And I wouldn't use the 24s at all unless you had a way to compensate for them.
Running that rich fouls everything faster, requires more frequent oil changes, fouls/destroys the catalyst, sucks more gas.
Former owner of '99 CSVT - Silver #222/2760
356/334 wHP/TQ at 10psi on pump gas!
See My Mods
'05 Volvo S40 Turbo 5 AWD with 6spd, Passion Red
'06 Mazda5 Touring, 5spd,MTX, Black