If PSA somehow ends with 4 R5 cars in their hands, things will get interesting..
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When you guys are making theories why this or that about engines maybe I'm wrong, but I think everything makes more sense if one states the dimensions of things...presuming you know them..
I build and have built road car and rally motors..Numbers are everything to me..When speaking of Evo X it might help to know it's bore and stroke (86x86) and what it changed from in the old 4G63 (85x 89) because then, when you read Misterbitchi info it makes sense when they say why the changed it (when obviously it had worked well for almost 15-17 years)..They said "now 86mm bore to allow 1mm larger valves"..
So talking about these WRC 1,6 motors its interesting seeing everybody using 84mm bore versus production 78mm or whatever..More room for bigger valves.
In a 3 way conversation a couple of weeks ago between me and a young clubbie guy in Michigan and a fast Golf guy in Sweden who has an old VW Motorsport kit car we were all reminded that those kit car engines VW used they went UP to 84mm (and destroked to not go over 2000cc) from VWs 82,5mm
Both guys were puzzled---neither being engine guys..
As soon as I said "more room in a 84mm circle for bigger valve" both boys said AHA!!!..
So please, numbers...
With pleasure Jan. Take it easy, I am not sure that the sources I found were all right.
PSA R5 engine (based on 1.6 stock EP6CDT): stock 1598 ccm engine has 77x85,8 but since the cylinder spacing is 84 mm I think the bore can not be larger with competition 1620 ccm R5 engine
Škoda R5 engine (modified stock 1.8): 82,5x75,5
Ford R5 (engine 2016, modified stock 2.0): 85x71,3
Hyundai R5 engine: 83x73,8
From Homologation papers:
PSA engine: 77,016 x 85,9
Fiesta: 85,0 x 71,3
Thanks for confirmation. The PSA block is simply too small for wider pistons.
http://www.autosport.com/news/report...ndar-expansion
Just what you guys told us a few days ago from MN Rally.
If this info has been posted somewhere else, sorry for the double post. I read that Lukyanuk crashed heavily (into another rally car strangely) and was injured. He and two others are injured and the co-driver in one of the cars died.
Does anyone know details about it? How can two rally cars crash into each other during a test?
Edit, just found the other thread. Don't know how I missed it to he frank!