You misunderstood me, I meant partially..
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I've made an intervju on eyvind brynhildsen at rallyradio at aurskog-hølandsrally, 5th round of norwegian championship. He started with his new fiesta rrc, and he said it was equal to the R5 he drove last year.
So suspension is the main disadvantage of R5?
How does the engine compare to RRC and WRC in performance? I understand restrictor is bigger but it has to be based on a road car engine whereas the WRC engine can be custom built.
RRC is WRC but with smaller restrictor, different flywheel and different spoiler kit
R5 has according to MSport 90% different parts from the RRC. Diff in engine, suspension (4 equal corners) also gearbox and other major parts.
Speedwise they are more or less the same, but think the RRC is tougher!
R5 32mm restrictor + 5 speed gearbox
RRC 30mm restrictor from Ford rrc sales document (mini rrc sales 30mm too) on wrc 31mm (http://www.wrc.com/en/wrc/about-wrc/...053-672--.html) + 6 speed gearbox
do you know which is the right mm restrictor or wrc allowed 1mm larger width restrictor last year? I didn't find the news on the web....
Can we assume there is no difference on performance r5 vs rrc on tarmac?
R5 has 32 mm and RRC 30 mm but the engines use different levels of tuning. RRC engines are tailor made racing units while R5 engine is tuned stock engine. As stated before the gearbox is as well better in RRC with six gears available compared to five of R5. Anyway the main advantage of RRC is that all its parts are made specifically for the rally use while R5 uses many parts from stock production hence it is less reliable especially in rough conditions. On the other hand RRC is at least 2x more expensive to run.
manthey: There are many very different kinds of tarmac. Catalunya is completely different than Barum, Sanremo is completely different than Ypres etc. I don't think that it's possible to simplify it so much. For example on bumpy surface here in CZ or in Belgium teams have been struggling with Fiesta R5 setup.
In general R5 is accelerating a little bit better, but RRC turns better, as it has more advanced and stronger suspension. running cost of RRC is same as WRC, so way more then R5. Which car is faster depends on stages characteristics.
How do 'real life' power and torque figures compare R5/RRC/WRC then?
Fabia R5 test in Greece (more recent one)
https://www.youtube.com/watch?v=5B6cuZjAe5Y