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Differences in Intakes...

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Old Apr 22, 2008 | 12:11 PM
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Default Differences in Intakes...
What are the differences between the LS1, LS2, LS6, and LS7 intake manifolds? Are they all interchangeable with one another? And which one will make the most power...? Thanks for the help, just tryin to learn a few things..
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Old Apr 22, 2008 | 12:26 PM
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The LS1 and LS6 can interchange with very minor changes (coolant lines and egr). I believe there are issues with the throttle cables when you put an ls2 intake on an ls1 motor, and I'm not sure about the LS7. I know as far as flow is concerned it's: ls1 < ls2 < ls6
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Old Apr 22, 2008 | 05:55 PM
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I thought the LS2 Manifold flowed better than the LS6...
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Old Apr 22, 2008 | 06:30 PM
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I haven't been here long but I've gathered that properly ported ls2>ls6 but stock ls6>ls2.
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Old Apr 22, 2008 | 06:37 PM
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In that case get a ported LS6 manifold or go with the new F.A.S.T LSX Manifold 92MM
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Old Apr 22, 2008 | 07:59 PM
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Originally Posted by BloWNMind
properly ported ls2>ls6 but stock ls6>ls2.
Thats what I thought it was. I'll check back on that though to make sure.
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Old Apr 22, 2008 | 08:54 PM
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LS1 intakes suck. LS6 intakes are ok. BBK intakes are ok. Fast 78MM intakes are good but the price is hard to justify. Fast 90/fast 92 intakes rock but require a bigger throttlebody and are expensive.

LS7 intakes rule but are NOT usable on the stock cubed LS1. In order to use a LS7 intake you need a 4XX shortblock and some LS7 heads.

For a stock internal LS1 the best intake IMO is a ported LS6. For big cams or heads/cam cars a ported fast 92 with a matching ported TB is definately the way to go.
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Old Apr 23, 2008 | 04:57 PM
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I know the LS1 and LS6 intakes can be swapped... Can the LS7 and LS2 intakes be swapped also??
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Old Apr 23, 2008 | 05:21 PM
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No LS7 intakes are specific to ls7 type heads.
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Old Apr 23, 2008 | 05:44 PM
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Originally Posted by GinoLS1
I thought the LS2 Manifold flowed better than the LS6...
Once the ls2 is ported is when it starts showing good numbers however it's not much better than the ls6. The ls6 outflows ls1 and ls2.
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Old Apr 24, 2008 | 01:46 PM
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can the LS6 be bolted up to the LS2??
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Old Apr 24, 2008 | 03:39 PM
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You mean bolted up to an LS2 block/heads?
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Old Apr 24, 2008 | 04:16 PM
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Originally Posted by tylerdj
You mean bolted up to an LS2 block/heads?
Yes, that is what I meant...
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Old Apr 24, 2008 | 07:22 PM
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yes, people have switched out the LS2 for the LS6, i have a book showing a dyno comparison on an LS2 motor, and the LS6 beat the LS2
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Old Apr 25, 2008 | 07:32 PM
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Now that we got that, what are the differences in sizes for the throttle bodies for each intake??
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Old Apr 25, 2008 | 08:01 PM
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Don't forget the Victor Jr...
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Old Apr 25, 2008 | 08:42 PM
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Originally Posted by 71-Camaro-98
Now that we got that, what are the differences in sizes for the throttle bodies for each intake??
LS1 & LS6 = 75mm
LS2 = 90mm
LS7 = i dont know for sure so i dont want to look like an idiot
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Old Apr 25, 2008 | 10:43 PM
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Originally Posted by 02silvaZ
LS1 & LS6 = 75mm
LS2 = 90mm
LS7 = i dont know for sure so i dont want to look like an idiot
LS7= 90mm also
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Old Apr 25, 2008 | 11:33 PM
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So if the LS2 is a 90mm and the LS6 is a 75mm, then why does the LS6 manifold put out more power than the LS2??
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Old Apr 26, 2008 | 06:24 AM
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Originally Posted by 71-Camaro-98
So if the LS2 is a 90mm and the LS6 is a 75mm, then why does the LS6 manifold put out more power than the LS2??
it is not always about size, the LS6 has a much better design, runners, etc., the LS6 is a flowing machine, one of the best factory intakes ever made
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