ENG: H-series Plenum on F22A6 runners

[AccordSe91]

I found the problem
it was the TPS adjustement

[JDM_CB7_TX]

Can u just go and completly swap the entire h23 intake manifold and all on the f22a4?

[PR CB7]

yah wouldnt it be better as far as HP to swapp the whole thing

i mean plenum swap would be fro people that dont wanna take the whole manifold

i would say do the whole thing that way u can clean the runnerrs while ur at it

please someone tell me other wise

whis is beter h23 runner+plenum
or h23plenum+a6runners

[Losiracer2]

bump, i'm gonna have this thing installed tomorrow!

[accordaffair]

The coolant lines are the biggest pain to me. But with the f22 and h23 diagrams next to each other, its not too hard. I've done this twice now. As long as you don't have to remove the lower IM it's not such a bad job.

[UrDoneSRH]

100% h23 plenum and runner swap.

the f22 parts are smaller and shorter. if you want less power then by all means. but you will be better off doing the whole swap, plus like said before you can clean the runners and the egr really good with it off.

[sulimed]

100% h23 plenum and runner swap.

the f22 parts are smaller and shorter. if you want less power then by all means. but you will be better off doing the whole swap, plus like said before you can clean the runners and the egr really good with it off.

the f22 runners are longer...improving top end preformance. not by much thou

[Losiracer2]

i didn't really experience the "meaner" sound though, but i am going to upgrade to a larger 3" intake filter and piping pretty soon since i'd probably benefit from that w/ this swap. but torque for sure i do feel

[owequitit]

100% h23 plenum and runner swap.

the f22 parts are smaller and shorter. if you want less power then by all means. but you will be better off doing the whole swap, plus like said before you can clean the runners and the egr really good with it off.

The runners are about the same diameter. And theoretically, shorter is better for top end power, not longer.

Also, the runner lengths and sizes are so close to each other, there probably is almost no difference between the two.

So one is a feasible avenue for people who want a slightly easier route, and the other is for people who don't.

If you already have an A6, with the ease of this swap, it would probably be silly to swap the whole thing. It isn't like you are going to get 50 more HP.

[98vtec]

you should take the IAB plate out completely

[accordaffair]

Without a plate I believe it rests too low, and might give you trouble. It's better to get one of those spacers if you really want a delete.

[98vtec]

from my experience with the h22, it makes more power.

[owequitit]

from my experience with the h22, it makes more power.

At the expense of torque below 4800?

[98vtec]

my car has never had a problem with low RPM response. Having the IAB plate in without the valves just simply didnt make the power that taking out the IAB plate did.

ask Jdogg and Jeff Evans, they will agree with me as they have both dyno tested it.

You MUST retune the engine if you take them out.

[owequitit]

my car has never had a problem with low RPM response. Having the IAB plate in without the valves just simply didnt make the power that taking out the IAB plate did.

ask Jdogg and Jeff Evans, they will agree with me as they have both dyno tested it.

You MUST retune the engine if you take them out.

Do you have pics of your dyno's?