Using GT Sophy to Grind Credits: 1.6m per hour?

[Akwaaba]

Using the custom race 'credit' glitch with my detuned Mazda Atenza 196.80pp to set up the races, and switching to the maxed out 578.33pp which is roughly tuned for circuits, I wondered how many credits each GT Sophy race would give.

Track	Payout	# Laps	Race Time	Fastest Lap	Credits	Credits / Min	Credits / Hour	Cr / Hr Rounded
Laguna Seca	68,300	3	4.52	1:34.257	102,450	22,666	1359956	1,400,000
Trial Mountain	62,300	3	6.31	2:07.310	93,450	14,810	888590	900,000
Grand Valley	87,900	3	6.22	2:03.964	131,850	21,198	1271865	1,300,000
Road Atlanta	66,800	3	4.41	1:31.481	100,200	22,721	1363265	1,400,000
Interlagos	74,100	3	5.24	1:45.408	111,150	21,212	1272710	1,300,000
Spa	104,600	3	8.03	2:39.499	156,900	19,539	1172354	1,200,000
Le Mans	189,400	3	13.52	4:36.320	284,100	21,013	1260799	1,300,000
Maggiore	98,200	3	6.47	2:12.833	147,300	22,767	1365997	1,400,000
Deep Forest	53,000	3	5.09	1:41.076	79,500	15,619	937132	1,000,000
Red Bull Ring	69,500	3	5.09	1:41.809	104,250	20,481	1228880	1,300,000
Brands Hatch	64,800	3	4.50	1:34.936	97,200	21,600	1296000	1,300,000
Dragons Trail	76,400	3	5.44	1:53.623	114,600	21,066	1263971	1,300,000
Mount Panorama	126,600	3	7.49	2:33.537	189,900	25,354	1521228	1,600,000
Tsukuba	57,800	4	4.05	0:59.955	86,700	21,407	1284444	1,300,000​
Suzuka	98,800	3	6.55	2:18.103	148,200	22,626	1357557​	1,400,000​

I am not even remotely a fast driver, and was cautious about gaining the CRB, and these were all one-and-done events. I didn't use nitrous, and the same tune and gearing for every event. I think that I could easily take 10 seconds of the Mount Panorama time, and probably much more as I was so slow on the first lap.


The original Google Sheet: