03-12-2014, 08:32 AM
Mate of mine has the perfect example. Saab 9000 Turbo bought for £310 with MOT off eBay, budget stands at about £1700 and last dyno was 515bhp. Basically just bigger turbo, bigger injectors, high lift cams and a straight through. Standard internals though so it will explode at some point soon but he already has a spare engine ready.