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Ls2 and Ls3 intake manifold on an Ls1?

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Old Jan 22, 2011 | 02:55 PM
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Default Ls2 and Ls3 intake manifold on an Ls1?
Hey guys, quick question. Will an Ls2 intake manifold or Ls3 intake manifold fit on an Ls1 with no issues?
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Old Jan 22, 2011 | 03:12 PM
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Ls2 yes ls3 no..
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Old Jan 22, 2011 | 03:58 PM
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How would a rectangle port intake (LS3) fit cathedral port heads?

Like lemons said... LS2 yes, LS3 no. You would need rectangle port heads for the ls3 intake to work.
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Old Jan 22, 2011 | 04:15 PM
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does the ls2 intake have a lot of advantage over the ls1? or shoul i just wait till i find an ls6
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Old Jan 22, 2011 | 04:21 PM
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The ls2 is better... Just wait for an ls6. You can buy them all day for 300$ and it will take you a long way. Port your tb at the same time.. will be a nice 10+rwhp gain with better throttle response.
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Old Jan 22, 2011 | 05:13 PM
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yeah ive been trying to find an ls6 to pick up locally around my area(nw suburbs of chicago) and yeah i already took out the tb to port! haha

does anyone know any good write ups for that i found one on here i thought but cant find it again?
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Old Jan 22, 2011 | 06:23 PM
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https://ls1tech.com/forums/3916326-post22.html

https://ls1tech.com/forums/generatio...w-port-tb.html

Search.
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Old Jan 22, 2011 | 06:37 PM
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thanks!
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Old Jan 22, 2011 | 07:00 PM
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Make sure you don't take away too much material around the blade... It will cause your car to idle high and bad = new TB.
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Old Jan 26, 2011 | 08:18 AM
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How does the Ls2 work if the Ls3 does not? I was looking into them and they also have rectangle ports so whats the difference?
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Old Jan 26, 2011 | 09:28 AM
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No LS2 intakes are cathdral port only. LS3 is rectangle port. I agree,find a LS6 intake P&P your throttle body and be done with it.
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Old Jan 26, 2011 | 12:46 PM
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Yeah ls6 is the best one to go with,p&p your tb is really easy did mine with a few different grits of sand paper and a dremel,also do the throttle stop while your at it so the blade will open more
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