2nd Generation Specific (1986-1992) 1986-1992 Discussion including performance modifications and technical support sections.

power brakes booster

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Old Jan 2, 2004 | 07:35 AM
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london's Avatar
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From: trinidad, West indies
power brakes booster

need to know if the power brake booster for a turbo 2nd gen and the power brakes booster for a NA 2nd gen if they are the same or if the turbo booster is bigger,doing a conversion where i put a turbo motor in a NA car so i need to know .Thanks.
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Old Jan 2, 2004 | 11:20 AM
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Depends if the NA has the 4 piston calipers. If it does, then yes they are the same.
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Old Jan 2, 2004 | 08:58 PM
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The S5 TII has a dual diaphram brake booster. The master cylinder on these cars also had a larger bore. I assume they did this to give it slightly less pedal travel because of the greater volume of fluid needed for the 4 piston calipers. The tandem booster makes up for the less force the larger master cylinder can deliver.

Cooper
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Old Jan 2, 2004 | 09:52 PM
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Originally posted by lacycw
The S5 TII has a dual diaphram brake booster. The master cylinder on these cars also had a larger bore. I assume they did this to give it slightly less pedal travel because of the greater volume of fluid needed for the 4 piston calipers. The tandem booster makes up for the less force the larger master cylinder can deliver.

Cooper
The S4 Turbo is NOT dual diaphram???

more specificly what changes were made from S4 to S5?
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Old Jan 2, 2004 | 10:37 PM
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From: trinidad, West indies
so then i need a S5 brakes booster

well i guess i have to change the brake booster then since my car came with a na engine and the calipers were not 4 pistons but i did put them on recently.
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