I read on another website that Vaux will update Z20 LET's on the 189bhp map to the GSI 197bhp map ... and it doesnt cost much...
Is this true?
they can flash your ECU with the latest map, it doesnt 100% give you more BHP but will be the optimum map vauxhall have at the time for the Z20LET. Some dealers will do it for you on an hourly rate others will only do it if there is a problem with your car in attempt to fix it. Usually flat spots
I had the new gsi map put on the 888 at Courtenays immediately prior to the CS3 map being put on.
It won't give you more power. Vauxhall just became more honest about the Z20LET's real power when the Astra GSi came out. Courtenay have tested old v new maps and found no power difference at all.
You may notice driveability is better with a new map though - especially if you get the GSi map. The Vauxhall garage is unlikely to upgrade a Coupe map to a GSi map though, unless you know them or they are into mods.
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