If you are serious about tuning, head work is an absolute must. It's probably one of the most important aspects when it comes to tuning a car, as the head is one of the most restricitve parts of any engine. Have a read of Guy Crofts forums for an insight into how complex it can be. Headwork will improve almost every aspect of an engine.
Problem is of course, it's not a job your average spanner monkey can do with a dremel. So you need to pay for someone who knows what they are doing, it then get's expesnive and £/BHP Gain ratio decreases somewhat, At this point you may have well just strapped a turbo or supercharger to it, it all depends on what you want to achieve. Or of course you can buy a faster car in the first place!
To the OP are you going to do a before and after tuning rolling road session? I've read a few reports on here of gains, but have never seen a before and after tuning graph. It seems people claim xxx BHP but base that on the assumption they were at xxx before. I'm always interested to see what improves what etc.
Last edited by benje; 15-04-11 at 10:56.