rpm and load axis is clear. But what is the increasing third dimension for ?

 

It is a fuel map right? The third axis is a fuel delivery parameter such as injector PWM width.

Regards,
BigMoose


[Modified by BigMoose, 12:21 PM 6/20/2002]

 

Thanks Moose,

another question... where (and what) exactly should I corrct if I have knock warning between 4500 and 6000 rpm ??

 

My guess is ignition timing, if you aren't lean and are already running a high octain fuel.

 

Two dominant vectors (or factors) that influence the tendancy for knock are fuel-air ratio and ignition timing advance. If you are lean in that RPM band, one would add a couple of percent additional fuel. If fueling is OK, pull a couple of degrees of timing advance (i.e. retard the timing a couple of degrees.)

Keep iterating the loop till you get it right. But not enough times to blow the motor. If its way off, its safer to overcompensate, then sneak up on the incipient knock point, then back off a degree or two. That way you only expose the engine to one "knock session" if you need to take out a bunch.

The Honda guys here will probably know exactly how much you should remove. I'm a Detroit Iron kinda guy, so I won't speculate on how much you need to dither the maps.

Regards,
BigMoose

 

majik: your problem with the PFC is you dont have direct control over
fuel values. All you can control is map voltage correction which i dont think
will give you the range of adjustment you want/need.

 

Which is why I sold mine...I now have a Hondata, but your situation is a little bit different as you don't have a local Hondata dealer...

 

Different ?

Damn....I have NOONE around who knows how to handle a PFC, noone around for the AEM, no Hondata delaer, noone who knows how to tune a b18, noone who has ever heard the name of JUN, just a few people know what an Integra is !!

Can you imagine ? It`s true !

All I got is you guys and this board..

 

Moose,

this is my first big question. Generally, I know this stuff, but there is one thing confusing me:
If I switch to the Injection Map (Fuel correction map) I have a horizontally axis for rpm in 500 steps. So I can find the knocking rpm-band easily so far.
But vertically I have an axis of "15 pressure blocks". So I have 15 possibilities to raise the value at, let`s say 5500rpm on this axis...
This vertical dimension (pressure blocks) keeps me confused... at what block should I raise the value ? And why there ?

 

EDIT - Please read the edit at the bottom first

Now you've got me curious...the PowerFC has a 20X20 map...rpm is left to right starting at 500rpm-->10,000rpm and pressure is top to bottom starting at 0.1-->2.0 kg/cm2, you should only be using the 1-10 of the pressure and 1-18/19 for the rpm. Full throttle runs should be at pressure 10 straight across the rpm band...example:
When you floor it at 1000rpm to 3000rpm the map goes to 2H(orizontal), 10V(erticle) and then 3H, 10V-->4H, 10V-->5H, 10V-->6H, 10V...this is exactly the same as how the timing map works.

To fix your knocking problem go to 6H, 10V and add in fuel on each cell going left to right until you reach 12H, 10V...if that doesn't work remove one degree of timing in each of those cells.

I certainly hope that this helps, and if you have anymore questions please feel free to ask.

Austin

[EDIT]Before you start fooling around with everything I would go into the PIMvolt screen for the Inj and at 2.0V bump fuel up ~2%(102%) and at 2.5V bump fuel up ~2%(102%)[/EDIT]


[Modified by Austin, 3:41 PM 6/20/2002]

 

Only problem is, if the fuel maps that came programmed in the FC are too far off
there may not be anything he can do.

 

That`s exactly what I needed....t h a n k s a lot..

Pressure axis is fed by slamming the throttle...and the 1-10vertical is deciding for me.

I have my knock warning in 4th and 5th speed when I almost floor the gas at 3500rpm... revs climb and I see the knock at 4800... 5200...5500...5800...

I did not notice knock at low pressure..

Anyway.. What you told me was the missing link for me. Thanks again.

I am a kind of pioneer in Germany.. The first one who tries to build a japanese/american b18c- n/a ITR on his own...




[Modified by Maijk ITR1858, 11:52 PM 6/20/2002]

 

You may be right..... My FC arrived with the B16 code...

 

Ack...there's your problem. You're going to to using the PIMvolt screen a little bit then just to get you in the neighborhood, use both voltage and RPM...and go find a dyno with a wideband, you should be able to fix your full throttle problems fairly quickly once you know how rich/lean you are running.
Austin

 

I told my dealer, one the FC was delivered... He did nothing.
But now, that there are major problems I`ll try to deal with him...

Should I swap to AEM-ECU ?

 

Sorry,
what do you mean by that (remember... english is my 2nd language) )

Btw, I noticed you`re Hytech powered.. You know John Grudynski ?