I firmly believe (but have no proof) that the inlet cam needs advancing around 10 degrees to improve torque on the 190. The reasonfor saying this is the inlet valve on the 190 opens at tdc - this is just about unheard of on anything other than lawnmowers. I belive it was done to improve emissions for the 190 with the increased valve timing.
Also, as further evidence, look at the 16v k series, closely related in many ways, again opens the inlet valve earlier. Usually, advancing an inlet cam will, up to a point improve midrange torque, at the expense of top end bhp. And who needs 190 bhp anyway? Its only there as a sales gimic, in my opinion.
There is one possible fly in my theoretical ointment however, the poorly designed exhaust front pipe, it may be that the back pressure from this could reduce the effect of increasing overlap, but its a slim chance.
Also, the ehaust timing would need to be adjusted to keep it where it is.
Huw
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