Hi everyone im the proud owner of a Ford Saphire Cosworth full leather in nearly original condition apart from the massive rs 500 intercooler ive had the car for 16 years the problem is i have a friend who has a Vauxhall Astra Turbo thats standard and is really fast it has a smaller turbo on it that doesnt suffer from turbo lag and it is murdering my Cossie any sugestions on what i can do to stop this happening ?