I recently came across an LS1 longblock for $200, and Im contemplating dropping it in my 69 instead of selling it....someone told me however that to run the LS1 Id have to change my fuel system in the 69 to run a "pressurized fuel system". I had never heard about this, does anyone know if this is true?
I'm not the expert here but, fuel injectors need higher pressure to operate. Instead of 6-9 PSI for a carb, TBI needs around 20 PSI and MPI needs around 40 PSI. You need a fuel pump capable of delivering said pressure and fuel lines to handle it.
the factory fuel pressure reg on an LS1 is in the tank and is factory set @ 60 PSI using the returnless system (not sure about the 97 vette, remember reading somewhere they are different, think they use a return line)
the best way is to run an intank pump to a 99+ corvette regulator/filter.. fuel goes from pump to regulator where it is filtered and sent to the engine at 60psi. excess fuel is returned to the tank from the filter/reg unit [img]smile.gif[/img]
This saves you from running a line the fuel rail and then a return line all the way back to the tank.
For LS1 related questions you might want to also try www.LS1tech.com -- they have a good hybrids section for people (like me) putting LS1's into different cars
Feel free to ask me any ??? since i just did this.