Ka Alternator + Sr Pulley

[lonelydrifter]

Alright guys I did a lot of searching to find that everyone generally agrees that you can use a DOHC Ka alternator on the SR, just swap the sr pulley on.

Alright I got a new one from autozone and swapped pulleys. The pulley sticks out slightly more than the sr but the belts line up enough for me not to worry about anything.

My question is the SR pulley is larger in diameter than the KA meaning the alternator is spinning at a lower RPM. Does this affect the charging ability? I am only getting around 13.2v across the battery when the car is running. I was told it should be more like 14v.

I have blacktop SR with Jegs battery relocation kit to the hatch. Running optima redtop with 200A inline fuse and distribution block up front.

Any ideas on if this will be ok because my first battery has taken a shit, it gets 12.64v across terminals when car is off but my horn is weak and my car won't start which tells me the battery is dead and can't crank out the amps anymore. Once I get the new battery I am going to get an ammeter to make sure there is nothing staying on within my system when the car is off.

Any thoughts on the alternator thing?