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

[b3nsonx]

excellent, i think this thread should be a sticky

[deevergote]

Then nobody would read it!



Honestly, aside from the F22A parts, there's not much science behind my claims. HondaFan81, who is VERY meticulous and accurate, has pointed that out to me. He's really busy, but I believe he'll soon be providing a bit more detail into bringing out the most performance for the least amount of money with the F22A.

Until then, I'm simply going on the stock numbers, and the differences between the engines. The extra airflow of the H plenum, as well as an improved intake and exhaust system, are very likely to produce more power. The reason why I have each modification limited to about 5hp at the crank is because I wanted to retain a fairly moderate claim. It may be more, it may be less.

Still, the principles are sound. None of the modifications I mentioned should require you to rev beyond the safe stock limits to make the most of the added power. Still, I have no concrete information. Just a reasonable understanding of how things work.

[owequitit]

LOL!

I am going to bed now, but may have time to comment some tomorrow.

I am tired, and I am not judgemental on the internet, at least not in a context beyond the internet.

[moe]

y not just use the h23 ECU and bore out the h23 IM?

[accordaffair]

Don't think the whole dohc to sohc translates well in ecu's, but I'm not educated in that field

[deevergote]

y not just use the h23 ECU and bore out the h23 IM?

Do you understand what you're suggesting?

[TheChosenOne]

This is a very, very helpful thread.

[Shadow1]

Do you understand what you're suggesting?

i dont think he does

y not just use the h23 ECU and bore out the h23 IM?

because these mods are for the f22a motor. not the h23. the intake manifold we can use comes from the h23, but its DOHC. not SOHC. if you plug an ECU from a DOHC motor to a SOHC then you may risk messing something up. the h23 may have(someone, once again, correct me if im wrong. lol) different timing and a/f ratios.

[gloryaccordy]

i dont think he does



because these mods are for the f22a motor. not the h23. the intake manifold we can use comes from the h23, but its DOHC. not SOHC. if you plug an ECU from a DOHC motor to a SOHC then you may risk messing something up. the h23 may have(someone, once again, correct me if im wrong. lol) different timing and a/f ratios.

H23 ECU would be safe if not for the need for knock sensors. Peeps use the SOHC F22A ECU on the F22B DOHC all the time.

[F20A CB7]

Whats the diff in exhuast mani between the a4 and others.

The a1 is a 4-1 design, and the a6 is 4-2-1 setup, wat about the A4, shes the same as 4-2-1?? some 1 correct me plz

[Shadow1]

H23 ECU would be safe if not for the need for knock sensors. Peeps use the SOHC F22A ECU on the F22B DOHC all the time.

this, i did not know how is it that the f22b DOHC motor can run good off of a f22a SOHC ECU?

[d112crzy]

the ecu can't tell how many cam's you're running. you can have 10 if you wanted, the ecu wouldnt know the difference.

[F20A CB7]

the f22a1 and a6 have the same headers. its the a4 that has a different set up and gives you a better gain in hp than the other 2.

The F22a6 header, EX, is not 4-1 shadow. its 4-2-1

[owequitit]

the f22a1 and a6 have the same headers. its the a4 that has a different set up and gives you a better gain in hp than the other 2.

This is a 100% false statement.

The A6 and the A4 share the same basic 4-2-1 header design, but the difference is in the way they are made. The A4's are constructed out of tubular steel, much like an aftermarket header, whereas the A6's upper half is cast. The lower half is the same on both cars.

In all honesty, I think this upgrade is worth less than 5HP, because it pretty much isn't detectable at all when driving the car. I think Honda simply switched to a cheaper construction method. I also think that part of the reason may be the fact that the 1.75" collector is probably more of a restriction on a bolt on accord than the upper half of the manifold is.

[F20A CB7]

This is a 100% false statement.

The A6 and the A4 share the same basic 4-2-1 header design, but the difference is in the way they are made. The A4's are constructed out of tubular steel, much like an aftermarket header, whereas the A6's upper half is cast. The lower half is the same on both cars.

In all honesty, I think this upgrade is worth less than 5HP, because it pretty much isn't detectable at all when driving the car. I think Honda simply switched to a cheaper construction method. I also think that part of the reason may be the fact that the 1.75" collector is probably more of a restriction on a bolt on accord than the upper half of the manifold is.

THANK YOU!