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| Forum name | Performance/Engine |
| Topic subject | Low compression and vacuum? |
| Topic URL | https://forums.2gnt.com/dcboard.php?az=show_topic&forum=i5&topic_id=31714 |
31714, Low compression and vacuum?
Posted by 420aVenger, Sep-02-02 01:23 PM
Do low compression pistons cause lower vac levels? I am almost 100%sure I have no vac leaks but I'm getting ~12hg vac at idle. Is that right or am I overlooking a leak? Does anything else cause low vac?
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31715, RE: Low compression and vacuum?
Posted by optimuspeterson, Sep-02-02 02:30 PM
i'm getting close to 18hg. i would rig up a leak tester on your turbo and see if you loose any air any whare.
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31716, RE: Low compression and vacuum?
Posted by turbosrule, Sep-03-02 12:52 PM
i played around with the (AEM) timming gears! now i have like 15-16 hg
i was @ 12-13 hg.
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31717, RE: Low compression and vacuum?
Posted by 420aVenger, Sep-03-02 12:56 PM
Thanks. I'll double check everything (don't have a tester)....
Finally got the car painted eh? Looks AWESOME!!!
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31718, RE: Low compression and vacuum?
Posted by fly1, Sep-03-02 01:08 PM
Is that vacuum with all accessories off? If so, 12-13 inHg is pretty low -- even with lower compression pistons. Actually, I did not see any big difference in vacuum at idle from stock pistons to 8.8:1 pistons. Just check for a possible vacuum leak.
Turbosrule, that hood and paint job looks sweeet! What kind of hood is that?
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