got a powerfc ..
i also got an aftermarket flywheel ..
havent got around to installing the flywheel yet ..

my question is .. should i just wait until i get the flywheel installed before i install the pfc?

 

In my opinion, that freakin Power FC is the best upgrade I have done to my car. Its ability to monitor just about everything is awesome. I love mine. And remember it isnt hard to install, so if you dont like it, just uninstall it.

Drew

 

The flywheel is not going to make a difference on your A/F ratio, so install the PFC whenever you like.

 

alright sounds good .. thought it would have something to do with the "idle learn process"

 

idle learn process???

 

The flywheel shouldnt have any effect on the PFC learning. After spending the cash i would go ahead put it in. If its brand new you can check on this link to see what map your PFC came pre-programmed with.

http://opus.bloomcounty.org/~patrick/pfc

 

It won't have to relearn the idle, but he may have to adjust the settings on the PFC having to do with what rpm the injectors kick back on during off-throttle. With a lightweight flywheel, the revs drop faster and can catch the PFC out if the settings aren't right.

ALL PFCs for the last 2-3 years have shipped with the "Base Mod" map.

Go ahead and install the PFC. At worst, you'll have to adjust a few settings once you install the flywheel that you would have had to adjust anyway.

 

Thats good to know about the "Base Mod" map, i diddnt know that.

Hey rynberg

Im still new to this but i dont see why the PFC needs to be tuned for the dropping revs since it should still be the same amount of fuel at idle regardless of the rate the flywheeld drops? Shouldnt the PFC be responding to what the tps and other sensors tell it regardless of the rate? Im not arguing what you said im just curious myself.

 

Like I said, the flywheel shouldn't have an effect on the PFC's idle learning (ok, it could, but nothing major). It's the transition in off-throttle that may need adjusting.

Let's say you are driving along at 3k rpm and you hit a light and you push the clutch in and take your foot off the gas. Once you close the throttle, the PFC will shut off the injectors completely. Once the revs drop to a certain point, the PFC will kick the injectors back on so the car will maintain a constant idle instead of stalling. When you install a lightweight flywheel, there is less drivetrain momentum and the revs will drop much faster. Now when the PFC goes to kick on the injectors at it's preset point, the revs are dropping much faster and the car bogs down and almost stalls (or does stall) before the idle will recover. If this happens, you'll have to raise the rpm point that the PFC turns the injectors back on -- resulting in a faster recovery to stable idle.

This really isn't a big problem and if it does occur, should only require a small adjustment.

 

Hmmm, so that could be why i sometimes stall when approaching a stop and clutching in--with a lightweight flywheel. I'm assumining the settings "to raise the rpm point that the PFC turns the injectors back on" is located failry easily?

Thanks,
Edgardo

 

Yes, it's right on page 33 of the owner's manual (under the "Rev/Idle" menu under the "Settings" menu).

 

Doh!! Me too!! Thanks Tyler!

~Ramy