| Designer: |
Michael
Colucci , David Bruns, Roman Slobodinskj |
| Layout: |
Mid-engine,
rear-wheel drive |
| Monocoque: |
Chapman built aluminum
honeycomb |
| Engine: |
Porsche
3.0 liter, flat-6, single turbo, 2 valves per cylinder, DOHC, air cooled |
| Horsepower: |
850+
in qualifying, 800-825 in race |
| Torque: |
495
lb-ft @ 5500 rpm |
| Gearbox: |
Porsche
Type 956/62, 5-speed + reverse, synchromesh, magnesium case with magnesium
bellhousing |
| Clutch: |
Sachs
single-plate clutch |
| Steering: |
Rack
and pinion, 1.5 turns lock to lock |
| Suspension: |
F:
Upper and lower wishbones, spring/damper directly acting on lower wishbone,
R: Lower wishbone, w/upper rockerarm actuating inboard gearbox mounted
spring/damper |
| Brakes: |
Twin
single piston caliper mounted on cast magnesium uprights. |
| Wheels: |
BBS
three piece modular alloy
F:
17 x 13
R:
17 x 14.5 |
| Tires: |
BF
Goodrich T/A Radials
F:
335/30ZR17
R:
405/35ZR17 |
| Length: |
4770
mm |
| Width: |
1988
mm |
| Height: |
1049
mm |
| Wheelbase: |
2649
mm |
| Front track: |
1651
mm |
| Rear track: |
1552
mm |
| Weight: |
955
kgs |
| Tank capacity: |
120
liters |
Almost
as soon as customers began to receive the Porsche 962 did they begin to
modify and improve upon the factory design. One of the primary areas
of development was the monocoque. At the time there was a perceived
safety concern regarding the factory 962 monocoques which were constructed
merely out of folded sheet aluminum and then riveted and bonded together.
Following Pete Halsmer’s 1985 Riverside accident in the BF Goodrich 962
(962-108), Jim Busby contacted Jim Chapman about designing and manufacturing
a new tub for the soon to be repaired chassis 962-108. The Chapman
tubs would be manufactured from aluminum honeycomb sheet and hence substantially
stronger than OEM. Jim Busby came to an agreement with Al Holbert
and the first Chapman tub would actually go into Holbert’s 962 chassis
HR1. Busby’s repaired 962 would henceforth be chassis #962-108C,
'C' for Chapman, and would form the basis for the much modified 1988/89
Busby Porsche 962.
