TUNING TOPICS

Author

admin

Browse pages
Current page

1

Current page

2

Current page

3

Current page

4

Current page

5

Current page

6

Current page

7

Current page

8

Current page

9

Current page

10

Current page

11

Current page

12

Current page

13

Current page

14

Current page

15

Current page

16

Current page

17

Current page

18

Current page

19

Current page

20

Current page

21

Current page

22

Current page

23

Current page

24

Current page

25

Current page

26

Current page

27

Current page

28

Current page

29

Current page

30

Current page

31

Current page

32

Current page

33

Current page

34

Current page

35

Current page

36

Current page

37

Current page

38

Current page

39

Current page

40

Current page

41

Current page

42

Current page

43

Current page

44

Current page

45

Current page

46

Current page

47

Current page

48

Current page

49

Current page

50

Current page

51

Current page

52

Current page

53

Current page

54

Current page

55

Current page

56

Current page

57

Current page

58

Current page

59

Current page

60

Current page

61

Current page

62

Current page

63

Current page

64

Current page

65

Current page

66

Current page

67

Current page

68

Current page

69

Current page

70

Current page

71

Current page

72

Current page

73

Current page

74

Current page

75

Current page

76

Current page

77

Current page

78

Current page

79

Current page

80

Current page

81

Current page

82

Current page

83

Current page

84

Current page

85

Current page

86

Current page

87

Current page

88

Current page

89

Current page

90

Current page

91

Current page

92

Current page

93

Current page

94

Current page

95

Current page

96

Current page

97

Current page

98

Current page

99

Current page

100

Current page

101

Current page

102

Current page

103

Current page

104

Current page

105

Current page

106

Current page

107

Current page

108

Current page

109

Current page

110

Current page

111

Current page

112

Current page

113

Current page

114

Current page

115

Current page

116

Current page

117

Current page

118

Current page

119

Current page

120

Current page

121

Current page

122

Current page

123

Current page

124

Current page

125

Current page

126

Current page

127

Current page

128

Current page

129

Current page

130

Current page

131

Current page

132

Current page

133

Current page

134

Current page

135

Current page

136

Current page

137

Current page

138

Current page

139

Current page

140

Tyre Conversions
J. W. samples the latest transatlantic tyres

NOW 112 years old and distinguished amongst tyre companies by not contesting the original equipment (0E) car manufacturers’ market and by staying firmly in profit through the cut-throat recessionary tyre marketing period of recent years, B. F. Goodrich at Akron, Ohio, are aggressively involved in offering a new generation of rubber designed to be “unsurpassed in performance”.

Marketed under the name Comp T/A and distributed in Britain through centres in Glasgow (Birkenshaw), Sydenham, South London (South Global Tyre Marketing) and Warley, West Midlands (S&S), these new 50 and 55 per cent ultra low profile radials are aimed straight at the Pirelli P7 tyre of Porsche repute. A check through the trade advertisements shows some dealers are offering the popular Porsche 225 / 50VR 16 Comp T/A for under £140 while charging £173.50 for the equivalent Pirelli P7, although the American company generally expect to be priced exactly at P7 levels, or with a slight premium.

The T/A was designed with constant reference to the P7 and is claimed by the makers to offer superior dry and wet weather grip — which one can scientifically test — and superior ease of driving at or over the 0.8G average cornering limit that most enthusiasts reach in their everyday road driving (a Grand Prix 1982 car would typically reach 3G). In the latter case, where the car is sliding, it can only be a subjective matter as to how easy it is to control owing to driver ability and surface changes.

BF Goodrich hired the Paul Ricard Circuit in Southern France and six Porsches from Messrs Hertz. et Freres and proceeded to let us try and prove their point for them with P7 and T/A compared back-to-back on 911SC (Lane Change test); 928s automatic (Slalom) and some Porsche 944 laps of the 3.263 km. Petit Circuit, which retains an 800 m. straight with the very quick right, Courbe de Signes at the end. We also had some standing water sprayed onto the track for the 928s to tackle at 65 m.p.h. or so on a mild corner tackled as a left and a right (the romantically named 9b of the Grand Circuit).

The test results were not measured by watches or any other paraphernalia, but on both the Slalom, the Lane Change and the slower circuit corners, plus the wet test and in overall wear, the Comp TA was demonstrably superior. It seems particularly good through standing water and in becoming only slightly scuffed when the Italian tyre is feathering itself rapidly into expensive baldness.

While exit speeds from the 60 m.p.h, coned-off tests were up to 5 m.p.h. better with the Goodrich, a remark applying also to the slow corner onto the main straight of the circuit, the subjective side of the argument went clearly to Pirelli in my book. More people spun off using the Goodrich and more of my colleagues commented favourably on the informative breakaway characteristics of the Pirelli. So — as ever in my experience — there is a penalty for providing a tyre with high adhesion and good wear character. That penalty tends to be a more sudden deviation from one’s chosen path when the higher limit is reached.

BF Goodrich have done a remarkable job in developing a tyre to challenge the best in Europe and have backed that up with some remarkable race and rally performances (16th overall at 1982 Le Mans) with what I believe to have been production tyres, but they still have more work to do in providing a cover that will forgive the errant driver who suddenly finds that he has been over-optimistic. In road terms it’s very unlikely that you will reach the capable limit of these tyres, but I am told that you may have to accept some ride limitations compared with European rivals.

At present, the BFG Comp T/As are sold in seven sizes from 195/50 VR 15 to 265/50 VR 15 on 15″ diameter wheels, or the choice of 205/55 VR or 225/50 VR on 16″ diameter wheels. Alternative sizes and 60 profiles will be available in the New Year. —J.W.

You may also like

Related products