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Thread: Rally2 (ex-R5) News
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26th November 2017, 06:04 #4781Senior Member
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26th November 2017, 11:28 #4782
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26th November 2017, 12:11 #4783Senior Member
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Does this make sense: http://www.carmag.co.za/technical_po...s-shortstroke/
So for rally the longstroke gives a bit more torque in low revs, is that the main advantage?
in the two litre era they used to be square did they not?
I thought the modern turbos compensated for this.
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26th November 2017, 13:14 #4784Senior Member
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I am not engine engineer but if I remember the main issue with such small bore engines is that the piston is so small that there is not enough space for larger valves. For sure there is a reason why purpose-built WRC engines have large bore and short stroke - Polo WRC bore/stroke ratio 1,125; Fiesta WRC 1,123; C3 WRC 1,167. Now compare with same size R5 units. Fabia R5 1,088 (based on 1.8 stock engine with shortened stroke); Fiesta R5 1,192 (based on 2.0 stock engine with shortened stroke); C3 R5 0,897 (based on stock 1.6 engine).
Stupid is as stupid does. Forrest Gump
- Likes: electroliquid (26th November 2017),Sulland (26th November 2017)
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27th November 2017, 09:26 #4785
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27th November 2017, 10:26 #4786
- Likes: aykutbilir (27th November 2017),bf1_IRL (27th November 2017),dimviii (27th November 2017),Mirek (27th November 2017),pantealex (27th November 2017),TheFlyingTuga (27th November 2017),WUff1 (27th November 2017)
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27th November 2017, 10:31 #4787Senior Member
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27th November 2017, 12:21 #4788
I am curious how will be a VW rally car without Ogier hands
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27th November 2017, 12:42 #4789Senior Member
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27th November 2017, 13:12 #4790Senior Member
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which i20 Hyundai has the 4b11 from Evo X?
https://rallysportmag.com/details-em...roton-iriz-r5/



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