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How much vacuum should a standard 186 have at idle compared to a 186 with a stage 3 cam?
I’ve got 17” hg at idle
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Normal idle vacuum for a stock 186 should be around 19-inches.
The bigger the cam, the lower vacuum. A big cam will have a low vacuum at idle.
Stage 3 cam doesn't mean much these days, that's very much a 70s thing.
It's the actually the duration & lift that is important.
Dr Terry |
If at first you don't succeed, just call it Version 1.0 |
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Rank: Newbie
Groups: Registered
Joined: 13/01/2021(UTC) Posts: 5 ![New Zealand]( "New Zealand")
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Originally Posted by: Dr Terry  Normal idle vacuum for a stock 186 should be around 19-inches.
The bigger the cam, the lower vacuum. A big cam will have a low vacuum at idle.
Stage 3 cam doesn't mean much these days, that's very much a 70s thing.
It's the actually the duration & lift that is important.
Dr Terry https://www.ebay.com.au/...FT-EPC1321-/183468266577That’s the cam there, yes I know it’s not a good brand 😬
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