.boB

Gas engines often respond well to cold air intakes. And I see that the same set ups are pretty common on diesel, but about twice the money.

I was looking at the Cool Hose. That's the insulated blue hose that goes between the air boc and the turbo. Larger than the stock piece, smooth bends, no restrictions. Since it's insulated, it keep the air temp down.

While looking at it, I found a dyno chart (which I can't find now). According to the data, the intake temp dropped a considerable amount. What really surprised me was the lack of appreciable power gain. IIRC, it was around 2-3 hp and 3-4 ft/lbs. Both numbers were definatly less than 5. Dramatic drop in temp + dramatic rise in air flow = no power gain.

So, what am I missing? People are spending hundreds for dollars to gain 2-3 hp. IMO that's way too much money for that small gain. Does it lower exhaust temps? Increase fuel mileage? Sound cool? IDK, but I'm definatly missing something.

kantdrive55

Easiest way to explain it is to think of your engine as a big air pump. The more air we are able to feed it (cold air intake) the more air we can get out of it (larger free flowing exhaust) the better the motor will run. In all the dyno testing we have done here, we have seen gains usually in the 5-10hp range and a drop in exhaust gas temps of about 50-75F. These two upgrades typically would be what you would do first.

.boB

Cold air kit....... $250
Cool Tube......... 130
Exhaust............ 550

total................ $930

Total gain.... 10hp = $93 per hp.

That's pretty expensive power.

rip 112

I wasn't intending to get power out of intake and exhaust mods. But what I do by opening them up is allow for a better environment for mods that will give me power and pretty much help maintain egts.

You can make your own intake for less than that.
With the cooltube
You have a 4" exhaust, all you need to do is lose the cat and muffler and put a straight though muffler on. Or leave the cat. Your choice. 4" will handle 500+ hp

I'm really seeing your cost at an estimated $300 dollars, give or take. Either way thats about $600 less than you were thinking.

kantdrive55

[quote=rip 112;2532330]I wasn't intending to get power out of intake and exhaust mods. But what I do by opening them up is allow for a better environment for mods that will give me power and pretty much help maintain egts.quote]

BINGO.... we have a winner.......

.boB

That's what I was thinking - the mods themselves don't create a lot of power. But they help get the most out of other mods - like better cam, twin turbos, etc.

Gas engines are the same way. Long tube headers and dual exhaust don't make much power on stock heads.

As for the costs, I just took a quick look at your web site.

Ace

That dyno chart you are talking about is marketing hype. Do you know the conditions under which they produced those numbers or ran the tests? Your truck already has a cold air intake from the factory. It's flowing plenty of air if it's not pulling the filter minder down - there is no flow restriction. Providing a bigger/different air flow path will do nothing for the engine if it isn't already experienecing a flow restriction.

moorepower

I have an AFE and it sounds great. That and it sounds great. The problem is that it is not close to being as low of intake temps as the stock box. Mod the stock box with a 4"cold air hose in the bottom and you will better an aftermarket kit, say many. I think the blue hose is most likely a good investment, but not a big power gainer. I am going back to the modified stocker, because the aftermarket just did not help. I have also read that the modified stocker runs as cool as aftermarket. Most of these kits are of high quality and look and sound great, but just like my factory exhaust, just really don't help H.P. until you are pushing 500 H.P.

powermad

think about it like this. on a hot summer day do you want to drink your lemonade out of a tiny stir straw of a big gulp huge straw? its not going for power gains its going for efficiency. tho it will be just as cold with a little straw, your still not getting as much as you want.

moorepower

If you cut a 4" hole in the bottom with a hose to the front the filter minder quits moving. With a modded box there is no restriction issues at 400-450 h.p. Somewhere there is a thread with intake temps taken with a modded stocker compared with a "cold air" intake kit. The results are a major increase in inlet temp, reducing power under real world conditions. I bought my AFE thinking the same thing, because every gasser I have owned benefited from the "cold air" kit. My Cummins did not. Every time I read that the cold air kit dropped 150, the 4" dropped 200, the turbo dropped 150 and the smarty dropped 200, I wonder if the exhaust can freeze ice when done. And yes I have read where guys claimed all of the above on there truck, + the big intercooler helped 50.

poindexter1

here in florida i see on my edge monitor 115 to 125 digress on intake temps ,im sure it less with a the stocker with some simple mods,should have spent the $ elsewhere . didnt know dtr was right here to read o p mistakes.

Mocho

I would/will never spend $500 on a intake. Some of them are harmful to the engine because they don't filter good enough, which is a huge concern. The stock airbox is pretty good flowing. TBH I think a lot of people do a intake for the "cool factor". I can vouch and say a straight pipe did ZERO ZERO for my EGT's. Like i've said before, people believe what they want to

Might be a small advantage to a intake, but not worth the coin anyway you look at it.

KelschKid

Here's what I did. Cut a hole in the bottom of the stock air box (PSM style) and connected a piece of rain gutter pipe that is black and flexy to it with a flange-dilly that I got from Lowe's. Then I did the Airraid do-hicker that eliminates the baffle-thingy that's between the air box and the turbo. I also bought a washable drop in filter. If I remember right the whole setup only cost me about $120.00.

Drop in EGT's? perhaps a little, but at least I can say that I tried

Dodgezilla

This costs about $70 (W/ Outerwears cover) and flows better than stock. Plus it can be blown out and reused. I usually get about 40-50,000 miles out of one of these......

Totallyrad

What you guys are forgetting is that the 3rd gens come from the factory with a cold air intake but like someone said earlier, it could flow better. Adding the tube in the bottom of the stock airbox makes the stock filter the weak link.