Duramax Diesels Forum Truck of the Week
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Old 09-27-2019, 12:55 AM
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Ive thought about the different intake manifolds that are out there for the duramaxs because just about anything has to be better than the stock design in a performance application, but my question is if you wanted to make an intake out of alum how thick of material would you need to hold the boost that some of these trucks make??
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Old 09-27-2019, 12:34 PM
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i would think you could make it as thin as the boost tubes? probably would want the sealing surface that bolts to the heads around 3/16. just my thoughts never built one.
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Old 09-27-2019, 12:57 PM
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If it was round I would agree. If there’s corners it’ll need to be thicker. Honestly I don’t think the intake is restrictive. Now the exhaust side needs a lot of work
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Old 09-27-2019, 01:41 PM
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If it was round I would agree. If thereís corners itíll need to be thicker. Honestly I donít think the intake is restrictive. Now the exhaust side needs a lot of work
I feel like in a full race or puling truck though there would be better options
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Old 09-27-2019, 01:55 PM
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I feel like in a full race or puling truck though there would be better options
We have better options, like the Wagler intake setup. SoCal also mills the intake clamshell area if you choose that service. The factory clamshells aren't a limitation IMO.
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Old 09-27-2019, 02:08 PM
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Quote:
Originally Posted by 02ilduramax View Post
I feel like in a full race or puling truck though there would be better options
Maybe if youíre running aftermarket heads
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Old 09-27-2019, 02:50 PM
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Why don't gas outfits settle for well-ported clam shell intakes then? Are they pushing that much more CFM through their air pumps (engines) compared to us/diesels that they reap the benefits of those intakes like the Holley EFI one for the LS engines or that rad one from NRE for their big power builds? Why don't we see more intakes for the V8 diesels that resemble those style of gasser intakes?
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Old 09-27-2019, 02:59 PM
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Originally Posted by SmokeShow View Post
Why don't gas outfits settle for well-ported clam shell intakes then? Are they pushing that much more CFM through their air pumps (engines) compared to us/diesels that they reap the benefits of those intakes like the Holley EFI one for the LS engines or that rad one from NRE for their big power builds? Why don't we see more intakes for the V8 diesels that resemble those style of gasser intakes?

kind of my thought I know in serious race engines they mess with runner length/volume/velocity
not knocking anything that is out there but thinking out loud I like to fabricate and have some background in race engines and have thought about building something for my s10 repower
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Old 09-27-2019, 03:19 PM
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Boosted application is different than naturally aspirated.
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Old 09-27-2019, 03:28 PM
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Quote:
Originally Posted by SmokeShow View Post
Why don't gas outfits settle for well-ported clam shell intakes then? Are they pushing that much more CFM through their air pumps (engines) compared to us/diesels that they reap the benefits of those intakes like the Holley EFI one for the LS engines or that rad one from NRE for their big power builds? Why don't we see more intakes for the V8 diesels that resemble those style of gasser intakes?
I donít think itís as important on a boosted application, especially those like race Diesel engines pushing over 100psi of boost. Could we benefit from a runner style but I donít think the gains are massive.
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Old 09-27-2019, 03:35 PM
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Quote:
Originally Posted by SmokeShow View Post
Why don't gas outfits settle for well-ported clam shell intakes then? Are they pushing that much more CFM through their air pumps (engines) compared to us/diesels that they reap the benefits of those intakes like the Holley EFI one for the LS engines or that rad one from NRE for their big power builds? Why don't we see more intakes for the V8 diesels that resemble those style of gasser intakes?
Because they donít fit with a turbo and cp3 in the valley. Banks has a decent option. When youíre making 1500hp I would consider changing the intake if you had the room and enjoy your 15hp gain. Mark went from stock heads to wagler heads IIRC and picked up something like 80hp at the tires. The clamshells are not a limitation unless you spend 8k on heads
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