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410, 411, 412 servos 410, 411, 412 servos
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8 & 10 cyl Bristol cars Type 407 onwards - restoration, repair, maintenance etc

410, 411, 412 servos

 
 
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Old 11-04-21, 05:34 PM
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Join Date: Oct 2014
Location: Florida / Nova Scotia
Posts: 268
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Originally Posted by David C View Post
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.
Yes, I really think I will have to fit ones with higher boost sometime soon. What source and part number are the ones you found, please?

David
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