Okay so it seems as though the whole gotts intake mod thing is what everyone is doing these days. Supposedly its just as good as a CAI. Well it got me thinking. On the 97-03 f150s you remove the little tube that goes into the fender well to put in a bigger tube or pvc pipe right? So my question is what would be the difference between putting the whole pvc pipe thing in there as opposed to just removing that little nozzle or tube whatever its called and letting that be the end of it. No matter what size pvc pipe you use it still has to go through that 2&1/2inch hole on the filterbox so why would it matter? Is it because people dont want the air from engine compartment because if so why even make "cold air intake" to begin with? Wouldnt running it without that little tube going into the wheelwell make a difference just like putting the pvc pipe on there? Also, if you have a K&N filter what would be the difference between that and cold air intake? Its the same mass air flow sensor and same filter and it draws air from the same place. It just has me thinking.

 

you guys are awesome

 

I saw your post but I don't quite understand what you are asking. Someone will respond, just be patient. I bet TaraJerame will respond, just give it time. The time zones are different so maybe he will rspond in the morning. I wish I could be of more help.

 

You aren't getting many answers because this question has been asked numberous times already, run a search and find out. Its best to expand the fender hole to 3" for more air induction.

 

What dont you understand? Im not trying to be impatient or appear that I am, but I noticed the views are climing on this thread but no one is saying anything. Im wondering what the difference would be between just taking the tube out as opposed to putting the whole "gotts" thing in there. But you dont have a 97-03 so you probably dont know what im saying.

 

I think the answer is you would be letting hot air into the intake, which defeats the purpose of the cold air intake. When you drive, the faster you go allows mroe air to be drawn in from the fender opening. I may be misunderstanding you, but that's my guess.

 

TruckGuy24: Okay you are restating my point actually. When you put a cold air intake kit on your truck the filter is exposed to the entire engine compartment. You arent getting cold air. You are getting engine compartment air. If you arent moving, or not moving very fast that hott air builds up over the top of your engine and thats what you get from a cold air intake. If you take that tube out you have a gap in between the filter box and wheel well and the air gets sucked in through the filter box just as it would though the filter with a "cold air intake".

DarrenWS6: Maybe I should have done a search. But I dont think you really know what you are talking about. If you have a 97-03 f150 with a stock intake you know that there is this ugly little tube that runs from the filterbox to the fender well. You will also notice how small it gets which as you can assume will restrict a lot of air. Whether you put a 3inch pvc pipe on it or not you still have a 2 and a half inch hole it has to go through on the filter box. Having that extra 1/2inch does you no good at that point. If you get rid of that tube the only difference is that you would be drawing air from the engine compartment as opposed to the fender well. Cold air intake takes in air from the engine compartment so what is the difference?

 

Not all of them have open filters. Some, such as S&B are in a closed box and the tube goes to the openning in the fender.

 

Okay bluejay so some dont have open filters. Lets say we are comparing a K&N 77 series High Flow CAI to the whole gotts mod set-up. They dont have filter boxes they have heat shields,and leaving a stock air box on can be a heat shield. You havent answered anything either. Im not talking about replacing intake. This is compare and contrast between two different things. I dont understand why this is so difficult.

 

I don't understand why you are being so rude. Apparently, you don't have all the answers either or you would never have asked the question. I would suggest that you might get a little more participation if you would not hammer anyone that offers a comment or observation. Good luck.

 

Wow. Im not being rude. I guess its difficult to determine the tone some one would say something on a computer. But trust me no harm intended. I guess it could come across that way, but just to clear things up on my end im not intending it that way. Im just being inquisitive, and if anything its racking my brain trying to explain what im talking about. Im just trying to help someone that does not understand to understand so that my question can be answered.

 

Mike Troyer of Troyer Performance did a lot of research about 3 or 4 years ago and concluded that it mattered very little if the filter was open or closed. He determined that as the truck moved, the air flowed in and out of the engine compartment and that there was little difference from air brought in from the fender openning. As I recall, he also pointed out that the CAI with the nice shiney tubes tended to be a little warmer thn the plastic. From his studies, he found that the AF! was the best of those he tested. The problem with that is that they are now out of business. That is the extent of my knowledge on the subject.

 

Okay I appreciate the write up. I really do, but I dont know any other way to ask what im asking. I guess in essense im asking... Why the hell put a 3inch pvc pipe on a 2 and a half inch hole and run it to the fender well when regardless of whether or not you have a 3 inch pipe it still has to go in a 2 and half inch hole. Why not just delete anything running to the fender well? I dont mean to insult your intelligence but I feel like that is dumbing it up a bit.

 

I don't disagree with that at all. It would seem that you are limited to the smallest size of the entire system, however, is it possible that as you get closer to the throttle body that there is a stronger suction to move the same volume of air thru a smaller hole?

 

I havent really thought about that. I do know that I removed that piece going into the fenderwell and it could probably suck a basketball through there though. Its crazy how much air gets sucked through there. What you said about being limited was my main issue all along. I did not understand why you would want to make a 2and half inch hole expand to three when all the while you still have to put air through that smaller hole.