[LiqTenExp]

High side fuel pressure discussion for anyone doing their own tuning...

Something that was in my tune before I took it over it was ~3400 psi high side peak. The car has been like this for 5 years and makes great power and reaches commanded high side fuel pressure...See attachment from a dyno run back in 2021.

I'm stock ZL1 LT4 high side fuel pump, stock low side pump w/JMS FuelMax, and stock injectors. I have a cam w/larger fuel lobe, tvs 2300, and everything else you'd expect to reach 800+whp

The car has no issues. I understand the concern for injectors to misbehave above 2900 but this was a setting I never looked at touched once I took over the tune a few year ago (there wasn't issues in this area so just missed it). Peak injector DC is 5 ms, it was below 5.4 ms before I added a 50/50 meth spray. I assume if I turned down pressure that I'd need more DC to compensate... anyone experiment with this?

I guess my takeaway is it is possible to maintain those pressures with stock everything fuel system wise (w/JMS). This also might be something to "turn down" a little and see how the car responds.