h23 im with p12?

[JDMchristian991]

ok.so i finally got a p12,and now the next mod i want is a h23 intake manifold.now heres my question.i know for the a6 im you have to run a pt6 ecu,now for the h23 im do you have to run a certain ecu?or will i be able to keep my p12?

[JDMchristian991]

anyone?

[cvc7chris]

im sure the h23 engine/tranny USES the p12 (2nd gen prelude or w/e)

so the h23 manifold would work fine i guess? idunno though

[93accordfreak]

The main reason people need the pt6 with the F22A6 is the cam profile. If you are utilizing the A1/A4 cam, then you should theoretically see a gain with a p12, though the butterflies would only open with a vacuum hook-up instead of being ecu controlled.

The H23 uses the P14 ecu, and some have surmised the p14 may present gains to an F22a6 because they both use secondary butterflies below the plenum. There is no concrete evidence of this that I'm aware of, though.

[JDMchristian991]

The main reason people need the pt6 with the F22A6 is the cam profile. If you are utilizing the A1/A4 cam, then you should theoretically see a gain with a p12, though the butterflies would only open with a vacuum hook-up instead of being ecu controlled.

The H23 uses the P14 ecu, and some have surmised the p14 may present gains to an F22a6 because they both use secondary butterflies below the plenum. There is no concrete evidence of this that I'm aware of, though.

well i have a a4.so would i be able to keep my p12 and be fine?

[93accordfreak]

...If you are utilizing the A1/A4 cam, then you should theoretically see a gain with a p12, though the butterflies would only open with a vacuum hook-up instead of being ecu controlled...

Yeah, you should. The A6 and H23 have similar intake manifolds, so the same rules would apply to either. The main other contributing factor is the cam, but the p12 was designed to work with the A1 cam, which is the same as the A4. Therefore, you should be fine, but your H23 IM butterflies will only operate via vacuum.

[JDMchristian991]

Yeah, you should. The A6 and H23 have similar intake manifolds, so the same rules would apply to either. The main other contributing factor is the cam, but the p12 was designed to work with the A1 cam, which is the same as the A4. Therefore, you should be fine, but your H23 IM butterflies will only operate via vacuum.

lol you've lost me,vacuum? with the p12 will the butterflies still open?

[cvc7chris]

lmao vaccum like the little hoses, that like hooked up to your intake
if im not mistaken

[93accordfreak]

It is possible to run a vaccum line that will open the butterflies, rather than an electronic connection. I have an A1 manifold, so I'm not sure of the hookup, but many have done it. I'll try to search around for some information on it for you.

[AbsurdNY]

The P12 will not operate the IAB's on the intake manifold. You can hook them up to a vacuum line, or just take them out. The PT6 will operate the IAB's thru the ECU.

[AbsurdNY]

It is possible to run a vaccum line that will open the butterflies, rather than an electronic connection. I have an A1 manifold, so I'm not sure of the hookup, but many have done it. I'll try to search around for some information on it for you.

All you have to do is connect a vacuum line from the intake manifold to the vacuum canister on the IAB plate. I have a CAI on my car already so the vacuum line that used to go to that is plugged right now. When I get my H23 installed, I will just run a hose from there to the IAB plate. When the throttle is open more, the vacuum drops causing the butterflies to open. The butterflies are open when not enough vacuum is present to hold them shut. They are open when the car is not running. When you start the car and there is vacuum, they close.

[93accordfreak]

Found a pic in another thread:

^^^that?^^^

if so that's your vacuum controller for your iab's and should be connected to the back of your intake on your black box. I do not see your black box, so I do not know if you have it or if it is hidden in that picture

Run that straight to vacuum, instead of to the black box.