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Weird vacuum gauge reading


Shnalla

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Hi all,

 

Today I did a little carb tuning. Needed to hear the engine roar  :grin:

When I plug my vacuum gauge, the needle is shaking, between 16 and 20 Hg/in.

 

 

Ignition timing is set correctly. It's a bone stock 350, never rebuilt I guess. Just have 2,5" exhaust, new intake and 600cfm Holley.

 

What does it means ? Valve problem ?

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Yes, that is a valve train issue

 

 

Guides are worn

 

 

Thank you !

Sounds like it's time to buy a set of aftermarket heads with a decent compression ratio and wake my engine up !

Is it a problem to drive it as it is ? Can It break something in my engine ?

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