How to make 30+hp for $500 or less... (DX/LX F22A1 only)

[deevergote]

That's cool to know.

[foamypirate]

I never measured exactly, but it is definitely noticeable.

I would say about the same as a SS DC header, and more than a ceramic one.

I have a theory about aftermarket headers leading to early igniter failure due to higher underhood temps. I know for a fact that my distributor was MUCH hotter with the aftermarket header (verified by infrared thermometer).

[PR CB7]

A6 does have different intake and exhaust valve springs than the A1/A4 motor. Interesting how the more we dig into these differences, the more we find.

Here are some color designations to tell the differences between springs physically:

A6

INT - blue
EXH - green


A1/A4

INT - yellow
EXH - orange

u beat me to it
called honda and they'd verified for me

[owequitit]

I have a theory about aftermarket headers leading to early igniter failure due to higher underhood temps. I know for a fact that my distributor was MUCH hotter with the aftermarket header (verified by infrared thermometer).

I have never had any issues. From a operational standpoint on my end, the temps were similar, especially while idling in the summer. Temps went and stayed well above 200*.

[Gotz Cb7]

Alright. I just recently got an A6 pulled from my car, cause the head gasket blew, and we think the head was already shaved once. So, new engine. New engine's an A1. The mechanics swapped my intake manifold and throttle body from the A6 already. So, I'm already 3 ahead. Intake manifold, throttle body, and A6 ecu that's already in the car. I also have a dc-sport header. Would I still be better of gettin' the A4 header? Right now, I'm workin' on gettin' the camshaft. I see in the list, that the intake manifold and throttle body is recommended from the h23. Would the h23's make any difference from the A6's? And what's the IAB. I'ma talk to the mechanic, and hunt down my engine from wherever he sent it. Just not sure what the IAB is. Annnd, I read up about gettin' a p12, and gettin' a little extra from it. Since I'm throwin' A6 parts on the car, is that ecu still recommended. Greatly appreciated.

[deevergote]

The P12 doesn't control the IAB system, which is the secondary runner setup in the intake manifold. You can set that up to open via vacuum, but it's not quite as good that way. There has been no hard evidence that a P12 will be better on an A6 than the P06. Both the H23 and A6 have IABs. The F22A1, Accord or Prelude, does not.

I'm still trying to figure out if the F22A7 has IABs... that would be interesting, and a very desirable ECU for a mild stock setup.

The H23 intake manifold and throttle body, at least the plenum (the upper part) and throttle body, are an upgrade over the A6.


The DC header is better than the A4 piece. Not significantly, but still better. It's not really worth the price if you're trying to decide on an upgrade from the A1 manifold, but if you already have it, it's a good thing to use.

[Gotz Cb7]

So, this runner setup. I'ma take a guess, but does that have to do with the 4 ports in the a1 and a4, and the 8 ports in the a6's? Like, 4 ports run, and then at 4k rpms in the a6, the other 4 open to make 8?

[deevergote]

Yes. Take it apart and you'll see.

[Gotz Cb7]

So right now, when I start up the car tomorrow, with the a6 intake manifold, dc-sport header, and the a6 ecu already in the car (besides intake and exhaust), the car would....or would not drive the same as it did with the actual a6 in it?

[Gotz Cb7]

And if the runner setup is inside the intake manifold already, and I already have the a6 ecu...wouldn't the runners work? Or would I need the black box thing? (if it's not already on the manifold)

[deevergote]

You need the black box for the IABs to work, and it has to be wired to the ECU.

[Gotz Cb7]

Where's this black box located? Is it on the actual intake manifold? And it should be a plug-in, correct? (to the ecu), so basically.....it's just dangling right now.

[owequitit]

So right now, when I start up the car tomorrow, with the a6 intake manifold, dc-sport header, and the a6 ecu already in the car (besides intake and exhaust), the car would....or would not drive the same as it did with the actual a6 in it?

It will not run as good without the A6 cam. The cam is a VERY large part of the upgrade.

[Nas92]

hey quick ? will it work for a automatic and with these parts do i have to worry bout any smog issues if so let me know thanks i wanna do this as soon as possible.

[foamypirate]

It will not run as good without the A6 cam. The cam is a VERY large part of the upgrade.

Mines runs very well and gets great gas mileage without the A6 cam, using a PT6. I actually got about 40.85mpg on one leg of my trip to texas.