ls vtec

Hey RX guys, I'm having a problem that nobody in my world can seem to answer. I've got a Power FC in my Turbo Civic Hatchback and was wondering if you guys can help me set up a simple basemap with the commander. I'm not looking for a full tune, but just something to get me to the tuner. It didn't come with a basemap on it, so I'm running the stock honda basemap. Here is what I have.

880 Precision injectors
Larger fuel rail
Walbro 225 fuel pump
LS/VTEC motor
Adjustable fuel pressure regulator
Fuel Pressure guage
T3/T4 57 trim turbo
Power FC
Commander

If theres anything else you need to know then just respond and i'll write back immediatly.

What i've been told is that I should just tune down the injector size for now. Stock injector size for a honda is 240cc, so I've been told to tune the injectors down to about 30% under the injector settings. Well i've done this and the car is running really really rich. I'm puffing a lot of black smoke and my plugs foul out almost immediatly. I don't have a wideband so I'm not sure exactly how rich I'm running but based on the smoke I can say its a lot. So if i just want to get this thing to drive, what should I set it to. The car is kind of low to the ground so I don't want to take crap off just to get it on the tow dolly to get it to the tunner.

Thanks guys in advance for any advice.

rynberg

The PFC has a base map from the factory...all you have to do is reinitialize the PFC to restore it. Why are you asking how to setup a PFC for modified Honda on an RX-7 forum?

cewrx7r1

iTrader: (2)

Some people are just on the wrong page in the book of life.

ls vtec

I'm sorry, I thought I covered that in the first sentence of my post. I'm asking you guys because you seem to use them more then us Honda guys, we primarily use Hondata, but I cannot get a tuner for that system so I went with the PFC (but the tuner can't see my car for three weeks). Besides, I figured that injectors were injectors, and fuel was fuel. If you guys don't want to help then I guess I can just go to the EVO guys, but I would rather get my info from you guys, seeming that you have more posts on the issue. What I need to know is how to roughly calibrate my PFC for the 880 injectors so it doesn't freak out and go rich as hell on me when I start it up. I'm not trying to be an ***, because I dig on the RXs, I just want some friendly tuning advice from where ever I can get it.

rynberg

The injectors need to be adjusted for both size and delay (?). Part of your problem is going to be that you are trying to use injectors that are MUCH, MUCH larger than the OEM injectors. Getting low load tuning right is going to be very difficult. What do the Hondata guys do when using such huge injectors.

There is still a lot of Honda-specific tuning info here, I'm sure, that we have no knowledge of. You could always ask the tuner how to set it to get it to him....

cewrx7r1

iTrader: (2)

The manual tells how to adjust the INJECTOR settings using the commander.
But it does not tell you that the PFC will only allow you to reduce idle fuel by so much and then it stops reducing. If the idle is still too rich no matter what you try, you have to use a smaller lag time or even go negative lag to lean out the idle.

240/880 = 27.3% not 30%. Read the manual!

Our primary injectors are 550. If we replace them with larger ones like 850, many times we have to use a lower or negative lag to lean out the idle.