AFM slower than no AFM 4A-GE ?

[Ryo]

Guy's help me with this:
I have my old zenki coupe 4A-GE blue top 91kw (124hp) engine.
My friend has the same car with same engine with AFM (USA,CANADA version) and about 116hp dont know how many kw is.
His car have no that good acceleration like mine old one.
Where is the problem with the power difference that his car not feels so fast like mine old rusty hachi ?
I tested both of the cars but his is i think a lot slower from start like mine.
I dont get this at all is the problem in hp or that he has catalysator and mine was having not? And if the problems is in difference in hp whats makes this engines different to each other.

[ZaX]

Both cars are very old now and AFM's are more sensitive to go out of calibration then simpler MAP sensors.

Also EGR takes away some small amount of power. Anyhow I prefer MAP versions. Much more simple design, but difference is NOT THAT big it they are properly setup.

[dreja]

Ryo, does your friend have a usa version with afm or swiss version with afm ?
They are different. Swiss one doesn't have the catalytic converter. I have swiss one.

As far as I know the user MAX from Croatia got rid of egr system in his afm version engine.
Does someone know (MAX, ZaX, ...) how the car drives now? Has it better acceleration?

[Ryo]

He has the USA/CANADA hachi with AFM. I Say again i dont get it where is the problem because his engine has in papers too that it is only 85kw engine instead of 91kw. Also when i inspected the engine there is a lot more stuff on the engine than on my old red hachi. I dont like that at all it is more complex than no AFM version. When somethink goes wrong on that thing you have da big trouble

- What about to remove AFM and all the things and just put there MAP from another hachi will that solve the problems, what you guy's think ?

[max_ae86]

I have also AFM engine with EGR and O2 sensor, CAT has been removed. It is a Red top engine (year 87-8 taken from FWD car. I removed EGR and all vacuum lines that go with it. I’ve put a new O2 sensor, new iridium sparks and new spark plugs, set TPS correctly, put new air filter, put full synthetic oil, set 10 degrees BTDC and put new pistons rings.
Car is running great!

[Ivan141]

Ryo, you can swap all the MAP wiring and ECU over from another car and ditch the AFM.

[dreja]

On club4ag was said that doing afm/map conversion won't do miracles...

But if you already have all the stuff it is worth trying.

[PetzK]

Another difference is that the US Version has 9,4:1 compression, while the other one should have 10:1 compression.

[Ryo]

If that's the point that US version has a 9,4:1 compression instead of my version that has 10:1 is it not possible that this makes the difference in response on acceleration of the car too ? Logically with lower compression the power is lowered that's why it has maybe only 85kw instead of 91 + the other things that was mentioned.
One thing that i dont get much is why is there the O2 sensor and what is the EGR. Is somewhere some manual how to get rid of the things ? Maybe that would help the car get better .

[dreja]

Is it really true that bigport bluetop have different compression (9.4 and 10.1) regarding on the market?

I was always thinking that just the smallport 7 rib has 10:1 and all bluetops bigport 3 rib have 9.4 :1.