By Lewis Rutledge Last updated: 4th July 2008
Paul Sturrock has told Sky Sports News he is hoping to bring in four or five more new players before the start of the season.
Plymouth have already signed Karl Duguid from Colchester and Barnet's Jason Puncheon this summer.
But Sturrock believes his squad needs to be strengthened further if the Pilgrims are to improve on their tenth-placed finish of last season.
"We've still got a lot of irons in the fire," he told Sky Sports News. "We'd hope to have four or five more new players at the football club.
"We want to run with 22, two for each position. There's still a lot of work to be done but I'm very hopeful we'll get there as soon as possible."
Sturrock accepts there will be more expectation from the fans when the new Championship campaign gets underway.
He said: "We finished the highest we have finished in many years last season and we'd like to build on that."
Sturrock added that he was also concerned about the number of new investors in the Championship.
"There's money flying everywhere at this time which has surprised me," he explained.
"Any team will have an apprehension ahead of the new season because no one knows what is coming."

A look at the best pictures as Michael Owen completes his surprise to Manchester United.
Pictures from the unveiling of Real Madrid's reported £56 million signing at the Santiago Bernabeu.
Pictures from the Under 21 championship semi-final between England and Sweden in Gothenburg.
Pictures from England's draw with Germany in the last Group B game of the Under 21 Championships.
A look at the best pictures as Michael Owen completes his surprise to Manchester United.
| Time | Fixture |
|---|---|
| Saturday 15th August | |
| Barclays Premier League | |
| 15:00 | Aston Villa vs Wigan |
| 15:00 | Blackburn vs Man City |
| 15:00 | Bolton vs Sunderland |
| 15:00 | Chelsea vs Hull |
| 15:00 | Everton vs Arsenal |
| 15:00 | Man Utd vs Birmingham |
| 15:00 | Portsmouth vs Fulham |
| 15:00 | Stoke vs Burnley |
| 15:00 | Tottenham vs Liverpool |
| 15:00 | Wolverhampton vs West Ham |
| Tuesday 18th August | |
| Barclays Premier League | |
| 19:45 | Birmingham vs Portsmouth |
| 19:45 | Burnley vs Man Utd |
| 19:45 | Fulham vs Blackburn |
| 19:45 | Hull vs Tottenham |
| 19:45 | Sunderland vs Chelsea |
| 19:45 | Wigan vs Wolverhampton |
| Wednesday 19th August | |
| Barclays Premier League | |
| 19:45 | Liverpool vs Stoke |
| Saturday 22nd August | |
| Barclays Premier League | |
| 15:00 | Arsenal vs Portsmouth |
| 15:00 | Birmingham vs Stoke |
| 15:00 | Burnley vs Everton |
| Time | Result |
|---|---|
| Sunday 24th May | |
| Barclays Premier League | |
| Aston Villa 1 - 0 Newcastle | |
| Blackburn 0 - 0 West Brom | |
| Hull 0 - 1 Man Utd | |
| Man City 1 - 0 Bolton | |
| Sunderland 2 - 3 Chelsea | |
| Fulham 0 - 2 Everton | |
| Arsenal 4 - 1 Stoke | |
| West Ham 2 - 1 Middlesbrough | |
| Wigan 1 - 0 Portsmouth | |
| Liverpool 3 - 1 Tottenham | |
| Monday 18th May | |
| Barclays Premier League | |
| Portsmouth 3 - 1 Sunderland | |
| Sunday 17th May | |
| Barclays Premier League | |
| Chelsea 2 - 0 Blackburn | |
| West Brom 0 - 2 Liverpool | |
| Saturday 16th May | |
| Barclays Premier League | |
| Newcastle 0 - 1 Fulham | |
| Bolton 1 - 1 Hull | |
| Stoke 2 - 0 Wigan | |
| Middlesbrough 1 - 1 Aston Villa | |
| Tottenham 2 - 1 Man City | |
| Everton 3 - 1 West Ham | |
| Man Utd 0 - 0 Arsenal | |
Skysports.com takes a look at striker Michael Owen's career to date following his Man United switch.
Skysports.com assesses Michael Owen's possible free transfer to Manchester United.
Cristiano Ronaldo says that if Real were willing to pay £80million for his signature then it is a 'fair' price.
Karim Benzema has revealed he turned down the chance to join Man United, while Robin van Persie has reportedly signed a new contract.
Real Madrid-bound striker Karim Benzema has revealed he turned down the chance to join Manchester United.
Michael Owen is relishing the challenge of helping bring more success to Manchester United.
Michael Owen is eager to put his "poor spell" at Newcastle behind him by scoring goals and lifting silverware at his new club Man United.