buying an Intercooler

[PSI2HI]

All in all do you thinks any of these factors are really going to matter for what this particular person is going to use them for? For say in a 1/4 mile pass your only going to generate so much heat and its not really going to dissipate or cool down when your 100% throttle the whole time. So for say aluminum cools faster but there is no point @ which there isn't constant heat applied to it. I could see there being a bigger difference for say a road race car where your not constantly @ 100% throttle. IMO honest opinion i dont see there being much of a diff between alum/SS for this particular application for the everyday user. On a racecar where you're looking for every last possible ounce then yeah maybe.

[Shane@DBPerformance]

Yea, it is a moot point anyways. Kinda like removing the coolant lines from your TB because you think it's going to make the air cooler.

[Raptor]

That is true however if the conditions that caused it to get hot still exist, the alluminum is going to transfer that heat into the intake charge as opposed the the SS which does not exchange heat in the same fasion. If you are talking about running at the track, between rounds, there is adequate time to cool SS piping and the likelyhood of it heatsoaking is less. It takes longer to heat soak the pipe and even after it is hot, it still will not transfer that heat into the intake charge more than alluminum otherwise intercooler cores and radiators would be made from SS. Alluminum is much less expensive to manufacture which is why larger companies like APC and Injen make intakes from alluminum, they take manufacturing costs into consideration considering volume of parts and marketing to the masses. That and polishing SS is more expensive and you don't have the options to anodize in lots of pretty colors that the majority of our markets seem to like over performance even. Buschur's intake pipe is SS as well for the same reason's I mention, not for ease of manufacture, rather because it is better. As far as intake manifolds being made from SS, they can be, and it would be effective but the fabrication required to make a decent manifold that didn't look like ass would be cost prohibutive to too many customers and beyond the capabilities of most shops. In either material, I would want the intake insulated from the head to stop heat transfer to keep it from maintaining a higher temperature. I have actually considered making my intake out of SS because I don't have to worry about the cost of manufacture and trying to make the price attractive enough to sell to the public.

[Raptor]

Also, just like weight reduction, if the goal is to dominate, effects are cumulative. Not for the daily driver, but thats not who we market to anyway. If anyone was confused on this, we push to work more specifically on race type apps that care about getting every ounce as opposed to DD's. Keeping the entire intake charge system as dense and cool as possible should be the goal of any racer as well as (at least for drag racing) taking weight reduction into all areas to keep overall effect as much as possible. Depends on the goals, if average is okay, don't push for more and deal with the people that do take everything into consideration, they will be the tail lights you see ;)

[PSI2HI]

Buy nitrous, it's COLD!!

[Raptor]

I do like that idea!

[Goat Blower]

If you're really worried about heatsoak on a pipe in which pressurized air runs through at Mach something, cover your piping with a heat reflective wrap. I don't think aluminum or SS makes one bit of difference on our cars.

I'll trade my SS pipes for matching aluminum pipes if someone's got them. But not some hokey Dejon crap.

[JET]

I am in total agreement with Mike on this subject. I am going to be making 2 SS intake manifolds very soon, the flanges are being made right now.

One thing I haven't seen as much on this subject is insualted IC pipes. I could see this helping a lot, but noone ever does it. Probably just because it looks kind of ghetto, but it definately would help.

[1ViciousGSX]

I can see both sides, and they both make good points.

Lord knows I can think about stuff, "over think" about stuff and go totally extreme at times. Poor ecoli has probably popped a few headache remedies since I started talking to him about turbos (sorry about that ecoli ;) ). I think there are many factors leading to the correct answers for this.

Several things come to mind, first would be what is the purpose of the part in question?

Intercoolers are designed to maximize the air-to-air or air-to-water transfer of heat by ways of increased contact with the metal by way of turbulence which is purposely caused by internal design of the cores . I think it would be very important to take every bit of opportunity to help with that effect.

Intercooler piping is a means to move the air from one place to another. I'm sure that there is some effect from the different metals used, but in our applications, would we really see a difference? The air flow is so fast that there really is not much time/contact with the intercooler pipes to really make a difference. I would like to see somebody do a controlled test inviroment (Raptor?) to really find out. Most intercooler routing is really short. To see if there is a difference you would have tap and read temps at each end of each pipe under boosting conditions to find out. I would think the biggest benefit would come from just insulating the pipes with a reflective temp wrap.

As Raptor said, if the added weight kills the benefit from the increased efficiency, what's the point?

[Raptor]

I am waiting now on a digital manometer so I can do in car on road testing of pressure drop, I could probably setup a twin IAT setup that is similar in design to check out the temp differences as well in real world situations.

The one thing about this that you have to always go back to is just the laws of thermodynamics, it is proven beyond question that aluminum is a better thermal conductor and SS is a better thermal insulator, the IC needs to be a conductor to transfer heat in either air to air or air to liquid configs, the piping is a conduit for moving the air and should be an insulator so it isn't effected by external thermal impact and if it is, a metal with better insulating properties will transfer less of that heat into the internally moving air regardless of the temperature of the pipe's material. If it effects the air moving through it to a noticable degree is the question I think is most relevant. I will find out so there is no longer a need for wonder. For now I am still going to lean toward the side of logic and thermal dynamics and believe that it is worth taking the extra steps for the best possible scenario.