I just bought a 1998 12V and drove it home from Arizona. I don't know if this is normal, but when the turbo starts cranking the air flow through the A/C vents start to blow harder. Is this possible? I couln't find any similair isuues in the forum. Thanks

 

what?.. the more turbo=more flow through vents?...what kind of air? hot/cold?

 

That phenomenon is pretty commom in vehicles that you have either or: a generator, nominal alternator output, a charging system that is almost worn out, or you have every accessory in the vehicle on...so it could be quite normal

 

With just the fan on the air flow just increases with no air temp change.

 

What's your voltmeter doing when this happens?

 

No noticable change on the guage.

 

Seems like it's blowing out of the defrost vents.

 

The vents default to defrost when there is little or no vacuum. Could be it just sounds like the blower is turning faster in the defrost mode.
I would suspect you have a vacuum leak somewhere.

 

sounds like my 1964 international 424. the more RPM you give it, the brighter the lights are.