Pirelli motorsport boss Paul Hembery has called for a relaxation in the current F1 testing rules to allow for more on-track running ahead of changes to the regulations in the sport next year.

While a deal has still to be agreed beyond the current season, Pirelli is expected to continue as tyre supplier into the 2014 campaign, when F1 will switch to new 1.6-litre turbo-charged engines.

Currently, Pirelli is only to make use of its own 2010-spec Renault to carry out any testing, with that car itself already a world away from the cars currently seen on track.

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Speaking to Reuters, Hembery insisted that the current rules - which have a limit of just twelve days of track action prior to the opening race of the year - would make it hard for the company to produce a tyre for the latest breed of F1 machinery and called for a 'sensible' decision to be taken to benefit all concerned.

Without any change, Hembery warned that it would be difficult to produce the right compounds to deal with the demands of the new engines with Pirelli eager to make sure it knows what to expect before the first race of 2014 comes around.

"We are getting varied data from different teams which means there are going to be some surprises," he said. "We don't want to be as a tyre maker in a situation where we come up with some surprises when we get to Melbourne. We want to know before.

"Next season if all we have available to us is a 2011 car, that's going to help us with nothing when you've got a very different powertrain. I think they are going to have to go back and revisit it [the ban]. I don't think Ferrari and some of the other teams are going to let it go.

"I am hopeful that we can have some sort of compromise agreement where we can have some sensible, limited in-season testing."

Hembery warned that if the tyre compounds were wrong, it could have a major impact in what happens on track.

"I don't think we'll have an issue with structural integrity but we could end up certainly with a compounding issue where we have completely the wrong compounds for the track or what's going to be the influence of the powertrain on the tyre," he said.

"There are championships, less visible than F1, where those sorts of things have happened and you've ended up having to take ten laps off the race distance and things like that."