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410, 411, 412 servos

8 & 10 cyl Bristol cars Type 407 onwards - restoration, repair, maintenance etc

410, 411, 412 servos

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11-04-21, 05:31 PM

David C

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Join Date: Apr 2021

Posts: 398

Those moss units have a 1.9 : 1 boost ratio. I think the originals on the 410 were LR18503 with boost of 4.5 : 1

I can't find replacements at 4.5 : 1 but have found 4.25, so that is looking like the best option at the moment.

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