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-   -   Low Idle Vacuum (http://forums.pelicanparts.com/911-engine-rebuilding-forum/1059704-low-idle-vacuum.html)

patkeefe 04-30-2020 04:05 PM
Low Idle Vacuum
 
The sort-of new 2.7 runs OK (except for the oil leaks).
I have some reground Solex grind cams in the engine. I have low vacuum at idle, no air leaks. Once it gets to 2000 RPM, the vacuum is fine. I am guessing cam overlap? The engine is single plug, 9.6:1 JE pistons, stock 2.7 heads.
TIA
Pat

icarp 04-30-2020 05:47 PM
Check the static timing and full advance .

patkeefe 04-30-2020 06:20 PM
EFI. I dialed in the static everywhere from 4-10 BTDC. Full advance doesn't matter at idle.


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