Is this fast charging method acceptable to charge FLA (flooded lead acid) batteries?

Trojan application note about lead acid batteries suggest only 13% of the capacity. That is 26A for 200AH batteries. I tried once charging my UPS Batteries at home at higher rating that 13% with a UPS that has a programmable charging curve (so current is high only at first stage-constant current). I found that the batteries released more heat and gassed more when exceeding the recommended charging voltage. I guess the battery temperature should be monitored especially when taking into consideration that the internal resistance of the batteries will increase as the battery is used.

I once emailed crown batteries company and they say that it's actually OK to charge at very high current as long as the maximum charging voltage is not voilated with no side effecta. So that contradicted with what trojan recommended. Trojan said that it will shorten the battery life.

I suggest you try and charge the battery while monitoring the temperature and making sure you're not boiling your batteries while charging.