WRC Engines

[janvanvurpa]

So your trying to tell me every WRC engine is singly describe by one set of rule (i.e. Limitations). Every manufacture has their own take on the engine regulations that why you see VW dominating because their engine is much strong than the rest. The formula one has limitations like the WRC and I don't see Renault and Mercedes with the same engines, likewise with Citroen, M-Sport, VW, Etc. The 2007 Subaru WRC 2.0L boxer looks, sounds and performs just like the Citroen C4 WRC 2.0L I4...... I don't think so.

So much wrong....You evidently are new to this sport and obviously don't understand what different things inside the engines mean in practice...
The 07 Subaru does not sound and perform just like all the other engines..
The bore on that was 92mm, virtually all the others were 84 or 85mm or max (Evo 10) 86mm..
This make a difference in the max possible dynamic compression ratio and max boost for a given fuel..
So limiting is this bore size thing that the Duratec Fords in the Fock-us which stock was 87.5mm was reduced down to 85mm..and stroke changed to 89 to compensate..
Has to do with flame front propagation and distance to complete a burn..
It is one reason why Subies began to be less effective...and the proof of the pudding is the new Subie/Toyota BRZ thing they changed bore down to 86mm and stroke 86mm..
They wouldn't have changed it just because they were bored, they changed it because fuel only burns so fast and they wanted more complete combustion..

So not to be too mean, often it doesn't matter what we "think" if the reality of what 'is" is different..

The VW engine is not "much stronger" if you do the math and see the difference expressed in %..

The differences in SS times to other works cars is oten less than 0,15%...That cannot seriously be considered "much stronger" or faster...


Hard to discuss using only opinions and not measuring anything or comparing dimensions, and numbers...