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Old Feb 13, 2015 | 11:46 AM
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Default stock manifolds?

So I have been reading around a bit and had a question about guys using stock manifolds for there turbo builds. I see everyone using truck manifold and just wanted to know why is there somthi g different about them or is it just because of the way the outlets face? I'm asking because I have a chance to get a set off of a g8 gt and was just wondering if the would be ok. shooting for 700 with room to grow on a 408 with an s480
Thanks for any help
Jesse
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Old Feb 13, 2015 | 12:15 PM
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Originally Posted by kill4thril
So I have been reading around a bit and had a question about guys using stock manifolds for there turbo builds. I see everyone using truck manifold and just wanted to know why is there somthi g different about them or is it just because of the way the outlets face? I'm asking because I have a chance to get a set off of a g8 gt and was just wondering if the would be ok. shooting for 700 with room to grow on a 408 with an s480
Thanks for any help
Jesse
Get whatever manifolds fit your engine compartment best. One reason you see many people using truck manifolds is because they're cheap and easy to find. If the G8 manifolds point where you want them to, use them.
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Old Feb 13, 2015 | 01:50 PM
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Cheap and everywhere.
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Old Feb 13, 2015 | 03:20 PM
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Originally Posted by kill4thril
So I have been reading around a bit and had a question about guys using stock manifolds for there turbo builds. I see everyone using truck manifold and just wanted to know why is there somthi g different about them or is it just because of the way the outlets face? I'm asking because I have a chance to get a set off of a g8 gt and was just wondering if the would be ok. shooting for 700 with room to grow on a 408 with an s480
Thanks for any help
Jesse
Simple, they're plentiful, a decent shape and cheap.

The G8 one's will work just fine too, or almost any factory manifold that physically fits your needs.
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Old Feb 13, 2015 | 05:30 PM
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Ok thank you guys just wasn't sure if the ports were bigger or anything like that.
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Old Feb 13, 2015 | 07:15 PM
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It's not so much about "flow" as getting that heat energy to the turbine. I've seen some bonkers power numbers on truck manifolds.
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Old Feb 14, 2015 | 03:47 AM
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Obviously flow matters too....but the cast manifolds really arent bad at all anyway.

AGP Turbo, Hellion etc all make kits for the Gen5 which uses the same manifolds as G8 I think, and they make great power
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Old Feb 16, 2015 | 07:13 AM
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Cast manifolds usually last a lot longer than tubular ones also. Tube manifolds have a tendency to crack from the expansion and contraction.
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my buddies car that just went 7s is on stock manifolds
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Old Feb 16, 2015 | 08:54 AM
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Originally Posted by denmah
my buddies car that just went 7s is on stock manifolds
I believe that's firmly in the aforementioned "bonkers power" category!
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Old Feb 16, 2015 | 10:25 AM
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The biggest reason people use the truck manifolds is because they fit (With moving the alternator). The second reason would be that they flow decently for most peoples power/flow rates.
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