B18c6 Itbs How to
If you search for threads about DIY ITBs, you will find the information you need. (DIY = Do It Yourself) Here are a few threads to get you started:
https://honda-tech.com/forums/all-motor-naturally-aspirated-44/yup-another-diy-homemade-itb-post-2343683/
https://honda-tech.com/forums/all-motor-naturally-aspirated-44/diy-itbs-manifold-connection-questions-2527301/
https://honda-tech.com/forums/all-motor-naturally-aspirated-44/diy-gsxr-itbs-ls-vtec-pics-1800390/
https://honda-tech.com/forums/all-motor-naturally-aspirated-44/diy-gsrx-750-1000-homemade-itbs-849943/
Best of luck with your project.
https://honda-tech.com/forums/all-motor-naturally-aspirated-44/yup-another-diy-homemade-itb-post-2343683/
https://honda-tech.com/forums/all-motor-naturally-aspirated-44/diy-itbs-manifold-connection-questions-2527301/
https://honda-tech.com/forums/all-motor-naturally-aspirated-44/diy-gsxr-itbs-ls-vtec-pics-1800390/
https://honda-tech.com/forums/all-motor-naturally-aspirated-44/diy-gsrx-750-1000-homemade-itbs-849943/
Best of luck with your project.
You can not use the stock ECU. The threads have some information on what you need to do. Neptune or Hondata will work to tune it. You should also use a vacuum manifold (if you have not installed one already) so that the MAP sensor can get a useful reading.
Best of luck with your project.
Best of luck with your project.
If you search for threads about DIY ITBs, you will find the information you need. (DIY = Do It Yourself) Here are a few threads to get you started:
https://honda-tech.com/forums/showthread.php?t=2343683
https://honda-tech.com/forums/showthread.php?t=2527301
https://honda-tech.com/forums/showthread.php?t=1800390
https://honda-tech.com/forums/showthread.php?t=849943
Best of luck with your project.
https://honda-tech.com/forums/showthread.php?t=2343683
https://honda-tech.com/forums/showthread.php?t=2527301
https://honda-tech.com/forums/showthread.php?t=1800390
https://honda-tech.com/forums/showthread.php?t=849943
Best of luck with your project.
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On a stock motor, the MAP sensor reads the intake manifold pressure in the plenum. With ITBs, if you connect the MAP sensor to just one of the runners, it will fluctuate too much and not give you an accurate reading. So, most people connect all four runners to a sealed chamber of some sort to help stabilize the vacuum reading. You can see a picture of a billet one here:

Notice that a vacuum line runs from each runner to the small silver manifold and the MAP sensor is mounted there. You can mount it where ever it is convenient.
Sometimes you also need a larger vacuum accumulator with a check valve to help your brake booster.
The photo is borrowed from a post by 92TypeR in this thread - https://honda-tech.com/forums/all-motor-naturally-aspirated-44/installing-twm-itbs-weekend-few-questions-1930532/

Notice that a vacuum line runs from each runner to the small silver manifold and the MAP sensor is mounted there. You can mount it where ever it is convenient.
Sometimes you also need a larger vacuum accumulator with a check valve to help your brake booster.
The photo is borrowed from a post by 92TypeR in this thread - https://honda-tech.com/forums/all-motor-naturally-aspirated-44/installing-twm-itbs-weekend-few-questions-1930532/
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