Ok, so as the weather has so dramatically changed in my area in the past few weeks, I've noticed a huge increase in the performance and responsiveness of my car. I'm well aware that cooler air will do that... Anyway, here is what I'm getting to: I did the GAB mod just under a year ago and I LOVE the sound difference it makes. From what I have felt in performance difference, it is better than stock feel in the cool/cold and worse than stock feel when it's warm... has anyone else noticed this? If this is in fact the case, I suspect it would be due to the fact that when the weather is cool, the GAB mod allows for more cool air (which is plentiful everywhere in the winter) to flow to the engine, and when the weather is hot, the engine compartment is blistering and the GAB mod make the engine suck in even hotter air than just the stock intake would.... anyone agree/disagree? What are your experiences with cold weather gain/hot weather loss of power with the GAB mod done?

 

despite the weather, any performace gains are minimal.

 

well obviously... it's the GAB, not a turbo... that wasn't my question.

 

GAB decreases power in hot weather cuz it's sucking hot underhood air.

Same with my JWT popcharger...massive lag in 90*F.

 

I run a short ram intake and would agree that the cooler temps. do give a better performance than the hot and humid weather of the summer, so yes with the recent return of the cooler weather hear in Southern Ontario performance is improved.

 

Or any other intake for that matter.

 

without a doubt heat kills any type of intake, when its getting fed 30 degree air in the winter it perks rite up

 

This.

Your question is irrelevant because chances are there isn't much gain/loss to begin with. Even on cars with full exhaust mods, the highest HP/torque increase seen on a dyno was 9 whp and i believe 12 wtq. Pretty sure this was Nmexmax that tested the gains from the GAB, and his car was heavily modified (most mods will enhance each other when used in conjuction, particularly intake/exhaust).

Long story short, these aren't changes you'll really feel. Temperature will have even less of an effect than that.

Not to mention, the GAB is a warm-air intake mod. The weather outside doesn't really matter. Take your car for a ride in the winter and then pop your hood. How cold does it feel under there? The mod will always be drawing warm air from under the hood except when the air under the hood is cool/cold (i.e. when you first start the car). However, at that point, it's foolish to push the car to the point the simple mod will make any difference at all until the car is at operating temp.


So in conclusion, I would actually think that as the air outside gets cooler, the GAB mod will actually make the car feel less powerful. Think about it, your pulling in hot air from the engine bay mixing with the cool/cold air drawn in from the snorkel in the front. You're actually warming the air up by having the GAB on at that point.

I run the GAB in the summer and remove it for the winter. This has nothing to do with temperature, I just happen to live in CT where it snows in the winter and they lay sand all over the road that gets kicked up everywhere, and the less air I have going into my filter, the less sand I get dirtying it up.



CLIFFNOTES (for Bigleman types):

Bottom Line: GAB is a mod good for the sound it makes. That's what I use it for. The HP gains, while probably there, are negligable regardless of temp.

 

-Yeah, could be... I keep the GAB for the sound too... isn't it great??

 

Actually the outside air temp has a lot to do with engine performance. it will depend on the type of intake used: GAB, WAI, CAI.. ect...

"Temperature affects fuel injection because colder air is denser than hotter air, colder air inhibits vaporization, and colder air affects combustion temperatures. Engine management systems normally have sensors to read the temeprature of inlet air and adjust the pulse width injection to compensate. Engines will make noticeably more power on a cold day because the cold, dense air increases engine volumetric effiency, filling the cylinders with more molecules of air." How to tune and modify EMS systems. There is more inculded in the link below.


http://books.google.com/books?id=ze_...age&q=&f=false

 

That isn't what he's saying. He's saying that underhood temperatures are pretty consistent, except in extreme situations, since the motor regulates itself to be within a specific temperature range. If you're sucking in air from right next to the engine block, it's going to be mainly determined by the temperature of the motor, not the outside temperature. Obviously, with a CAI, that scenario changes.

 

i agree thats why i stated depending on what your using.. cai, wai, gab. But temps will be down in the engine compartment in the winter any way you look at it (depending on the vehicle and ducting). hotter outside air will just aid in keeping UH temps constant or growing as the rad spins the hot outside air in along with all the venting areas. im not saying winter will chill the engine to subzero temps but will def aid in cooling it significantly as the rad spins the cooler air and all the vents draw the cooler air in. I do agree power output will then be addressed by any mods, if any done to the engine. One with just a Gab might feel "slight" power gains... while a cai, headers, exhaust and such will notice a much higher gain in performance with cooler ambient temperatures.

 

If you drilled a series of 1" holes in your filter box, that's where all your air is coming from. The front snorkel becomes useless.

Never understood why people with a short-ram intake leave that hunk of plastic in their bay.

 

The huge hunk of platic houses the IAT sensor thing. What are you supposed to do with that sensor if you install an intake?

 

zip tie it somewheres mine is zip tied to the battery strap

 

On the 5.5, the IAT is part of the MAF.

But if it weren't, I like BigPopa's zip tie approach. Less is more.

 

Same here with the GAB, really can tell a difference if I sit at a light for 30-60 seconds when it is 90-105 degrees. Once you get moving and the stagnant hot air clears out, then my car runs normal again. Once the sun goes down, it doesn't seem to be much of a problem.

From a roll there doesn't seem to be a problem on hot days, just when the car sits and heat soaks at a light.

 

this

 

Best intake = FAI (forced air intake)

 

Air intakes are overrated. I have two 50 gal tanks of oxygen that feed my engine.

 

berk/frankencar hybrid >>> all other intakes

 

I put a thermometer in my intake, and found similar results. It was a hot day - probably 85 degrees. When the car was moving, I was recording temperatures in the 90-95 degree range. However, at a stop, it would rise to 120-125 degrees. Once you're moving at a decent speed, there's enough airflow (especially if the radiator fans are on) that there isn't a huge difference in air temperature.

 

my intake manifold spacers keep the air cooler

 

I notice that with my GAB, the air coming in hovers around 5-7 degrees warmer than the air outside when moving at higher speeds. When sitting at a standstill(traffic, etc) the intake air always hovers above 100 degrees no matter what temperature it is outside(with the engine heated up to normal operating temp). I haven't noticed a huge amount of loss in acceleration during the summer, but there still was a little bit of it, but that was there before I even did the GAB. The coolest the air going into my intake was, that I was able to notice, was 80 degrees(at freeway speed).

 

Huge increase?

Massive lag?

WTF are you talking about its a crappy couple of holes drilled in your air box. This gives you probably NO GAIN what so ever. you are way over analizing your car. its a mental feel of "huge increase" I say you guys are crazy. you did the GAB to make is sound cooler......thats it.

 

HAHAHAHA

 

Love my spacers.