what is the hottest single coil sized pup?

They're several single-coil-sized stacked humbucking pickups which produce an extremely hot output. The most popular are the Red Lace Sensors, the Seymour Duncan Hot-Rails, the DiMarzio Chopper/Fast Track/HS-3 and the Fender Hot Noiseless, to name a few.

The Dimarzio FS2 reads about 15.4K ohm resistance. There is one, cant remember what it's called that has around 20K ohm resistance.
The FS2 doesn't sound that hot to my ears. Resistance isn't a full description of a pickups sound.

_________________
No no and no

Seymour Duncan SSL3 is a hugely powerful single coil pickup. I think from memory it clocks about 14k. It's too powerful for a neck pickup (too dark) but it makes agreat bridge p/up for a power strat.

You can buy an SSL3 with coil tap wiring option so you can cut that output if you have a spare switch or push/pull volume or tone knob.

_________________
Fender Highway & Classic 60s Strats, Fender Toronado, Telecaster, Gretsch Projet, Charvel 3, PRS SE Soapbar II & Custom 24, Burns Batwing and many others!

Try alnico III from a hwy 1 strat, hot enough to handle gain
but still keeps the stratty tone, IMO.
Also the seymour Duncan quarter pounder.

Or the sd live wire line.
Or emgs .

_________________
"Yesterday is history, tomorrow is a mystery, but today is a gift. That is why it is called the present."

oogway, kungfu panda 2008

What style of music are you trying to achieve ?

_________________
"Yesterday is history, tomorrow is a mystery, but today is a gift. That is why it is called the present."

oogway, kungfu panda 2008

EMG active.

thanks for help just installed hot rails its the sound i was after