I have one of these and it's driving me crazy - i've also got a UK clock. I want to be able to see the MPH rather than KMH that the TRD clock gives me. Problem i have come across is that once the 180 mph UK clock is fitted the caliberation is wrong and it reads asif its a 110 MPH clock.

What should i do - get a mook special and stick it on the TRD clock, or can i attach a gizmo that sorts out the caliberation?

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ST205




"And God said, Let the earth bring forth grass, and the earth brought forth grass and the Rastafarians smoked it."

Don't quote me on this but I think you can get a gizmo that recalibrates the KPH to MPH.

I also think you need to get a certificate of authenticity or similar if you have it recalibrated and clocks changed to proove they haven't been clocked.

Again please do not quote me on any of the above as I don't actually know for sure

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Loosey
Loosey@gt4dc.co.uk
Storm Blue JDM ST205
Super White JDM ST205
http://www.gtfours.co.uk

Some people are like a Slinky .. Not really good for anything, but they make you smile when you shove them down the stairs!

You're right..

When I was looking for my CS I also looked at importing an RC. There were a few kickin about with the 180 kmh speedo, but converted to MPH, so still up to 180 on the scale. Maybe you can ask importers like NewEra?

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René - Carlos Sainz 2433•5000
Turbocelica.nl | ST185 CS restoration and full rebuild

If it ain't broken.. it soon will be

On mine Motormall (Neweras main UK worker) stuck an MPH sticker over the KMH writing on my clocks, then rolled the digits forward.
The KMH to MPH was done as part of fitting the fuel cut defender & speed delimiter, same box does all 3 functions functions.

Motormalls website is here http://www.motormall.co.uk/

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ST205 WRC #0002249

In a 205?

I thought that was bad.

Though recently I have heard of a different type that is ok. But I don't fully understand why.

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JDM ST205 (286bhp and 281lb/ft)
JDM ST202 (Finally sold )
1982 Pontiac Trans Am 5.7L V8 (See my website)

The TRD speedo is a 300 kph model...

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ST205




"And God said, Let the earth bring forth grass, and the earth brought forth grass and the Rastafarians smoked it."

Yeah heard the same but I've had no problems YET tho so fingers crossed

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ST205 WRC #0002249

Rob > From the explaination above, I would reckon that if the 300kmh dial is an extension of the normal 280kmh Euro spec jobbie, then the standard converter will do the job nicely.

If it's different, it's not so easy - we could do a custom jobbie with calibration amended to read accurately, but that would require a bit of jiggery pokery from yourself with the likes of a GPS to get the correct 'scale' to convert to. This would be with either the UK or TRD clocks. Make sense?

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'92 GT-Four RC - Project Rufus - something of a mover.
'05 Audi A3 3.2 V6 Quattro S Line - not bad for a daily.

oh blimey - is this car ever going to get easier ... sheesh - thanks guys!

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ST205




"And God said, Let the earth bring forth grass, and the earth brought forth grass and the Rastafarians smoked it."

Get me a pic and I'll be able to give you the options

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'92 GT-Four RC - Project Rufus - something of a mover.
'05 Audi A3 3.2 V6 Quattro S Line - not bad for a daily.

I'll get on it tomorrow mate - thanks for your help
cheers
Rob

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ST205




"And God said, Let the earth bring forth grass, and the earth brought forth grass and the Rastafarians smoked it."

i would like to hear more on this....what do you know about the FCD that was fitted? i take it you understand the problems a 205 faces with fitted with a conventional FCD?

......which are?

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Don
GT4DC Chairman
1994 Toyota Celica GT-Four ST205WRC JDM 269bhp @ 0.9bar
1994 Toyota Celica GT-Four Special GT 590bhp @ 1.8bar
1989 Van Diemen RF88/89 Formula Ford 1600
2008 Nissan Patrol GU 3.0L ZD30DDTi 154bhp

i thought you were aware of this don?

to paraphrase extensive posts elsewhere, a FCD alters the signal recieved by the ecu regarding the air pressure in the manifold. on a 185/165 this parameter is not used to control fuelling, only to move the dash boost gauge.

however, a 205 uses the manifold boost pressure sensor (MAP sensor) as one of the major inputs to the ecu when calculating injector pulse.

what a fcd (speaking about the plain jane diode versions here, remember the vernier diode?) does is adjust the reported voltage by a certain percentage.
lets say that 17psi(afaik this is stock fuel cut/ecu limit?) on a 205 is monitored by a 1v throughput on the MAP line. when the ecu reads a 1.1v on the MAP line, this is known as overboost and the fuel cut mechanism cuts in.

this is where the FCD goes into play. If you can adjust the FCD so that you can run 22psi boost without hitting fuel cut, the output of FCD is still 1.0 volts. that is to say, the ecu thinks you have 17psi worth of air going in, so it injects 17psi (+correctional trim for other considerations) worth of fuel. but this is actually incorrect, as 22psi worth of air is being forced into each cylinder. a direct result of this is the air:fuel ratio being WAY out of spec. 14 parts air to 1 part fuel is the "perfect" combustion ratio for a petrol engine, however under turbo conditions 12.4:1 or lower is desired (from a longevity point of view).

what is actually happening when fitting a classic FCD is the ecu is being fooled into thinking a much lower amount of air is being combusted, and thereby running lean. running lean whilst under load is bad!

i hope that explanation clears things up in laymans terms. i have tried to explain the operation as clearly as a i can.

its worth noting that the 185/165 measure boost in a totally seperate manner and the primitive MAP sensor they utilise can be bypassed entirely without any problems (provided you dont boost into infinity).

*not to be taken as exact figures, but the principle is sound.

That was how I understood it andy but I must admit that I didnt know about it before I had the car imported & the FCD fitted

Not sure what FCD it was, all I know is that the same box of tricks does the FCD, Speed sync for the clocks & de-limits.

Maybe I dont have problems because I run .9 Bar 80% of the time, .95 Bar 19% of the time & 1 bar 1% of the time (With overboost no more then 1.05 Bar in winter)

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ST205 WRC #0002249