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Old 01-04-2008, 04:47 PM   #1 (permalink)
07lbz3500dually
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best lbz cold air intake

what is the best overall cold air intake for my new lbz duramax?
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1999 6.5 diesel suburban 4x4 k&n intake 3 inch cat back exhaust antera wheels hand painted graphics, safeview camera equiptment
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Old 01-04-2008, 05:00 PM   #2 (permalink)
Unit453
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There is no "best" intake for any model year engine.

They all do the same thing. Some filter better than others and some dont. Some flow better than others and some dont. Some say the stock system flows more than enough air that the engine can effectively use and nothing out filters it. Air intakes do not give you any gain in power or performance. Most are work exactly zero h.p. above stock. Some buy them for more turbo noise. Some have reported better mileage where as others have reported worse mileage.

This topic has been beat here since the beginning of time. Take a gander at the threads within this section and also the stickys at the top of this section. You my be surprised at what you find.

I ran an AFE stage 2 on my 04 LLY and never had a problem with it. I never noticed anything different either. I run an S&B now and its a nice system but winter's not a good time to see a mileage increase. Its usually the opposite.

Here is a good thread to get you started at exactly what intakes do to our engines.

Cai
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Old 01-04-2008, 05:20 PM   #3 (permalink)
07lbz3500dually
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so what your saying is since my truck is stock with only 365hp and 650ft-lbs of torque i should run the regular intake from the factory and not buy an aftermarket?
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1999 6.5 diesel suburban 4x4 k&n intake 3 inch cat back exhaust antera wheels hand painted graphics, safeview camera equiptment
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Old 01-04-2008, 07:12 PM   #4 (permalink)
cory e 05 dmax
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i would just get a high flow air filter for your stock box. i would if i could do it again. i get a alot more turbo turbo noise with mine. spent to much money just for noise or just to put stock one back on. but it does look good under the hood also and it cleans it up under their.
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Old 01-04-2008, 07:19 PM   #5 (permalink)
TIM Z
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You can do the PPE airbox mod and have more than enough flow. I wish i would have done this and saved my self some money. But I really do like my AFE system, its got a Huge filter and before i modified the exhaust i definitley had more turbo whistle than stock. More power,? I m not sure.
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  • AFE Intake/ EGR Blocked / PPE race valve
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Old 01-04-2008, 07:37 PM   #6 (permalink)
Jason Duramax
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I've been wondering this: How can some info say there is little or no power increase with an aftermarket intake, but at the same time companies and magazine dyno results DO indicate power increases using an intake alone? For example, K&N advertises 22 instant horses with thiers on the LBZ. But no one else is boasting HP increase in thier ads, or not as loud as K&N does, WHY? Most will show filtration/flow improvements, but you would think HP numbers would catch more attention. SO HOW DO SOME CLAIM DYNO PROOF, and some say that's ALL BS. It doesn't add up, so who's wrong?
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Old 01-04-2008, 07:50 PM   #7 (permalink)
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Quote:
Originally Posted by Jason Duramax View Post
I've been wondering this: How can some info say there is little or no power increase with an aftermarket intake, but at the same time companies and magazine dyno results DO indicate power increases using an intake alone? For example, K&N advertises 22 instant horses with thiers on the LBZ. But no one else is boasting HP increase in thier ads, or not as loud as K&N does, WHY? Most will show filtration/flow improvements, but you would think HP numbers would catch more attention. SO HOW DO SOME CLAIM DYNO PROOF, and some say that's ALL BS. It doesn't add up, so who's wrong?

The other company advertise hp increases also.
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Old 01-04-2008, 07:54 PM   #8 (permalink)
Unit453
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That link above that I posted pretty much is all the experts opinions here on intake systems.

I never said to leave it stock. I ran mine stock for a while as well. The stock filters flows rather well. Take it and blow through it and put your hand on the other side of it. You guys would be surprised at just how much air makes it through. The stock donaldson is superior to flow and filtration to anything else out there.

Now, those are the facts.

My opinion is like many here and just that; an opinion. I compared my stock intake to the S&B that I'm running on the garage floor and to me, there's no question about which should flow better. The question is that does the motor actually use the additional air? Some say no, it dosent. Some say that the stock air box flows more than enough air to support upwards of 500 rear wheel h.p.

Take a look at that link. The experts have spoken.
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Old 01-04-2008, 08:00 PM   #9 (permalink)
Jason Duramax
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So how can these mfg's actaully advertise HP increases when other sources say there's no way?

I was planning on buying one, after I decided which one. But the $300+- could be used somewhere more useful, or visual on the truck if there are no real gains, ya know?
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2007 GMC 2500 Classic SLT crew, LBZ Duramax/Allison, BLACK.
-STILL bone stock, except for:
-Tri fold tonneau cover
-FISHER STAINLESS V PLOW
-FISHER PRO-TUBE BUMPER GUARD (for summer)
-Timbren load supports on the front
-Rear LED bar
-4x4 stickers, side moldings, 2500 emblems gone
-5" Magnaflow SS cat back, no tip
-PPE airbox mod
-2" front crank, 2" rear blocks
-16x8 Renegade 8's, BFG 285 AT's
-'06 tow mirrors
*Isspro boost/pyro and Diablosport Predator in possession....
-1995 Jeep Wrangler w/CJ front clip, 8.5 inch lift, 38.5's

Last edited by Jason Duramax; 01-04-2008 at 08:10 PM.
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Old 01-04-2008, 08:05 PM   #10 (permalink)
TIM Z
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well i guess its like anything else, they can show you a certain point on a dyno or manipulate the numbers to sell you anything. Its BS i agree, but thats how these aftermarket companies do it. Joe Komaromi's 650 horse Dmax runs a PPE modded stock intake ( featured in Diesel power mag.) and its good enough for him. You the consumer/modifier has to do what makes you happy. You are definitley going to get good airflow with an aftermarket kit, BUT are you really improving over stock? Its up to you!!
__________________
  • 2007 SILVERADO CC SB LT3 4x4 DURAMAX LBZ
  • EFI LIVE V2 /DSP5
  • STG III Allison By M A
  • PRECISION INDUSTRIES ML Race Converter
  • M A Pump Rub fix, SC T- Case Brace
  • Twin Lift Pumps
  • AFE Intake/ EGR Blocked / PPE race valve
  • 6'' Tuff Country " Strong Kit"/Cognito Braces
  • Thanks to ERIC @M A / Mike L. / Stroke250 for the help/advice.
2000 Z71 ECSB 6.0 LQ4- TVS 1900- 8 rib drive/comp cam/ LT headers / 4L80E/2800 vigilante / alky control meth injection , 11.6 @ 114 mph / shooting for 10s this spring !
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