Stock internals guestion

[Dave]

Yeh they can, but it's just as easy to f*ck things as it is to improve performance. They're a pretty key part in fuel/air mixture so adjusting it is pretty fine, in sure Ruan will be along soon to shed some light on it. There was only one case on the net I could find with someone actually modding them, and this was on a big ford v8 and basically the results were pretty atrocious - they give slightly more power very very top end but upto there is was just smokey with poor performance. I've opened mine up slightly but you can get haze etc with even the smallest change my heads been off many times.