Quote Originally Posted by pfcs View Post
Despite all the efforts put into the B20E unit (at least before the open ECU), despite countless header changes/collector designs. near zero leakdown, etc, the best we ever saw out of the (130hp stock)motor was 149hp. 15%!
Phil - I have to respectfully disagree with your math... well actually, not your math... but your assumption of stock horsepower. The Volvo 130 hp rating was SAE Gross, evidenced by the fact that the exact same engine was rated at 124 hp DIN in Europe. And it was the exact same engine, as there were no differences at that time (1971) between US and European powerplants coming off the Volvo line. I have some calculations/cross-references somewhere to back this up, can't find them ATM... but I believe the stock '71 Volvo B20E was in fact a 120 hp engine SAE Net. This would put your 149 hp dyno number in the neighborhood of a more typical 24% increase over stock.