240Z, 260Z, 280Z Performance / Technical Discussions related to performance motor enhancements, upgrades.

Boring Intake

Old 02-26-2012, 01:12 PM
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Boring Intake

From what I understand the l28 intake is very restrictive so is it possible to bore out my intake at home? If so where do I start, where the throttle body attaches, where the intake and head meet, or both? And will a ka24 throttle body fit a s30? I want a little more power and this seems like the only options on my budget which is very very small. Thank you for help in advance..
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Old 02-26-2012, 04:19 PM
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https://www.zdriver.com/forums/280zx-s130-forums-77/my-turbo-plenum-32430/

https://www.zdriver.com/forums/280zx-s130-forums-77/240sx-throttle-body-hook-up-29240/


Originally Posted by NismoPick View Post
look for an Altima KA24DE motor, or Infiniti G20 SR20DE motor. Those are 60mm as well & usually use a linkage ball. Then all you have to do is cut that spring dowel & flip the linkage ball.
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Old 02-27-2012, 02:25 PM
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Thank you for the info, I looked at the links but am still a bit confused. What is a prenum? Is there a specific line that I need to cut on? Are the runners the 6 pipes that meet the head? And should I pull an intake manifold off a junkyard z for practice? Thank you again
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Old 02-27-2012, 07:52 PM
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It's a "plenum". The plenum collects the air from the throttle body, and directs it to the intake runners / cylinder head intake ports.

Unless you are a hardcore experienced machinist / TIG welder (doesn't sound like it from the question), I suggest leaving the plenum and intake runners alone, and just bore the intake neck for the 60mm throttle body.
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Old 02-29-2012, 01:52 PM
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Hit the nail on the head i am inexpirienced haha and thank you for your help, also n42 intake good?
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Old 02-29-2012, 04:03 PM
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"Good" in what way? There's no real advantage other than no webbing.
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Old 03-04-2012, 12:38 PM
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Ok cool so nothing extra special about it other than lack of webbing? And no webbing means less restriction? Thank you again
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Old 03-04-2012, 01:06 PM
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The webbing is on the outside, between the runners.
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Old 03-04-2012, 08:39 PM
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Oh thank you im not exactly the sharpest tool in the shed
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Old 03-04-2012, 09:19 PM
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You're ok, just start using the search more.
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Old 03-05-2012, 02:09 PM
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I feel even duller neglecting the search feature haha thank you a lot
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