R2 Cars

I also like the sound of the three cylinder engine.

Does anybody know the size of the restrictor? I didn’t find any mention of it in the specific regulations http://www.fia.com/sites/default/fil...%282015%29.pdf

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Originally Posted by OldF

I also like the sound of the three cylinder engine.

Does anybody know the size of the restrictor? I didn’t find any mention of it in the specific regulations http://www.fia.com/sites/default/fil...%282015%29.pdf

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Page 29. ;)

"All the air necessary for feeding the engine must pass through this restrictor which must respect the following:
The maximum internal diameter of the restrictor is 33 mm, maintained for a minimum distance of 3 mm measured downstream of a plane perpendicular to the rotational axis situated at a maximum of 50 mm upstream of a plane passing through the most upstream extremities of the wheel blades (see Drawing 254-4)."

Even with 1 litre engine the 33 mm restrictor means it has really big power potential. For me the restrictor size seems to be way too big.

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Originally Posted by Mirek

Even with 1 litre engine the 33 mm restrictor means it has really big power potential. For me the restrictor size seems to be way too big.

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Bigger is better... :p For FIA it must be very difficult to estimate the potential of the new turbo engines compared to the atmospheric engines, especially since every event has different characteristics... Which manufacturers have the right engine to make a new R2-car? I think Opel has a good base-engine with the Adam (1.0 Ecotec).

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Originally Posted by tommeke_B

Page 29. ;)

"All the air necessary for feeding the engine must pass through this restrictor which must respect the following:
The maximum internal diameter of the restrictor is 33 mm, maintained for a minimum distance of 3 mm measured downstream of a plane perpendicular to the rotational axis situated at a maximum of 50 mm upstream of a plane passing through the most upstream extremities of the wheel blades (see Drawing 254-4)."

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The 33 mm restrictor is for the R4 (page 27);). My guess would be between 25-27 mm.

You are right and that makes sense then. No restrictor size for R2T anywhere in the document.

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Originally Posted by tommeke_B

Which manufacturers have the right engine to make a new R2-car? I think Opel has a good base-engine with the Adam (1.0 Ecotec).

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Renault/Nissan, Hyundai/Kia have 1.0 turbo engines ready or almost ready.

I'm a bit confused after reading this appendix J, what is the difference between R2C and R3C?

The level of allowed tuning. For example R2C has 5-speed gearbox and R3C has 6-speed.

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Originally Posted by OldF

The 33 mm restrictor is for the R4 (page 27);). My guess would be between 25-27 mm.

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Indeed, my mistake. ;) I know DS3 R3 has a restrictor of 29mm, so I think you're right.

Elfyn Evans debuted the new Ford Fiesta R2T on Rally North Wales but, the car couldn't even complete the first stage