Lower compression pistons = lower vacuum pressure?
#1
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Lower compression pistons = lower vacuum pressure?
I recently had my engine rebuilt and installed lower compression forged pistons. I've noticed that my vacuum at idle is a bit lower than before the rebuild. Could it just be the pistons?
#3
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I switched from whatever stock is (10.5:1?) to 8.5:1. I haven't changed the tune significantly yet because I'm still trying to chase down a few gremlinsafter the rebuild.
There's not much of a vacuum difference, but it is noticeable on my vacuum gauge.
Thanks!
There's not much of a vacuum difference, but it is noticeable on my vacuum gauge.
Thanks!
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