Due to a problematic alternator relocation, I would like to run without one.

Only need to run the MSD Digital 6, BG400 fuel pump and Moroso water pump going down track and then start the fan on the return road.

Do you think a big 12v battery charged between rounds will get the job done?

Due to a problematic alternator relocation, I would like to run without one.What problem are you having, not charging, keeping a belt on or???

Only need to run the MSD Digital 6, BG400 fuel pump and Moroso water pump going down track and then start the fan on the return road.

Do you think a big 12v battery charged between rounds will get the job done?
If no alternator, consider a 16 volt battery and a 16 volt charger. 12v batteries start at 12.6 volts or so fully charged. As the battery becomes discharged and/or more load is applied, voltage drops, makes fuel pumps, water pumps ect... run slower. A 16 volt battery will have a higher voltage, allowing your accessories to run normally till the battery is dead.

They make 16v batteries and chargers just for racing without a alternator.

The alternator problem involves the following:

Due to procharger belt need to relocate alternator to passenger side.

Have the old style Moroso cast aluminum electric water pump does not work well with aftermarket alternator brackets. But this water pump is quite thin and so leaves room for the electric fan.

Would have to use a mandrel setup for the crank alternator pulley and custom alt bracket.

So dumping the alternator, etc will get some weight off the front to help offset some of the procharger weight.

I have read a bit about the 16v stuff. Is there not a problem then with providing too much voltage for equipment that is designed to run around 13-14 volts?

The alternator problem involves the following:

Due to procharger belt need to relocate alternator to passenger side.

Have the old style Moroso cast aluminum electric water pump does not work well with aftermarket alternator brackets. But this water pump is quite thin and so leaves room for the electric fan.

Would have to use a mandrel setup for the crank alternator pulley and custom alt bracket.

So dumping the alternator, etc will get some weight off the front to help offset some of the procharger weight.
Now I see why you want to lose the alternator.

I have read a bit about the 16v stuff. Is there not a problem then with providing too much voltage for equipment that is designed to run around 13-14 volts?

There is no problem in a race only setup like you have. The voltage is a little less when the battery has a load on it, and even less when you have to hot lap in the later rds.

The MSD can easily handle the voltage...

From the MSD instuctions.......

An MSD 6 Series Ignition Control will operate on any negative ground, 12 volt electrical system with a distributor. The MSD can be used with 16 volt batteries and can withstand a momentary 24 volts in case of jump starts. The Ignition will deliver full voltage with a supply of 9 - 18 volts and will operate with a supply voltage as low as six volts.