Ecu - Reprogram

[lexus boy]

Right when i put the 19's on i wondering how i get the ecu reprogrammed or chipped or whatever, it's just obviously i will get my phot taken by every speed camera otherwise.

also can you get the is200 super chipped? just a query

[aido]

Not sure what you mean here, why are you going to get flashed by speed cameras if you don't have the ECU reprogrammed?

If the ratio of the new alloy and tyre is correct then the speedo should still show the correct mph reading - you could always invest in a GPS speed camera detector unit as they'll work out your speed via GPS so are more exact than the speedo (it usually +10% most of the time anyway).

You can get piggyback ECU's for the IS, Dastek do the Unichip and there are other units like the GReddy EManage, HKS FCON etc, they're not cheap though and need setting up properly on a rolling road - they won't give you a massive performance increase like you see on other cars - they do help if you have other mods such as induction and exhaust upgrades but don't expect massive leaps, maybe 6 - 10 bhp on a standard NA car? They work better with forced induction, ie in conjunction with a turbo or super charger.

[lexus boy]

well clearly you have a larger circumfrence of the tyre, therefore for one revolution you will be going a greater distance.

therefore you will be going a greater speed than your speedo says.

or am i being thick?

[aido]

You just get lower profile tyres mate to balance it all out.....

There's a conversion chart somewhere, I'll look it up

[aido]

Try this pal:

http://www.performancetyresdirect.co.uk/co.../converter.html

[lexus boy]

thanks for that

I was just trying to make things far too complicated for their own good!