High compression and engine management

[Uppertorso]

I am contemplating building an all motor D block, but I was wondering at what point do you need to add more fuel (fuel rail, injectors, fuel pressure regulator, etc), or a new engine management system over stock???

10:1
11:1
12:1
13:1
14:1

any input is appreciated, thanks guys.

 

[hybrid89]

coming from what would be a low to mid 9:1 D block, i would say in the upwards of 11:1 and higher is when you need to look into upgrading this for optimum fuel. the FPR and rail can handel the most out of all the components. you are going to be limited by the OEM fuel maps, injectors, and fuel pump first.

 

[Uppertorso]

THANKS

 

[posol]

you're going to be limited by pump gas and detonation before any of your components...

12:1 is going to push it on an un-tuned car running 93...
with an ems, you can take that well into the 13s though, and still use 95% of your oem fuel system...