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It is said that EFI will not increase power but make the car more streetable.
The difference in HP are related to the big difference in the compression ratio. The 2.7 from Tafel has 11.8 and the Boxershop 2.9 has 8.5. If I am not mistaken this will have an effect on how effective a high duration cam is going to be if I paid enough attention to the heated debates over at shoptalk a couple of months ago. There is also a difference in DIN hp and US hp. It was said that German DIN HP is 10% lower than the US HP number.
Alex
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