MichaelFregoe

iTrader: (1)

Hello,
I need for some of you to do a quick little test of your cars for me. Bring up the Sensor monitor function of the PFC. And with the car warm push in the clutch. Shift through the gears and see if the neutral circle darkens even if you shift quickly.

My car is having some minor issues. NOT always does the little circle turn black when I shift quick. But sometimes it does.. This is affecting my sequential Turbo’s. I am specifically not going into my problem because i do not want this thread to get "off topic". Thanks.

MichaelFregoe

iTrader: (1)

Has anyone done any testing? I want to hear from some of you before I post my results and buy a new neutral switch ($$) for the car.

NeoTuri

iTrader: (2)

I'll try it tonight.

MichaelFregoe

iTrader: (1)

Thanks!

MichaelFregoe

iTrader: (1)

Thanks!

reza

How does it affect the sequential turbos? In what way.

MichaelFregoe

iTrader: (1)

It has to do with deceleration or some other situations. The neutral signal under some situations causes the sequental setup to switch back to just the primary turbo. In my situation my switch is very intermittent and sometimes I can shift and have the car at relatively low rpm (after the dhift) and at low speed and I running both turbo's. On the shift where i see a Netral signal on the PFC it works perfectly

reza

Well...the default 5.08 maps are the following

60% throttle(TPS) Low is 3000 and High is 4080.

The low is when it switch back to primary only.
The high is when it switch to primary and secondary running together.

When you are accelerate with >60% throttle to 4500rpm, you have both pri and sec running.
You then upshift to 3rd gear. And you are back to for example 2800rpm. The ECU will switch you to primary only, because the condition is the RPM <3000.
I hope you understand.
With datalogit you can make this changes to e.g. 2500rpm, thus when you upshift it will stay in pri and sec running.
The turbo control has little to do with the neutral switch, as far as I understand. So take this info with care, because I am not that experience, but have played with these settings.

MichaelFregoe

iTrader: (1)

I know all that. That is why in my first post that I specifically did not mention the "logic" that defines turbo operation.

I know that the neutral swith can and will bring the car out of sequential operation. Mine does WHEN IT WORKS. That it why I asked for other people to see if thier switch consistantly signals the ECU on shifting . I looked at a logged data log run that someone did and the neutral switch was logged on every shift.

MichaelFregoe

iTrader: (1)

What kind of throttle response do you get with both turbo's running at 3100 RPM in 2nd gear? Big turbo lag I'll bet? right? Mine is... but.. If I put it into netral for a split second (and I get the signal at the PFC) it drops back to primary turbo only.

reza

I set mine to low 3780 and high 4080.

That way, I get single turbo after upshift/braking.
Quick turbo spool from the primary is what I want...

NeoTuri

iTrader: (2)

I tried it this morning and noticed that the PFC did not light up every time I shift, but that doesn't say much if I did it faster than the refresh rate of the user interface. The PFC still might have been able to pick it up.

skotx

Just curious, are you determining the mode you're in (primary only or both turbos) based on the sluggishness of the car or by using the CCN / TCN switches on the sensor screen? Those two switches are mutually exclusive, i.e. when one is on the other should be off. In primary mode, CCN is on, TCN is off. The opposite is true in secondary mode.

You may already know this. If not, it could help you troubleshoot further/more accurately.

MichaelFregoe

iTrader: (1)

I have determined the mode with the CCN and TCN indications as well as with a vaccum pressure guage "T"d into the associated lines so I can see things working. Also I can hear the change in the exhaust note when the turbo control valve is open. Most importantly I can feel the car not have any power and have very slow boost response above 3000 RPM when in sequentail mode.

I know if when I shift just slow enough to see the neutral indicator flash (even very briefly).... The car drops out of sequential mode reguardless of RPM (3000-4500).

I can't finds anyone whom knows if this is supposed to happen (even with the stock ECU). KD was very happy to sell me the PFC but it has been very diffacult getting any customer support on it. (on the phone). Dave said my secondary turbo is slow to spool and causing this, I drive the car every day and do not subscribe to that. I have perfect transition (when accelerating and stong boost until I decellerate below 4500 RPM and above 3000 RPM. I think that my issues are a "logic" associated problem with the ECU. If I didn't have the bigger secondary injectors I would just ditch the PFC and go back to the Pettit remapped ECU. In my opinion for the daily driven sequential car it is a better option. Since I went to the PFC I have had this boost response issue and the A/C issue.

If the PFC needs a good clean A/C signal to operate the A/C properly.... who's to say it does not need equally clean signals from other sensors? That is where my question about the neutral switch comes from. This would be so much easier if KD would just call me back (Dave himself).

Sorry for the rant... Mike

reza

Well...on mine, the low setup is 3780, so that it drops back to primary mode anytime the RPM drops below that.
Previously with 3000, it is just annoying, because during autocross, it stays in secondary mode, and I got no power coming out of turns....

MichaelFregoe

iTrader: (1)

Reza.. It sounds like our cars are having the same issues. I never had this issue with the stock ECU. Your solution might be what I do (Change the deceleration transition point). I am goign to persue the neutral switch and see if it fixes my issue before I buy the Datalogit.