Brake Booster Vacuum Hose Alternatives
#2
Rotorhead for life
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The hard part will be finding the check valve, the hose is generic. On my S5T2, I replaced the hose with a length of silicone vacuum hose, ID of the hose was 8mm if I recall. But I still had the original hose, so I just removed & reused its check valve in the new hose. Make sure you install it in the new hose with the same orientation it had in the old hose or it won't work.
#4
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Atkins sells an external check valve that they claim will work. Here their webpage: https://www.atkinsrotary.com/store/8...tegory_id=2196
If I recall, this issue was discussed before, and the poster recommended buying the FD booster hose and cutting it to length.
If I recall, this issue was discussed before, and the poster recommended buying the FD booster hose and cutting it to length.
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KNONFS (10-30-19)
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KNONFS (10-30-19)
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Check valve I used.
https://www.amazon.com/gp/product/B01K9ZIPOS/
https://www.amazon.com/gp/product/B01K9ZIPOS/
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To your engine failure point, i dont want to get into an arguement, but if the engine did fail, there wouldnt be enough vacuum to sustain brake booster function. If you dont believe me, shut your engine off while youre driving and try to use your brakes.
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Hmm. I'm fairly certain my old NA FCs didnt have them on there... could be wrong I suppose.
To your engine failure point, i dont want to get into an arguement, but if the engine did fail, there wouldnt be enough vacuum to sustain brake booster function. If you dont believe me, shut your engine off while youre driving and try to use your brakes.
To your engine failure point, i dont want to get into an arguement, but if the engine did fail, there wouldnt be enough vacuum to sustain brake booster function. If you dont believe me, shut your engine off while youre driving and try to use your brakes.
#12
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Mazda liked to use an in-hose valve...kinda like a suppository, so it wasn't immediately obvious, but if you had a vac booster, you had a check valve.
T
The point is not to sustain brake function, it's to maintain it long enough to stop. A non running engine doesn't stress the brakes much.
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I'm just speaking from personal experience; I have shut my engine off while rolling and I didnt get 2-4 more pumps out of the brake. The brake pedal instantly hardened.
#16
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Getting more than 2~4 assisted pumps sounds about normal for a non-running engine... Just from personal experience on my driveway (which is a hill) I've often had to roll one for the cars down the hill (non-running) in neutral and hit the brakes in order to make room for another car to pull out of the garage, Doesn't seem to matter which car, but 2 good assisted pumps of the brake pedal with a non-running engine is about all I'll get and it's manual brakes from there..
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