need battery help!

[gltasn]

ive got 12.5v at battery when parked. when running it says 11.8v at battery and 11.3v on the hhh logger. battery checked out by shop as ok. i just tried a new alt ($250) today and does the same thing. terminals are clean and tight. car idles fine mabey a little higher and had a miss in the exhaust note but, not when listening to engine. what do i look for next?

[DocWalt]

Check the voltage drop in the connections on the starter, the alternator and the battery. Yes, check them again.

[mb7050]

check your ground wires and connection points.

[gltasn]

checked the with 2 diff meters. my battery term has a volt meter and i checked with my battery charger. logger and radar dummy gauge say low. dont have a way to check starter but its months old, starts and runs but i dont want to get stranded.

car ran tits before i r&r the turbos to replace a smoker.

[gltasn]

never even touched them but there still secure!

[DocWalt]

Check the voltage at the starter posts.

If you never touched the connections, they may be dirty. Do itttt

[gltasn]

Check the voltage at the starter posts.

If you never touched the connections, they may be dirty. Do itttt

do i check while running? the connections are perfect looking. i just built this engine combo months ago. only has 1400 miles since new srtroker and turbos added.

[DocWalt]

Both on and off, and also while cranking. The voltage shouldn't drop a lot. It sounds like a charging issue (bad connection or bad alt.) because the voltage is so low while driving.

[mb7050]

check your fuses too. they might not look blown so check them.

[mb7050]

and run a dedicated ground on the alternator itself and replace all the other grounds on the engine.
i bet its a ground issue.