Chips

[wildrnes]

what do they do?

ecu ones

[tdiplc]

As far as I know there aren't any "chips" available for the is200. If I remember correctly one of the guys here bought one from a Swiss firm, but was no suitable and had to be returned.

We offer a Dastec ecu which is a custom mappable ecu which works nicely.

Hope this helps :)

[wildrnes]

erm so what do they do

i understand you can re map the ignition and fuel

but what does that mean

i dont need petrol in my headlights :mat:

[Matthew_McNally]

erm so what do they do

Mat

there was a really good explanantion of this a few weeks ago - but I can't bladdy find it

could have swore it was by Tony Goose - have had no luck searching

[Zee007]

Posted by Tony Goose on May 12th 2003:

Engine management computers decide how much fuel to inject into the engine and when to generate the spark to ignite it based on inputs from various sensors. These could be in areas such as exhaust gas, coolant temperature, inlet manifold pressure, turbo boost pressure, engine speed and so the list goes on.

It's like a big 'look up' table. So the ecu might say ...

Exhaust gas reading is 'A', Coolant temperature 'B', Engine running at 'C' rpm.

So according to my look up table i must ....

Open injectors for 'X' milliseconds + generate spark at 'Y' deg before piston reaches top of stroke.

This 'look up' table or 'map' is the heart of 'chipping'. The 'chipper' replaces the standard 'map' with a different one. Standard maps are normally a compromise of performance and economy / emissions. Chipping would generally aim to tilt the balance in favour of performance.

Some maps are on a memory chip and can be replaced with a custom one - hence 'chipping'. If this isn't possible, a supplementary computer (piggyback ecu) is used - such as the 'unichip'. These wrap around the stock ecu and alter it's inputs and outputs as required to achieve the required effect. Taking IS200 as an example, TDI use a unichip to achieve a modest power increase AND reduce fuel consumption ... Blimey

As for supercharger 'chips', the earlier kits contain a small black box. This intercepts the manifold pressure signal before it reaches the ecu which expects to see a vacuum as air is drawn in but would see positive pressure as the supercharger forces air through instead ...

Well wouldn't you be confused if expecting to suck but getting blown instead

Later kits have a larger silver box which does a similar job but provides additional protection from fuel cut off - to protect cat converters from meltdown apparently.

That's my rather simplistic view of things - hope it helps

[wildrnes]

erm ok

how much

and where in the north west

[Matthew_McNally]

Posted by Tony Goose on May 12th 2003:

^

||

yup! thats the one.

nice one Zee ;)

[Zee007]

erm ok

how much

and where in the north west

I've PM'd you..... ;)

[TonyGoose]

Posted by Tony Goose on May 12th 2003:

WOW ...

What a very informative and extremely well written description

Fame at last

[GXE10]

i know powerchip in australia have a chip for is200, but don't really believe 100% on what they claim

u can try trust emanage, i heard is quite good

[mudzs]

Do they do one for the gs300 as all the power seems to be in the upper revs

[tdiplc]

The Unichip (or similar) can be applied to the is200 and GS300. We have done quite a few now.

[wildrnes]

so if i fitted one of these to my car

i could connect it to a lap top and bugger up my car

how do i get rid / move the rev limiter ?

[Gus Woodcock]

Mat

You could try Van Aaken in the Uk who do custom ECU upgrades for our car. Visit vanaaken.com to take a look.

Gus

[wildrnes]

cool see you on sun

[tdiplc]

so if i fitted one of these to my car

i could connect it to a lap top and bugger up my car

how do i get rid / move the rev limiter ?

Unlikely, unless you got hold of a copy of the software for remapping (which is licenced), and decided that you wanted to change the settings.

I would advise against changing the rev limiter settings until you invest in a decent set of rods and pistons.

Mark :)