OK, back on stock ECU and I cannot notice any real difference in performance.

I drove home last night with the AVC-R boost controller off and got a knock of 40 as shown on the power commander.

I assume there is no way of reading knock on the stock ECU?

I had a look and the downpipe only has the hole for the stock sensor.

If anyone coming to rally day has any spare holes for an AFR gauge, feel free to bring one along

Going to run stock ECU for rally day, but can always put the PFC in if anyone want to tinker a bit?

_________________
[color=#000080]ST205 WRC 1994
Hybrid turbo
Apexi AVC-R
Apexi Power FC (Not being used ATM)
Apexi Power commander (Not being used ATM)

Is it still juddery?

No, seemed OK, I did not notice the problem where under hard acceleration there is a sometimes a momentary loss of power and then pulls OK again. Then again, I do not get it all the time with the PFC.

I need Nibbles to drive it again, he knows how it was driving with the PFC

I will see if Dan can give it a go, and see what he thinks as well.

_________________
[color=#000080]ST205 WRC 1994
Hybrid turbo
Apexi AVC-R
Apexi Power FC (Not being used ATM)
Apexi Power commander (Not being used ATM)

The wideband bung is normally down near the bottom of most downpipes.

The AEM gauge I bought has a bung you can weld on.

_________________
If at first you don't suck seed, try drier grain.

The wideband boss is normally on the bottom of the downpipe http://www.gtfours.co.uk/pics/dp/aussie/dp.htm

If you haven't got a boss for wideband on your downpipe there are ways of doing it but it is much more difficult.

The juddering was caused when Chris went from full throttle on boost and slowly let off the gas pedal to around 50-80% throttle I believe.

_________________
JP
GT4DC Treasurer

Grey St185 RC
Silver BMW E46 M3
Multicolour yawn Honda VFR400
Silver Honda Civic Type-R

Yes, I had a look and feel underneath and cut my finger on one of those thin heat wrap retaining straps, still could not feel or see anything?

Welding? Yum Yum

To be quite honest, I am not sure what the PFC has gained me so far except a lighter wallet and problems I did not have, or did not notice before?

_________________
[color=#000080]ST205 WRC 1994
Hybrid turbo
Apexi AVC-R
Apexi Power FC (Not being used ATM)
Apexi Power commander (Not being used ATM)

Often the way with modifications. Toyota spend millions on R&D and produce a compromise of reliability, comfort, performance and ecconomy. Change anything they have done, and at least 1 will be sacrificed - most often reliability.

_________________
If at first you don't suck seed, try drier grain.

Just found this AFR, exactly what I would want as it has an audible/flashing warning system.

Seems best to be allerted before the big bang
Cannot seem to find a UK seller though.

http://prosportgauges.com/halo-wideband ... gauge.aspx

_________________
[color=#000080]ST205 WRC 1994
Hybrid turbo
Apexi AVC-R
Apexi Power FC (Not being used ATM)
Apexi Power commander (Not being used ATM)

Unfortunately I can't see how a warning for AFR will work.

For normal driving you want 14.7:1 AFR and at high boost 11:1 ish but at high boost a leaner mixture is dangerous so you can only warn against serious overfueling. It may stop you getting bore wash but will not give you any warning of detonation which is the main killer of engines.

_________________
JP
GT4DC Treasurer

Grey St185 RC
Silver BMW E46 M3
Multicolour yawn Honda VFR400
Silver Honda Civic Type-R

Agree. The only way to to include boost in the equation. Ideally should be done in the ECU comparing target AFR against actual AFR and issueing warning or even cutting ignition if it goes outside limits. I've never heard of an ECU with this function though. Maybe I should go for my megasquirt idea after all.

_________________
If at first you don't suck seed, try drier grain.

If it is set to go off at some level when expected under high boost it can be ignored?

But if it goes off when not expected then back off?

Like fuel pump failing?

Just shows I have no idea what I am talking about

_________________
[color=#000080]ST205 WRC 1994
Hybrid turbo
Apexi AVC-R
Apexi Power FC (Not being used ATM)
Apexi Power commander (Not being used ATM)

Your reasoning is sound but the AFR meter has no way of knowing what the boost is - it is just too dumb for what you want to do and hence a clevererererer ECU would be required and even then most are too dumb to do anything but warn you "excrement is flying in to the fan" under the bonnet!

_________________
JP
GT4DC Treasurer

Grey St185 RC
Silver BMW E46 M3
Multicolour yawn Honda VFR400
Silver Honda Civic Type-R

So, if the AFR meter mark x (new type yet to be invented) monitored the boost as well as the AFR, it would know when things are going wrong?

Nibbles, got your soldering iron, and Pascal?

Seriously, there seems to be a big gap in the market here.

Nothing saved animal66 or ferdy's engine? and how many others?

But, what do I know?

_________________
[color=#000080]ST205 WRC 1994
Hybrid turbo
Apexi AVC-R
Apexi Power FC (Not being used ATM)
Apexi Power commander (Not being used ATM)

Pascal ? Learned that at Uni, never gets used in industry. I mainly use C.

I have a little box of tricks in my 185 to monitor the engine and sound a (loud) buzzer if things go wrong. AFR, boost and knock will all be plumbed in when I get round to it. So far it's only monitoring coolant and intake temps..

_________________
If at first you don't suck seed, try drier grain.

Just out of interest, I pulled Jon's map from his 185 after Rally day.

Here is one view.




Is there a way to post the .dat file on the forum?

_________________
[color=#000080]ST205 WRC 1994
Hybrid turbo
Apexi AVC-R
Apexi Power FC (Not being used ATM)
Apexi Power commander (Not being used ATM)