Rally2 (ex-R5) News

[RS]

It is a second generation R5 car. Bad if not better

Numerous joker updates on the first generation cars seemed to make sod all difference.

[Mirek]

I think that they still have relative disadvantage in used stock base engine even though it went through a lot of changes since the time DS3 was developed. I mean that they are still the only ones using stock 1.6 engine as a basis and therefore near stock bore/stroke ratio which is a lot different than in other cars (they have smaller bore and larger stroke).

[dimviii]

[RS]

I think that they still have relative disadvantage in used stock base engine even though it went through a lot of changes since the time DS3 was developed. I mean that they are still the only ones using stock 1.6 engine as a basis and therefore near stock bore/stroke ratio which is a lot different than in other cars (they have smaller bore and larger stroke).

Yeah, engine still doesn’t look that strong from videos so far although power delivery looks less weird than on the old car.

[Fast Eddie WRC]

The put-put-put under braking on the Citroen sounds a bit silly, but overall it looks more convincing than the previous generation PSA R5s.

Sounds awful... especially compared to the old DS3 R5 which sounded fabulous.

Looks good though.

[Sulland]

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.

[Mirek]

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.

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).

[Andre Oliveira]

250

[Andre Oliveira]

[Barreis]

VW stuff
http://classic.autosport.com/news/report.php/id/133299