Unfortunately USN submarine doctrine was crippling in the early part of the pacific war.The USN had it's largest concentration of Submarines based in the Philippines. Hart was as stated before Hart had 26 submarines, 8 S class subs, and 23 Fleet Boats. The S boats have very functional Mk X torpedoes, while the Fleet boats have the very disfunctional MK XIV torpedoes. There are 200 Torpedoes in the Torpedo Warehouse at Cavite Naval station about 30% MK X and the remainder MK XIVs. Aboard the3 tenders are about 200 torpedoes each. Canopus and Otus have the majority of MK X reloads. By 29 December OTL Canopus the last Ship of the Asiatic Fleet in Manila had been crippled by a bomb penetrating her shaft alley, and breaking a shaft. living her unable to ever leave her berth at Mirivales.
Only 4 S boats were on patrol stations off Lingayen and Sarosogon Bay, Luzon. If Hart had been able to deploy to Formosa Straight and toward the Marianas Perhaps the S boats at least would have had a chance at the invasion convoys
Commanders kept their boats submerged during daylight hours (reducing the horizon significantly) and were still labouring under the pre war fear that IJN asdic was as good as there own (which was not as good as they thought) so would conduct attacks from long distance and or without periscope using hydrophones only
Also the ‘estate’ of submarine captains labouring under these restrictions had become risk adverse ( not all certainly) and it would take some time so shake off the above.
So they might have had some luck but at that stage of the war I fear their impact would have been negligible regardless of the torpedo carried.