Quote:
Originally Posted by rx-guru
Rallycross engines must be based on blocks that have been used for engines of the same trademark. A recent example of how far that can go is the 5-cyl. engine that Stecka Walfridsson used last year in his Renault Clio. Dunno if Lukas Walfridsson is still using it. Its block came from an engine that was used in the 1991 (!) Renault Safrane.
I understood that the engines that Peugeot used in Group B times for the 205 T16 E2 were very reliable. I'm no engineer, of course, but wonder if those engines, updated to 2014 standards, would still do well. Back in the days they produced 600+bhp with 1760cc (x 1.7 = 2992cc = 1210kg), without air restrictor. Not with up to 2056cc (x 1.7 = 3495cc = 1300kg) like most SuperCars currently run. For to have a weight advantage of 90kg one doesn't need a 1600cc engine, but can go up to 1760cc...
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Walfridson and Linnerud cars are pretty much identical and uses the same motor block
Having a 1.6 lit engine (or 1760cc) puts more pressure on the engine and to have it running strong, like a 2 litre, you would a higher RPM. The car may be quick but at faster tracks it dosen't benefit you. Unless its a wet race of course. Frode Holte for example has that problem now, using a 1,8 litre engine in his Hyundai that isn't fast enough for the faster tracks.
Laboulle drove a Xsara with a 1.7 litre engine in 2012 if I'm not wrong. Though tracks in France tends to be a little slower, it suits a smaller engine perfectly.