h23 manifold swap on f22a6

[kc8enb07]

Mine is obd2 so it does not have the air boost thing and it does not need it.

i been having a surging like a bad iacv since i did my h23 plenum swap, i had someone tell me to adjust the air boost valve then realized i didnt have one. how did u tune yours without it?

[Jon]

If I remember correctly, the air boost valve is only open/used to allow more air to enter the intake on startup. I have mine blocked off.

[dj_ender]

If I remember correctly, the air boost valve is only open/used to allow more air to enter the intake on startup. I have mine blocked off.

Correct, it's used at start up. Mine is blocked off as well, and I cold idle at about 1300 RPMs.

[pupildel]

hey frootloops where did you get them bolt for the egr port

[deevergote]

hey frootloops where did you get them bolt for the egr port

If you want to ask a member a question about something unrelated to the thread, PLEASE send a PM. Don't dig up an old thread just to hijack it. People get banned for that sort of thing.

[pupildel]

Oh Shit My Bad I Forgot

[turbo90accord]

The only thing you really need is the idle air control valve. Everything else can be deleted.

[H.M.]

What's the purpose of deleting the FITV, for example.

Is it related to keeping the IM cool, simplicity in hooking up/troubleshooting or what?

[H.M.]

Ok, so the answer to my questions are yes, yes and yes.

The FITV is used to heat the throttle body so that cold, moist air doesn't freeze in the TB.

If you are in a mild climate the FITV can be deleted and the only performance issue may be an extra minute or two for the TB to come up to optimal operating temperature. This will give you a slight (+.000003 HP ) performance increase since the air entering the TB will be cooler and denser without the added FITV heat.

FITV can be blocked off with a plate (about $15 or make yourself from a piece of aluminum) after which the coolant hose simply skips the FITV and is routed directly from where ever the hose originated to where ever it terminated after the FITV.

That's what I learned last night before I watched reruns of 30 Rock.

[H.M.]

So I’m installing H23 plenum and throttle body on a A6. I want to delete the FITV (mainly because in about 20x readings of all the instructions for this mod I never realized that the FITV on the H23 and A6 were different and I don’t have a H23 FITV).

So here’s the plan and modification to frootloops' coolant hose map (hope that’s ok frootloops – you did a great map).

To delete the FITV on a H23.

1) Remove the FITV under the throttle body. Replace with block off plate.
2) Remove the red hose (leads from the base of throttle body, ties into the green hose).
3) Plug the connection at the base of the throttle body (formerly red hose).
4) Remove the green hose.
5) Remove the blue hose (leads from the FITV to the lower small connection at the IM, under the EGR valve).
6) Add a hose from the lower small connection at the IM (former blue hose) to the top of the thermostat (formerly green hose).

Does this look correct?

[blk93]

that is just plain badass.