is.

                    integra_pilot: don't worry at all about there not being enough air. Our engines don't suck in that much. There is definitely enough air down there. and sufficient venting to allow more to enter.
                    Track Project DB2 #896
                    LeMons Project DA9
                    My OG DA9, Wrecked, Stripped, R.I.P

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                    • #11
                      Save colin sum trouble. You guys go take physics and chemistry plz.
                      "Kolin" Cancer

                      Team RR - Backup Driving Instructor

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                      • #12
                        hehe, good call kolin.

                        it really is amazing how much your knowledge of basic things can be enhanced with some simple highschool and college courses in the physical sciences.
                        Track Project DB2 #896
                        LeMons Project DA9
                        My OG DA9, Wrecked, Stripped, R.I.P

                        Comment


                        • #13
                          I cut into the plastic under the reasonator so air could flow freely into my filter. The logic of this seemed pretty straight forward to me at the time. I used a piece of flexible hose in my design, so I could convert it to a short ram if I desired. The difference between CAI and Short RAM is pretty much night and day. Cutting away your plastic doesn't hurt anything as there is really nothing to protect where the old resanator is.

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                          • #14
                            AzNKT haha. well i have to admit i happen to have a homemade CAI (strictly out of boredom), but i still defy anyone with only bolt-ons to present a noticeable difference besides noise =P
                            autozone online repair manual
                            http://www.autozone.com/addVehicleId...leSelected.htm

                            supplement with haynes manual from pep boys (<$15). includes vital troubleshooting and maintenence schedules.

                            pics of all gsr rims

                            b-series dynos

                            Comment


                            • #15
                              Water

                              Yes well cutting away the plastic is good for air flow, but i feel that a big problem with cai in 2g teg is the problew with water. You see, where the filter is is where the resonator used to be, and if you remove the plastic in the tire well, it is vulnerable to sucking up water and damaging your engine. But if you don't remove the plastic, you won't be getting any extra air to the intake. now the thing about the hot air rising is a good observation and is an advantage of having cai. But look at where the 2g teg's cai and short ram intake filters are located. if u remove the resonator, and the plastic in the wheel well cold air will flow from there and go straight to the filter w/o worrying about water.

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