f22a6/f22a4

[stevecb7]

i bought a f22a4 from one of my friends but i had the a6 in my cb7 can i use the same ecu and the same wire harness

[Tippey764]

Swap the f22a6 cam and intake manifold to the f22a4 and yes you can use the same ECU and wire harness. If you dont then you need a pt3 ecu but you can still use the same wire harness

[stevecb7]

f22a4/f22a6

thats the only things i need to swap over to the a4 for it to work right. and thanks for the help bro

[Tippey764]

Yes. Don't forget to do simple maintence like replacing the timing belt or water pump while the engine is off the car. It will save you alot of time since its off the car and easy to get to.

[stevecb7]

f22a4/f22a6

ok thanks for the tips

[crazymikey]

also swap the exhaust manifold. the a4 will be a 4 into 1, whereas the a6 is a 4-2-1, which is basically a factory header. That's part of what makes the a6 have 10 more HP over the a4 and a1.

[Extacee]

now sorry about the thread jacking here but i have a pt3 on my JDM F22A am i holding back the "power" from the PT6 will i feel the difference?

[92smokeaccord]

now sorry about the thread jacking here but i have a pt3 on my JDM F22A am i holding back the "power" from the PT6 will i feel the difference?

yes because the butterflys arnt 0pening its gasping f0r air.




0p..als0 use the 0il pickup windige trayin the 0il pan.als0 the valve springs and retainers are str0nger its n0t nessacary but might as well utalize the a6 while u g0t it.

[visualpoet]

also swap the exhaust manifold. the a4 will be a 4 into 1, whereas the a6 is a 4-2-1, which is basically a factory header. That's part of what makes the a6 have 10 more HP over the a4 and a1.

The a4 header is actually the more header like of the two, it's made from tubular steel and also a 4.2.1 design, whereas the a6 is a cast manifold.
i doubt it is much of a part of the 10 hp, that comes from the secondary IM runners and the slightly wilder camshaft in the a6

now sorry about the thread jacking here but i have a pt3 on my JDM F22A am i holding back the "power" from the PT6 will i feel the difference?

yes because the butterflys arnt 0pening its gasping f0r air.




0p..als0 use the 0il pickup windige trayin the 0il pan.als0 the valve springs and retainers are str0nger its n0t nessacary but might as well utalize the a6 while u g0t it.

Yes, but not because the butterflies are shut. They aren't. The default position for the butterflies is open. Vacuum causes them to shut at lower RPMs, and then opens them up as rpms increase and vacuum bleeds off. The pt3 doesn't have the correct fuel and timing maps to take advantage of the extra airflow and bigger cam in the JDM f22a. You'd be better off with the pt6.



Go buy a keyboard, they cost 2 bucks at a thrift store. Reading 0 instead of o is annoying as hell.

[cb7build]

so i have an a4 and am planning on doing the a6 cam swap with the a6 intake manifold as well. So as I understand it i will need the intake, cam, valve springs, pt6 ecu and said parts gaskets. anything else? (throtle body)

[Fleetw00d]

The a4 header is actually the more header like of the two, it's made from tubular steel and also a 4.2.1 design, whereas the a6 is a cast manifold. I doubt it is much of a part of the 10 hp, that comes from the secondary IM runners and the slightly wilder camshaft in the a6

The A4 exhaust manifold and flex pipe was essentially the only difference between an A1 and A4, which accounted for 5 HP more for the EX with A4.

[Tippey764]

Don't waste your time with the valve springs.

[wildBill83]

Can't he just transfer the head over and not mess with anything else other than IM and ECU?

[cb7build]

Don't waste your time with the valve springs.

F22A

This engine series was used in the Honda Accord and Honda Prelude S. Aside from differences in tuning, these engines are substantially similar.

[edit] Specifications
Bore × Stroke: 85.0 × 95.0 mm
Displacement: 2156 cc
Valve configuration: SOHC, 16 valves, non-VTEC
Compression ratio: 8.8:1
Max power: F22A1: 125 hp (93.21 4 kW) @ 5200 rpm. (Accord DX, LX). The 1992–1996 Prelude S had a F22A1 but because of a different more aggressively tuned ECU (P12), the power output was 135 hp (100 kW).
F22A3: 150 hp (110 4 kW) European domestic market engine, with more power due to less strict emission standards.
F22A4: 130 hp (96.94 kW) @ 5200 rpm. (Accord EX) The F22A4 is the same motor as the F22A1 but it has slightly more power due to a tubular designed header and slightly bigger exhaust piping.
F22A6: 140 hp (104.40 kW) @ 5600 rpm. The F22A6 is the same as the F22A1 except for a slightly more aggressive camshaft, a better flowing cast exhaust manifold, a different more aggressively tuned ECU (PT6), and a different intake manifold that utilizes IAB's and also has a bigger plenum. The F22A6 also has a windage tray in the oil pan, and stiffer valve springs to accommodate the more aggressive camshaft. In cars with an automatic transmission there is an oil cooler present on the back of the block as well.
F22A7: 150 hp (110 4 kW) European domestic market engine, with more power due to less strict emission standards. (uses PT4, obd1 ecu) .Compression ratio: 9.8:1

Max torque: F22A1: 137 lb·ft (186 N m) @ 4000 rpm
F22A4: 142 lb·ft (193 N m) @ 4000 rpm
F22A6: 142 lb·ft (193 N m) @ 4500 rpm
F22A7: 145 lb·ft (198 N m) @ 5000 rpm
^^^^^^^
Wikipedia says that the valve springs are stiffer. This would be my reason for asking about them. Is there any place to find out if this is true? If so I cant find it. Anyone know? thanks

[Jarrett]

They are stiffer. There is also a verified difference in spring height. Tippey764 is not suggesting that there is no difference. He is simply implying that it is not worth the effort required to swap the springs over. While it is easy to get the F22A6 springs off of a donor engine you need the head off of the engine in which the springs will be installed. That's a lot of work required for a gain that may be negligible. After 20 years the higher spring rates may not be what they once were. That being said, when I replaced my F22A6 with a good core a few months ago I swapped every single F22A6 part over to the new engine, including the valve springs. I had the head off, though, which made it a much easier decision.