Brilliant ????
This diagram gives a little more insight into Toyota Team Europe's infamous turbo restrictor modification, the one which got the team uncermoniously booted out of the WRC for the whole of the 1996 season!
A complete strip-down of the Celica GT4 ST205's engine was conducted midway through Rally Spain by the FIA in order to work out just what was enabling the Toyota's to be so quick off the mark, and it was found that the turbo restrictors were modified in a number of fiendishly clever ways. The restrictor was designed to be able to move freely and could therefore be positioned further away from the turbine, significantly further than the 50mm limit speficied by the FIA. The ingeniously clever setup also enabled air to enter the engine without having first passed through the restrictor, a further contravention of the rules governing the sport. This bypass valve was actuated by a spring and worked in conjunction with a highly modified tube leading from the FIA mandated restrictor to the turbo. This could open the bypass valve by a full 5mm, hence the Celica's performance advantage and supposed power advantage of up to 50bhp.
TTE's very public shaming was tempered by a general acceptance that while the device had been against the rules and indeed the spirit of the WRC, it had been beautifully engineered and executed bit of cheating.
Max Mosely was especially vociferous in his description of the device:
"Inside it was beautifully made. The springs inside the hose had been polished and machined so not to impede the air which passed through. To force the springs open without the special tool would require substantial force. It is the most sophisticated and ingenious device either I or the FIA’s technical experts have seen for a long-time. It was so well made that there was no gap apparent to suggest there was any means of opening it.”
Sent from my SM-G935F using Tapatalk
This diagram gives a little more insight into Toyota Team Europe's infamous turbo restrictor modification, the one which got the team uncermoniously booted out of the WRC for the whole of the 1996 season!
A complete strip-down of the Celica GT4 ST205's engine was conducted midway through Rally Spain by the FIA in order to work out just what was enabling the Toyota's to be so quick off the mark, and it was found that the turbo restrictors were modified in a number of fiendishly clever ways. The restrictor was designed to be able to move freely and could therefore be positioned further away from the turbine, significantly further than the 50mm limit speficied by the FIA. The ingeniously clever setup also enabled air to enter the engine without having first passed through the restrictor, a further contravention of the rules governing the sport. This bypass valve was actuated by a spring and worked in conjunction with a highly modified tube leading from the FIA mandated restrictor to the turbo. This could open the bypass valve by a full 5mm, hence the Celica's performance advantage and supposed power advantage of up to 50bhp.
TTE's very public shaming was tempered by a general acceptance that while the device had been against the rules and indeed the spirit of the WRC, it had been beautifully engineered and executed bit of cheating.
Max Mosely was especially vociferous in his description of the device:
"Inside it was beautifully made. The springs inside the hose had been polished and machined so not to impede the air which passed through. To force the springs open without the special tool would require substantial force. It is the most sophisticated and ingenious device either I or the FIA’s technical experts have seen for a long-time. It was so well made that there was no gap apparent to suggest there was any means of opening it.”
Sent from my SM-G935F using Tapatalk