KoSpeed header over stock?

[CB7Denmark]

Hello guys, and greetings from Denmark


I've recently bougth my first CB7 EXI with the F22A3 (I'm from Denmark;D) engine outputting 150hp, and still runs great and fast!

Anyway, the flexpipe on the stock exhaust is almost completely broken due to aging, so i was thinking of buying a Header for the beast.

I would like to state that in the future i intend on buying the Bisi Header, but as i am prioritating differently right now, i'd like to get a cheaper one for now.

I've already spend well over 2000$ on reconditioning and servicing on the car so it looks almost brand new I have maybe another 2000$ to spend, + - .

Right now, im waiting for the Skunk2 Sports suspension before installing the lowering spring on to it, i also just bought some expensive OZ Superracing rims for it and it looks so bad right now Anyways!

I was thinking of buying this header http://www.ebay.com/itm/TUBULAR-RACI...fa76a1&vxp=mtr
Its about the same price as for buying the new stock parts for repairing the broken flex piping, so i thought why not? But will i see any gains over the stock exhaust system/Header?
Later this month im gonna order the BISI Stage 2 Cam and new valve springs, and later on having the car chipped tho i might wait with the chip until i get the BISI header, but thats 1000$ dollars which i could use otherwise for the car.

What do you guys think?

Currently i only have a Cold Air Intake installed
Coming:
Header
Bisi Stage 2 Cam
Chip
Skunk2 Suspension / Lowering 55mm/F and 45mm/R
Different 2,5" exhaust system.
I have a H22A intake from a prelude VTI-S laying around, would it some how fit or is it a stupid idea?

[BackRoadCB7]

The Ebay header will suffice but you may have a problem with the flexpipe on the manifold. Some of these last and others have been known to pull apart. As for the H22 manifold it wont fit as easily without modification to the mounting holes. The H23 bolts directly to our cylinder heads. Some also prefer the f22a6 manifold with the h22/h23 upper plenum.

[CB7Denmark]

I only asked about the H22A mani, because its just lying around..

I will definitively get my hands on the H23A I.M..

Is it a direct bolt on? Or do i need to change anything along with it? Does our TB fit the H23A I.M?


A new downpipe is more expensive than the KoSpeed Header with cat delete and bolts'n'gaskets shipped to my address. So im gonna order the KoSpeed and then buy Bisi's magic once i have 1000$+ to spend.

I believe, atleast in my case, that the A6 I.M would be restrictive as i have the EUDM Engine, correct me if im wrong? The A6 I.M is not even accessable in my case in europe, again, correct me if im wrong, tho i think im gonna go with the H23A once i find one.

Thanks for the reply bro

[deevergote]

Does the F22A3 have a dual-runner intake manifold? I've never seen one in person, but making 150hp, I assume it has all of the best parts! If so, you should be able to use the upper portion of the H22A intake manifold (the plenum) on the lower portion of your F22A3 manifold.
The F22A throttle body (at least the ones in the US... yours may be different) won't fit on the H22/H23 plenum. If you have a throttle body on your H22A manifold, you can use that.

As for the header, BackRoadCB7 is correct. Those cheap "ebay" parts are pretty much all the same. Sometimes they fit well and last a long time, and other times they leak and fall apart quickly. You'll likely gain a very small amount of power over your stock manifold... but probably not much at all. Especially since you have one of the best F22A engines out there!
If you're going to go with a cheap "ebay" header, I'd just shop for the least expensive one you can find. Chances are, you'll be spending a good amount for shipping to Denmark, so there's no need to pay more than necessary. Most of those things are cheaply made Chinese junk anyway. Probably all made at the same factory!

[F20A CB7]

Buy a H23a1 header, the primary and secondary pipes are larger than a f22a..

I wonder by how much tho. Any 1 know?

[Jarrett]

Why would you say that they're different if you don't know? Most of them are sold as intended for both?

[deevergote]

I'm sure the stock H23A1 parts are not exactly easy to find in Denmark... and aftermarket cheapie stuff is usually listed as for both the F22A and H23A1, as Jarrett said. Once you go aftermarket, you're going with wider primaries.

[CB7Denmark]

Hey guys. Sorry i kept you waiting.




I did some research, and this guy "http://hondaswaps.wordpress.com/2009...f22a6-runners/" did the H22A Plenum on the F22A6 (With 140hp stock).

So i think im gonna try this, in the guide at the end, he said he noticed a noticable difference. But i also came to think, that the A6 could be restricted in the plenum size, and he actually got the engine to about 150hp ? In his case, that would be a noticable difference, but in my case it might not change anything alltho the H22A (Its from a JDM) IS 220hp which in technical matters would need much better flow, and therefor could offer more power to my engine..

Im kinda split on this one?

For this operation to happen, i would like to see gains in the area of 5 to 10 hp, otherwise the work would categorize more as a "Flow Upgrade", which could also come handy for the later work im gonna do.

The A3 Manifold, most likely has Butterfly valves. I havent seen them for myself, but not having it, would not be logical, as it allows more air at higher RPM, the last 10HP is in the high RPM range, so my qualified guess would be, Yes it does have dualrunners.

What do you think?

[deevergote]

The general assumption is that the H22 plenum on the A6 dual runners gives about 10hp. I don't know if anyone has proven it yet, since dyno time is pretty expensive. It should be a noticeable gain, though. Especially if combined with an intake, basic header, and a wider exhaust system.
Depending on what the differences are between the F22A6 and F22A3, your F22A3 might make even better use of the plenum.

I'd love to be able to compare the compression ratio and camshaft specs of the F22A3 vs the F22A6. I wonder if that's where your engine makes that extra 10hp. Perhaps it's just in the ECU tune, or in the lack of certain emissions devices (do you know if you have an EGR system, or a catalytic converter?)

[linkcb7]

I am one of the few that have had good luck with eBay headers.. some recommend using new Honda gaskets though. I happen to be using an A4 header on my A6 downpipe. The h23 plenum & TB work great and is a pretty easy mod... I also grabbed an IAB plate and gutted it out, used it as a spacer under my functioning IAB plate.

[CB7Denmark]

The general assumption is that the H22 plenum on the A6 dual runners gives about 10hp. I don't know if anyone has proven it yet, since dyno time is pretty expensive. It should be a noticeable gain, though. Especially if combined with an intake, basic header, and a wider exhaust system.
Depending on what the differences are between the F22A6 and F22A3, your F22A3 might make even better use of the plenum.

I'd love to be able to compare the compression ratio and camshaft specs of the F22A3 vs the F22A6. I wonder if that's where your engine makes that extra 10hp. Perhaps it's just in the ECU tune, or in the lack of certain emissions devices (do you know if you have an EGR system, or a catalytic converter?)

My car has a catalytic converter, my old car, A Ford Mondeo ST200 2.5V6 (Your markets Contour SVTs equivalent) which had both EGR valve and CC, so im not sure, i haven't spotted it but then again, i haven't looked for it either..

Anyways, the F22A3 has 8.8 CR and i believe its the exhaust system that makes the difference, quite possibly the Cam aswell, but im not sure tho. We got less strict emission regulations, so it could be the exhaust only. (These engines are really tuneable unlike every single other engine i've had my hands on :S) My Redline is at 6500 and cutoff is just before 7000, so the ECU is definitively altered aswell.

I got a large 3" CAI installed, so if it adds to any advantage that would be good .

I'm extremely excited about this swap, i should perhaps make a new thread. I will start the work on Saturday. Using H22A TB and H22A Plenum It tickles in my fingers to get started :P I could do a one-take video perhaps of the swap

I havent ordered the "ebay" header yet, so im still running around with a leaking flex piping. But i will get it done soon. Over the next couple of months, i should have everything i needed for the ECU tune. Bisi Stage 2, Header, H22 Plenum/TB Swap, bigger exhaust system, most likely a 2.5" with cat delete (Will this make problems as for the o2 sensor) and the have it tuned with either Chrome or HondataS200, im hoping for 165WHP, right now its has 125whp, so that is a 40 whp increase, and as soon as i have saved enough gold, ill get the Bisi head for the F series.

Any thoughts?

[linkcb7]

That sounds like a great blue print. Something that I would suggest or throw out as an idea, is using an h22 or h23 5sp transmission... I just did it to my cb7 and it probabaly made more of a difference than the h23 intake with k&n cai and A4 headercombined...
Hopefully your car is already a manual so the swap would be easier. Mine was automatic before I did the swap but it was still on the easy side. I did it all myself

[linkcb7]

A lite flywheel would also be a good idea too since you might as well go with all new clutch parts while your doing the swap. I seen a couple of people exaggerate on the clutch engagement with 8lbs flywheel and it being a pain in traffic. But I've had zero complaints with the H transmission or lite flywheel

[cp[mike]]

if you buy an ebay header, expect it to fit a little crooked, it will be hard to install because the bolts interfere with the oil pan, and the support bracket won't line up. It will probably bang into the front crossmember when you're in reverse (needing trimming), and it might start to leak after a short time (needing a better gasket).

Otherwise, they are a great deal for the price, if you need an exhaust. Just expect to do some finess to get it in there, and I wouldn't consider it a huge upgrade. Definitely a great way to update an older honda with a rusted out stock header though. I've used them on 4 of my cars (from various sellers, all as cheap as I could find), and have been very happy with the life that I got out of them.

[CB7Denmark]

Yea, i also thought of changing the tranny to a H23, along with new a clutch.
And my car is m/t. In Denmark, if you want an A/T, you need to place a special order except for BMW and Mercedes, they are mostly A/T.


Anyways, i'm expecting to have fitments issues with the 'ebay' header, most importantly is that it fits the head, everything else can be bend, cut, re-welded w/e.


Will a Header and downpipe from a "H23 ebay header" fit the CB7? They are cheaper in P&P. What would the flywheel do? I could maybe just mill a little of the original one?

Currently, the P&P price for a F22 header is twice the actual price.

400DKK for header and usually 850DKK for P&P, which is around 250$, which is also why im considering saving the money for a BISI header, unless the H23 header & downpipe can be used, it costs a fraction of the F22 ebay header.


How did your fuel economy turn out with the new tranny? It's not that im afraid of burning petrol, but i do drive 90 miles everyday to work, which is alot here in Denmark compared to our gas prices. 1 Liter 95 Octane costs 2,20$, That is almost 10$ a gallon