I understood the stock TJ pump doesn't put out enough PSI. The LSX engines need a minimum of 55 PSI and if I recall, the TJ pumps put out right about 50 PSI. I'm running the E2000 pump. I know there's a debate about the E2000 begin sufficient for an LSX series motor, it's been enough for my TJ so far.how many of you are running a stock TJ pump?
If not what pump are you running?
Also what axle gears are you running?
I have a 5.3 39.5's and 4.10's and it seems to have no sack, about to pull the trigger on 5.13's. Figured i'd ask
I'm running 5.13's with 40's and it's perfect, it's fast enough on the street and works well offroad. I think you're gearing is too far off with 4.10's and 39.5's.