Where are the missing pfl auto 20hp?

[kinkyafro]

Ok so...

PFL Auto = 260hp
PFL Manual = 280hp

I am confident that there is no difference in the metal cased md340298/md340288 ecu maps (As I've looked).

So where are those 20 horses hiding /Hmmm?

[AlanDITD]

throttle body, and inlet runners different sizes!

[wintertidenz]

Don't they run different boost? Autos 7 psi, and manuals 8-9?

[miller]

doubt the 10mm difference in throttle body is worth 20hp, though could be a starter. Where has the 260bhp come from officially?

[Adam.Findlay]

Don't they run different boost? Autos 7 psi, and manuals 8-9?
i would agree. Before i got mine I had heard of 2 people with autos on 7psi in my home town and then i bought a manual one and boost gauge reads 9psi stock, but i am facelift

[giblet]

Going by the massive write up by brad, its different boost, 7 and 9!

[Nutter_John]

Don't they run different boost? Autos 7 psi, and manuals 8-9?

the maps are the same as Rich says , so unless the actuators are different you would open at the same point

[Turbo_Steve]

Unless the solenoid has a different sized bleed port?

[kinkyafro]

What about this restrictor pill thingy?

Picture shamelessly robbed from RPW. (http://www.rpw.com.au/shop/index.php?option=com_content&task=view&id=221&Itemid=40)

Interestingly the car in question is madhav's pfl auto. Anyone with a manual or facelift seen this in there car?

[Nutter_John]

yeah did think of that but need to check a manual pfl and a fl if they have the pill

[AlanDITD]

What about this restrictor pill thingy?

Picture shamelessly robbed from RPW. (http://www.rpw.com.au/shop/index.php?option=com_content&task=view&id=221&Itemid=40)

Interestingly the car in question is madhav's pfl auto. Anyone with a manual or facelift seen this in there car?

thats for the traction control.

[AlanDITD]

yeah did think of that but need to check a manual pfl and a fl if they have the pill

hmm just so you know, mine was pfl it def had one of them i never worked out what it was for :P

thouse solenoids though as far as i knew, were for the tcs system, i thought the boost solenoid was located under the throttle bodie area?

[Nutter_John]

No that is in the boost bleed solenoid not the tc one

[AlanDITD]

No that is in the boost bleed solenoid not the tc one

you learn somthing new every day :D
always wondered why there were two of them!

[wintertidenz]

The solenoid beside the boost one is the fuel pressure solenoid, think the TCL one is on the firewall.

[Nutter_John]

The solenoid beside the boost one is the fuel pressure solenoid, think the TCL one is on the firewall.

yep thats correct

[AlanDITD]

yep thats correct

im confused.....i had two solenoids on the firewall next to the canister....what are they then? boost, fuel, or tcs?

[Nutter_John]

TC and ASC

the FP and Boost are under the inlet elbow

[AlanDITD]

TC and ASC

the FP and Boost are under the inlet elbow

ahhh ok, confusing as they all look the same, going off the pic above

[kinkyafro]

throttle body, and inlet runners different sizes!

These differences aren't present on a pfl manual are they?

[Turbo_Steve]

don't think so.

[peter thomson]

I've posted this a few times that the auto ecu effects boost. We have a preface ecu in keiths VR4 and when fitted max boost dropped in his facelift. This was restored with the use of an mbc for the present.

[Kieran]

TC and ASC

(Pedant Mode):book:

Not *quite* - They're both for the TCL system. One's the vacuum control solenoid and one's the ventilation control solenoid. What happens is the plastic tank is 'Charged' with Vacuum during normal operation (i.e when the plenum's in vacuum). When the vacuum control solenoid opens, it creates a vacuum in the space beyond, which pulls upon the TCL diaphragm on the throttle body. This pulls back a linkage which closes the throttle butterfly by a certain amount (dependent upon the amount of vacuum being exerted). This is also why you have a tank, so that you have a reserve of vacuum for the solenoid to play with, so that it can regulate the amount of throttle closure.

When the TCL-ECU is happy that you're not going into a ditch, it opens the ventilation control solenoid. This vents to air, thus depleting the Vacuum holding the diaphragm open. The diaphragm duly returns to its normal position and stops closing the throttle butterfly.

[kinkyafro]

I've posted this a few times that the auto ecu effects boost. We have a preface ecu in keiths VR4 and when fitted max boost dropped in his facelift. This was restored with the use of an mbc for the present.

How did you measure the boost drop? What was the previous ecu - a plastic cased md340289?

Edit:
Or do you mean having a gearbox ecu connected reduces boost?

[peter thomson]

Yes I mean the AT grearbox ecu and a .2 bar drop measured by a fitted boost gauge.

[bradc]

So prefacelift engine ecu and an auto gearbox ecu installed as well. Did you double confirm that a facelift engine ecu didn't do it?

[peter thomson]

It was with the facelift engine ecu and a preface AT ecu. We tried combinations of both when trying to get the gearbox working correctly including using a manual preface ecu. Keith spent a lot of money on ecu's at the time

[swinks]

So, to have properly flashed pfl, we shall also flash a/t ecu?

Things get more complicated methinks!

[Nutter_John]

no just cut the comm wire ;)

[Kitty's VR4]

I'm pretty sure Peter is correct, its the A/T ECU that is causing the boost to be brought back. IIRC from doing the Engine & A/T ECU pinouts, on the Eng ECU C-35 Connector 2 - Pin 16 gets a signal from A/T INVECS II ECU Connector 3 - Pin 71, which then triggers Eng C-35 Connector 2 Pin 13 Wastegate Soleniod.

If I get a chance over the weekend, I'll dig out my notes from doing the ECU pinouts and confirm this.

Now that I have a manual for the series 2, I'll get the Series 2 ECU pinouts done, but I'm pretty sure that how it all works IIRC.

[Turbo_Steve]

Does anyone own an oscilliscope?

[Kieran]

Does anyone own an oscilliscope?

Yes. But I don't have any probes and I don't know if it still works.

[kinkyafro]

I'm pretty sure Peter is correct, its the A/T ECU that is causing the boost to be brought back. IIRC from doing the Engine & A/T ECU pinouts, on the Eng ECU C-35 Connector 2 - Pin 16 gets a signal from A/T INVECS II ECU Connector 3 - Pin 71, which then triggers Eng C-35 Connector 2 Pin 13 Wastegate Soleniod.

If I get a chance over the weekend, I'll dig out my notes from doing the ECU pinouts and confirm this.

Now that I have a manual for the series 2, I'll get the Series 2 ECU pinouts done, but I'm pretty sure that how it all works IIRC.

Thats interesting I'd always assumed that the A/T ECU had an on/off relationship with the wastegate rather then a variable input. Makes me think about opening one up to see whats there... don't spose anyone has pics of a pcb?

[Turbo_Steve]

It'll be driven by duty cycle, like all the solenoids, dude (even the Carbon canister purge, which surprised me!)

What would be of more interest is what goes on between the TCU and ECU, as it's definitely some kind of comms signal.